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The common clk framework changes for 3.7 are dominated by ARM platform

Browse Source 
ports to the framework along with one MIPS port, one MFD port, one minor
 framework enhancement and one helper function for platforms expressing
 their clock data through device tree.
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Merge tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux

Pull clk framework update from Michael Turquette:
 "The common clk framework changes for 3.7 are dominated by ARM platform
  ports to the framework along with one MIPS port, one MFD port, one
  minor framework enhancement and one helper function for platforms
  expressing their clock data through device tree."

* tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux:
  clk: add of_clk_src_onecell_get() support
  clk: ux500: Define smp_twd clock for u8500
  mfd: dbx500: Provide a more accurate smp_twd clock
  clk: ux500: Support for prmcu_rate clock
  clk: Provide option for clk_get_rate to issue hw for new rate
  clock: max77686: Add driver for Maxim 77686 32Khz crystal oscillator.
  ARM: ux500: Switch to use common clock framework
  clk: ux500: Clock definitions for u8500
  clk: ux500: First version of clock definitions for ux500
  clk: ux500: Adapt PRCMU and PRCC clocks for common clk
  clk: versatile: make config option boolean
  clk: add Loongson1B clock support
  arm: mmp: make all SOCs use common clock by default
  clk: mmp: add clock definition for mmp2
  clk: mmp: add clock definition for pxa910
  clk: mmp: add clock definition for pxa168
  clk: mmp: add mmp specific clocks
  clk: convert ARM RealView to common clk
  clk: prima2: move from arch/arm/mach to drivers/clk
  ARM: PRIMA2: convert to common clk and finish full clk tree
This commit is contained in:
Linus Torvalds 2012-10-01 12:09:04 -07:00
commit 2c0c86d5b6
47 changed files with 4360 additions and 1547 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/arm/Kconfig
View File

@ -273,7 +273,7 @@ config ARCH_INTEGRATOR
select ARM_AMBA
select ARCH_HAS_CPUFREQ
select COMMON_CLK
select CLK_VERSATILE
select COMMON_CLK_VERSATILE
select HAVE_TCM
select ICST
select GENERIC_CLOCKEVENTS
@ -289,13 +289,12 @@ config ARCH_INTEGRATOR
config ARCH_REALVIEW
bool "ARM Ltd. RealView family"
select ARM_AMBA
select CLKDEV_LOOKUP
select HAVE_MACH_CLKDEV
select COMMON_CLK
select COMMON_CLK_VERSATILE
select ICST
select GENERIC_CLOCKEVENTS
select ARCH_WANT_OPTIONAL_GPIOLIB
select PLAT_VERSATILE
select PLAT_VERSATILE_CLOCK
select PLAT_VERSATILE_CLCD
select ARM_TIMER_SP804
select GPIO_PL061 if GPIOLIB
@ -413,7 +412,7 @@ config ARCH_PRIMA2
select NO_IOPORT
select ARCH_REQUIRE_GPIOLIB
select GENERIC_CLOCKEVENTS
select CLKDEV_LOOKUP
select COMMON_CLK
select GENERIC_IRQ_CHIP
select MIGHT_HAVE_CACHE_L2X0
select PINCTRL

3
arch/arm/mach-mmp/Kconfig
View File

@ -108,18 +108,21 @@ endmenu
config CPU_PXA168
bool
select CPU_MOHAWK
select COMMON_CLK
help
Select code specific to PXA168
config CPU_PXA910
bool
select CPU_MOHAWK
select COMMON_CLK
help
Select code specific to PXA910
config CPU_MMP2
bool
select CPU_PJ4
select COMMON_CLK
help
Select code specific to MMP2. MMP2 is ARMv7 compatible.

1
arch/arm/mach-prima2/Makefile
View File

@ -1,6 +1,5 @@
obj-y := timer.o
obj-y += irq.o
obj-y += clock.o
obj-y += rstc.o
obj-y += prima2.o
obj-y += rtciobrg.o

510
arch/arm/mach-prima2/clock.c
View File

@ -1,510 +0,0 @@
/*
* Clock tree for CSR SiRFprimaII
*
* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
*
* Licensed under GPLv2 or later.
*/
#include <linux/module.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/clkdev.h>
#include <linux/clk.h>
#include <linux/spinlock.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/mach/map.h>
#include <mach/map.h>
#define SIRFSOC_CLKC_CLK_EN0 0x0000
#define SIRFSOC_CLKC_CLK_EN1 0x0004
#define SIRFSOC_CLKC_REF_CFG 0x0014
#define SIRFSOC_CLKC_CPU_CFG 0x0018
#define SIRFSOC_CLKC_MEM_CFG 0x001c
#define SIRFSOC_CLKC_SYS_CFG 0x0020
#define SIRFSOC_CLKC_IO_CFG 0x0024
#define SIRFSOC_CLKC_DSP_CFG 0x0028
#define SIRFSOC_CLKC_GFX_CFG 0x002c
#define SIRFSOC_CLKC_MM_CFG 0x0030
#define SIRFSOC_LKC_LCD_CFG 0x0034
#define SIRFSOC_CLKC_MMC_CFG 0x0038
#define SIRFSOC_CLKC_PLL1_CFG0 0x0040
#define SIRFSOC_CLKC_PLL2_CFG0 0x0044
#define SIRFSOC_CLKC_PLL3_CFG0 0x0048
#define SIRFSOC_CLKC_PLL1_CFG1 0x004c
#define SIRFSOC_CLKC_PLL2_CFG1 0x0050
#define SIRFSOC_CLKC_PLL3_CFG1 0x0054
#define SIRFSOC_CLKC_PLL1_CFG2 0x0058
#define SIRFSOC_CLKC_PLL2_CFG2 0x005c
#define SIRFSOC_CLKC_PLL3_CFG2 0x0060
#define SIRFSOC_CLOCK_VA_BASE SIRFSOC_VA(0x005000)
#define KHZ 1000
#define MHZ (KHZ * KHZ)
struct clk_ops {
unsigned long (*get_rate)(struct clk *clk);
long (*round_rate)(struct clk *clk, unsigned long rate);
int (*set_rate)(struct clk *clk, unsigned long rate);
int (*enable)(struct clk *clk);
int (*disable)(struct clk *clk);
struct clk *(*get_parent)(struct clk *clk);
int (*set_parent)(struct clk *clk, struct clk *parent);
};
struct clk {
struct clk *parent; /* parent clk */
unsigned long rate; /* clock rate in Hz */
signed char usage; /* clock enable count */
signed char enable_bit; /* enable bit: 0 ~ 63 */
unsigned short regofs; /* register offset */
struct clk_ops *ops; /* clock operation */
};
static DEFINE_SPINLOCK(clocks_lock);
static inline unsigned long clkc_readl(unsigned reg)
{
return readl(SIRFSOC_CLOCK_VA_BASE + reg);
}
static inline void clkc_writel(u32 val, unsigned reg)
{
writel(val, SIRFSOC_CLOCK_VA_BASE + reg);
}
/*
* osc_rtc - real time oscillator - 32.768KHz
* osc_sys - high speed oscillator - 26MHz
*/
static struct clk clk_rtc = {
.rate = 32768,
};
static struct clk clk_osc = {
.rate = 26 * MHZ,
};
/*
* std pll
*/
static unsigned long std_pll_get_rate(struct clk *clk)
{
unsigned long fin = clk_get_rate(clk->parent);
u32 regcfg2 = clk->regofs + SIRFSOC_CLKC_PLL1_CFG2 -
SIRFSOC_CLKC_PLL1_CFG0;
if (clkc_readl(regcfg2) & BIT(2)) {
/* pll bypass mode */
clk->rate = fin;
} else {
/* fout = fin * nf / nr / od */
u32 cfg0 = clkc_readl(clk->regofs);
u32 nf = (cfg0 & (BIT(13) - 1)) + 1;
u32 nr = ((cfg0 >> 13) & (BIT(6) - 1)) + 1;
u32 od = ((cfg0 >> 19) & (BIT(4) - 1)) + 1;
WARN_ON(fin % MHZ);
clk->rate = fin / MHZ * nf / nr / od * MHZ;
}
return clk->rate;
}
static int std_pll_set_rate(struct clk *clk, unsigned long rate)
{
unsigned long fin, nf, nr, od, reg;
/*
* fout = fin * nf / (nr * od);
* set od = 1, nr = fin/MHz, so fout = nf * MHz
*/
nf = rate / MHZ;
if (unlikely((rate % MHZ) || nf > BIT(13) || nf < 1))
return -EINVAL;
fin = clk_get_rate(clk->parent);
BUG_ON(fin < MHZ);
nr = fin / MHZ;
BUG_ON((fin % MHZ) || nr > BIT(6));
od = 1;
reg = (nf - 1) | ((nr - 1) << 13) | ((od - 1) << 19);
clkc_writel(reg, clk->regofs);
reg = clk->regofs + SIRFSOC_CLKC_PLL1_CFG1 - SIRFSOC_CLKC_PLL1_CFG0;
clkc_writel((nf >> 1) - 1, reg);
reg = clk->regofs + SIRFSOC_CLKC_PLL1_CFG2 - SIRFSOC_CLKC_PLL1_CFG0;
while (!(clkc_readl(reg) & BIT(6)))
cpu_relax();
clk->rate = 0; /* set to zero will force recalculation */
return 0;
}
static struct clk_ops std_pll_ops = {
.get_rate = std_pll_get_rate,
.set_rate = std_pll_set_rate,
};
static struct clk clk_pll1 = {
.parent = &clk_osc,
.regofs = SIRFSOC_CLKC_PLL1_CFG0,
.ops = &std_pll_ops,
};
static struct clk clk_pll2 = {
.parent = &clk_osc,
.regofs = SIRFSOC_CLKC_PLL2_CFG0,
.ops = &std_pll_ops,
};
static struct clk clk_pll3 = {
.parent = &clk_osc,
.regofs = SIRFSOC_CLKC_PLL3_CFG0,
.ops = &std_pll_ops,
};
/*
* clock domains - cpu, mem, sys/io
*/
static struct clk clk_mem;
static struct clk *dmn_get_parent(struct clk *clk)
{
struct clk *clks[] = {
&clk_osc, &clk_rtc, &clk_pll1, &clk_pll2, &clk_pll3
};
u32 cfg = clkc_readl(clk->regofs);
WARN_ON((cfg & (BIT(3) - 1)) > 4);
return clks[cfg & (BIT(3) - 1)];
}
static int dmn_set_parent(struct clk *clk, struct clk *parent)
{
const struct clk *clks[] = {
&clk_osc, &clk_rtc, &clk_pll1, &clk_pll2, &clk_pll3
};
u32 cfg = clkc_readl(clk->regofs);
int i;
for (i = 0; i < ARRAY_SIZE(clks); i++) {
if (clks[i] == parent) {
cfg &= ~(BIT(3) - 1);
clkc_writel(cfg | i, clk->regofs);
/* BIT(3) - switching status: 1 - busy, 0 - done */
while (clkc_readl(clk->regofs) & BIT(3))
cpu_relax();
return 0;
}
}
return -EINVAL;
}
static unsigned long dmn_get_rate(struct clk *clk)
{
unsigned long fin = clk_get_rate(clk->parent);
u32 cfg = clkc_readl(clk->regofs);
if (cfg & BIT(24)) {
/* fcd bypass mode */
clk->rate = fin;
} else {
/*
* wait count: bit[19:16], hold count: bit[23:20]
*/
u32 wait = (cfg >> 16) & (BIT(4) - 1);
u32 hold = (cfg >> 20) & (BIT(4) - 1);
clk->rate = fin / (wait + hold + 2);
}
return clk->rate;
}
static int dmn_set_rate(struct clk *clk, unsigned long rate)
{
unsigned long fin;
unsigned ratio, wait, hold, reg;
unsigned bits = (clk == &clk_mem) ? 3 : 4;
fin = clk_get_rate(clk->parent);
ratio = fin / rate;
if (unlikely(ratio < 2 || ratio > BIT(bits + 1)))
return -EINVAL;
WARN_ON(fin % rate);
wait = (ratio >> 1) - 1;
hold = ratio - wait - 2;
reg = clkc_readl(clk->regofs);
reg &= ~(((BIT(bits) - 1) << 16) | ((BIT(bits) - 1) << 20));
reg |= (wait << 16) | (hold << 20) | BIT(25);
clkc_writel(reg, clk->regofs);
/* waiting FCD been effective */
while (clkc_readl(clk->regofs) & BIT(25))
cpu_relax();
clk->rate = 0; /* set to zero will force recalculation */
return 0;
}
/*
* cpu clock has no FCD register in Prima2, can only change pll
*/
static int cpu_set_rate(struct clk *clk, unsigned long rate)
{
int ret1, ret2;
struct clk *cur_parent, *tmp_parent;
cur_parent = dmn_get_parent(clk);
BUG_ON(cur_parent == NULL || cur_parent->usage > 1);
/* switch to tmp pll before setting parent clock's rate */
tmp_parent = cur_parent == &clk_pll1 ? &clk_pll2 : &clk_pll1;
ret1 = dmn_set_parent(clk, tmp_parent);
BUG_ON(ret1);
ret2 = clk_set_rate(cur_parent, rate);
ret1 = dmn_set_parent(clk, cur_parent);
clk->rate = 0; /* set to zero will force recalculation */
return ret2 ? ret2 : ret1;
}
static struct clk_ops cpu_ops = {
.get_parent = dmn_get_parent,
.set_parent = dmn_set_parent,
.set_rate = cpu_set_rate,
};
static struct clk clk_cpu = {
.parent = &clk_pll1,
.regofs = SIRFSOC_CLKC_CPU_CFG,
.ops = &cpu_ops,
};
static struct clk_ops msi_ops = {
.set_rate = dmn_set_rate,
.get_rate = dmn_get_rate,
.set_parent = dmn_set_parent,
.get_parent = dmn_get_parent,
};
static struct clk clk_mem = {
.parent = &clk_pll2,
.regofs = SIRFSOC_CLKC_MEM_CFG,
.ops = &msi_ops,
};
static struct clk clk_sys = {
.parent = &clk_pll3,
.regofs = SIRFSOC_CLKC_SYS_CFG,
.ops = &msi_ops,
};
static struct clk clk_io = {
.parent = &clk_pll3,
.regofs = SIRFSOC_CLKC_IO_CFG,
.ops = &msi_ops,
};
/*
* on-chip clock sets
*/
static struct clk_lookup onchip_clks[] = {
{
.dev_id = "rtc",
.clk = &clk_rtc,
}, {
.dev_id = "osc",
.clk = &clk_osc,
}, {
.dev_id = "pll1",
.clk = &clk_pll1,
}, {
.dev_id = "pll2",
.clk = &clk_pll2,
}, {
.dev_id = "pll3",
.clk = &clk_pll3,
}, {
.dev_id = "cpu",
.clk = &clk_cpu,
}, {
.dev_id = "mem",
.clk = &clk_mem,
}, {
.dev_id = "sys",
.clk = &clk_sys,
}, {
.dev_id = "io",
.clk = &clk_io,
},
};
int clk_enable(struct clk *clk)
{
unsigned long flags;
if (unlikely(IS_ERR_OR_NULL(clk)))
return -EINVAL;
if (clk->parent)
clk_enable(clk->parent);
spin_lock_irqsave(&clocks_lock, flags);
if (!clk->usage++ && clk->ops && clk->ops->enable)
clk->ops->enable(clk);
spin_unlock_irqrestore(&clocks_lock, flags);
return 0;
}
EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
{
unsigned long flags;
if (unlikely(IS_ERR_OR_NULL(clk)))
return;
WARN_ON(!clk->usage);
spin_lock_irqsave(&clocks_lock, flags);
if (--clk->usage == 0 && clk->ops && clk->ops->disable)
clk->ops->disable(clk);
spin_unlock_irqrestore(&clocks_lock, flags);
if (clk->parent)
clk_disable(clk->parent);
}
EXPORT_SYMBOL(clk_disable);
unsigned long clk_get_rate(struct clk *clk)
{
if (unlikely(IS_ERR_OR_NULL(clk)))
return 0;
if (clk->rate)
return clk->rate;
if (clk->ops && clk->ops->get_rate)
return clk->ops->get_rate(clk);
return clk_get_rate(clk->parent);
}
EXPORT_SYMBOL(clk_get_rate);
long clk_round_rate(struct clk *clk, unsigned long rate)
{
if (unlikely(IS_ERR_OR_NULL(clk)))
return 0;
if (clk->ops && clk->ops->round_rate)
return clk->ops->round_rate(clk, rate);
return 0;
}
EXPORT_SYMBOL(clk_round_rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
if (unlikely(IS_ERR_OR_NULL(clk)))
return -EINVAL;
if (!clk->ops || !clk->ops->set_rate)
return -EINVAL;
return clk->ops->set_rate(clk, rate);
}
EXPORT_SYMBOL(clk_set_rate);
int clk_set_parent(struct clk *clk, struct clk *parent)
{
int ret;
unsigned long flags;
if (unlikely(IS_ERR_OR_NULL(clk)))
return -EINVAL;
if (!clk->ops || !clk->ops->set_parent)
return -EINVAL;
spin_lock_irqsave(&clocks_lock, flags);
ret = clk->ops->set_parent(clk, parent);
if (!ret) {
parent->usage += clk->usage;
clk->parent->usage -= clk->usage;
BUG_ON(clk->parent->usage < 0);
clk->parent = parent;
}
spin_unlock_irqrestore(&clocks_lock, flags);
return ret;
}
EXPORT_SYMBOL(clk_set_parent);
struct clk *clk_get_parent(struct clk *clk)
{
unsigned long flags;
if (unlikely(IS_ERR_OR_NULL(clk)))
return NULL;
if (!clk->ops || !clk->ops->get_parent)
return clk->parent;
spin_lock_irqsave(&clocks_lock, flags);
clk->parent = clk->ops->get_parent(clk);
spin_unlock_irqrestore(&clocks_lock, flags);
return clk->parent;
}
EXPORT_SYMBOL(clk_get_parent);
static void __init sirfsoc_clk_init(void)
{
clkdev_add_table(onchip_clks, ARRAY_SIZE(onchip_clks));
}
static struct of_device_id clkc_ids[] = {
{ .compatible = "sirf,prima2-clkc" },
{},
};
void __init sirfsoc_of_clk_init(void)
{
struct device_node *np;
struct resource res;
struct map_desc sirfsoc_clkc_iodesc = {
.virtual = SIRFSOC_CLOCK_VA_BASE,
.type = MT_DEVICE,
};
np = of_find_matching_node(NULL, clkc_ids);
if (!np)
panic("unable to find compatible clkc node in dtb\n");
if (of_address_to_resource(np, 0, &res))
panic("unable to find clkc range in dtb");
of_node_put(np);
sirfsoc_clkc_iodesc.pfn = __phys_to_pfn(res.start);
sirfsoc_clkc_iodesc.length = 1 + res.end - res.start;
iotable_init(&sirfsoc_clkc_iodesc, 1);
sirfsoc_clk_init();
}

1
arch/arm/mach-prima2/prima2.c
View File

@ -38,7 +38,6 @@ static const char *prima2cb_dt_match[] __initdata = {
MACHINE_START(PRIMA2_EVB, "prima2cb")
/* Maintainer: Barry Song <baohua.song@csr.com> */
.atag_offset = 0x100,
.init_early = sirfsoc_of_clk_init,
.map_io = sirfsoc_map_lluart,
.init_irq = sirfsoc_of_irq_init,
.timer = &sirfsoc_timer,

8
arch/arm/mach-prima2/timer.c
View File

@ -21,6 +21,8 @@
#include <asm/sched_clock.h>
#include <asm/mach/time.h>
#include "common.h"
#define SIRFSOC_TIMER_COUNTER_LO 0x0000
#define SIRFSOC_TIMER_COUNTER_HI 0x0004
#define SIRFSOC_TIMER_MATCH_0 0x0008
@ -188,9 +190,13 @@ static void __init sirfsoc_clockevent_init(void)
static void __init sirfsoc_timer_init(void)
{
unsigned long rate;
struct clk *clk;
/* initialize clocking early, we want to set the OS timer */
sirfsoc_of_clk_init();
/* timer's input clock is io clock */
struct clk *clk = clk_get_sys("io", NULL);
clk = clk_get_sys("io", NULL);
BUG_ON(IS_ERR(clk));

106
arch/arm/mach-realview/core.c
View File

@ -30,7 +30,6 @@
#include <linux/ata_platform.h>
#include <linux/amba/mmci.h>
#include <linux/gfp.h>
#include <linux/clkdev.h>
#include <linux/mtd/physmap.h>
#include <mach/hardware.h>
@ -226,115 +225,10 @@ struct mmci_platform_data realview_mmc1_plat_data = {
.cd_invert = true,
};
/*
* Clock handling
*/
static const struct icst_params realview_oscvco_params = {
.ref = 24000000,
.vco_max = ICST307_VCO_MAX,
.vco_min = ICST307_VCO_MIN,
.vd_min = 4 + 8,
.vd_max = 511 + 8,
.rd_min = 1 + 2,
.rd_max = 127 + 2,
.s2div = icst307_s2div,
.idx2s = icst307_idx2s,
};
static void realview_oscvco_set(struct clk *clk, struct icst_vco vco)
{
void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET;
u32 val;
val = readl(clk->vcoreg) & ~0x7ffff;
val |= vco.v | (vco.r << 9) | (vco.s << 16);
writel(0xa05f, sys_lock);
writel(val, clk->vcoreg);
writel(0, sys_lock);
}
static const struct clk_ops oscvco_clk_ops = {
.round = icst_clk_round,
.set = icst_clk_set,
.setvco = realview_oscvco_set,
};
static struct clk oscvco_clk = {
.ops = &oscvco_clk_ops,
.params = &realview_oscvco_params,
};
/*
* These are fixed clocks.
*/
static struct clk ref24_clk = {
.rate = 24000000,
};
static struct clk sp804_clk = {
.rate = 1000000,
};
static struct clk dummy_apb_pclk;
static struct clk_lookup lookups[] = {
{ /* Bus clock */
.con_id = "apb_pclk",
.clk = &dummy_apb_pclk,
}, { /* UART0 */
.dev_id = "dev:uart0",
.clk = &ref24_clk,
}, { /* UART1 */
.dev_id = "dev:uart1",
.clk = &ref24_clk,
}, { /* UART2 */
.dev_id = "dev:uart2",
.clk = &ref24_clk,
}, { /* UART3 */
.dev_id = "fpga:uart3",
.clk = &ref24_clk,
}, { /* UART3 is on the dev chip in PB1176 */
.dev_id = "dev:uart3",
.clk = &ref24_clk,
}, { /* UART4 only exists in PB1176 */
.dev_id = "fpga:uart4",
.clk = &ref24_clk,
}, { /* KMI0 */
.dev_id = "fpga:kmi0",
.clk = &ref24_clk,
}, { /* KMI1 */
.dev_id = "fpga:kmi1",
.clk = &ref24_clk,
}, { /* MMC0 */
.dev_id = "fpga:mmc0",
.clk = &ref24_clk,
}, { /* CLCD is in the PB1176 and EB DevChip */
.dev_id = "dev:clcd",
.clk = &oscvco_clk,
}, { /* PB:CLCD */
.dev_id = "issp:clcd",
.clk = &oscvco_clk,
}, { /* SSP */
.dev_id = "dev:ssp0",
.clk = &ref24_clk,
}, { /* SP804 timers */
.dev_id = "sp804",
.clk = &sp804_clk,
},
};
void __init realview_init_early(void)
{
void __iomem *sys = __io_address(REALVIEW_SYS_BASE);
if (machine_is_realview_pb1176())
oscvco_clk.vcoreg = sys + REALVIEW_SYS_OSC0_OFFSET;
else
oscvco_clk.vcoreg = sys + REALVIEW_SYS_OSC4_OFFSET;
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
versatile_sched_clock_init(sys + REALVIEW_SYS_24MHz_OFFSET, 24000000);
}

16
arch/arm/mach-realview/include/mach/clkdev.h
View File

@ -1,16 +0,0 @@
#ifndef __ASM_MACH_CLKDEV_H
#define __ASM_MACH_CLKDEV_H
#include <plat/clock.h>
struct clk {
unsigned long rate;
const struct clk_ops *ops;
const struct icst_params *params;
void __iomem *vcoreg;
};
#define __clk_get(clk) ({ 1; })
#define __clk_put(clk) do { } while (0)
#endif

2
arch/arm/mach-realview/realview_eb.c
View File

@ -27,6 +27,7 @@
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/io.h>
#include <linux/platform_data/clk-realview.h>
#include <mach/hardware.h>
#include <asm/irq.h>
@ -414,6 +415,7 @@ static void __init realview_eb_timer_init(void)
else
timer_irq = IRQ_EB_TIMER0_1;
realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
realview_timer_init(timer_irq);
realview_eb_twd_init();
}

2
arch/arm/mach-realview/realview_pb1176.c
View File

@ -29,6 +29,7 @@
#include <linux/mtd/physmap.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <linux/platform_data/clk-realview.h>
#include <mach/hardware.h>
#include <asm/irq.h>
@ -326,6 +327,7 @@ static void __init realview_pb1176_timer_init(void)
timer2_va_base = __io_address(REALVIEW_PB1176_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_PB1176_TIMER2_3_BASE) + 0x20;
realview_clk_init(__io_address(REALVIEW_SYS_BASE), true);
realview_timer_init(IRQ_DC1176_TIMER0);
}

2
arch/arm/mach-realview/realview_pb11mp.c
View File

@ -27,6 +27,7 @@
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/io.h>
#include <linux/platform_data/clk-realview.h>
#include <mach/hardware.h>
#include <asm/irq.h>
@ -312,6 +313,7 @@ static void __init realview_pb11mp_timer_init(void)
timer2_va_base = __io_address(REALVIEW_PB11MP_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_PB11MP_TIMER2_3_BASE) + 0x20;
realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
realview_timer_init(IRQ_TC11MP_TIMER0_1);
realview_pb11mp_twd_init();
}

2
arch/arm/mach-realview/realview_pba8.c
View File

@ -27,6 +27,7 @@
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/io.h>
#include <linux/platform_data/clk-realview.h>
#include <asm/irq.h>
#include <asm/leds.h>
@ -261,6 +262,7 @@ static void __init realview_pba8_timer_init(void)
timer2_va_base = __io_address(REALVIEW_PBA8_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_PBA8_TIMER2_3_BASE) + 0x20;
realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
realview_timer_init(IRQ_PBA8_TIMER0_1);
}

2
arch/arm/mach-realview/realview_pbx.c
View File

@ -26,6 +26,7 @@
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/io.h>
#include <linux/platform_data/clk-realview.h>
#include <asm/irq.h>
#include <asm/leds.h>
@ -320,6 +321,7 @@ static void __init realview_pbx_timer_init(void)
timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;
realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
realview_timer_init(IRQ_PBX_TIMER0_1);
realview_pbx_twd_init();
}

1
arch/arm/mach-ux500/Kconfig
View File

@ -11,6 +11,7 @@ config UX500_SOC_COMMON
select CACHE_L2X0
select PINCTRL
select PINCTRL_NOMADIK
select COMMON_CLK
config UX500_SOC_DB8500
bool

2
arch/arm/mach-ux500/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for the linux kernel, U8500 machine.
#
obj-y := clock.o cpu.o devices.o devices-common.o \
obj-y := cpu.o devices.o devices-common.o \
id.o usb.o timer.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o

715
arch/arm/mach-ux500/clock.c
View File

@ -1,715 +0,0 @@
/*
* Copyright (C) 2009 ST-Ericsson
* Copyright (C) 2009 STMicroelectronics
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/clkdev.h>
#include <linux/cpufreq.h>
#include <plat/mtu.h>
#include <mach/hardware.h>
#include "clock.h"
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/uaccess.h> /* for copy_from_user */
static LIST_HEAD(clk_list);
#endif
#define PRCC_PCKEN 0x00
#define PRCC_PCKDIS 0x04
#define PRCC_KCKEN 0x08
#define PRCC_KCKDIS 0x0C
#define PRCM_YYCLKEN0_MGT_SET 0x510
#define PRCM_YYCLKEN1_MGT_SET 0x514
#define PRCM_YYCLKEN0_MGT_CLR 0x518
#define PRCM_YYCLKEN1_MGT_CLR 0x51C
#define PRCM_YYCLKEN0_MGT_VAL 0x520
#define PRCM_YYCLKEN1_MGT_VAL 0x524
#define PRCM_SVAMMDSPCLK_MGT 0x008
#define PRCM_SIAMMDSPCLK_MGT 0x00C
#define PRCM_SGACLK_MGT 0x014
#define PRCM_UARTCLK_MGT 0x018
#define PRCM_MSP02CLK_MGT 0x01C
#define PRCM_MSP1CLK_MGT 0x288
#define PRCM_I2CCLK_MGT 0x020
#define PRCM_SDMMCCLK_MGT 0x024
#define PRCM_SLIMCLK_MGT 0x028
#define PRCM_PER1CLK_MGT 0x02C
#define PRCM_PER2CLK_MGT 0x030
#define PRCM_PER3CLK_MGT 0x034
#define PRCM_PER5CLK_MGT 0x038
#define PRCM_PER6CLK_MGT 0x03C
#define PRCM_PER7CLK_MGT 0x040
#define PRCM_LCDCLK_MGT 0x044
#define PRCM_BMLCLK_MGT 0x04C
#define PRCM_HSITXCLK_MGT 0x050
#define PRCM_HSIRXCLK_MGT 0x054
#define PRCM_HDMICLK_MGT 0x058
#define PRCM_APEATCLK_MGT 0x05C
#define PRCM_APETRACECLK_MGT 0x060
#define PRCM_MCDECLK_MGT 0x064
#define PRCM_IPI2CCLK_MGT 0x068
#define PRCM_DSIALTCLK_MGT 0x06C
#define PRCM_DMACLK_MGT 0x074
#define PRCM_B2R2CLK_MGT 0x078
#define PRCM_TVCLK_MGT 0x07C
#define PRCM_TCR 0x1C8
#define PRCM_TCR_STOPPED (1 << 16)
#define PRCM_TCR_DOZE_MODE (1 << 17)
#define PRCM_UNIPROCLK_MGT 0x278
#define PRCM_SSPCLK_MGT 0x280
#define PRCM_RNGCLK_MGT 0x284
#define PRCM_UICCCLK_MGT 0x27C
#define PRCM_MGT_ENABLE (1 << 8)
static DEFINE_SPINLOCK(clocks_lock);
static void __clk_enable(struct clk *clk)
{
if (clk->enabled++ == 0) {
if (clk->parent_cluster)
__clk_enable(clk->parent_cluster);
if (clk->parent_periph)
__clk_enable(clk->parent_periph);
if (clk->ops && clk->ops->enable)
clk->ops->enable(clk);
}
}
int clk_enable(struct clk *clk)
{
unsigned long flags;
spin_lock_irqsave(&clocks_lock, flags);
__clk_enable(clk);
spin_unlock_irqrestore(&clocks_lock, flags);
return 0;
}
EXPORT_SYMBOL(clk_enable);
static void __clk_disable(struct clk *clk)
{
if (--clk->enabled == 0) {
if (clk->ops && clk->ops->disable)
clk->ops->disable(clk);
if (clk->parent_periph)
__clk_disable(clk->parent_periph);
if (clk->parent_cluster)
__clk_disable(clk->parent_cluster);
}
}
void clk_disable(struct clk *clk)
{
unsigned long flags;
WARN_ON(!clk->enabled);
spin_lock_irqsave(&clocks_lock, flags);
__clk_disable(clk);
spin_unlock_irqrestore(&clocks_lock, flags);
}
EXPORT_SYMBOL(clk_disable);
/*
* The MTU has a separate, rather complex muxing setup
* with alternative parents (peripheral cluster or
* ULP or fixed 32768 Hz) depending on settings
*/
static unsigned long clk_mtu_get_rate(struct clk *clk)
{
void __iomem *addr;
u32 tcr;
int mtu = (int) clk->data;
/*
* One of these is selected eventually
* TODO: Replace the constant with a reference
* to the ULP source once this is modeled.
*/
unsigned long clk32k = 32768;
unsigned long mturate;
unsigned long retclk;
if (cpu_is_u8500_family())
addr = __io_address(U8500_PRCMU_BASE);
else
ux500_unknown_soc();
/*
* On a startup, always conifgure the TCR to the doze mode;
* bootloaders do it for us. Do this in the kernel too.
*/
writel(PRCM_TCR_DOZE_MODE, addr + PRCM_TCR);
tcr = readl(addr + PRCM_TCR);
/* Get the rate from the parent as a default */
if (clk->parent_periph)
mturate = clk_get_rate(clk->parent_periph);
else if (clk->parent_cluster)
mturate = clk_get_rate(clk->parent_cluster);
else
/* We need to be connected SOMEWHERE */
BUG();
/* Return the clock selected for this MTU */
if (tcr & (1 << mtu))
retclk = clk32k;
else
retclk = mturate;
pr_info("MTU%d clock rate: %lu Hz\n", mtu, retclk);
return retclk;
}
unsigned long clk_get_rate(struct clk *clk)
{
unsigned long rate;
/*
* If there is a custom getrate callback for this clock,
* it will take precedence.
*/
if (clk->get_rate)
return clk->get_rate(clk);
if (clk->ops && clk->ops->get_rate)
return clk->ops->get_rate(clk);
rate = clk->rate;
if (!rate) {
if (clk->parent_periph)
rate = clk_get_rate(clk->parent_periph);
else if (clk->parent_cluster)
rate = clk_get_rate(clk->parent_cluster);
}
return rate;
}
EXPORT_SYMBOL(clk_get_rate);
long clk_round_rate(struct clk *clk, unsigned long rate)
{
/*TODO*/
return rate;
}
EXPORT_SYMBOL(clk_round_rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
clk->rate = rate;
return 0;
}
EXPORT_SYMBOL(clk_set_rate);
int clk_set_parent(struct clk *clk, struct clk *parent)
{
/*TODO*/
return -ENOSYS;
}
EXPORT_SYMBOL(clk_set_parent);
static void clk_prcmu_enable(struct clk *clk)
{
void __iomem *cg_set_reg = __io_address(U8500_PRCMU_BASE)
+ PRCM_YYCLKEN0_MGT_SET + clk->prcmu_cg_off;
writel(1 << clk->prcmu_cg_bit, cg_set_reg);
}
static void clk_prcmu_disable(struct clk *clk)
{
void __iomem *cg_clr_reg = __io_address(U8500_PRCMU_BASE)
+ PRCM_YYCLKEN0_MGT_CLR + clk->prcmu_cg_off;
writel(1 << clk->prcmu_cg_bit, cg_clr_reg);
}
static struct clkops clk_prcmu_ops = {
.enable = clk_prcmu_enable,
.disable = clk_prcmu_disable,
};
static unsigned int clkrst_base[] = {
[1] = U8500_CLKRST1_BASE,
[2] = U8500_CLKRST2_BASE,
[3] = U8500_CLKRST3_BASE,
[5] = U8500_CLKRST5_BASE,
[6] = U8500_CLKRST6_BASE,
};
static void clk_prcc_enable(struct clk *clk)
{
void __iomem *addr = __io_address(clkrst_base[clk->cluster]);
if (clk->prcc_kernel != -1)
writel(1 << clk->prcc_kernel, addr + PRCC_KCKEN);
if (clk->prcc_bus != -1)
writel(1 << clk->prcc_bus, addr + PRCC_PCKEN);
}
static void clk_prcc_disable(struct clk *clk)
{
void __iomem *addr = __io_address(clkrst_base[clk->cluster]);
if (clk->prcc_bus != -1)
writel(1 << clk->prcc_bus, addr + PRCC_PCKDIS);
if (clk->prcc_kernel != -1)
writel(1 << clk->prcc_kernel, addr + PRCC_KCKDIS);
}
static struct clkops clk_prcc_ops = {
.enable = clk_prcc_enable,
.disable = clk_prcc_disable,
};
static struct clk clk_32khz = {
.name = "clk_32khz",
.rate = 32000,
};
/*
* PRCMU level clock gating
*/
/* Bank 0 */
static DEFINE_PRCMU_CLK(svaclk, 0x0, 2, SVAMMDSPCLK);
static DEFINE_PRCMU_CLK(siaclk, 0x0, 3, SIAMMDSPCLK);
static DEFINE_PRCMU_CLK(sgaclk, 0x0, 4, SGACLK);
static DEFINE_PRCMU_CLK_RATE(uartclk, 0x0, 5, UARTCLK, 38400000);
static DEFINE_PRCMU_CLK(msp02clk, 0x0, 6, MSP02CLK);
static DEFINE_PRCMU_CLK(msp1clk, 0x0, 7, MSP1CLK); /* v1 */
static DEFINE_PRCMU_CLK_RATE(i2cclk, 0x0, 8, I2CCLK, 48000000);
static DEFINE_PRCMU_CLK_RATE(sdmmcclk, 0x0, 9, SDMMCCLK, 100000000);
static DEFINE_PRCMU_CLK(slimclk, 0x0, 10, SLIMCLK);
static DEFINE_PRCMU_CLK(per1clk, 0x0, 11, PER1CLK);
static DEFINE_PRCMU_CLK(per2clk, 0x0, 12, PER2CLK);
static DEFINE_PRCMU_CLK(per3clk, 0x0, 13, PER3CLK);
static DEFINE_PRCMU_CLK(per5clk, 0x0, 14, PER5CLK);
static DEFINE_PRCMU_CLK_RATE(per6clk, 0x0, 15, PER6CLK, 133330000);
static DEFINE_PRCMU_CLK(lcdclk, 0x0, 17, LCDCLK);
static DEFINE_PRCMU_CLK(bmlclk, 0x0, 18, BMLCLK);
static DEFINE_PRCMU_CLK(hsitxclk, 0x0, 19, HSITXCLK);
static DEFINE_PRCMU_CLK(hsirxclk, 0x0, 20, HSIRXCLK);
static DEFINE_PRCMU_CLK(hdmiclk, 0x0, 21, HDMICLK);
static DEFINE_PRCMU_CLK(apeatclk, 0x0, 22, APEATCLK);
static DEFINE_PRCMU_CLK(apetraceclk, 0x0, 23, APETRACECLK);
static DEFINE_PRCMU_CLK(mcdeclk, 0x0, 24, MCDECLK);
static DEFINE_PRCMU_CLK(ipi2clk, 0x0, 25, IPI2CCLK);
static DEFINE_PRCMU_CLK(dsialtclk, 0x0, 26, DSIALTCLK); /* v1 */
static DEFINE_PRCMU_CLK(dmaclk, 0x0, 27, DMACLK);
static DEFINE_PRCMU_CLK(b2r2clk, 0x0, 28, B2R2CLK);
static DEFINE_PRCMU_CLK(tvclk, 0x0, 29, TVCLK);
static DEFINE_PRCMU_CLK(uniproclk, 0x0, 30, UNIPROCLK); /* v1 */
static DEFINE_PRCMU_CLK_RATE(sspclk, 0x0, 31, SSPCLK, 48000000); /* v1 */
/* Bank 1 */
static DEFINE_PRCMU_CLK(rngclk, 0x4, 0, RNGCLK); /* v1 */
static DEFINE_PRCMU_CLK(uiccclk, 0x4, 1, UICCCLK); /* v1 */
/*
* PRCC level clock gating
* Format: per#, clk, PCKEN bit, KCKEN bit, parent
*/
/* Peripheral Cluster #1 */
static DEFINE_PRCC_CLK(1, msp3, 11, 10, &clk_msp1clk);
static DEFINE_PRCC_CLK(1, i2c4, 10, 9, &clk_i2cclk);
static DEFINE_PRCC_CLK(1, gpio0, 9, -1, NULL);
static DEFINE_PRCC_CLK(1, slimbus0, 8, 8, &clk_slimclk);
static DEFINE_PRCC_CLK(1, spi3, 7, -1, NULL);
static DEFINE_PRCC_CLK(1, i2c2, 6, 6, &clk_i2cclk);
static DEFINE_PRCC_CLK(1, sdi0, 5, 5, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(1, msp1, 4, 4, &clk_msp1clk);
static DEFINE_PRCC_CLK(1, msp0, 3, 3, &clk_msp02clk);
static DEFINE_PRCC_CLK(1, i2c1, 2, 2, &clk_i2cclk);
static DEFINE_PRCC_CLK(1, uart1, 1, 1, &clk_uartclk);
static DEFINE_PRCC_CLK(1, uart0, 0, 0, &clk_uartclk);
/* Peripheral Cluster #2 */
static DEFINE_PRCC_CLK(2, gpio1, 11, -1, NULL);
static DEFINE_PRCC_CLK(2, ssitx, 10, 7, NULL);
static DEFINE_PRCC_CLK(2, ssirx, 9, 6, NULL);
static DEFINE_PRCC_CLK(2, spi0, 8, -1, NULL);
static DEFINE_PRCC_CLK(2, sdi3, 7, 5, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(2, sdi1, 6, 4, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(2, msp2, 5, 3, &clk_msp02clk);
static DEFINE_PRCC_CLK(2, sdi4, 4, 2, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(2, pwl, 3, 1, NULL);
static DEFINE_PRCC_CLK(2, spi1, 2, -1, NULL);
static DEFINE_PRCC_CLK(2, spi2, 1, -1, NULL);
static DEFINE_PRCC_CLK(2, i2c3, 0, 0, &clk_i2cclk);
/* Peripheral Cluster #3 */
static DEFINE_PRCC_CLK(3, gpio2, 8, -1, NULL);
static DEFINE_PRCC_CLK(3, sdi5, 7, 7, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(3, uart2, 6, 6, &clk_uartclk);
static DEFINE_PRCC_CLK(3, ske, 5, 5, &clk_32khz);
static DEFINE_PRCC_CLK(3, sdi2, 4, 4, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(3, i2c0, 3, 3, &clk_i2cclk);
static DEFINE_PRCC_CLK(3, ssp1, 2, 2, &clk_sspclk);
static DEFINE_PRCC_CLK(3, ssp0, 1, 1, &clk_sspclk);
static DEFINE_PRCC_CLK(3, fsmc, 0, -1, NULL);
/* Peripheral Cluster #4 is in the always on domain */
/* Peripheral Cluster #5 */
static DEFINE_PRCC_CLK(5, gpio3, 1, -1, NULL);
static DEFINE_PRCC_CLK(5, usb, 0, 0, NULL);
/* Peripheral Cluster #6 */
/* MTU ID in data */
static DEFINE_PRCC_CLK_CUSTOM(6, mtu1, 9, -1, NULL, clk_mtu_get_rate, 1);
static DEFINE_PRCC_CLK_CUSTOM(6, mtu0, 8, -1, NULL, clk_mtu_get_rate, 0);
static DEFINE_PRCC_CLK(6, cfgreg, 7, 7, NULL);
static DEFINE_PRCC_CLK(6, hash1, 6, -1, NULL);
static DEFINE_PRCC_CLK(6, unipro, 5, 1, &clk_uniproclk);
static DEFINE_PRCC_CLK(6, pka, 4, -1, NULL);
static DEFINE_PRCC_CLK(6, hash0, 3, -1, NULL);
static DEFINE_PRCC_CLK(6, cryp0, 2, -1, NULL);
static DEFINE_PRCC_CLK(6, cryp1, 1, -1, NULL);
static DEFINE_PRCC_CLK(6, rng, 0, 0, &clk_rngclk);
static struct clk clk_dummy_apb_pclk = {
.name = "apb_pclk",
};
static struct clk_lookup u8500_clks[] = {
CLK(dummy_apb_pclk, NULL, "apb_pclk"),
/* Peripheral Cluster #1 */
CLK(gpio0, "gpio.0", NULL),
CLK(gpio0, "gpio.1", NULL),
CLK(slimbus0, "slimbus0", NULL),
CLK(i2c2, "nmk-i2c.2", NULL),
CLK(sdi0, "sdi0", NULL),
CLK(msp0, "ux500-msp-i2s.0", NULL),
CLK(i2c1, "nmk-i2c.1", NULL),
CLK(uart1, "uart1", NULL),
CLK(uart0, "uart0", NULL),
/* Peripheral Cluster #3 */
CLK(gpio2, "gpio.2", NULL),
CLK(gpio2, "gpio.3", NULL),
CLK(gpio2, "gpio.4", NULL),
CLK(gpio2, "gpio.5", NULL),
CLK(sdi5, "sdi5", NULL),
CLK(uart2, "uart2", NULL),
CLK(ske, "ske", NULL),
CLK(ske, "nmk-ske-keypad", NULL),
CLK(sdi2, "sdi2", NULL),
CLK(i2c0, "nmk-i2c.0", NULL),
CLK(fsmc, "fsmc", NULL),
/* Peripheral Cluster #5 */
CLK(gpio3, "gpio.8", NULL),
/* Peripheral Cluster #6 */
CLK(hash1, "hash1", NULL),
CLK(pka, "pka", NULL),
CLK(hash0, "hash0", NULL),
CLK(cryp0, "cryp0", NULL),
CLK(cryp1, "cryp1", NULL),
/* PRCMU level clock gating */
/* Bank 0 */
CLK(svaclk, "sva", NULL),
CLK(siaclk, "sia", NULL),
CLK(sgaclk, "sga", NULL),
CLK(slimclk, "slim", NULL),
CLK(lcdclk, "lcd", NULL),
CLK(bmlclk, "bml", NULL),
CLK(hsitxclk, "stm-hsi.0", NULL),
CLK(hsirxclk, "stm-hsi.1", NULL),
CLK(hdmiclk, "hdmi", NULL),
CLK(apeatclk, "apeat", NULL),
CLK(apetraceclk, "apetrace", NULL),
CLK(mcdeclk, "mcde", NULL),
CLK(ipi2clk, "ipi2", NULL),
CLK(dmaclk, "dma40.0", NULL),
CLK(b2r2clk, "b2r2", NULL),
CLK(tvclk, "tv", NULL),
/* Peripheral Cluster #1 */
CLK(i2c4, "nmk-i2c.4", NULL),
CLK(spi3, "spi3", NULL),
CLK(msp1, "ux500-msp-i2s.1", NULL),
CLK(msp3, "ux500-msp-i2s.3", NULL),
/* Peripheral Cluster #2 */
CLK(gpio1, "gpio.6", NULL),
CLK(gpio1, "gpio.7", NULL),
CLK(ssitx, "ssitx", NULL),
CLK(ssirx, "ssirx", NULL),
CLK(spi0, "spi0", NULL),
CLK(sdi3, "sdi3", NULL),
CLK(sdi1, "sdi1", NULL),
CLK(msp2, "ux500-msp-i2s.2", NULL),
CLK(sdi4, "sdi4", NULL),
CLK(pwl, "pwl", NULL),
CLK(spi1, "spi1", NULL),
CLK(spi2, "spi2", NULL),
CLK(i2c3, "nmk-i2c.3", NULL),
/* Peripheral Cluster #3 */
CLK(ssp1, "ssp1", NULL),
CLK(ssp0, "ssp0", NULL),
/* Peripheral Cluster #5 */
CLK(usb, "musb-ux500.0", "usb"),
/* Peripheral Cluster #6 */
CLK(mtu1, "mtu1", NULL),
CLK(mtu0, "mtu0", NULL),
CLK(cfgreg, "cfgreg", NULL),
CLK(hash1, "hash1", NULL),
CLK(unipro, "unipro", NULL),
CLK(rng, "rng", NULL),
/* PRCMU level clock gating */
/* Bank 0 */
CLK(uniproclk, "uniproclk", NULL),
CLK(dsialtclk, "dsialt", NULL),
/* Bank 1 */
CLK(rngclk, "rng", NULL),
CLK(uiccclk, "uicc", NULL),
};
#ifdef CONFIG_DEBUG_FS
/*
* debugfs support to trace clock tree hierarchy and attributes with
* powerdebug
*/
static struct dentry *clk_debugfs_root;
void __init clk_debugfs_add_table(struct clk_lookup *cl, size_t num)
{
while (num--) {
/* Check that the clock has not been already registered */
if (!(cl->clk->list.prev != cl->clk->list.next))
list_add_tail(&cl->clk->list, &clk_list);
cl++;
}
}
static ssize_t usecount_dbg_read(struct file *file, char __user *buf,
size_t size, loff_t *off)
{
struct clk *clk = file->f_dentry->d_inode->i_private;
char cusecount[128];
unsigned int len;
len = sprintf(cusecount, "%u\n", clk->enabled);
return simple_read_from_buffer(buf, size, off, cusecount, len);
}
static ssize_t rate_dbg_read(struct file *file, char __user *buf,
size_t size, loff_t *off)
{
struct clk *clk = file->f_dentry->d_inode->i_private;
char crate[128];
unsigned int rate;
unsigned int len;
rate = clk_get_rate(clk);
len = sprintf(crate, "%u\n", rate);
return simple_read_from_buffer(buf, size, off, crate, len);
}
static const struct file_operations usecount_fops = {
.read = usecount_dbg_read,
};
static const struct file_operations set_rate_fops = {
.read = rate_dbg_read,
};
static struct dentry *clk_debugfs_register_dir(struct clk *c,
struct dentry *p_dentry)
{
struct dentry *d, *clk_d;
const char *p = c->name;
if (!p)
p = "BUG";
clk_d = debugfs_create_dir(p, p_dentry);
if (!clk_d)
return NULL;
d = debugfs_create_file("usecount", S_IRUGO,
clk_d, c, &usecount_fops);
if (!d)
goto err_out;
d = debugfs_create_file("rate", S_IRUGO,
clk_d, c, &set_rate_fops);
if (!d)
goto err_out;
/*
* TODO : not currently available in ux500
* d = debugfs_create_x32("flags", S_IRUGO, clk_d, (u32 *)&c->flags);
* if (!d)
* goto err_out;
*/
return clk_d;
err_out:
debugfs_remove_recursive(clk_d);
return NULL;
}
static int clk_debugfs_register_one(struct clk *c)
{
struct clk *pa = c->parent_periph;
struct clk *bpa = c->parent_cluster;
if (!(bpa && !pa)) {
c->dent = clk_debugfs_register_dir(c,
pa ? pa->dent : clk_debugfs_root);
if (!c->dent)
return -ENOMEM;
}
if (bpa) {
c->dent_bus = clk_debugfs_register_dir(c,
bpa->dent_bus ? bpa->dent_bus : bpa->dent);
if ((!c->dent_bus) && (c->dent)) {
debugfs_remove_recursive(c->dent);
c->dent = NULL;
return -ENOMEM;
}
}
return 0;
}
static int clk_debugfs_register(struct clk *c)
{
int err;
struct clk *pa = c->parent_periph;
struct clk *bpa = c->parent_cluster;
if (pa && (!pa->dent && !pa->dent_bus)) {
err = clk_debugfs_register(pa);
if (err)
return err;
}
if (bpa && (!bpa->dent && !bpa->dent_bus)) {
err = clk_debugfs_register(bpa);
if (err)
return err;
}
if ((!c->dent) && (!c->dent_bus)) {
err = clk_debugfs_register_one(c);
if (err)
return err;
}
return 0;
}
int __init clk_debugfs_init(void)
{
struct clk *c;
struct dentry *d;
int err;
d = debugfs_create_dir("clock", NULL);
if (!d)
return -ENOMEM;
clk_debugfs_root = d;
list_for_each_entry(c, &clk_list, list) {
err = clk_debugfs_register(c);
if (err)
goto err_out;
}
return 0;
err_out:
debugfs_remove_recursive(clk_debugfs_root);
return err;
}
#endif /* defined(CONFIG_DEBUG_FS) */
unsigned long clk_smp_twd_rate = 500000000;
unsigned long clk_smp_twd_get_rate(struct clk *clk)
{
return clk_smp_twd_rate;
}
static struct clk clk_smp_twd = {
.get_rate = clk_smp_twd_get_rate,
.name = "smp_twd",
};
static struct clk_lookup clk_smp_twd_lookup = {
.dev_id = "smp_twd",
.clk = &clk_smp_twd,
};
#ifdef CONFIG_CPU_FREQ
static int clk_twd_cpufreq_transition(struct notifier_block *nb,
unsigned long state, void *data)
{
struct cpufreq_freqs *f = data;
if (state == CPUFREQ_PRECHANGE) {
/* Save frequency in simple Hz */
clk_smp_twd_rate = (f->new * 1000) / 2;
}
return NOTIFY_OK;
}
static struct notifier_block clk_twd_cpufreq_nb = {
.notifier_call = clk_twd_cpufreq_transition,
};
int clk_init_smp_twd_cpufreq(void)
{
return cpufreq_register_notifier(&clk_twd_cpufreq_nb,
CPUFREQ_TRANSITION_NOTIFIER);
}
#endif
int __init clk_init(void)
{
clkdev_add_table(u8500_clks, ARRAY_SIZE(u8500_clks));
clkdev_add(&clk_smp_twd_lookup);
#ifdef CONFIG_DEBUG_FS
clk_debugfs_add_table(u8500_clks, ARRAY_SIZE(u8500_clks));
#endif
return 0;
}

164
arch/arm/mach-ux500/clock.h
View File

@ -1,164 +0,0 @@
/*
* Copyright (C) 2010 ST-Ericsson
* Copyright (C) 2009 STMicroelectronics
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/**
* struct clkops - ux500 clock operations
* @enable: function to enable the clock
* @disable: function to disable the clock
* @get_rate: function to get the current clock rate
*
* This structure contains function pointers to functions that will be used to
* control the clock. All of these functions are optional. If get_rate is
* NULL, the rate in the struct clk will be used.
*/
struct clkops {
void (*enable) (struct clk *);
void (*disable) (struct clk *);
unsigned long (*get_rate) (struct clk *);
int (*set_parent)(struct clk *, struct clk *);
};
/**
* struct clk - ux500 clock structure
* @ops: pointer to clkops struct used to control this clock
* @name: name, for debugging
* @enabled: refcount. positive if enabled, zero if disabled
* @get_rate: custom callback for getting the clock rate
* @data: custom per-clock data for example for the get_rate
* callback
* @rate: fixed rate for clocks which don't implement
* ops->getrate
* @prcmu_cg_off: address offset of the combined enable/disable register
* (used on u8500v1)
* @prcmu_cg_bit: bit in the combined enable/disable register (used on
* u8500v1)
* @prcmu_cg_mgt: address of the enable/disable register (used on
* u8500ed)
* @cluster: peripheral cluster number
* @prcc_bus: bit for the bus clock in the peripheral's CLKRST
* @prcc_kernel: bit for the kernel clock in the peripheral's CLKRST.
* -1 if no kernel clock exists.
* @parent_cluster: pointer to parent's cluster clk struct
* @parent_periph: pointer to parent's peripheral clk struct
*
* Peripherals are organised into clusters, and each cluster has an associated
* bus clock. Some peripherals also have a parent peripheral clock.
*
* In order to enable a clock for a peripheral, we need to enable:
* (1) the parent cluster (bus) clock at the PRCMU level
* (2) the parent peripheral clock (if any) at the PRCMU level
* (3) the peripheral's bus & kernel clock at the PRCC level
*
* (1) and (2) are handled by defining clk structs (DEFINE_PRCMU_CLK) for each
* of the cluster and peripheral clocks, and hooking these as the parents of
* the individual peripheral clocks.
*
* (3) is handled by specifying the bits in the PRCC control registers required
* to enable these clocks and modifying them in the ->enable and
* ->disable callbacks of the peripheral clocks (DEFINE_PRCC_CLK).
*
* This structure describes both the PRCMU-level clocks and PRCC-level clocks.
* The prcmu_* fields are only used for the PRCMU clocks, and the cluster,
* prcc, and parent pointers are only used for the PRCC-level clocks.
*/
struct clk {
const struct clkops *ops;
const char *name;
unsigned int enabled;
unsigned long (*get_rate)(struct clk *);
void *data;
unsigned long rate;
struct list_head list;
/* These three are only for PRCMU clks */
unsigned int prcmu_cg_off;
unsigned int prcmu_cg_bit;
unsigned int prcmu_cg_mgt;
/* The rest are only for PRCC clks */
int cluster;
unsigned int prcc_bus;
unsigned int prcc_kernel;
struct clk *parent_cluster;
struct clk *parent_periph;
#if defined(CONFIG_DEBUG_FS)
struct dentry *dent; /* For visible tree hierarchy */
struct dentry *dent_bus; /* For visible tree hierarchy */
#endif
};
#define DEFINE_PRCMU_CLK(_name, _cg_off, _cg_bit, _reg) \
struct clk clk_##_name = { \
.name = #_name, \
.ops = &clk_prcmu_ops, \
.prcmu_cg_off = _cg_off, \
.prcmu_cg_bit = _cg_bit, \
.prcmu_cg_mgt = PRCM_##_reg##_MGT \
}
#define DEFINE_PRCMU_CLK_RATE(_name, _cg_off, _cg_bit, _reg, _rate) \
struct clk clk_##_name = { \
.name = #_name, \
.ops = &clk_prcmu_ops, \
.prcmu_cg_off = _cg_off, \
.prcmu_cg_bit = _cg_bit, \
.rate = _rate, \
.prcmu_cg_mgt = PRCM_##_reg##_MGT \
}
#define DEFINE_PRCC_CLK(_pclust, _name, _bus_en, _kernel_en, _kernclk) \
struct clk clk_##_name = { \
.name = #_name, \
.ops = &clk_prcc_ops, \
.cluster = _pclust, \
.prcc_bus = _bus_en, \
.prcc_kernel = _kernel_en, \
.parent_cluster = &clk_per##_pclust##clk, \
.parent_periph = _kernclk \
}
#define DEFINE_PRCC_CLK_CUSTOM(_pclust, _name, _bus_en, _kernel_en, _kernclk, _callback, _data) \
struct clk clk_##_name = { \
.name = #_name, \
.ops = &clk_prcc_ops, \
.cluster = _pclust, \
.prcc_bus = _bus_en, \
.prcc_kernel = _kernel_en, \
.parent_cluster = &clk_per##_pclust##clk, \
.parent_periph = _kernclk, \
.get_rate = _callback, \
.data = (void *) _data \
}
#define CLK(_clk, _devname, _conname) \
{ \
.clk = &clk_##_clk, \
.dev_id = _devname, \
.con_id = _conname, \
}
int __init clk_db8500_ed_fixup(void);
int __init clk_init(void);
#ifdef CONFIG_DEBUG_FS
int clk_debugfs_init(void);
#else
static inline int clk_debugfs_init(void) { return 0; }
#endif
#ifdef CONFIG_CPU_FREQ
int clk_init_smp_twd_cpufreq(void);
#else
static inline int clk_init_smp_twd_cpufreq(void) { return 0; }
#endif

14
arch/arm/mach-ux500/cpu.c
View File

@ -8,7 +8,6 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/mfd/db8500-prcmu.h>
#include <linux/clksrc-dbx500-prcmu.h>
#include <linux/sys_soc.h>
@ -17,6 +16,7 @@
#include <linux/stat.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/platform_data/clk-ux500.h>
#include <asm/hardware/gic.h>
#include <asm/mach/map.h>
@ -25,8 +25,6 @@
#include <mach/setup.h>
#include <mach/devices.h>
#include "clock.h"
void __iomem *_PRCMU_BASE;
/*
@ -70,13 +68,17 @@ void __init ux500_init_irq(void)
*/
if (cpu_is_u8500_family())
db8500_prcmu_early_init();
clk_init();
if (cpu_is_u8500_family())
u8500_clk_init();
else if (cpu_is_u9540())
u9540_clk_init();
else if (cpu_is_u8540())
u8540_clk_init();
}
void __init ux500_init_late(void)
{
clk_debugfs_init();
clk_init_smp_twd_cpufreq();
}
static const char * __init ux500_get_machine(void)

13
drivers/clk/Kconfig
View File

@ -40,4 +40,17 @@ config COMMON_CLK_WM831X
Supports the clocking subsystem of the WM831x/2x series of
PMICs from Wolfson Microlectronics.
config COMMON_CLK_VERSATILE
bool "Clock driver for ARM Reference designs"
depends on ARCH_INTEGRATOR || ARCH_REALVIEW
---help---
Supports clocking on ARM Reference designs Integrator/AP,
Integrator/CP, RealView PB1176, EB, PB11MP and PBX.
config COMMON_CLK_MAX77686
tristate "Clock driver for Maxim 77686 MFD"
depends on MFD_MAX77686
---help---
This driver supports Maxim 77686 crystal oscillator clock.
endmenu

9
drivers/clk/Makefile
View File

@ -10,7 +10,14 @@ obj-$(CONFIG_ARCH_MXS) += mxs/
obj-$(CONFIG_ARCH_SOCFPGA) += socfpga/
obj-$(CONFIG_PLAT_SPEAR) += spear/
obj-$(CONFIG_ARCH_U300) += clk-u300.o
obj-$(CONFIG_ARCH_INTEGRATOR) += versatile/
obj-$(CONFIG_COMMON_CLK_VERSATILE) += versatile/
obj-$(CONFIG_ARCH_PRIMA2) += clk-prima2.o
ifeq ($(CONFIG_COMMON_CLK), y)
obj-$(CONFIG_ARCH_MMP) += mmp/
endif
obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o
obj-$(CONFIG_ARCH_U8500) += ux500/
# Chip specific
obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o
obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o

111
drivers/clk/clk-ls1x.c Normal file
View File

@ -0,0 +1,111 @@
/*
* Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <loongson1.h>
#define OSC 33
static DEFINE_SPINLOCK(_lock);
static int ls1x_pll_clk_enable(struct clk_hw *hw)
{
return 0;
}
static void ls1x_pll_clk_disable(struct clk_hw *hw)
{
}
static unsigned long ls1x_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
u32 pll, rate;
pll = __raw_readl(LS1X_CLK_PLL_FREQ);
rate = ((12 + (pll & 0x3f)) * 1000000) +
((((pll >> 8) & 0x3ff) * 1000000) >> 10);
rate *= OSC;
rate >>= 1;
return rate;
}
static const struct clk_ops ls1x_pll_clk_ops = {
.enable = ls1x_pll_clk_enable,
.disable = ls1x_pll_clk_disable,
.recalc_rate = ls1x_pll_recalc_rate,
};
static struct clk * __init clk_register_pll(struct device *dev,
const char *name, const char *parent_name, unsigned long flags)
{
struct clk_hw *hw;
struct clk *clk;
struct clk_init_data init;
/* allocate the divider */
hw = kzalloc(sizeof(struct clk_hw), GFP_KERNEL);
if (!hw) {
pr_err("%s: could not allocate clk_hw\n", __func__);
return ERR_PTR(-ENOMEM);
}
init.name = name;
init.ops = &ls1x_pll_clk_ops;
init.flags = flags | CLK_IS_BASIC;
init.parent_names = (parent_name ? &parent_name : NULL);
init.num_parents = (parent_name ? 1 : 0);
hw->init = &init;
/* register the clock */
clk = clk_register(dev, hw);
if (IS_ERR(clk))
kfree(hw);
return clk;
}
void __init ls1x_clk_init(void)
{
struct clk *clk;
clk = clk_register_pll(NULL, "pll_clk", NULL, CLK_IS_ROOT);
clk_prepare_enable(clk);
clk = clk_register_divider(NULL, "cpu_clk", "pll_clk",
CLK_SET_RATE_PARENT, LS1X_CLK_PLL_DIV, DIV_CPU_SHIFT,
DIV_CPU_WIDTH, CLK_DIVIDER_ONE_BASED, &_lock);
clk_prepare_enable(clk);
clk_register_clkdev(clk, "cpu", NULL);
clk = clk_register_divider(NULL, "dc_clk", "pll_clk",
CLK_SET_RATE_PARENT, LS1X_CLK_PLL_DIV, DIV_DC_SHIFT,
DIV_DC_WIDTH, CLK_DIVIDER_ONE_BASED, &_lock);
clk_prepare_enable(clk);
clk_register_clkdev(clk, "dc", NULL);
clk = clk_register_divider(NULL, "ahb_clk", "pll_clk",
CLK_SET_RATE_PARENT, LS1X_CLK_PLL_DIV, DIV_DDR_SHIFT,
DIV_DDR_WIDTH, CLK_DIVIDER_ONE_BASED, &_lock);
clk_prepare_enable(clk);
clk_register_clkdev(clk, "ahb", NULL);
clk_register_clkdev(clk, "stmmaceth", NULL);
clk = clk_register_fixed_factor(NULL, "apb_clk", "ahb_clk", 0, 1, 2);
clk_prepare_enable(clk);
clk_register_clkdev(clk, "apb", NULL);
clk_register_clkdev(clk, "serial8250", NULL);
}

244
drivers/clk/clk-max77686.c Normal file
View File

@ -0,0 +1,244 @@
/*
* clk-max77686.c - Clock driver for Maxim 77686
*
* Copyright (C) 2012 Samsung Electornics
* Jonghwa Lee <jonghwa3.lee@samsung.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
#include <linux/clk-provider.h>
#include <linux/mutex.h>
#include <linux/clkdev.h>
enum {
MAX77686_CLK_AP = 0,
MAX77686_CLK_CP,
MAX77686_CLK_PMIC,
MAX77686_CLKS_NUM,
};
struct max77686_clk {
struct max77686_dev *iodev;
u32 mask;
struct clk_hw hw;
struct clk_lookup *lookup;
};
static struct max77686_clk *get_max77686_clk(struct clk_hw *hw)
{
return container_of(hw, struct max77686_clk, hw);
}
static int max77686_clk_prepare(struct clk_hw *hw)
{
struct max77686_clk *max77686;
int ret;
max77686 = get_max77686_clk(hw);
if (!max77686)
return -ENOMEM;
ret = regmap_update_bits(max77686->iodev->regmap,
MAX77686_REG_32KHZ, max77686->mask, max77686->mask);
return ret;
}
static void max77686_clk_unprepare(struct clk_hw *hw)
{
struct max77686_clk *max77686;
max77686 = get_max77686_clk(hw);
if (!max77686)
return;
regmap_update_bits(max77686->iodev->regmap,
MAX77686_REG_32KHZ, max77686->mask, ~max77686->mask);
}
static int max77686_clk_is_enabled(struct clk_hw *hw)
{
struct max77686_clk *max77686;
int ret;
u32 val;
max77686 = get_max77686_clk(hw);
if (!max77686)
return -ENOMEM;
ret = regmap_read(max77686->iodev->regmap,
MAX77686_REG_32KHZ, &val);
if (ret < 0)
return -EINVAL;
return val & max77686->mask;
}
static struct clk_ops max77686_clk_ops = {
.prepare = max77686_clk_prepare,
.unprepare = max77686_clk_unprepare,
.is_enabled = max77686_clk_is_enabled,
};
static struct clk_init_data max77686_clks_init[MAX77686_CLKS_NUM] = {
[MAX77686_CLK_AP] = {
.name = "32khz_ap",
.ops = &max77686_clk_ops,
.flags = CLK_IS_ROOT,
},
[MAX77686_CLK_CP] = {
.name = "32khz_cp",
.ops = &max77686_clk_ops,
.flags = CLK_IS_ROOT,
},
[MAX77686_CLK_PMIC] = {
.name = "32khz_pmic",
.ops = &max77686_clk_ops,
.flags = CLK_IS_ROOT,
},
};
static int max77686_clk_register(struct device *dev,
struct max77686_clk *max77686)
{
struct clk *clk;
struct clk_hw *hw = &max77686->hw;
clk = clk_register(dev, hw);
if (IS_ERR(clk))
return -ENOMEM;
max77686->lookup = devm_kzalloc(dev, sizeof(struct clk_lookup),
GFP_KERNEL);
if (IS_ERR(max77686->lookup))
return -ENOMEM;
max77686->lookup->con_id = hw->init->name;
max77686->lookup->clk = clk;
clkdev_add(max77686->lookup);
return 0;
}
static __devinit int max77686_clk_probe(struct platform_device *pdev)
{
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct max77686_clk **max77686_clks;
int i, ret;
max77686_clks = devm_kzalloc(&pdev->dev, sizeof(struct max77686_clk *)
* MAX77686_CLKS_NUM, GFP_KERNEL);
if (IS_ERR(max77686_clks))
return -ENOMEM;
for (i = 0; i < MAX77686_CLKS_NUM; i++) {
max77686_clks[i] = devm_kzalloc(&pdev->dev,
sizeof(struct max77686_clk), GFP_KERNEL);
if (IS_ERR(max77686_clks[i]))
return -ENOMEM;
}
for (i = 0; i < MAX77686_CLKS_NUM; i++) {
max77686_clks[i]->iodev = iodev;
max77686_clks[i]->mask = 1 << i;
max77686_clks[i]->hw.init = &max77686_clks_init[i];
ret = max77686_clk_register(&pdev->dev, max77686_clks[i]);
if (ret) {
switch (i) {
case MAX77686_CLK_AP:
dev_err(&pdev->dev, "Fail to register CLK_AP\n");
goto err_clk_ap;
break;
case MAX77686_CLK_CP:
dev_err(&pdev->dev, "Fail to register CLK_CP\n");
goto err_clk_cp;
break;
case MAX77686_CLK_PMIC:
dev_err(&pdev->dev, "Fail to register CLK_PMIC\n");
goto err_clk_pmic;
}
}
}
platform_set_drvdata(pdev, max77686_clks);
goto out;
err_clk_pmic:
clkdev_drop(max77686_clks[MAX77686_CLK_CP]->lookup);
kfree(max77686_clks[MAX77686_CLK_CP]->hw.clk);
err_clk_cp:
clkdev_drop(max77686_clks[MAX77686_CLK_AP]->lookup);
kfree(max77686_clks[MAX77686_CLK_AP]->hw.clk);
err_clk_ap:
out:
return ret;
}
static int __devexit max77686_clk_remove(struct platform_device *pdev)
{
struct max77686_clk **max77686_clks = platform_get_drvdata(pdev);
int i;
for (i = 0; i < MAX77686_CLKS_NUM; i++) {
clkdev_drop(max77686_clks[i]->lookup);
kfree(max77686_clks[i]->hw.clk);
}
return 0;
}
static const struct platform_device_id max77686_clk_id[] = {
{ "max77686-clk", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, max77686_clk_id);
static struct platform_driver max77686_clk_driver = {
.driver = {
.name = "max77686-clk",
.owner = THIS_MODULE,
},
.probe = max77686_clk_probe,
.remove = __devexit_p(max77686_clk_remove),
.id_table = max77686_clk_id,
};
static int __init max77686_clk_init(void)
{
return platform_driver_register(&max77686_clk_driver);
}
subsys_initcall(max77686_clk_init);
static void __init max77686_clk_cleanup(void)
{
platform_driver_unregister(&max77686_clk_driver);
}
module_exit(max77686_clk_cleanup);
MODULE_DESCRIPTION("MAXIM 77686 Clock Driver");
MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
MODULE_LICENSE("GPL");

1171
drivers/clk/clk-prima2.c Normal file
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File diff suppressed because it is too large Load Diff

57
drivers/clk/clk.c
View File

@ -557,25 +557,6 @@ int clk_enable(struct clk *clk)
}
EXPORT_SYMBOL_GPL(clk_enable);
/**
* clk_get_rate - return the rate of clk
* @clk: the clk whose rate is being returned
*
* Simply returns the cached rate of the clk. Does not query the hardware. If
* clk is NULL then returns 0.
*/
unsigned long clk_get_rate(struct clk *clk)
{
unsigned long rate;
mutex_lock(&prepare_lock);
rate = __clk_get_rate(clk);
mutex_unlock(&prepare_lock);
return rate;
}
EXPORT_SYMBOL_GPL(clk_get_rate);
/**
* __clk_round_rate - round the given rate for a clk
* @clk: round the rate of this clock
@ -701,6 +682,30 @@ static void __clk_recalc_rates(struct clk *clk, unsigned long msg)
__clk_recalc_rates(child, msg);
}
/**
* clk_get_rate - return the rate of clk
* @clk: the clk whose rate is being returned
*
* Simply returns the cached rate of the clk, unless CLK_GET_RATE_NOCACHE flag
* is set, which means a recalc_rate will be issued.
* If clk is NULL then returns 0.
*/
unsigned long clk_get_rate(struct clk *clk)
{
unsigned long rate;
mutex_lock(&prepare_lock);
if (clk && (clk->flags & CLK_GET_RATE_NOCACHE))
__clk_recalc_rates(clk, 0);
rate = __clk_get_rate(clk);
mutex_unlock(&prepare_lock);
return rate;
}
EXPORT_SYMBOL_GPL(clk_get_rate);
/**
* __clk_speculate_rates
* @clk: first clk in the subtree
@ -1582,6 +1587,20 @@ struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
}
EXPORT_SYMBOL_GPL(of_clk_src_simple_get);
struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data)
{
struct clk_onecell_data *clk_data = data;
unsigned int idx = clkspec->args[0];
if (idx >= clk_data->clk_num) {
pr_err("%s: invalid clock index %d\n", __func__, idx);
return ERR_PTR(-EINVAL);
}
return clk_data->clks[idx];
}
EXPORT_SYMBOL_GPL(of_clk_src_onecell_get);
/**
* of_clk_add_provider() - Register a clock provider for a node
* @np: Device node pointer associated with clock provider

9
drivers/clk/mmp/Makefile Normal file
View File

@ -0,0 +1,9 @@
#
# Makefile for mmp specific clk
#
obj-y += clk-apbc.o clk-apmu.o clk-frac.o
obj-$(CONFIG_CPU_PXA168) += clk-pxa168.o
obj-$(CONFIG_CPU_PXA910) += clk-pxa910.o
obj-$(CONFIG_CPU_MMP2) += clk-mmp2.o

152
drivers/clk/mmp/clk-apbc.c Normal file
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@ -0,0 +1,152 @@
/*
* mmp APB clock operation source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include "clk.h"
/* Common APB clock register bit definitions */
#define APBC_APBCLK (1 << 0) /* APB Bus Clock Enable */
#define APBC_FNCLK (1 << 1) /* Functional Clock Enable */
#define APBC_RST (1 << 2) /* Reset Generation */
#define APBC_POWER (1 << 7) /* Reset Generation */
#define to_clk_apbc(hw) container_of(hw, struct clk_apbc, hw)
struct clk_apbc {
struct clk_hw hw;
void __iomem *base;
unsigned int delay;
unsigned int flags;
spinlock_t *lock;
};
static int clk_apbc_prepare(struct clk_hw *hw)
{
struct clk_apbc *apbc = to_clk_apbc(hw);
unsigned int data;
unsigned long flags = 0;
/*
* It may share same register as MUX clock,
* and it will impact FNCLK enable. Spinlock is needed
*/
if (apbc->lock)
spin_lock_irqsave(apbc->lock, flags);
data = readl_relaxed(apbc->base);
if (apbc->flags & APBC_POWER_CTRL)
data |= APBC_POWER;
data |= APBC_FNCLK;
writel_relaxed(data, apbc->base);
if (apbc->lock)
spin_unlock_irqrestore(apbc->lock, flags);
udelay(apbc->delay);
if (apbc->lock)
spin_lock_irqsave(apbc->lock, flags);
data = readl_relaxed(apbc->base);
data |= APBC_APBCLK;
writel_relaxed(data, apbc->base);
if (apbc->lock)
spin_unlock_irqrestore(apbc->lock, flags);
udelay(apbc->delay);
if (!(apbc->flags & APBC_NO_BUS_CTRL)) {
if (apbc->lock)
spin_lock_irqsave(apbc->lock, flags);
data = readl_relaxed(apbc->base);
data &= ~APBC_RST;
writel_relaxed(data, apbc->base);
if (apbc->lock)
spin_unlock_irqrestore(apbc->lock, flags);
}
return 0;
}
static void clk_apbc_unprepare(struct clk_hw *hw)
{
struct clk_apbc *apbc = to_clk_apbc(hw);
unsigned long data;
unsigned long flags = 0;
if (apbc->lock)
spin_lock_irqsave(apbc->lock, flags);
data = readl_relaxed(apbc->base);
if (apbc->flags & APBC_POWER_CTRL)
data &= ~APBC_POWER;
data &= ~APBC_FNCLK;
writel_relaxed(data, apbc->base);
if (apbc->lock)
spin_unlock_irqrestore(apbc->lock, flags);
udelay(10);
if (apbc->lock)
spin_lock_irqsave(apbc->lock, flags);
data = readl_relaxed(apbc->base);
data &= ~APBC_APBCLK;
writel_relaxed(data, apbc->base);
if (apbc->lock)
spin_unlock_irqrestore(apbc->lock, flags);
}
struct clk_ops clk_apbc_ops = {
.prepare = clk_apbc_prepare,
.unprepare = clk_apbc_unprepare,
};
struct clk *mmp_clk_register_apbc(const char *name, const char *parent_name,
void __iomem *base, unsigned int delay,
unsigned int apbc_flags, spinlock_t *lock)
{
struct clk_apbc *apbc;
struct clk *clk;
struct clk_init_data init;
apbc = kzalloc(sizeof(*apbc), GFP_KERNEL);
if (!apbc)
return NULL;
init.name = name;
init.ops = &clk_apbc_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = (parent_name ? &parent_name : NULL);
init.num_parents = (parent_name ? 1 : 0);
apbc->base = base;
apbc->delay = delay;
apbc->flags = apbc_flags;
apbc->lock = lock;
apbc->hw.init = &init;
clk = clk_register(NULL, &apbc->hw);
if (IS_ERR(clk))
kfree(apbc);
return clk;
}

97
drivers/clk/mmp/clk-apmu.c Normal file
View File

@ -0,0 +1,97 @@
/*
* mmp AXI peripharal clock operation source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include "clk.h"
#define to_clk_apmu(clk) (container_of(clk, struct clk_apmu, clk))
struct clk_apmu {
struct clk_hw hw;
void __iomem *base;
u32 rst_mask;
u32 enable_mask;
spinlock_t *lock;
};
static int clk_apmu_enable(struct clk_hw *hw)
{
struct clk_apmu *apmu = to_clk_apmu(hw);
unsigned long data;
unsigned long flags = 0;
if (apmu->lock)
spin_lock_irqsave(apmu->lock, flags);
data = readl_relaxed(apmu->base) | apmu->enable_mask;
writel_relaxed(data, apmu->base);
if (apmu->lock)
spin_unlock_irqrestore(apmu->lock, flags);
return 0;
}
static void clk_apmu_disable(struct clk_hw *hw)
{
struct clk_apmu *apmu = to_clk_apmu(hw);
unsigned long data;
unsigned long flags = 0;
if (apmu->lock)
spin_lock_irqsave(apmu->lock, flags);
data = readl_relaxed(apmu->base) & ~apmu->enable_mask;
writel_relaxed(data, apmu->base);
if (apmu->lock)
spin_unlock_irqrestore(apmu->lock, flags);
}
struct clk_ops clk_apmu_ops = {
.enable = clk_apmu_enable,
.disable = clk_apmu_disable,
};
struct clk *mmp_clk_register_apmu(const char *name, const char *parent_name,
void __iomem *base, u32 enable_mask, spinlock_t *lock)
{
struct clk_apmu *apmu;
struct clk *clk;
struct clk_init_data init;
apmu = kzalloc(sizeof(*apmu), GFP_KERNEL);
if (!apmu)
return NULL;
init.name = name;
init.ops = &clk_apmu_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = (parent_name ? &parent_name : NULL);
init.num_parents = (parent_name ? 1 : 0);
apmu->base = base;
apmu->enable_mask = enable_mask;
apmu->lock = lock;
apmu->hw.init = &init;
clk = clk_register(NULL, &apmu->hw);
if (IS_ERR(clk))
kfree(apmu);
return clk;
}

153
drivers/clk/mmp/clk-frac.c Normal file
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@ -0,0 +1,153 @@
/*
* mmp factor clock operation source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include "clk.h"
/*
* It is M/N clock
*
* Fout from synthesizer can be given from two equations:
* numerator/denominator = Fin / (Fout * factor)
*/
#define to_clk_factor(hw) container_of(hw, struct clk_factor, hw)
struct clk_factor {
struct clk_hw hw;
void __iomem *base;
struct clk_factor_masks *masks;
struct clk_factor_tbl *ftbl;
unsigned int ftbl_cnt;
};
static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
unsigned long *prate)
{
struct clk_factor *factor = to_clk_factor(hw);
unsigned long rate = 0, prev_rate;
int i;
for (i = 0; i < factor->ftbl_cnt; i++) {
prev_rate = rate;
rate = (((*prate / 10000) * factor->ftbl[i].num) /
(factor->ftbl[i].den * factor->masks->factor)) * 10000;
if (rate > drate)
break;
}
if (i == 0)
return rate;
else
return prev_rate;
}
static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_factor *factor = to_clk_factor(hw);
struct clk_factor_masks *masks = factor->masks;
unsigned int val, num, den;
val = readl_relaxed(factor->base);
/* calculate numerator */
num = (val >> masks->num_shift) & masks->num_mask;
/* calculate denominator */
den = (val >> masks->den_shift) & masks->num_mask;
if (!den)
return 0;
return (((parent_rate / 10000) * den) /
(num * factor->masks->factor)) * 10000;
}
/* Configures new clock rate*/
static int clk_factor_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct clk_factor *factor = to_clk_factor(hw);
struct clk_factor_masks *masks = factor->masks;
int i;
unsigned long val;
unsigned long prev_rate, rate = 0;
for (i = 0; i < factor->ftbl_cnt; i++) {
prev_rate = rate;
rate = (((prate / 10000) * factor->ftbl[i].num) /
(factor->ftbl[i].den * factor->masks->factor)) * 10000;
if (rate > drate)
break;
}
if (i > 0)
i--;
val = readl_relaxed(factor->base);
val &= ~(masks->num_mask << masks->num_shift);
val |= (factor->ftbl[i].num & masks->num_mask) << masks->num_shift;
val &= ~(masks->den_mask << masks->den_shift);
val |= (factor->ftbl[i].den & masks->den_mask) << masks->den_shift;
writel_relaxed(val, factor->base);
return 0;
}
static struct clk_ops clk_factor_ops = {
.recalc_rate = clk_factor_recalc_rate,
.round_rate = clk_factor_round_rate,
.set_rate = clk_factor_set_rate,
};
struct clk *mmp_clk_register_factor(const char *name, const char *parent_name,
unsigned long flags, void __iomem *base,
struct clk_factor_masks *masks, struct clk_factor_tbl *ftbl,
unsigned int ftbl_cnt)
{
struct clk_factor *factor;
struct clk_init_data init;
struct clk *clk;
if (!masks) {
pr_err("%s: must pass a clk_factor_mask\n", __func__);
return ERR_PTR(-EINVAL);
}
factor = kzalloc(sizeof(*factor), GFP_KERNEL);
if (!factor) {
pr_err("%s: could not allocate factor clk\n", __func__);
return ERR_PTR(-ENOMEM);
}
/* struct clk_aux assignments */
factor->base = base;
factor->masks = masks;
factor->ftbl = ftbl;
factor->ftbl_cnt = ftbl_cnt;
factor->hw.init = &init;
init.name = name;
init.ops = &clk_factor_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
clk = clk_register(NULL, &factor->hw);
if (IS_ERR_OR_NULL(clk))
kfree(factor);
return clk;
}

449
drivers/clk/mmp/clk-mmp2.c Normal file
View File

@ -0,0 +1,449 @@
/*
* mmp2 clock framework source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <mach/addr-map.h>
#include "clk.h"
#define APBC_RTC 0x0
#define APBC_TWSI0 0x4
#define APBC_TWSI1 0x8
#define APBC_TWSI2 0xc
#define APBC_TWSI3 0x10
#define APBC_TWSI4 0x7c
#define APBC_TWSI5 0x80
#define APBC_KPC 0x18
#define APBC_UART0 0x2c
#define APBC_UART1 0x30
#define APBC_UART2 0x34
#define APBC_UART3 0x88
#define APBC_GPIO 0x38
#define APBC_PWM0 0x3c
#define APBC_PWM1 0x40
#define APBC_PWM2 0x44
#define APBC_PWM3 0x48
#define APBC_SSP0 0x50
#define APBC_SSP1 0x54
#define APBC_SSP2 0x58
#define APBC_SSP3 0x5c
#define APMU_SDH0 0x54
#define APMU_SDH1 0x58
#define APMU_SDH2 0xe8
#define APMU_SDH3 0xec
#define APMU_USB 0x5c
#define APMU_DISP0 0x4c
#define APMU_DISP1 0x110
#define APMU_CCIC0 0x50
#define APMU_CCIC1 0xf4
#define MPMU_UART_PLL 0x14
static DEFINE_SPINLOCK(clk_lock);
static struct clk_factor_masks uart_factor_masks = {
.factor = 2,
.num_mask = 0x1fff,
.den_mask = 0x1fff,
.num_shift = 16,
.den_shift = 0,
};
static struct clk_factor_tbl uart_factor_tbl[] = {
{.num = 14634, .den = 2165}, /*14.745MHZ */
{.num = 3521, .den = 689}, /*19.23MHZ */
{.num = 9679, .den = 5728}, /*58.9824MHZ */
{.num = 15850, .den = 9451}, /*59.429MHZ */
};
static const char *uart_parent[] = {"uart_pll", "vctcxo"};
static const char *ssp_parent[] = {"vctcxo_4", "vctcxo_2", "vctcxo", "pll1_16"};
static const char *sdh_parent[] = {"pll1_4", "pll2", "usb_pll", "pll1"};
static const char *disp_parent[] = {"pll1", "pll1_16", "pll2", "vctcxo"};
static const char *ccic_parent[] = {"pll1_2", "pll1_16", "vctcxo"};
void __init mmp2_clk_init(void)
{
struct clk *clk;
struct clk *vctcxo;
void __iomem *mpmu_base;
void __iomem *apmu_base;
void __iomem *apbc_base;
mpmu_base = ioremap(APB_PHYS_BASE + 0x50000, SZ_4K);
if (mpmu_base == NULL) {
pr_err("error to ioremap MPMU base\n");
return;
}
apmu_base = ioremap(AXI_PHYS_BASE + 0x82800, SZ_4K);
if (apmu_base == NULL) {
pr_err("error to ioremap APMU base\n");
return;
}
apbc_base = ioremap(APB_PHYS_BASE + 0x15000, SZ_4K);
if (apbc_base == NULL) {
pr_err("error to ioremap APBC base\n");
return;
}
clk = clk_register_fixed_rate(NULL, "clk32", NULL, CLK_IS_ROOT, 3200);
clk_register_clkdev(clk, "clk32", NULL);
vctcxo = clk_register_fixed_rate(NULL, "vctcxo", NULL, CLK_IS_ROOT,
26000000);
clk_register_clkdev(vctcxo, "vctcxo", NULL);
clk = clk_register_fixed_rate(NULL, "pll1", NULL, CLK_IS_ROOT,
800000000);
clk_register_clkdev(clk, "pll1", NULL);
clk = clk_register_fixed_rate(NULL, "usb_pll", NULL, CLK_IS_ROOT,
480000000);
clk_register_clkdev(clk, "usb_pll", NULL);
clk = clk_register_fixed_rate(NULL, "pll2", NULL, CLK_IS_ROOT,
960000000);
clk_register_clkdev(clk, "pll2", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_2", "pll1",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_2", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_4", "pll1_2",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_4", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_8", "pll1_4",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_8", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_16", "pll1_8",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_16", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_20", "pll1_4",
CLK_SET_RATE_PARENT, 1, 5);
clk_register_clkdev(clk, "pll1_20", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_3", "pll1",
CLK_SET_RATE_PARENT, 1, 3);
clk_register_clkdev(clk, "pll1_3", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_6", "pll1_3",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_6", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_12", "pll1_6",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_12", NULL);
clk = clk_register_fixed_factor(NULL, "pll2_2", "pll2",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll2_2", NULL);
clk = clk_register_fixed_factor(NULL, "pll2_4", "pll2_2",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll2_4", NULL);
clk = clk_register_fixed_factor(NULL, "pll2_8", "pll2_4",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll2_8", NULL);
clk = clk_register_fixed_factor(NULL, "pll2_16", "pll2_8",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll2_16", NULL);
clk = clk_register_fixed_factor(NULL, "pll2_3", "pll2",
CLK_SET_RATE_PARENT, 1, 3);
clk_register_clkdev(clk, "pll2_3", NULL);
clk = clk_register_fixed_factor(NULL, "pll2_6", "pll2_3",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll2_6", NULL);
clk = clk_register_fixed_factor(NULL, "pll2_12", "pll2_6",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll2_12", NULL);
clk = clk_register_fixed_factor(NULL, "vctcxo_2", "vctcxo",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "vctcxo_2", NULL);
clk = clk_register_fixed_factor(NULL, "vctcxo_4", "vctcxo_2",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "vctcxo_4", NULL);
clk = mmp_clk_register_factor("uart_pll", "pll1_4", 0,
mpmu_base + MPMU_UART_PLL,
&uart_factor_masks, uart_factor_tbl,
ARRAY_SIZE(uart_factor_tbl));
clk_set_rate(clk, 14745600);
clk_register_clkdev(clk, "uart_pll", NULL);
clk = mmp_clk_register_apbc("twsi0", "vctcxo",
apbc_base + APBC_TWSI0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.0");
clk = mmp_clk_register_apbc("twsi1", "vctcxo",
apbc_base + APBC_TWSI1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.1");
clk = mmp_clk_register_apbc("twsi2", "vctcxo",
apbc_base + APBC_TWSI2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.2");
clk = mmp_clk_register_apbc("twsi3", "vctcxo",
apbc_base + APBC_TWSI3, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.3");
clk = mmp_clk_register_apbc("twsi4", "vctcxo",
apbc_base + APBC_TWSI4, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.4");
clk = mmp_clk_register_apbc("twsi5", "vctcxo",
apbc_base + APBC_TWSI5, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.5");
clk = mmp_clk_register_apbc("gpio", "vctcxo",
apbc_base + APBC_GPIO, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa-gpio");
clk = mmp_clk_register_apbc("kpc", "clk32",
apbc_base + APBC_KPC, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa27x-keypad");
clk = mmp_clk_register_apbc("rtc", "clk32",
apbc_base + APBC_RTC, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-rtc");
clk = mmp_clk_register_apbc("pwm0", "vctcxo",
apbc_base + APBC_PWM0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp2-pwm.0");
clk = mmp_clk_register_apbc("pwm1", "vctcxo",
apbc_base + APBC_PWM1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp2-pwm.1");
clk = mmp_clk_register_apbc("pwm2", "vctcxo",
apbc_base + APBC_PWM2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp2-pwm.2");
clk = mmp_clk_register_apbc("pwm3", "vctcxo",
apbc_base + APBC_PWM3, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp2-pwm.3");
clk = clk_register_mux(NULL, "uart0_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART0, 4, 3, 0, &clk_lock);
clk_set_parent(clk, vctcxo);
clk_register_clkdev(clk, "uart_mux.0", NULL);
clk = mmp_clk_register_apbc("uart0", "uart0_mux",
apbc_base + APBC_UART0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.0");
clk = clk_register_mux(NULL, "uart1_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART1, 4, 3, 0, &clk_lock);
clk_set_parent(clk, vctcxo);
clk_register_clkdev(clk, "uart_mux.1", NULL);
clk = mmp_clk_register_apbc("uart1", "uart1_mux",
apbc_base + APBC_UART1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.1");
clk = clk_register_mux(NULL, "uart2_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART2, 4, 3, 0, &clk_lock);
clk_set_parent(clk, vctcxo);
clk_register_clkdev(clk, "uart_mux.2", NULL);
clk = mmp_clk_register_apbc("uart2", "uart2_mux",
apbc_base + APBC_UART2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.2");
clk = clk_register_mux(NULL, "uart3_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART3, 4, 3, 0, &clk_lock);
clk_set_parent(clk, vctcxo);
clk_register_clkdev(clk, "uart_mux.3", NULL);
clk = mmp_clk_register_apbc("uart3", "uart3_mux",
apbc_base + APBC_UART3, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.3");
clk = clk_register_mux(NULL, "ssp0_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP0, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "uart_mux.0", NULL);
clk = mmp_clk_register_apbc("ssp0", "ssp0_mux",
apbc_base + APBC_SSP0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.0");
clk = clk_register_mux(NULL, "ssp1_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP1, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.1", NULL);
clk = mmp_clk_register_apbc("ssp1", "ssp1_mux",
apbc_base + APBC_SSP1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.1");
clk = clk_register_mux(NULL, "ssp2_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP2, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.2", NULL);
clk = mmp_clk_register_apbc("ssp2", "ssp2_mux",
apbc_base + APBC_SSP2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.2");
clk = clk_register_mux(NULL, "ssp3_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP3, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.3", NULL);
clk = mmp_clk_register_apbc("ssp3", "ssp3_mux",
apbc_base + APBC_SSP3, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.3");
clk = clk_register_mux(NULL, "sdh_mux", sdh_parent,
ARRAY_SIZE(sdh_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_SDH0, 8, 2, 0, &clk_lock);
clk_register_clkdev(clk, "sdh_mux", NULL);
clk = clk_register_divider(NULL, "sdh_div", "sdh_mux",
CLK_SET_RATE_PARENT, apmu_base + APMU_SDH0,
10, 4, CLK_DIVIDER_ONE_BASED, &clk_lock);
clk_register_clkdev(clk, "sdh_div", NULL);
clk = mmp_clk_register_apmu("sdh0", "sdh_div", apmu_base + APMU_SDH0,
0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxav3.0");
clk = mmp_clk_register_apmu("sdh1", "sdh_div", apmu_base + APMU_SDH1,
0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxav3.1");
clk = mmp_clk_register_apmu("sdh2", "sdh_div", apmu_base + APMU_SDH2,
0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxav3.2");
clk = mmp_clk_register_apmu("sdh3", "sdh_div", apmu_base + APMU_SDH3,
0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxav3.3");
clk = mmp_clk_register_apmu("usb", "usb_pll", apmu_base + APMU_USB,
0x9, &clk_lock);
clk_register_clkdev(clk, "usb_clk", NULL);
clk = clk_register_mux(NULL, "disp0_mux", disp_parent,
ARRAY_SIZE(disp_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_DISP0, 6, 2, 0, &clk_lock);
clk_register_clkdev(clk, "disp_mux.0", NULL);
clk = clk_register_divider(NULL, "disp0_div", "disp0_mux",
CLK_SET_RATE_PARENT, apmu_base + APMU_DISP0,
8, 4, CLK_DIVIDER_ONE_BASED, &clk_lock);
clk_register_clkdev(clk, "disp_div.0", NULL);
clk = mmp_clk_register_apmu("disp0", "disp0_div",
apmu_base + APMU_DISP0, 0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-disp.0");
clk = clk_register_divider(NULL, "disp0_sphy_div", "disp0_mux", 0,
apmu_base + APMU_DISP0, 15, 5, 0, &clk_lock);
clk_register_clkdev(clk, "disp_sphy_div.0", NULL);
clk = mmp_clk_register_apmu("disp0_sphy", "disp0_sphy_div",
apmu_base + APMU_DISP0, 0x1024, &clk_lock);
clk_register_clkdev(clk, "disp_sphy.0", NULL);
clk = clk_register_mux(NULL, "disp1_mux", disp_parent,
ARRAY_SIZE(disp_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_DISP1, 6, 2, 0, &clk_lock);
clk_register_clkdev(clk, "disp_mux.1", NULL);
clk = clk_register_divider(NULL, "disp1_div", "disp1_mux",
CLK_SET_RATE_PARENT, apmu_base + APMU_DISP1,
8, 4, CLK_DIVIDER_ONE_BASED, &clk_lock);
clk_register_clkdev(clk, "disp_div.1", NULL);
clk = mmp_clk_register_apmu("disp1", "disp1_div",
apmu_base + APMU_DISP1, 0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-disp.1");
clk = mmp_clk_register_apmu("ccic_arbiter", "vctcxo",
apmu_base + APMU_CCIC0, 0x1800, &clk_lock);
clk_register_clkdev(clk, "ccic_arbiter", NULL);
clk = clk_register_mux(NULL, "ccic0_mux", ccic_parent,
ARRAY_SIZE(ccic_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_CCIC0, 6, 2, 0, &clk_lock);
clk_register_clkdev(clk, "ccic_mux.0", NULL);
clk = clk_register_divider(NULL, "ccic0_div", "ccic0_mux",
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC0,
17, 4, CLK_DIVIDER_ONE_BASED, &clk_lock);
clk_register_clkdev(clk, "ccic_div.0", NULL);
clk = mmp_clk_register_apmu("ccic0", "ccic0_div",
apmu_base + APMU_CCIC0, 0x1b, &clk_lock);
clk_register_clkdev(clk, "fnclk", "mmp-ccic.0");
clk = mmp_clk_register_apmu("ccic0_phy", "ccic0_div",
apmu_base + APMU_CCIC0, 0x24, &clk_lock);
clk_register_clkdev(clk, "phyclk", "mmp-ccic.0");
clk = clk_register_divider(NULL, "ccic0_sphy_div", "ccic0_div",
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC0,
10, 5, 0, &clk_lock);
clk_register_clkdev(clk, "sphyclk_div", "mmp-ccic.0");
clk = mmp_clk_register_apmu("ccic0_sphy", "ccic0_sphy_div",
apmu_base + APMU_CCIC0, 0x300, &clk_lock);
clk_register_clkdev(clk, "sphyclk", "mmp-ccic.0");
clk = clk_register_mux(NULL, "ccic1_mux", ccic_parent,
ARRAY_SIZE(ccic_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_CCIC1, 6, 2, 0, &clk_lock);
clk_register_clkdev(clk, "ccic_mux.1", NULL);
clk = clk_register_divider(NULL, "ccic1_div", "ccic1_mux",
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC1,
16, 4, CLK_DIVIDER_ONE_BASED, &clk_lock);
clk_register_clkdev(clk, "ccic_div.1", NULL);
clk = mmp_clk_register_apmu("ccic1", "ccic1_div",
apmu_base + APMU_CCIC1, 0x1b, &clk_lock);
clk_register_clkdev(clk, "fnclk", "mmp-ccic.1");
clk = mmp_clk_register_apmu("ccic1_phy", "ccic1_div",
apmu_base + APMU_CCIC1, 0x24, &clk_lock);
clk_register_clkdev(clk, "phyclk", "mmp-ccic.1");
clk = clk_register_divider(NULL, "ccic1_sphy_div", "ccic1_div",
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC1,
10, 5, 0, &clk_lock);
clk_register_clkdev(clk, "sphyclk_div", "mmp-ccic.1");
clk = mmp_clk_register_apmu("ccic1_sphy", "ccic1_sphy_div",
apmu_base + APMU_CCIC1, 0x300, &clk_lock);
clk_register_clkdev(clk, "sphyclk", "mmp-ccic.1");
}

346
drivers/clk/mmp/clk-pxa168.c Normal file
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/*
* pxa168 clock framework source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <mach/addr-map.h>
#include "clk.h"
#define APBC_RTC 0x28
#define APBC_TWSI0 0x2c
#define APBC_KPC 0x30
#define APBC_UART0 0x0
#define APBC_UART1 0x4
#define APBC_GPIO 0x8
#define APBC_PWM0 0xc
#define APBC_PWM1 0x10
#define APBC_PWM2 0x14
#define APBC_PWM3 0x18
#define APBC_SSP0 0x81c
#define APBC_SSP1 0x820
#define APBC_SSP2 0x84c
#define APBC_SSP3 0x858
#define APBC_SSP4 0x85c
#define APBC_TWSI1 0x6c
#define APBC_UART2 0x70
#define APMU_SDH0 0x54
#define APMU_SDH1 0x58
#define APMU_USB 0x5c
#define APMU_DISP0 0x4c
#define APMU_CCIC0 0x50
#define APMU_DFC 0x60
#define MPMU_UART_PLL 0x14
static DEFINE_SPINLOCK(clk_lock);
static struct clk_factor_masks uart_factor_masks = {
.factor = 2,
.num_mask = 0x1fff,
.den_mask = 0x1fff,
.num_shift = 16,
.den_shift = 0,
};
static struct clk_factor_tbl uart_factor_tbl[] = {
{.num = 8125, .den = 1536}, /*14.745MHZ */
};
static const char *uart_parent[] = {"pll1_3_16", "uart_pll"};
static const char *ssp_parent[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};
static const char *sdh_parent[] = {"pll1_12", "pll1_13"};
static const char *disp_parent[] = {"pll1_2", "pll1_12"};
static const char *ccic_parent[] = {"pll1_2", "pll1_12"};
static const char *ccic_phy_parent[] = {"pll1_6", "pll1_12"};
void __init pxa168_clk_init(void)
{
struct clk *clk;
struct clk *uart_pll;
void __iomem *mpmu_base;
void __iomem *apmu_base;
void __iomem *apbc_base;
mpmu_base = ioremap(APB_PHYS_BASE + 0x50000, SZ_4K);
if (mpmu_base == NULL) {
pr_err("error to ioremap MPMU base\n");
return;
}
apmu_base = ioremap(AXI_PHYS_BASE + 0x82800, SZ_4K);
if (apmu_base == NULL) {
pr_err("error to ioremap APMU base\n");
return;
}
apbc_base = ioremap(APB_PHYS_BASE + 0x15000, SZ_4K);
if (apbc_base == NULL) {
pr_err("error to ioremap APBC base\n");
return;
}
clk = clk_register_fixed_rate(NULL, "clk32", NULL, CLK_IS_ROOT, 3200);
clk_register_clkdev(clk, "clk32", NULL);
clk = clk_register_fixed_rate(NULL, "vctcxo", NULL, CLK_IS_ROOT,
26000000);
clk_register_clkdev(clk, "vctcxo", NULL);
clk = clk_register_fixed_rate(NULL, "pll1", NULL, CLK_IS_ROOT,
624000000);
clk_register_clkdev(clk, "pll1", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_2", "pll1",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_2", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_4", "pll1_2",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_4", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_8", "pll1_4",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_8", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_16", "pll1_8",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_16", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_6", "pll1_2",
CLK_SET_RATE_PARENT, 1, 3);
clk_register_clkdev(clk, "pll1_6", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_12", "pll1_6",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_12", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_24", "pll1_12",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_24", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_48", "pll1_24",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_48", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_96", "pll1_48",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_96", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_13", "pll1",
CLK_SET_RATE_PARENT, 1, 13);
clk_register_clkdev(clk, "pll1_13", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_13_1_5", "pll1",
CLK_SET_RATE_PARENT, 2, 3);
clk_register_clkdev(clk, "pll1_13_1_5", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_2_1_5", "pll1",
CLK_SET_RATE_PARENT, 2, 3);
clk_register_clkdev(clk, "pll1_2_1_5", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_3_16", "pll1",
CLK_SET_RATE_PARENT, 3, 16);
clk_register_clkdev(clk, "pll1_3_16", NULL);
uart_pll = mmp_clk_register_factor("uart_pll", "pll1_4", 0,
mpmu_base + MPMU_UART_PLL,
&uart_factor_masks, uart_factor_tbl,
ARRAY_SIZE(uart_factor_tbl));
clk_set_rate(uart_pll, 14745600);
clk_register_clkdev(uart_pll, "uart_pll", NULL);
clk = mmp_clk_register_apbc("twsi0", "pll1_13_1_5",
apbc_base + APBC_TWSI0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.0");
clk = mmp_clk_register_apbc("twsi1", "pll1_13_1_5",
apbc_base + APBC_TWSI1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.1");
clk = mmp_clk_register_apbc("gpio", "vctcxo",
apbc_base + APBC_GPIO, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa-gpio");
clk = mmp_clk_register_apbc("kpc", "clk32",
apbc_base + APBC_KPC, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa27x-keypad");
clk = mmp_clk_register_apbc("rtc", "clk32",
apbc_base + APBC_RTC, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "sa1100-rtc");
clk = mmp_clk_register_apbc("pwm0", "pll1_48",
apbc_base + APBC_PWM0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa168-pwm.0");
clk = mmp_clk_register_apbc("pwm1", "pll1_48",
apbc_base + APBC_PWM1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa168-pwm.1");
clk = mmp_clk_register_apbc("pwm2", "pll1_48",
apbc_base + APBC_PWM2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa168-pwm.2");
clk = mmp_clk_register_apbc("pwm3", "pll1_48",
apbc_base + APBC_PWM3, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa168-pwm.3");
clk = clk_register_mux(NULL, "uart0_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART0, 4, 3, 0, &clk_lock);
clk_set_parent(clk, uart_pll);
clk_register_clkdev(clk, "uart_mux.0", NULL);
clk = mmp_clk_register_apbc("uart0", "uart0_mux",
apbc_base + APBC_UART0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.0");
clk = clk_register_mux(NULL, "uart1_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART1, 4, 3, 0, &clk_lock);
clk_set_parent(clk, uart_pll);
clk_register_clkdev(clk, "uart_mux.1", NULL);
clk = mmp_clk_register_apbc("uart1", "uart1_mux",
apbc_base + APBC_UART1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.1");
clk = clk_register_mux(NULL, "uart2_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART2, 4, 3, 0, &clk_lock);
clk_set_parent(clk, uart_pll);
clk_register_clkdev(clk, "uart_mux.2", NULL);
clk = mmp_clk_register_apbc("uart2", "uart2_mux",
apbc_base + APBC_UART2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.2");
clk = clk_register_mux(NULL, "ssp0_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP0, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "uart_mux.0", NULL);
clk = mmp_clk_register_apbc("ssp0", "ssp0_mux", apbc_base + APBC_SSP0,
10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.0");
clk = clk_register_mux(NULL, "ssp1_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP1, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.1", NULL);
clk = mmp_clk_register_apbc("ssp1", "ssp1_mux", apbc_base + APBC_SSP1,
10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.1");
clk = clk_register_mux(NULL, "ssp2_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP2, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.2", NULL);
clk = mmp_clk_register_apbc("ssp2", "ssp1_mux", apbc_base + APBC_SSP2,
10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.2");
clk = clk_register_mux(NULL, "ssp3_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP3, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.3", NULL);
clk = mmp_clk_register_apbc("ssp3", "ssp1_mux", apbc_base + APBC_SSP3,
10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.3");
clk = clk_register_mux(NULL, "ssp4_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP4, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.4", NULL);
clk = mmp_clk_register_apbc("ssp4", "ssp1_mux", apbc_base + APBC_SSP4,
10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.4");
clk = mmp_clk_register_apmu("dfc", "pll1_4", apmu_base + APMU_DFC,
0x19b, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa3xx-nand.0");
clk = clk_register_mux(NULL, "sdh0_mux", sdh_parent,
ARRAY_SIZE(sdh_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_SDH0, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "sdh0_mux", NULL);
clk = mmp_clk_register_apmu("sdh0", "sdh_mux", apmu_base + APMU_SDH0,
0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxa.0");
clk = clk_register_mux(NULL, "sdh1_mux", sdh_parent,
ARRAY_SIZE(sdh_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_SDH1, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "sdh1_mux", NULL);
clk = mmp_clk_register_apmu("sdh1", "sdh1_mux", apmu_base + APMU_SDH1,
0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxa.1");
clk = mmp_clk_register_apmu("usb", "usb_pll", apmu_base + APMU_USB,
0x9, &clk_lock);
clk_register_clkdev(clk, "usb_clk", NULL);
clk = mmp_clk_register_apmu("sph", "usb_pll", apmu_base + APMU_USB,
0x12, &clk_lock);
clk_register_clkdev(clk, "sph_clk", NULL);
clk = clk_register_mux(NULL, "disp0_mux", disp_parent,
ARRAY_SIZE(disp_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_DISP0, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "disp_mux.0", NULL);
clk = mmp_clk_register_apmu("disp0", "disp0_mux",
apmu_base + APMU_DISP0, 0x1b, &clk_lock);
clk_register_clkdev(clk, "fnclk", "mmp-disp.0");
clk = mmp_clk_register_apmu("disp0_hclk", "disp0_mux",
apmu_base + APMU_DISP0, 0x24, &clk_lock);
clk_register_clkdev(clk, "hclk", "mmp-disp.0");
clk = clk_register_mux(NULL, "ccic0_mux", ccic_parent,
ARRAY_SIZE(ccic_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_CCIC0, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "ccic_mux.0", NULL);
clk = mmp_clk_register_apmu("ccic0", "ccic0_mux",
apmu_base + APMU_CCIC0, 0x1b, &clk_lock);
clk_register_clkdev(clk, "fnclk", "mmp-ccic.0");
clk = clk_register_mux(NULL, "ccic0_phy_mux", ccic_phy_parent,
ARRAY_SIZE(ccic_phy_parent),
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC0,
7, 1, 0, &clk_lock);
clk_register_clkdev(clk, "ccic_phy_mux.0", NULL);
clk = mmp_clk_register_apmu("ccic0_phy", "ccic0_phy_mux",
apmu_base + APMU_CCIC0, 0x24, &clk_lock);
clk_register_clkdev(clk, "phyclk", "mmp-ccic.0");
clk = clk_register_divider(NULL, "ccic0_sphy_div", "ccic0_mux",
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC0,
10, 5, 0, &clk_lock);
clk_register_clkdev(clk, "sphyclk_div", NULL);
clk = mmp_clk_register_apmu("ccic0_sphy", "ccic0_sphy_div",
apmu_base + APMU_CCIC0, 0x300, &clk_lock);
clk_register_clkdev(clk, "sphyclk", "mmp-ccic.0");
}

320
drivers/clk/mmp/clk-pxa910.c Normal file
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/*
* pxa910 clock framework source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <mach/addr-map.h>
#include "clk.h"
#define APBC_RTC 0x28
#define APBC_TWSI0 0x2c
#define APBC_KPC 0x18
#define APBC_UART0 0x0
#define APBC_UART1 0x4
#define APBC_GPIO 0x8
#define APBC_PWM0 0xc
#define APBC_PWM1 0x10
#define APBC_PWM2 0x14
#define APBC_PWM3 0x18
#define APBC_SSP0 0x1c
#define APBC_SSP1 0x20
#define APBC_SSP2 0x4c
#define APBCP_TWSI1 0x28
#define APBCP_UART2 0x1c
#define APMU_SDH0 0x54
#define APMU_SDH1 0x58
#define APMU_USB 0x5c
#define APMU_DISP0 0x4c
#define APMU_CCIC0 0x50
#define APMU_DFC 0x60
#define MPMU_UART_PLL 0x14
static DEFINE_SPINLOCK(clk_lock);
static struct clk_factor_masks uart_factor_masks = {
.factor = 2,
.num_mask = 0x1fff,
.den_mask = 0x1fff,
.num_shift = 16,
.den_shift = 0,
};
static struct clk_factor_tbl uart_factor_tbl[] = {
{.num = 8125, .den = 1536}, /*14.745MHZ */
};
static const char *uart_parent[] = {"pll1_3_16", "uart_pll"};
static const char *ssp_parent[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};
static const char *sdh_parent[] = {"pll1_12", "pll1_13"};
static const char *disp_parent[] = {"pll1_2", "pll1_12"};
static const char *ccic_parent[] = {"pll1_2", "pll1_12"};
static const char *ccic_phy_parent[] = {"pll1_6", "pll1_12"};
void __init pxa910_clk_init(void)
{
struct clk *clk;
struct clk *uart_pll;
void __iomem *mpmu_base;
void __iomem *apmu_base;
void __iomem *apbcp_base;
void __iomem *apbc_base;
mpmu_base = ioremap(APB_PHYS_BASE + 0x50000, SZ_4K);
if (mpmu_base == NULL) {
pr_err("error to ioremap MPMU base\n");
return;
}
apmu_base = ioremap(AXI_PHYS_BASE + 0x82800, SZ_4K);
if (apmu_base == NULL) {
pr_err("error to ioremap APMU base\n");
return;
}
apbcp_base = ioremap(APB_PHYS_BASE + 0x3b000, SZ_4K);
if (apbcp_base == NULL) {
pr_err("error to ioremap APBC extension base\n");
return;
}
apbc_base = ioremap(APB_PHYS_BASE + 0x15000, SZ_4K);
if (apbc_base == NULL) {
pr_err("error to ioremap APBC base\n");
return;
}
clk = clk_register_fixed_rate(NULL, "clk32", NULL, CLK_IS_ROOT, 3200);
clk_register_clkdev(clk, "clk32", NULL);
clk = clk_register_fixed_rate(NULL, "vctcxo", NULL, CLK_IS_ROOT,
26000000);
clk_register_clkdev(clk, "vctcxo", NULL);
clk = clk_register_fixed_rate(NULL, "pll1", NULL, CLK_IS_ROOT,
624000000);
clk_register_clkdev(clk, "pll1", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_2", "pll1",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_2", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_4", "pll1_2",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_4", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_8", "pll1_4",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_8", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_16", "pll1_8",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_16", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_6", "pll1_2",
CLK_SET_RATE_PARENT, 1, 3);
clk_register_clkdev(clk, "pll1_6", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_12", "pll1_6",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_12", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_24", "pll1_12",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_24", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_48", "pll1_24",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_48", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_96", "pll1_48",
CLK_SET_RATE_PARENT, 1, 2);
clk_register_clkdev(clk, "pll1_96", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_13", "pll1",
CLK_SET_RATE_PARENT, 1, 13);
clk_register_clkdev(clk, "pll1_13", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_13_1_5", "pll1",
CLK_SET_RATE_PARENT, 2, 3);
clk_register_clkdev(clk, "pll1_13_1_5", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_2_1_5", "pll1",
CLK_SET_RATE_PARENT, 2, 3);
clk_register_clkdev(clk, "pll1_2_1_5", NULL);
clk = clk_register_fixed_factor(NULL, "pll1_3_16", "pll1",
CLK_SET_RATE_PARENT, 3, 16);
clk_register_clkdev(clk, "pll1_3_16", NULL);
uart_pll = mmp_clk_register_factor("uart_pll", "pll1_4", 0,
mpmu_base + MPMU_UART_PLL,
&uart_factor_masks, uart_factor_tbl,
ARRAY_SIZE(uart_factor_tbl));
clk_set_rate(uart_pll, 14745600);
clk_register_clkdev(uart_pll, "uart_pll", NULL);
clk = mmp_clk_register_apbc("twsi0", "pll1_13_1_5",
apbc_base + APBC_TWSI0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.0");
clk = mmp_clk_register_apbc("twsi1", "pll1_13_1_5",
apbcp_base + APBCP_TWSI1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-i2c.1");
clk = mmp_clk_register_apbc("gpio", "vctcxo",
apbc_base + APBC_GPIO, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa-gpio");
clk = mmp_clk_register_apbc("kpc", "clk32",
apbc_base + APBC_KPC, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa27x-keypad");
clk = mmp_clk_register_apbc("rtc", "clk32",
apbc_base + APBC_RTC, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "sa1100-rtc");
clk = mmp_clk_register_apbc("pwm0", "pll1_48",
apbc_base + APBC_PWM0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa910-pwm.0");
clk = mmp_clk_register_apbc("pwm1", "pll1_48",
apbc_base + APBC_PWM1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa910-pwm.1");
clk = mmp_clk_register_apbc("pwm2", "pll1_48",
apbc_base + APBC_PWM2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa910-pwm.2");
clk = mmp_clk_register_apbc("pwm3", "pll1_48",
apbc_base + APBC_PWM3, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa910-pwm.3");
clk = clk_register_mux(NULL, "uart0_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART0, 4, 3, 0, &clk_lock);
clk_set_parent(clk, uart_pll);
clk_register_clkdev(clk, "uart_mux.0", NULL);
clk = mmp_clk_register_apbc("uart0", "uart0_mux",
apbc_base + APBC_UART0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.0");
clk = clk_register_mux(NULL, "uart1_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_UART1, 4, 3, 0, &clk_lock);
clk_set_parent(clk, uart_pll);
clk_register_clkdev(clk, "uart_mux.1", NULL);
clk = mmp_clk_register_apbc("uart1", "uart1_mux",
apbc_base + APBC_UART1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.1");
clk = clk_register_mux(NULL, "uart2_mux", uart_parent,
ARRAY_SIZE(uart_parent), CLK_SET_RATE_PARENT,
apbcp_base + APBCP_UART2, 4, 3, 0, &clk_lock);
clk_set_parent(clk, uart_pll);
clk_register_clkdev(clk, "uart_mux.2", NULL);
clk = mmp_clk_register_apbc("uart2", "uart2_mux",
apbcp_base + APBCP_UART2, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa2xx-uart.2");
clk = clk_register_mux(NULL, "ssp0_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP0, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "uart_mux.0", NULL);
clk = mmp_clk_register_apbc("ssp0", "ssp0_mux",
apbc_base + APBC_SSP0, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.0");
clk = clk_register_mux(NULL, "ssp1_mux", ssp_parent,
ARRAY_SIZE(ssp_parent), CLK_SET_RATE_PARENT,
apbc_base + APBC_SSP1, 4, 3, 0, &clk_lock);
clk_register_clkdev(clk, "ssp_mux.1", NULL);
clk = mmp_clk_register_apbc("ssp1", "ssp1_mux",
apbc_base + APBC_SSP1, 10, 0, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-ssp.1");
clk = mmp_clk_register_apmu("dfc", "pll1_4",
apmu_base + APMU_DFC, 0x19b, &clk_lock);
clk_register_clkdev(clk, NULL, "pxa3xx-nand.0");
clk = clk_register_mux(NULL, "sdh0_mux", sdh_parent,
ARRAY_SIZE(sdh_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_SDH0, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "sdh0_mux", NULL);
clk = mmp_clk_register_apmu("sdh0", "sdh_mux",
apmu_base + APMU_SDH0, 0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxa.0");
clk = clk_register_mux(NULL, "sdh1_mux", sdh_parent,
ARRAY_SIZE(sdh_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_SDH1, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "sdh1_mux", NULL);
clk = mmp_clk_register_apmu("sdh1", "sdh1_mux",
apmu_base + APMU_SDH1, 0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "sdhci-pxa.1");
clk = mmp_clk_register_apmu("usb", "usb_pll",
apmu_base + APMU_USB, 0x9, &clk_lock);
clk_register_clkdev(clk, "usb_clk", NULL);
clk = mmp_clk_register_apmu("sph", "usb_pll",
apmu_base + APMU_USB, 0x12, &clk_lock);
clk_register_clkdev(clk, "sph_clk", NULL);
clk = clk_register_mux(NULL, "disp0_mux", disp_parent,
ARRAY_SIZE(disp_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_DISP0, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "disp_mux.0", NULL);
clk = mmp_clk_register_apmu("disp0", "disp0_mux",
apmu_base + APMU_DISP0, 0x1b, &clk_lock);
clk_register_clkdev(clk, NULL, "mmp-disp.0");
clk = clk_register_mux(NULL, "ccic0_mux", ccic_parent,
ARRAY_SIZE(ccic_parent), CLK_SET_RATE_PARENT,
apmu_base + APMU_CCIC0, 6, 1, 0, &clk_lock);
clk_register_clkdev(clk, "ccic_mux.0", NULL);
clk = mmp_clk_register_apmu("ccic0", "ccic0_mux",
apmu_base + APMU_CCIC0, 0x1b, &clk_lock);
clk_register_clkdev(clk, "fnclk", "mmp-ccic.0");
clk = clk_register_mux(NULL, "ccic0_phy_mux", ccic_phy_parent,
ARRAY_SIZE(ccic_phy_parent),
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC0,
7, 1, 0, &clk_lock);
clk_register_clkdev(clk, "ccic_phy_mux.0", NULL);
clk = mmp_clk_register_apmu("ccic0_phy", "ccic0_phy_mux",
apmu_base + APMU_CCIC0, 0x24, &clk_lock);
clk_register_clkdev(clk, "phyclk", "mmp-ccic.0");
clk = clk_register_divider(NULL, "ccic0_sphy_div", "ccic0_mux",
CLK_SET_RATE_PARENT, apmu_base + APMU_CCIC0,
10, 5, 0, &clk_lock);
clk_register_clkdev(clk, "sphyclk_div", NULL);
clk = mmp_clk_register_apmu("ccic0_sphy", "ccic0_sphy_div",
apmu_base + APMU_CCIC0, 0x300, &clk_lock);
clk_register_clkdev(clk, "sphyclk", "mmp-ccic.0");
}

35
drivers/clk/mmp/clk.h Normal file
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#ifndef __MACH_MMP_CLK_H
#define __MACH_MMP_CLK_H
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#define APBC_NO_BUS_CTRL BIT(0)
#define APBC_POWER_CTRL BIT(1)
struct clk_factor_masks {
unsigned int factor;
unsigned int num_mask;
unsigned int den_mask;
unsigned int num_shift;
unsigned int den_shift;
};
struct clk_factor_tbl {
unsigned int num;
unsigned int den;
};
extern struct clk *mmp_clk_register_pll2(const char *name,
const char *parent_name, unsigned long flags);
extern struct clk *mmp_clk_register_apbc(const char *name,
const char *parent_name, void __iomem *base,
unsigned int delay, unsigned int apbc_flags, spinlock_t *lock);
extern struct clk *mmp_clk_register_apmu(const char *name,
const char *parent_name, void __iomem *base, u32 enable_mask,
spinlock_t *lock);
extern struct clk *mmp_clk_register_factor(const char *name,
const char *parent_name, unsigned long flags,
void __iomem *base, struct clk_factor_masks *masks,
struct clk_factor_tbl *ftbl, unsigned int ftbl_cnt);
#endif

12
drivers/clk/ux500/Makefile Normal file
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@ -0,0 +1,12 @@
#
# Makefile for ux500 clocks
#
# Clock types
obj-y += clk-prcc.o
obj-y += clk-prcmu.o
# Clock definitions
obj-y += u8500_clk.o
obj-y += u9540_clk.o
obj-y += u8540_clk.o

164
drivers/clk/ux500/clk-prcc.c Normal file
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/*
* PRCC clock implementation for ux500 platform.
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/clk-provider.h>
#include <linux/clk-private.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/types.h>
#include <mach/hardware.h>
#include "clk.h"
#define PRCC_PCKEN 0x000
#define PRCC_PCKDIS 0x004
#define PRCC_KCKEN 0x008
#define PRCC_KCKDIS 0x00C
#define PRCC_PCKSR 0x010
#define PRCC_KCKSR 0x014
#define to_clk_prcc(_hw) container_of(_hw, struct clk_prcc, hw)
struct clk_prcc {
struct clk_hw hw;
void __iomem *base;
u32 cg_sel;
int is_enabled;
};
/* PRCC clock operations. */
static int clk_prcc_pclk_enable(struct clk_hw *hw)
{
struct clk_prcc *clk = to_clk_prcc(hw);
writel(clk->cg_sel, (clk->base + PRCC_PCKEN));
while (!(readl(clk->base + PRCC_PCKSR) & clk->cg_sel))
cpu_relax();
clk->is_enabled = 1;
return 0;
}
static void clk_prcc_pclk_disable(struct clk_hw *hw)
{
struct clk_prcc *clk = to_clk_prcc(hw);
writel(clk->cg_sel, (clk->base + PRCC_PCKDIS));
clk->is_enabled = 0;
}
static int clk_prcc_kclk_enable(struct clk_hw *hw)
{
struct clk_prcc *clk = to_clk_prcc(hw);
writel(clk->cg_sel, (clk->base + PRCC_KCKEN));
while (!(readl(clk->base + PRCC_KCKSR) & clk->cg_sel))
cpu_relax();
clk->is_enabled = 1;
return 0;
}
static void clk_prcc_kclk_disable(struct clk_hw *hw)
{
struct clk_prcc *clk = to_clk_prcc(hw);
writel(clk->cg_sel, (clk->base + PRCC_KCKDIS));
clk->is_enabled = 0;
}
static int clk_prcc_is_enabled(struct clk_hw *hw)
{
struct clk_prcc *clk = to_clk_prcc(hw);
return clk->is_enabled;
}
static struct clk_ops clk_prcc_pclk_ops = {
.enable = clk_prcc_pclk_enable,
.disable = clk_prcc_pclk_disable,
.is_enabled = clk_prcc_is_enabled,
};
static struct clk_ops clk_prcc_kclk_ops = {
.enable = clk_prcc_kclk_enable,
.disable = clk_prcc_kclk_disable,
.is_enabled = clk_prcc_is_enabled,
};
static struct clk *clk_reg_prcc(const char *name,
const char *parent_name,
resource_size_t phy_base,
u32 cg_sel,
unsigned long flags,
struct clk_ops *clk_prcc_ops)
{
struct clk_prcc *clk;
struct clk_init_data clk_prcc_init;
struct clk *clk_reg;
if (!name) {
pr_err("clk_prcc: %s invalid arguments passed\n", __func__);
return ERR_PTR(-EINVAL);
}
clk = kzalloc(sizeof(struct clk_prcc), GFP_KERNEL);
if (!clk) {
pr_err("clk_prcc: %s could not allocate clk\n", __func__);
return ERR_PTR(-ENOMEM);
}
clk->base = ioremap(phy_base, SZ_4K);
if (!clk->base)
goto free_clk;
clk->cg_sel = cg_sel;
clk->is_enabled = 1;
clk_prcc_init.name = name;
clk_prcc_init.ops = clk_prcc_ops;
clk_prcc_init.flags = flags;
clk_prcc_init.parent_names = (parent_name ? &parent_name : NULL);
clk_prcc_init.num_parents = (parent_name ? 1 : 0);
clk->hw.init = &clk_prcc_init;
clk_reg = clk_register(NULL, &clk->hw);
if (IS_ERR_OR_NULL(clk_reg))
goto unmap_clk;
return clk_reg;
unmap_clk:
iounmap(clk->base);
free_clk:
kfree(clk);
pr_err("clk_prcc: %s failed to register clk\n", __func__);
return ERR_PTR(-ENOMEM);
}
struct clk *clk_reg_prcc_pclk(const char *name,
const char *parent_name,
resource_size_t phy_base,
u32 cg_sel,
unsigned long flags)
{
return clk_reg_prcc(name, parent_name, phy_base, cg_sel, flags,
&clk_prcc_pclk_ops);
}
struct clk *clk_reg_prcc_kclk(const char *name,
const char *parent_name,
resource_size_t phy_base,
u32 cg_sel,
unsigned long flags)
{
return clk_reg_prcc(name, parent_name, phy_base, cg_sel, flags,
&clk_prcc_kclk_ops);
}

252
drivers/clk/ux500/clk-prcmu.c Normal file
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/*
* PRCMU clock implementation for ux500 platform.
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/clk-provider.h>
#include <linux/clk-private.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include "clk.h"
#define to_clk_prcmu(_hw) container_of(_hw, struct clk_prcmu, hw)
struct clk_prcmu {
struct clk_hw hw;
u8 cg_sel;
int is_enabled;
};
/* PRCMU clock operations. */
static int clk_prcmu_prepare(struct clk_hw *hw)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
return prcmu_request_clock(clk->cg_sel, true);
}
static void clk_prcmu_unprepare(struct clk_hw *hw)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
if (prcmu_request_clock(clk->cg_sel, false))
pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
hw->init->name);
}
static int clk_prcmu_enable(struct clk_hw *hw)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
clk->is_enabled = 1;
return 0;
}
static void clk_prcmu_disable(struct clk_hw *hw)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
clk->is_enabled = 0;
}
static int clk_prcmu_is_enabled(struct clk_hw *hw)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
return clk->is_enabled;
}
static unsigned long clk_prcmu_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
return prcmu_clock_rate(clk->cg_sel);
}
static long clk_prcmu_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
return prcmu_round_clock_rate(clk->cg_sel, rate);
}
static int clk_prcmu_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
return prcmu_set_clock_rate(clk->cg_sel, rate);
}
static int request_ape_opp100(bool enable)
{
static int reqs;
int err = 0;
if (enable) {
if (!reqs)
err = prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP,
"clock", 100);
if (!err)
reqs++;
} else {
reqs--;
if (!reqs)
prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP,
"clock");
}
return err;
}
static int clk_prcmu_opp_prepare(struct clk_hw *hw)
{
int err;
struct clk_prcmu *clk = to_clk_prcmu(hw);
err = request_ape_opp100(true);
if (err) {
pr_err("clk_prcmu: %s failed to request APE OPP100 for %s.\n",
__func__, hw->init->name);
return err;
}
err = prcmu_request_clock(clk->cg_sel, true);
if (err)
request_ape_opp100(false);
return err;
}
static void clk_prcmu_opp_unprepare(struct clk_hw *hw)
{
struct clk_prcmu *clk = to_clk_prcmu(hw);
if (prcmu_request_clock(clk->cg_sel, false))
goto out_error;
if (request_ape_opp100(false))
goto out_error;
return;
out_error:
pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
hw->init->name);
}
static struct clk_ops clk_prcmu_scalable_ops = {
.prepare = clk_prcmu_prepare,
.unprepare = clk_prcmu_unprepare,
.enable = clk_prcmu_enable,
.disable = clk_prcmu_disable,
.is_enabled = clk_prcmu_is_enabled,
.recalc_rate = clk_prcmu_recalc_rate,
.round_rate = clk_prcmu_round_rate,
.set_rate = clk_prcmu_set_rate,
};
static struct clk_ops clk_prcmu_gate_ops = {
.prepare = clk_prcmu_prepare,
.unprepare = clk_prcmu_unprepare,
.enable = clk_prcmu_enable,
.disable = clk_prcmu_disable,
.is_enabled = clk_prcmu_is_enabled,
.recalc_rate = clk_prcmu_recalc_rate,
};
static struct clk_ops clk_prcmu_rate_ops = {
.is_enabled = clk_prcmu_is_enabled,
.recalc_rate = clk_prcmu_recalc_rate,
};
static struct clk_ops clk_prcmu_opp_gate_ops = {
.prepare = clk_prcmu_opp_prepare,
.unprepare = clk_prcmu_opp_unprepare,
.enable = clk_prcmu_enable,
.disable = clk_prcmu_disable,
.is_enabled = clk_prcmu_is_enabled,
.recalc_rate = clk_prcmu_recalc_rate,
};
static struct clk *clk_reg_prcmu(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long rate,
unsigned long flags,
struct clk_ops *clk_prcmu_ops)
{
struct clk_prcmu *clk;
struct clk_init_data clk_prcmu_init;
struct clk *clk_reg;
if (!name) {
pr_err("clk_prcmu: %s invalid arguments passed\n", __func__);
return ERR_PTR(-EINVAL);
}
clk = kzalloc(sizeof(struct clk_prcmu), GFP_KERNEL);
if (!clk) {
pr_err("clk_prcmu: %s could not allocate clk\n", __func__);
return ERR_PTR(-ENOMEM);
}
clk->cg_sel = cg_sel;
clk->is_enabled = 1;
/* "rate" can be used for changing the initial frequency */
if (rate)
prcmu_set_clock_rate(cg_sel, rate);
clk_prcmu_init.name = name;
clk_prcmu_init.ops = clk_prcmu_ops;
clk_prcmu_init.flags = flags;
clk_prcmu_init.parent_names = (parent_name ? &parent_name : NULL);
clk_prcmu_init.num_parents = (parent_name ? 1 : 0);
clk->hw.init = &clk_prcmu_init;
clk_reg = clk_register(NULL, &clk->hw);
if (IS_ERR_OR_NULL(clk_reg))
goto free_clk;
return clk_reg;
free_clk:
kfree(clk);
pr_err("clk_prcmu: %s failed to register clk\n", __func__);
return ERR_PTR(-ENOMEM);
}
struct clk *clk_reg_prcmu_scalable(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long rate,
unsigned long flags)
{
return clk_reg_prcmu(name, parent_name, cg_sel, rate, flags,
&clk_prcmu_scalable_ops);
}
struct clk *clk_reg_prcmu_gate(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long flags)
{
return clk_reg_prcmu(name, parent_name, cg_sel, 0, flags,
&clk_prcmu_gate_ops);
}
struct clk *clk_reg_prcmu_rate(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long flags)
{
return clk_reg_prcmu(name, parent_name, cg_sel, 0, flags,
&clk_prcmu_rate_ops);
}
struct clk *clk_reg_prcmu_opp_gate(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long flags)
{
return clk_reg_prcmu(name, parent_name, cg_sel, 0, flags,
&clk_prcmu_opp_gate_ops);
}

48
drivers/clk/ux500/clk.h Normal file
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/*
* Clocks for ux500 platforms
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#ifndef __UX500_CLK_H
#define __UX500_CLK_H
#include <linux/clk.h>
struct clk *clk_reg_prcc_pclk(const char *name,
const char *parent_name,
unsigned int phy_base,
u32 cg_sel,
unsigned long flags);
struct clk *clk_reg_prcc_kclk(const char *name,
const char *parent_name,
unsigned int phy_base,
u32 cg_sel,
unsigned long flags);
struct clk *clk_reg_prcmu_scalable(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long rate,
unsigned long flags);
struct clk *clk_reg_prcmu_gate(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long flags);
struct clk *clk_reg_prcmu_rate(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long flags);
struct clk *clk_reg_prcmu_opp_gate(const char *name,
const char *parent_name,
u8 cg_sel,
unsigned long flags);
#endif /* __UX500_CLK_H */

477
drivers/clk/ux500/u8500_clk.c Normal file
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/*
* Clock definitions for u8500 platform.
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/platform_data/clk-ux500.h>
#include "clk.h"
void u8500_clk_init(void)
{
struct prcmu_fw_version *fw_version;
const char *sgaclk_parent = NULL;
struct clk *clk;
/* Clock sources */
clk = clk_reg_prcmu_gate("soc0_pll", NULL, PRCMU_PLLSOC0,
CLK_IS_ROOT|CLK_IGNORE_UNUSED);
clk_register_clkdev(clk, "soc0_pll", NULL);
clk = clk_reg_prcmu_gate("soc1_pll", NULL, PRCMU_PLLSOC1,
CLK_IS_ROOT|CLK_IGNORE_UNUSED);
clk_register_clkdev(clk, "soc1_pll", NULL);
clk = clk_reg_prcmu_gate("ddr_pll", NULL, PRCMU_PLLDDR,
CLK_IS_ROOT|CLK_IGNORE_UNUSED);
clk_register_clkdev(clk, "ddr_pll", NULL);
/* FIXME: Add sys, ulp and int clocks here. */
clk = clk_register_fixed_rate(NULL, "rtc32k", "NULL",
CLK_IS_ROOT|CLK_IGNORE_UNUSED,
32768);
clk_register_clkdev(clk, "clk32k", NULL);
clk_register_clkdev(clk, NULL, "rtc-pl031");
/* PRCMU clocks */
fw_version = prcmu_get_fw_version();
if (fw_version != NULL) {
switch (fw_version->project) {
case PRCMU_FW_PROJECT_U8500_C2:
case PRCMU_FW_PROJECT_U8520:
case PRCMU_FW_PROJECT_U8420:
sgaclk_parent = "soc0_pll";
break;
default:
break;
}
}
if (sgaclk_parent)
clk = clk_reg_prcmu_gate("sgclk", sgaclk_parent,
PRCMU_SGACLK, 0);
else
clk = clk_reg_prcmu_gate("sgclk", NULL,
PRCMU_SGACLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "mali");
clk = clk_reg_prcmu_gate("uartclk", NULL, PRCMU_UARTCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "UART");
clk = clk_reg_prcmu_gate("msp02clk", NULL, PRCMU_MSP02CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "MSP02");
clk = clk_reg_prcmu_gate("msp1clk", NULL, PRCMU_MSP1CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "MSP1");
clk = clk_reg_prcmu_gate("i2cclk", NULL, PRCMU_I2CCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "I2C");
clk = clk_reg_prcmu_gate("slimclk", NULL, PRCMU_SLIMCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "slim");
clk = clk_reg_prcmu_gate("per1clk", NULL, PRCMU_PER1CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "PERIPH1");
clk = clk_reg_prcmu_gate("per2clk", NULL, PRCMU_PER2CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "PERIPH2");
clk = clk_reg_prcmu_gate("per3clk", NULL, PRCMU_PER3CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "PERIPH3");
clk = clk_reg_prcmu_gate("per5clk", NULL, PRCMU_PER5CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "PERIPH5");
clk = clk_reg_prcmu_gate("per6clk", NULL, PRCMU_PER6CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "PERIPH6");
clk = clk_reg_prcmu_gate("per7clk", NULL, PRCMU_PER7CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "PERIPH7");
clk = clk_reg_prcmu_scalable("lcdclk", NULL, PRCMU_LCDCLK, 0,
CLK_IS_ROOT|CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "lcd");
clk_register_clkdev(clk, "lcd", "mcde");
clk = clk_reg_prcmu_opp_gate("bmlclk", NULL, PRCMU_BMLCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "bml");
clk = clk_reg_prcmu_scalable("hsitxclk", NULL, PRCMU_HSITXCLK, 0,
CLK_IS_ROOT|CLK_SET_RATE_GATE);
clk = clk_reg_prcmu_scalable("hsirxclk", NULL, PRCMU_HSIRXCLK, 0,
CLK_IS_ROOT|CLK_SET_RATE_GATE);
clk = clk_reg_prcmu_scalable("hdmiclk", NULL, PRCMU_HDMICLK, 0,
CLK_IS_ROOT|CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "hdmi");
clk_register_clkdev(clk, "hdmi", "mcde");
clk = clk_reg_prcmu_gate("apeatclk", NULL, PRCMU_APEATCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "apeat");
clk = clk_reg_prcmu_gate("apetraceclk", NULL, PRCMU_APETRACECLK,
CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "apetrace");
clk = clk_reg_prcmu_gate("mcdeclk", NULL, PRCMU_MCDECLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "mcde");
clk_register_clkdev(clk, "mcde", "mcde");
clk_register_clkdev(clk, "dsisys", "dsilink.0");
clk_register_clkdev(clk, "dsisys", "dsilink.1");
clk_register_clkdev(clk, "dsisys", "dsilink.2");
clk = clk_reg_prcmu_opp_gate("ipi2cclk", NULL, PRCMU_IPI2CCLK,
CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "ipi2");
clk = clk_reg_prcmu_gate("dsialtclk", NULL, PRCMU_DSIALTCLK,
CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "dsialt");
clk = clk_reg_prcmu_gate("dmaclk", NULL, PRCMU_DMACLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "dma40.0");
clk = clk_reg_prcmu_gate("b2r2clk", NULL, PRCMU_B2R2CLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "b2r2");
clk_register_clkdev(clk, NULL, "b2r2_core");
clk_register_clkdev(clk, NULL, "U8500-B2R2.0");
clk = clk_reg_prcmu_scalable("tvclk", NULL, PRCMU_TVCLK, 0,
CLK_IS_ROOT|CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "tv");
clk_register_clkdev(clk, "tv", "mcde");
clk = clk_reg_prcmu_gate("sspclk", NULL, PRCMU_SSPCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "SSP");
clk = clk_reg_prcmu_gate("rngclk", NULL, PRCMU_RNGCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "rngclk");
clk = clk_reg_prcmu_gate("uiccclk", NULL, PRCMU_UICCCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "uicc");
/*
* FIXME: The MTU clocks might need some kind of "parent muxed join"
* and these have no K-clocks. For now, we ignore the missing
* connection to the corresponding P-clocks, p6_mtu0_clk and
* p6_mtu1_clk. Instead timclk is used which is the valid parent.
*/
clk = clk_reg_prcmu_gate("timclk", NULL, PRCMU_TIMCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "mtu0");
clk_register_clkdev(clk, NULL, "mtu1");
clk = clk_reg_prcmu_gate("sdmmcclk", NULL, PRCMU_SDMMCCLK, CLK_IS_ROOT);
clk_register_clkdev(clk, NULL, "sdmmc");
clk = clk_reg_prcmu_scalable("dsi_pll", "hdmiclk",
PRCMU_PLLDSI, 0, CLK_SET_RATE_GATE);
clk_register_clkdev(clk, "dsihs2", "mcde");
clk_register_clkdev(clk, "dsihs2", "dsilink.2");
clk = clk_reg_prcmu_scalable("dsi0clk", "dsi_pll",
PRCMU_DSI0CLK, 0, CLK_SET_RATE_GATE);
clk_register_clkdev(clk, "dsihs0", "mcde");
clk_register_clkdev(clk, "dsihs0", "dsilink.0");
clk = clk_reg_prcmu_scalable("dsi1clk", "dsi_pll",
PRCMU_DSI1CLK, 0, CLK_SET_RATE_GATE);
clk_register_clkdev(clk, "dsihs1", "mcde");
clk_register_clkdev(clk, "dsihs1", "dsilink.1");
clk = clk_reg_prcmu_scalable("dsi0escclk", "tvclk",
PRCMU_DSI0ESCCLK, 0, CLK_SET_RATE_GATE);
clk_register_clkdev(clk, "dsilp0", "dsilink.0");
clk_register_clkdev(clk, "dsilp0", "mcde");
clk = clk_reg_prcmu_scalable("dsi1escclk", "tvclk",
PRCMU_DSI1ESCCLK, 0, CLK_SET_RATE_GATE);
clk_register_clkdev(clk, "dsilp1", "dsilink.1");
clk_register_clkdev(clk, "dsilp1", "mcde");
clk = clk_reg_prcmu_scalable("dsi2escclk", "tvclk",
PRCMU_DSI2ESCCLK, 0, CLK_SET_RATE_GATE);
clk_register_clkdev(clk, "dsilp2", "dsilink.2");
clk_register_clkdev(clk, "dsilp2", "mcde");
clk = clk_reg_prcmu_rate("smp_twd", NULL, PRCMU_ARMSS,
CLK_IS_ROOT|CLK_GET_RATE_NOCACHE|
CLK_IGNORE_UNUSED);
clk_register_clkdev(clk, NULL, "smp_twd");
/*
* FIXME: Add special handled PRCMU clocks here:
* 1. clk_arm, use PRCMU_ARMCLK.
* 2. clkout0yuv, use PRCMU as parent + need regulator + pinctrl.
* 3. ab9540_clkout1yuv, see clkout0yuv
*/
/* PRCC P-clocks */
clk = clk_reg_prcc_pclk("p1_pclk0", "per1clk", U8500_CLKRST1_BASE,
BIT(0), 0);
clk_register_clkdev(clk, "apb_pclk", "uart0");
clk = clk_reg_prcc_pclk("p1_pclk1", "per1clk", U8500_CLKRST1_BASE,
BIT(1), 0);
clk_register_clkdev(clk, "apb_pclk", "uart1");
clk = clk_reg_prcc_pclk("p1_pclk2", "per1clk", U8500_CLKRST1_BASE,
BIT(2), 0);
clk = clk_reg_prcc_pclk("p1_pclk3", "per1clk", U8500_CLKRST1_BASE,
BIT(3), 0);
clk = clk_reg_prcc_pclk("p1_pclk4", "per1clk", U8500_CLKRST1_BASE,
BIT(4), 0);
clk = clk_reg_prcc_pclk("p1_pclk5", "per1clk", U8500_CLKRST1_BASE,
BIT(5), 0);
clk_register_clkdev(clk, "apb_pclk", "sdi0");
clk = clk_reg_prcc_pclk("p1_pclk6", "per1clk", U8500_CLKRST1_BASE,
BIT(6), 0);
clk = clk_reg_prcc_pclk("p1_pclk7", "per1clk", U8500_CLKRST1_BASE,
BIT(7), 0);
clk_register_clkdev(clk, NULL, "spi3");
clk = clk_reg_prcc_pclk("p1_pclk8", "per1clk", U8500_CLKRST1_BASE,
BIT(8), 0);
clk = clk_reg_prcc_pclk("p1_pclk9", "per1clk", U8500_CLKRST1_BASE,
BIT(9), 0);
clk_register_clkdev(clk, NULL, "gpio.0");
clk_register_clkdev(clk, NULL, "gpio.1");
clk_register_clkdev(clk, NULL, "gpioblock0");
clk = clk_reg_prcc_pclk("p1_pclk10", "per1clk", U8500_CLKRST1_BASE,
BIT(10), 0);
clk = clk_reg_prcc_pclk("p1_pclk11", "per1clk", U8500_CLKRST1_BASE,
BIT(11), 0);
clk = clk_reg_prcc_pclk("p2_pclk0", "per2clk", U8500_CLKRST2_BASE,
BIT(0), 0);
clk = clk_reg_prcc_pclk("p2_pclk1", "per2clk", U8500_CLKRST2_BASE,
BIT(1), 0);
clk_register_clkdev(clk, NULL, "spi2");
clk = clk_reg_prcc_pclk("p2_pclk2", "per2clk", U8500_CLKRST2_BASE,
BIT(2), 0);
clk_register_clkdev(clk, NULL, "spi1");
clk = clk_reg_prcc_pclk("p2_pclk3", "per2clk", U8500_CLKRST2_BASE,
BIT(3), 0);
clk_register_clkdev(clk, NULL, "pwl");
clk = clk_reg_prcc_pclk("p2_pclk4", "per2clk", U8500_CLKRST2_BASE,
BIT(4), 0);
clk_register_clkdev(clk, "apb_pclk", "sdi4");
clk = clk_reg_prcc_pclk("p2_pclk5", "per2clk", U8500_CLKRST2_BASE,
BIT(5), 0);
clk = clk_reg_prcc_pclk("p2_pclk6", "per2clk", U8500_CLKRST2_BASE,
BIT(6), 0);
clk_register_clkdev(clk, "apb_pclk", "sdi1");
clk = clk_reg_prcc_pclk("p2_pclk7", "per2clk", U8500_CLKRST2_BASE,
BIT(7), 0);
clk_register_clkdev(clk, "apb_pclk", "sdi3");
clk = clk_reg_prcc_pclk("p2_pclk8", "per2clk", U8500_CLKRST2_BASE,
BIT(8), 0);
clk_register_clkdev(clk, NULL, "spi0");
clk = clk_reg_prcc_pclk("p2_pclk9", "per2clk", U8500_CLKRST2_BASE,
BIT(9), 0);
clk_register_clkdev(clk, "hsir_hclk", "ste_hsi.0");
clk = clk_reg_prcc_pclk("p2_pclk10", "per2clk", U8500_CLKRST2_BASE,
BIT(10), 0);
clk_register_clkdev(clk, "hsit_hclk", "ste_hsi.0");
clk = clk_reg_prcc_pclk("p2_pclk11", "per2clk", U8500_CLKRST2_BASE,
BIT(11), 0);
clk_register_clkdev(clk, NULL, "gpio.6");
clk_register_clkdev(clk, NULL, "gpio.7");
clk_register_clkdev(clk, NULL, "gpioblock1");
clk = clk_reg_prcc_pclk("p2_pclk12", "per2clk", U8500_CLKRST2_BASE,
BIT(11), 0);
clk = clk_reg_prcc_pclk("p3_pclk0", "per3clk", U8500_CLKRST3_BASE,
BIT(0), 0);
clk_register_clkdev(clk, NULL, "fsmc");
clk = clk_reg_prcc_pclk("p3_pclk1", "per3clk", U8500_CLKRST3_BASE,
BIT(1), 0);
clk = clk_reg_prcc_pclk("p3_pclk2", "per3clk", U8500_CLKRST3_BASE,
BIT(2), 0);
clk = clk_reg_prcc_pclk("p3_pclk3", "per3clk", U8500_CLKRST3_BASE,
BIT(3), 0);
clk = clk_reg_prcc_pclk("p3_pclk4", "per3clk", U8500_CLKRST3_BASE,
BIT(4), 0);
clk_register_clkdev(clk, "apb_pclk", "sdi2");
clk = clk_reg_prcc_pclk("p3_pclk5", "per3clk", U8500_CLKRST3_BASE,
BIT(5), 0);
clk = clk_reg_prcc_pclk("p3_pclk6", "per3clk", U8500_CLKRST3_BASE,
BIT(6), 0);
clk_register_clkdev(clk, "apb_pclk", "uart2");
clk = clk_reg_prcc_pclk("p3_pclk7", "per3clk", U8500_CLKRST3_BASE,
BIT(7), 0);
clk_register_clkdev(clk, "apb_pclk", "sdi5");
clk = clk_reg_prcc_pclk("p3_pclk8", "per3clk", U8500_CLKRST3_BASE,
BIT(8), 0);
clk_register_clkdev(clk, NULL, "gpio.2");
clk_register_clkdev(clk, NULL, "gpio.3");
clk_register_clkdev(clk, NULL, "gpio.4");
clk_register_clkdev(clk, NULL, "gpio.5");
clk_register_clkdev(clk, NULL, "gpioblock2");
clk = clk_reg_prcc_pclk("p5_pclk0", "per5clk", U8500_CLKRST5_BASE,
BIT(0), 0);
clk_register_clkdev(clk, "usb", "musb-ux500.0");
clk = clk_reg_prcc_pclk("p5_pclk1", "per5clk", U8500_CLKRST5_BASE,
BIT(1), 0);
clk_register_clkdev(clk, NULL, "gpio.8");
clk_register_clkdev(clk, NULL, "gpioblock3");
clk = clk_reg_prcc_pclk("p6_pclk0", "per6clk", U8500_CLKRST6_BASE,
BIT(0), 0);
clk = clk_reg_prcc_pclk("p6_pclk1", "per6clk", U8500_CLKRST6_BASE,
BIT(1), 0);
clk_register_clkdev(clk, NULL, "cryp0");
clk_register_clkdev(clk, NULL, "cryp1");
clk = clk_reg_prcc_pclk("p6_pclk2", "per6clk", U8500_CLKRST6_BASE,
BIT(2), 0);
clk_register_clkdev(clk, NULL, "hash0");
clk = clk_reg_prcc_pclk("p6_pclk3", "per6clk", U8500_CLKRST6_BASE,
BIT(3), 0);
clk_register_clkdev(clk, NULL, "pka");
clk = clk_reg_prcc_pclk("p6_pclk4", "per6clk", U8500_CLKRST6_BASE,
BIT(4), 0);
clk_register_clkdev(clk, NULL, "hash1");
clk = clk_reg_prcc_pclk("p6_pclk5", "per6clk", U8500_CLKRST6_BASE,
BIT(5), 0);
clk_register_clkdev(clk, NULL, "cfgreg");
clk = clk_reg_prcc_pclk("p6_pclk6", "per6clk", U8500_CLKRST6_BASE,
BIT(6), 0);
clk = clk_reg_prcc_pclk("p6_pclk7", "per6clk", U8500_CLKRST6_BASE,
BIT(7), 0);
/* PRCC K-clocks
*
* FIXME: Some drivers requires PERPIH[n| to be automatically enabled
* by enabling just the K-clock, even if it is not a valid parent to
* the K-clock. Until drivers get fixed we might need some kind of
* "parent muxed join".
*/
/* Periph1 */
clk = clk_reg_prcc_kclk("p1_uart0_kclk", "uartclk",
U8500_CLKRST1_BASE, BIT(0), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "uart0");
clk = clk_reg_prcc_kclk("p1_uart1_kclk", "uartclk",
U8500_CLKRST1_BASE, BIT(1), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "uart1");
clk = clk_reg_prcc_kclk("p1_i2c1_kclk", "i2cclk",
U8500_CLKRST1_BASE, BIT(2), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p1_msp0_kclk", "msp02clk",
U8500_CLKRST1_BASE, BIT(3), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p1_msp1_kclk", "msp1clk",
U8500_CLKRST1_BASE, BIT(4), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p1_sdi0_kclk", "sdmmcclk",
U8500_CLKRST1_BASE, BIT(5), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "sdi0");
clk = clk_reg_prcc_kclk("p1_i2c2_kclk", "i2cclk",
U8500_CLKRST1_BASE, BIT(6), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p1_slimbus0_kclk", "slimclk",
U8500_CLKRST1_BASE, BIT(3), CLK_SET_RATE_GATE);
/* FIXME: Redefinition of BIT(3). */
clk = clk_reg_prcc_kclk("p1_i2c4_kclk", "i2cclk",
U8500_CLKRST1_BASE, BIT(9), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p1_msp3_kclk", "msp1clk",
U8500_CLKRST1_BASE, BIT(10), CLK_SET_RATE_GATE);
/* Periph2 */
clk = clk_reg_prcc_kclk("p2_i2c3_kclk", "i2cclk",
U8500_CLKRST2_BASE, BIT(0), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p2_sdi4_kclk", "sdmmcclk",
U8500_CLKRST2_BASE, BIT(2), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "sdi4");
clk = clk_reg_prcc_kclk("p2_msp2_kclk", "msp02clk",
U8500_CLKRST2_BASE, BIT(3), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p2_sdi1_kclk", "sdmmcclk",
U8500_CLKRST2_BASE, BIT(4), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "sdi1");
clk = clk_reg_prcc_kclk("p2_sdi3_kclk", "sdmmcclk",
U8500_CLKRST2_BASE, BIT(5), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "sdi3");
/* Note that rate is received from parent. */
clk = clk_reg_prcc_kclk("p2_ssirx_kclk", "hsirxclk",
U8500_CLKRST2_BASE, BIT(6),
CLK_SET_RATE_GATE|CLK_SET_RATE_PARENT);
clk = clk_reg_prcc_kclk("p2_ssitx_kclk", "hsitxclk",
U8500_CLKRST2_BASE, BIT(7),
CLK_SET_RATE_GATE|CLK_SET_RATE_PARENT);
/* Periph3 */
clk = clk_reg_prcc_kclk("p3_ssp0_kclk", "sspclk",
U8500_CLKRST3_BASE, BIT(1), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p3_ssp1_kclk", "sspclk",
U8500_CLKRST3_BASE, BIT(2), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p3_i2c0_kclk", "i2cclk",
U8500_CLKRST3_BASE, BIT(3), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p3_sdi2_kclk", "sdmmcclk",
U8500_CLKRST3_BASE, BIT(4), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "sdi2");
clk = clk_reg_prcc_kclk("p3_ske_kclk", "rtc32k",
U8500_CLKRST3_BASE, BIT(5), CLK_SET_RATE_GATE);
clk = clk_reg_prcc_kclk("p3_uart2_kclk", "uartclk",
U8500_CLKRST3_BASE, BIT(6), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "uart2");
clk = clk_reg_prcc_kclk("p3_sdi5_kclk", "sdmmcclk",
U8500_CLKRST3_BASE, BIT(7), CLK_SET_RATE_GATE);
clk_register_clkdev(clk, NULL, "sdi5");
/* Periph6 */
clk = clk_reg_prcc_kclk("p3_rng_kclk", "rngclk",
U8500_CLKRST6_BASE, BIT(0), CLK_SET_RATE_GATE);
}

21
drivers/clk/ux500/u8540_clk.c Normal file
View File

@ -0,0 +1,21 @@
/*
* Clock definitions for u8540 platform.
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/platform_data/clk-ux500.h>
#include "clk.h"
void u8540_clk_init(void)
{
/* register clocks here */
}

21
drivers/clk/ux500/u9540_clk.c Normal file
View File

@ -0,0 +1,21 @@
/*
* Clock definitions for u9540 platform.
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/platform_data/clk-ux500.h>
#include "clk.h"
void u9540_clk_init(void)
{
/* register clocks here */
}

1
drivers/clk/versatile/Makefile
View File

@ -1,3 +1,4 @@
# Makefile for Versatile-specific clocks
obj-$(CONFIG_ICST) += clk-icst.o
obj-$(CONFIG_ARCH_INTEGRATOR) += clk-integrator.o
obj-$(CONFIG_ARCH_REALVIEW) += clk-realview.o

114
drivers/clk/versatile/clk-realview.c Normal file
View File

@ -0,0 +1,114 @@
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/clk-provider.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include "clk-icst.h"
/*
* Implementation of the ARM RealView clock trees.
*/
static void __iomem *sys_lock;
static void __iomem *sys_vcoreg;
/**
* realview_oscvco_get() - get ICST OSC settings for the RealView
*/
static struct icst_vco realview_oscvco_get(void)
{
u32 val;
struct icst_vco vco;
val = readl(sys_vcoreg);
vco.v = val & 0x1ff;
vco.r = (val >> 9) & 0x7f;
vco.s = (val >> 16) & 03;
return vco;
}
static void realview_oscvco_set(struct icst_vco vco)
{
u32 val;
val = readl(sys_vcoreg) & ~0x7ffff;
val |= vco.v | (vco.r << 9) | (vco.s << 16);
/* This magic unlocks the CM VCO so it can be controlled */
writel(0xa05f, sys_lock);
writel(val, sys_vcoreg);
/* This locks the CM again */
writel(0, sys_lock);
}
static const struct icst_params realview_oscvco_params = {
.ref = 24000000,
.vco_max = ICST307_VCO_MAX,
.vco_min = ICST307_VCO_MIN,
.vd_min = 4 + 8,
.vd_max = 511 + 8,
.rd_min = 1 + 2,
.rd_max = 127 + 2,
.s2div = icst307_s2div,
.idx2s = icst307_idx2s,
};
static const struct clk_icst_desc __initdata realview_icst_desc = {
.params = &realview_oscvco_params,
.getvco = realview_oscvco_get,
.setvco = realview_oscvco_set,
};
/*
* realview_clk_init() - set up the RealView clock tree
*/
void __init realview_clk_init(void __iomem *sysbase, bool is_pb1176)
{
struct clk *clk;
sys_lock = sysbase + REALVIEW_SYS_LOCK_OFFSET;
if (is_pb1176)
sys_vcoreg = sysbase + REALVIEW_SYS_OSC0_OFFSET;
else
sys_vcoreg = sysbase + REALVIEW_SYS_OSC4_OFFSET;
/* APB clock dummy */
clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
clk_register_clkdev(clk, "apb_pclk", NULL);
/* 24 MHz clock */
clk = clk_register_fixed_rate(NULL, "clk24mhz", NULL, CLK_IS_ROOT,
24000000);
clk_register_clkdev(clk, NULL, "dev:uart0");
clk_register_clkdev(clk, NULL, "dev:uart1");
clk_register_clkdev(clk, NULL, "dev:uart2");
clk_register_clkdev(clk, NULL, "fpga:kmi0");
clk_register_clkdev(clk, NULL, "fpga:kmi1");
clk_register_clkdev(clk, NULL, "fpga:mmc0");
clk_register_clkdev(clk, NULL, "dev:ssp0");
if (is_pb1176) {
/*
* UART3 is on the dev chip in PB1176
* UART4 only exists in PB1176
*/
clk_register_clkdev(clk, NULL, "dev:uart3");
clk_register_clkdev(clk, NULL, "dev:uart4");
} else
clk_register_clkdev(clk, NULL, "fpga:uart3");
/* 1 MHz clock */
clk = clk_register_fixed_rate(NULL, "clk1mhz", NULL, CLK_IS_ROOT,
1000000);
clk_register_clkdev(clk, NULL, "sp804");
/* ICST VCO clock */
clk = icst_clk_register(NULL, &realview_icst_desc);
clk_register_clkdev(clk, NULL, "dev:clcd");
clk_register_clkdev(clk, NULL, "issp:clcd");
}

42
drivers/mfd/db8500-prcmu.c
View File

@ -418,6 +418,9 @@ static struct {
static atomic_t ac_wake_req_state = ATOMIC_INIT(0);
/* Functions definition */
static void compute_armss_rate(void);
/* Spinlocks */
static DEFINE_SPINLOCK(prcmu_lock);
static DEFINE_SPINLOCK(clkout_lock);
@ -517,6 +520,7 @@ static struct dsiescclk dsiescclk[3] = {
}
};
/*
* Used by MCDE to setup all necessary PRCMU registers
*/
@ -1013,6 +1017,7 @@ int db8500_prcmu_set_arm_opp(u8 opp)
(mb1_transfer.ack.arm_opp != opp))
r = -EIO;
compute_armss_rate();
mutex_unlock(&mb1_transfer.lock);
return r;
@ -1612,6 +1617,7 @@ static unsigned long pll_rate(void __iomem *reg, unsigned long src_rate,
if ((branch == PLL_FIX) || ((branch == PLL_DIV) &&
(val & PRCM_PLL_FREQ_DIV2EN) &&
((reg == PRCM_PLLSOC0_FREQ) ||
(reg == PRCM_PLLARM_FREQ) ||
(reg == PRCM_PLLDDR_FREQ))))
div *= 2;
@ -1661,6 +1667,39 @@ static unsigned long clock_rate(u8 clock)
else
return 0;
}
static unsigned long latest_armss_rate;
static unsigned long armss_rate(void)
{
return latest_armss_rate;
}
static void compute_armss_rate(void)
{
u32 r;
unsigned long rate;
r = readl(PRCM_ARM_CHGCLKREQ);
if (r & PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ) {
/* External ARMCLKFIX clock */
rate = pll_rate(PRCM_PLLDDR_FREQ, ROOT_CLOCK_RATE, PLL_FIX);
/* Check PRCM_ARM_CHGCLKREQ divider */
if (!(r & PRCM_ARM_CHGCLKREQ_PRCM_ARM_DIVSEL))
rate /= 2;
/* Check PRCM_ARMCLKFIX_MGT divider */
r = readl(PRCM_ARMCLKFIX_MGT);
r &= PRCM_CLK_MGT_CLKPLLDIV_MASK;
rate /= r;
} else {/* ARM PLL */
rate = pll_rate(PRCM_PLLARM_FREQ, ROOT_CLOCK_RATE, PLL_DIV);
}
latest_armss_rate = rate;
}
static unsigned long dsiclk_rate(u8 n)
{
@ -1707,6 +1746,8 @@ unsigned long prcmu_clock_rate(u8 clock)
return pll_rate(PRCM_PLLSOC0_FREQ, ROOT_CLOCK_RATE, PLL_RAW);
else if (clock == PRCMU_PLLSOC1)
return pll_rate(PRCM_PLLSOC1_FREQ, ROOT_CLOCK_RATE, PLL_RAW);
else if (clock == PRCMU_ARMSS)
return armss_rate();
else if (clock == PRCMU_PLLDDR)
return pll_rate(PRCM_PLLDDR_FREQ, ROOT_CLOCK_RATE, PLL_RAW);
else if (clock == PRCMU_PLLDSI)
@ -2693,6 +2734,7 @@ void __init db8500_prcmu_early_init(void)
handle_simple_irq);
set_irq_flags(irq, IRQF_VALID);
}
compute_armss_rate();
}
static void __init init_prcm_registers(void)

4
drivers/mfd/dbx500-prcmu-regs.h
View File

@ -61,7 +61,8 @@
#define PRCM_PLLARM_LOCKP_PRCM_PLLARM_LOCKP3 0x2
#define PRCM_ARM_CHGCLKREQ (_PRCMU_BASE + 0x114)
#define PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ 0x1
#define PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ BIT(0)
#define PRCM_ARM_CHGCLKREQ_PRCM_ARM_DIVSEL BIT(16)
#define PRCM_PLLARM_ENABLE (_PRCMU_BASE + 0x98)
#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_ENABLE 0x1
@ -140,6 +141,7 @@
/* PRCMU clock/PLL/reset registers */
#define PRCM_PLLSOC0_FREQ (_PRCMU_BASE + 0x080)
#define PRCM_PLLSOC1_FREQ (_PRCMU_BASE + 0x084)
#define PRCM_PLLARM_FREQ (_PRCMU_BASE + 0x088)
#define PRCM_PLLDDR_FREQ (_PRCMU_BASE + 0x08C)
#define PRCM_PLL_FREQ_D_SHIFT 0
#define PRCM_PLL_FREQ_D_MASK BITS(0, 7)

6
include/linux/clk-provider.h
View File

@ -26,6 +26,7 @@
#define CLK_IGNORE_UNUSED BIT(3) /* do not gate even if unused */
#define CLK_IS_ROOT BIT(4) /* root clk, has no parent */
#define CLK_IS_BASIC BIT(5) /* Basic clk, can't do a to_clk_foo() */
#define CLK_GET_RATE_NOCACHE BIT(6) /* do not use the cached clk rate */
struct clk_hw;
@ -360,6 +361,11 @@ int of_clk_add_provider(struct device_node *np,
void of_clk_del_provider(struct device_node *np);
struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
void *data);
struct clk_onecell_data {
struct clk **clks;
unsigned int clk_num;
};
struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
const char *of_clk_get_parent_name(struct device_node *np, int index);
void of_clk_init(const struct of_device_id *matches);

1
include/linux/mfd/dbx500-prcmu.h
View File

@ -136,6 +136,7 @@ enum prcmu_clock {
PRCMU_TIMCLK,
PRCMU_PLLSOC0,
PRCMU_PLLSOC1,
PRCMU_ARMSS,
PRCMU_PLLDDR,
PRCMU_PLLDSI,
PRCMU_DSI0CLK,

1
include/linux/platform_data/clk-realview.h Normal file
View File

@ -0,0 +1 @@
void realview_clk_init(void __iomem *sysbase, bool is_pb1176);

17
include/linux/platform_data/clk-ux500.h Normal file
View File

@ -0,0 +1,17 @@
/*
* Clock definitions for ux500 platforms
*
* Copyright (C) 2012 ST-Ericsson SA
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#ifndef __CLK_UX500_H
#define __CLK_UX500_H
void u8500_clk_init(void);
void u9540_clk_init(void);
void u8540_clk_init(void);
#endif /* __CLK_UX500_H */