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clk: qoriq: Add ls2080a support.

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LS2080A is the first implementation of the chassis 3 clockgen, which
has a different register layout than previous chips.  It is also little
endian, unlike previous chips.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Scott Wood 2015-09-19 23:29:55 -05:00
parent 0dfc86b317
commit 9e19ca2f62
2 changed files with 69 additions and 10 deletions
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2
drivers/clk/Kconfig
View File

@ -121,7 +121,7 @@ config COMMON_CLK_AXI_CLKGEN
config CLK_QORIQ
bool "Clock driver for Freescale QorIQ platforms"
depends on (PPC_E500MC || ARM) && OF
depends on (PPC_E500MC || ARM || ARM64) && OF
---help---
This adds the clock driver support for Freescale QorIQ platforms
using common clock framework.

77
drivers/clk/clk-qoriq.c
View File

@ -68,7 +68,10 @@ struct clockgen;
* If not set, cmux freq must be >= platform pll/2
*/
#define CG_CMUX_GE_PLAT 1
#define CG_PLL_8BIT 2 /* PLLCnGSR[CFG] is 8 bits, not 6 */
#define CG_VER3 4 /* version 3 cg: reg layout different */
#define CG_LITTLE_ENDIAN 8
struct clockgen_chipinfo {
const char *compat, *guts_compat;
@ -94,6 +97,26 @@ struct clockgen {
static struct clockgen clockgen;
static void cg_out(struct clockgen *cg, u32 val, u32 __iomem *reg)
{
if (cg->info.flags & CG_LITTLE_ENDIAN)
iowrite32(val, reg);
else
iowrite32be(val, reg);
}
static u32 cg_in(struct clockgen *cg, u32 __iomem *reg)
{
u32 val;
if (cg->info.flags & CG_LITTLE_ENDIAN)
val = ioread32(reg);
else
val = ioread32be(reg);
return val;
}
static const struct clockgen_muxinfo p2041_cmux_grp1 = {
{
[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
@ -428,6 +451,17 @@ static const struct clockgen_chipinfo chipinfo[] = {
},
.pll_mask = 0x03,
},
{
.compat = "fsl,ls2080a-clockgen",
.cmux_groups = {
&clockgen2_cmux_cga12, &clockgen2_cmux_cgb
},
.cmux_to_group = {
0, 0, 1, 1, -1
},
.pll_mask = 0x37,
.flags = CG_VER3 | CG_LITTLE_ENDIAN,
},
{
.compat = "fsl,p2041-clockgen",
.guts_compat = "fsl,qoriq-device-config-1.0",
@ -575,7 +609,7 @@ static int mux_set_parent(struct clk_hw *hw, u8 idx)
return -EINVAL;
clksel = hwc->parent_to_clksel[idx];
iowrite32be((clksel << CLKSEL_SHIFT) & CLKSEL_MASK, hwc->reg);
cg_out(hwc->cg, (clksel << CLKSEL_SHIFT) & CLKSEL_MASK, hwc->reg);
return 0;
}
@ -586,7 +620,7 @@ static u8 mux_get_parent(struct clk_hw *hw)
u32 clksel;
s8 ret;
clksel = (ioread32be(hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
clksel = (cg_in(hwc->cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
ret = hwc->clksel_to_parent[clksel];
if (ret < 0) {
@ -705,7 +739,7 @@ static struct clk * __init create_one_cmux(struct clockgen *cg, int idx)
* default clksel) may be inappropriately excluded on certain
* chips.
*/
clksel = (ioread32be(hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
clksel = (cg_in(cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
div = get_pll_div(cg, hwc, clksel);
if (!div)
return NULL;
@ -874,13 +908,36 @@ static void __init create_one_pll(struct clockgen *cg, int idx)
if (!(cg->info.pll_mask & (1 << idx)))
return;
if (idx == PLATFORM_PLL)
reg = cg->regs + 0xc00;
else
reg = cg->regs + 0x800 + 0x20 * (idx - 1);
if (cg->info.flags & CG_VER3) {
switch (idx) {
case PLATFORM_PLL:
reg = cg->regs + 0x60080;
break;
case CGA_PLL1:
reg = cg->regs + 0x80;
break;
case CGA_PLL2:
reg = cg->regs + 0xa0;
break;
case CGB_PLL1:
reg = cg->regs + 0x10080;
break;
case CGB_PLL2:
reg = cg->regs + 0x100a0;
break;
default:
WARN_ONCE(1, "index %d\n", idx);
return;
}
} else {
if (idx == PLATFORM_PLL)
reg = cg->regs + 0xc00;
else
reg = cg->regs + 0x800 + 0x20 * (idx - 1);
}
/* Get the multiple of PLL */
mult = ioread32be(reg);
mult = cg_in(cg, reg);
/* Check if this PLL is disabled */
if (mult & PLL_KILL) {
@ -888,7 +945,8 @@ static void __init create_one_pll(struct clockgen *cg, int idx)
return;
}
if ((cg->info.flags & CG_PLL_8BIT) && idx != PLATFORM_PLL)
if ((cg->info.flags & CG_VER3) ||
((cg->info.flags & CG_PLL_8BIT) && idx != PLATFORM_PLL))
mult = (mult & GENMASK(8, 1)) >> 1;
else
mult = (mult & GENMASK(6, 1)) >> 1;
@ -1169,6 +1227,7 @@ static void __init clockgen_init(struct device_node *np)
CLK_OF_DECLARE(qoriq_clockgen_1, "fsl,qoriq-clockgen-1.0", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_2, "fsl,qoriq-clockgen-2.0", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_ls1021a, "fsl,ls1021a-clockgen", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_ls2080a, "fsl,ls2080a-clockgen", clockgen_init);
/* Legacy nodes */
CLK_OF_DECLARE(qoriq_sysclk_1, "fsl,qoriq-sysclk-1.0", sysclk_init);