linux_dsm_epyc7002/drivers/clk/sunxi-ng/ccu_mux.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 Maxime Ripard
* Maxime Ripard <maxime.ripard@free-electrons.com>
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
clk: Remove io.h from clk-provider.h Now that we've gotten rid of clk_readl() we can remove io.h from the clk-provider header and push out the io.h include to any code that isn't already including the io.h header but using things like readl/writel, etc. Found with this grep: git grep -l clk-provider.h | grep '.c$' | xargs git grep -L 'linux/io.h' | \ xargs git grep -l \ -e '\<__iowrite32_copy\>' --or \ -e '\<__ioread32_copy\>' --or \ -e '\<__iowrite64_copy\>' --or \ -e '\<ioremap_page_range\>' --or \ -e '\<ioremap_huge_init\>' --or \ -e '\<arch_ioremap_pud_supported\>' --or \ -e '\<arch_ioremap_pmd_supported\>' --or \ -e '\<devm_ioport_map\>' --or \ -e '\<devm_ioport_unmap\>' --or \ -e '\<IOMEM_ERR_PTR\>' --or \ -e '\<devm_ioremap\>' --or \ -e '\<devm_ioremap_nocache\>' --or \ -e '\<devm_ioremap_wc\>' --or \ -e '\<devm_iounmap\>' --or \ -e '\<devm_ioremap_release\>' --or \ -e '\<devm_memremap\>' --or \ -e '\<devm_memunmap\>' --or \ -e '\<__devm_memremap_pages\>' --or \ -e '\<pci_remap_cfgspace\>' --or \ -e '\<arch_has_dev_port\>' --or \ -e '\<arch_phys_wc_add\>' --or \ -e '\<arch_phys_wc_del\>' --or \ -e '\<memremap\>' --or \ -e '\<memunmap\>' --or \ -e '\<arch_io_reserve_memtype_wc\>' --or \ -e '\<arch_io_free_memtype_wc\>' --or \ -e '\<__io_aw\>' --or \ -e '\<__io_pbw\>' --or \ -e '\<__io_paw\>' --or \ -e '\<__io_pbr\>' --or \ -e '\<__io_par\>' --or \ -e '\<__raw_readb\>' --or \ -e '\<__raw_readw\>' --or \ -e '\<__raw_readl\>' --or \ -e '\<__raw_readq\>' --or \ -e '\<__raw_writeb\>' --or \ -e '\<__raw_writew\>' --or \ -e '\<__raw_writel\>' --or \ -e '\<__raw_writeq\>' --or \ -e '\<readb\>' --or \ -e '\<readw\>' --or \ -e '\<readl\>' --or \ -e '\<readq\>' --or \ -e '\<writeb\>' --or \ -e '\<writew\>' --or \ -e '\<writel\>' --or \ -e '\<writeq\>' --or \ -e '\<readb_relaxed\>' --or \ -e '\<readw_relaxed\>' --or \ -e '\<readl_relaxed\>' --or \ -e '\<readq_relaxed\>' --or \ -e '\<writeb_relaxed\>' --or \ -e '\<writew_relaxed\>' --or \ -e '\<writel_relaxed\>' --or \ -e '\<writeq_relaxed\>' --or \ -e '\<readsb\>' --or \ -e '\<readsw\>' --or \ -e '\<readsl\>' --or \ -e '\<readsq\>' --or \ -e '\<writesb\>' --or \ -e '\<writesw\>' --or \ -e '\<writesl\>' --or \ -e '\<writesq\>' --or \ -e '\<inb\>' --or \ -e '\<inw\>' --or \ -e '\<inl\>' --or \ -e '\<outb\>' --or \ -e '\<outw\>' --or \ -e '\<outl\>' --or \ -e '\<inb_p\>' --or \ -e '\<inw_p\>' --or \ -e '\<inl_p\>' --or \ -e '\<outb_p\>' --or \ -e '\<outw_p\>' --or \ -e '\<outl_p\>' --or \ -e '\<insb\>' --or \ -e '\<insw\>' --or \ -e '\<insl\>' --or \ -e '\<outsb\>' --or \ -e '\<outsw\>' --or \ -e '\<outsl\>' --or \ -e '\<insb_p\>' --or \ -e '\<insw_p\>' --or \ -e '\<insl_p\>' --or \ -e '\<outsb_p\>' --or \ -e '\<outsw_p\>' --or \ -e '\<outsl_p\>' --or \ -e '\<ioread8\>' --or \ -e '\<ioread16\>' --or \ -e '\<ioread32\>' --or \ -e '\<ioread64\>' --or \ -e '\<iowrite8\>' --or \ -e '\<iowrite16\>' --or \ -e '\<iowrite32\>' --or \ -e '\<iowrite64\>' --or \ -e '\<ioread16be\>' --or \ -e '\<ioread32be\>' --or \ -e '\<ioread64be\>' --or \ -e '\<iowrite16be\>' --or \ -e '\<iowrite32be\>' --or \ -e '\<iowrite64be\>' --or \ -e '\<ioread8_rep\>' --or \ -e '\<ioread16_rep\>' --or \ -e '\<ioread32_rep\>' --or \ -e '\<ioread64_rep\>' --or \ -e '\<iowrite8_rep\>' --or \ -e '\<iowrite16_rep\>' --or \ -e '\<iowrite32_rep\>' --or \ -e '\<iowrite64_rep\>' --or \ -e '\<__io_virt\>' --or \ -e '\<pci_iounmap\>' --or \ -e '\<virt_to_phys\>' --or \ -e '\<phys_to_virt\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap\>' --or \ -e '\<__ioremap\>' --or \ -e '\<iounmap\>' --or \ -e '\<ioremap\>' --or \ -e '\<ioremap_nocache\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wt\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<xlate_dev_kmem_ptr\>' --or \ -e '\<xlate_dev_mem_ptr\>' --or \ -e '\<unxlate_dev_mem_ptr\>' --or \ -e '\<virt_to_bus\>' --or \ -e '\<bus_to_virt\>' --or \ -e '\<memset_io\>' --or \ -e '\<memcpy_fromio\>' --or \ -e '\<memcpy_toio\>' I also reordered a couple includes when they weren't alphabetical and removed clk.h from kona, replacing it with clk-provider.h because that driver doesn't use clk consumer APIs. Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Acked-by: Tero Kristo <t-kristo@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Cc: Chris Zankel <chris@zankel.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: John Crispin <john@phrozen.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-04-19 05:20:22 +07:00
#include <linux/io.h>
#include "ccu_gate.h"
#include "ccu_mux.h"
static u16 ccu_mux_get_prediv(struct ccu_common *common,
struct ccu_mux_internal *cm,
int parent_index)
{
u16 prediv = 1;
u32 reg;
if (!((common->features & CCU_FEATURE_FIXED_PREDIV) ||
(common->features & CCU_FEATURE_VARIABLE_PREDIV) ||
(common->features & CCU_FEATURE_ALL_PREDIV)))
return 1;
if (common->features & CCU_FEATURE_ALL_PREDIV)
return common->prediv;
reg = readl(common->base + common->reg);
if (parent_index < 0) {
parent_index = reg >> cm->shift;
parent_index &= (1 << cm->width) - 1;
}
if (common->features & CCU_FEATURE_FIXED_PREDIV) {
int i;
for (i = 0; i < cm->n_predivs; i++)
if (parent_index == cm->fixed_predivs[i].index)
prediv = cm->fixed_predivs[i].div;
}
if (common->features & CCU_FEATURE_VARIABLE_PREDIV) {
int i;
for (i = 0; i < cm->n_var_predivs; i++)
if (parent_index == cm->var_predivs[i].index) {
u8 div;
div = reg >> cm->var_predivs[i].shift;
div &= (1 << cm->var_predivs[i].width) - 1;
prediv = div + 1;
}
}
return prediv;
}
unsigned long ccu_mux_helper_apply_prediv(struct ccu_common *common,
struct ccu_mux_internal *cm,
int parent_index,
unsigned long parent_rate)
{
return parent_rate / ccu_mux_get_prediv(common, cm, parent_index);
}
static unsigned long ccu_mux_helper_unapply_prediv(struct ccu_common *common,
struct ccu_mux_internal *cm,
int parent_index,
unsigned long parent_rate)
{
return parent_rate * ccu_mux_get_prediv(common, cm, parent_index);
}
int ccu_mux_helper_determine_rate(struct ccu_common *common,
struct ccu_mux_internal *cm,
struct clk_rate_request *req,
unsigned long (*round)(struct ccu_mux_internal *,
struct clk_hw *,
unsigned long *,
unsigned long,
void *),
void *data)
{
unsigned long best_parent_rate = 0, best_rate = 0;
struct clk_hw *best_parent, *hw = &common->hw;
unsigned int i;
if (clk_hw_get_flags(hw) & CLK_SET_RATE_NO_REPARENT) {
unsigned long adj_parent_rate;
best_parent = clk_hw_get_parent(hw);
best_parent_rate = clk_hw_get_rate(best_parent);
adj_parent_rate = ccu_mux_helper_apply_prediv(common, cm, -1,
best_parent_rate);
best_rate = round(cm, best_parent, &adj_parent_rate,
req->rate, data);
/*
* adj_parent_rate might have been modified by our clock.
* Unapply the pre-divider if there's one, and give
* the actual frequency the parent needs to run at.
*/
best_parent_rate = ccu_mux_helper_unapply_prediv(common, cm, -1,
adj_parent_rate);
goto out;
}
for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
unsigned long tmp_rate, parent_rate;
struct clk_hw *parent;
parent = clk_hw_get_parent_by_index(hw, i);
if (!parent)
continue;
parent_rate = ccu_mux_helper_apply_prediv(common, cm, i,
clk_hw_get_rate(parent));
tmp_rate = round(cm, parent, &parent_rate, req->rate, data);
/*
* parent_rate might have been modified by our clock.
* Unapply the pre-divider if there's one, and give
* the actual frequency the parent needs to run at.
*/
parent_rate = ccu_mux_helper_unapply_prediv(common, cm, i,
parent_rate);
if (tmp_rate == req->rate) {
best_parent = parent;
best_parent_rate = parent_rate;
best_rate = tmp_rate;
goto out;
}
if ((req->rate - tmp_rate) < (req->rate - best_rate)) {
best_rate = tmp_rate;
best_parent_rate = parent_rate;
best_parent = parent;
}
}
if (best_rate == 0)
return -EINVAL;
out:
req->best_parent_hw = best_parent;
req->best_parent_rate = best_parent_rate;
req->rate = best_rate;
return 0;
}
u8 ccu_mux_helper_get_parent(struct ccu_common *common,
struct ccu_mux_internal *cm)
{
u32 reg;
u8 parent;
reg = readl(common->base + common->reg);
parent = reg >> cm->shift;
parent &= (1 << cm->width) - 1;
if (cm->table) {
int num_parents = clk_hw_get_num_parents(&common->hw);
int i;
for (i = 0; i < num_parents; i++)
if (cm->table[i] == parent)
return i;
}
return parent;
}
int ccu_mux_helper_set_parent(struct ccu_common *common,
struct ccu_mux_internal *cm,
u8 index)
{
unsigned long flags;
u32 reg;
if (cm->table)
index = cm->table[index];
spin_lock_irqsave(common->lock, flags);
reg = readl(common->base + common->reg);
reg &= ~GENMASK(cm->width + cm->shift - 1, cm->shift);
writel(reg | (index << cm->shift), common->base + common->reg);
spin_unlock_irqrestore(common->lock, flags);
return 0;
}
static void ccu_mux_disable(struct clk_hw *hw)
{
struct ccu_mux *cm = hw_to_ccu_mux(hw);
return ccu_gate_helper_disable(&cm->common, cm->enable);
}
static int ccu_mux_enable(struct clk_hw *hw)
{
struct ccu_mux *cm = hw_to_ccu_mux(hw);
return ccu_gate_helper_enable(&cm->common, cm->enable);
}
static int ccu_mux_is_enabled(struct clk_hw *hw)
{
struct ccu_mux *cm = hw_to_ccu_mux(hw);
return ccu_gate_helper_is_enabled(&cm->common, cm->enable);
}
static u8 ccu_mux_get_parent(struct clk_hw *hw)
{
struct ccu_mux *cm = hw_to_ccu_mux(hw);
return ccu_mux_helper_get_parent(&cm->common, &cm->mux);
}
static int ccu_mux_set_parent(struct clk_hw *hw, u8 index)
{
struct ccu_mux *cm = hw_to_ccu_mux(hw);
return ccu_mux_helper_set_parent(&cm->common, &cm->mux, index);
}
static unsigned long ccu_mux_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct ccu_mux *cm = hw_to_ccu_mux(hw);
return ccu_mux_helper_apply_prediv(&cm->common, &cm->mux, -1,
parent_rate);
}
const struct clk_ops ccu_mux_ops = {
.disable = ccu_mux_disable,
.enable = ccu_mux_enable,
.is_enabled = ccu_mux_is_enabled,
.get_parent = ccu_mux_get_parent,
.set_parent = ccu_mux_set_parent,
.determine_rate = __clk_mux_determine_rate,
.recalc_rate = ccu_mux_recalc_rate,
};
/*
* This clock notifier is called when the frequency of the of the parent
* PLL clock is to be changed. The idea is to switch the parent to a
* stable clock, such as the main oscillator, while the PLL frequency
* stabilizes.
*/
static int ccu_mux_notifier_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct ccu_mux_nb *mux = to_ccu_mux_nb(nb);
int ret = 0;
if (event == PRE_RATE_CHANGE) {
mux->original_index = ccu_mux_helper_get_parent(mux->common,
mux->cm);
ret = ccu_mux_helper_set_parent(mux->common, mux->cm,
mux->bypass_index);
} else if (event == POST_RATE_CHANGE) {
ret = ccu_mux_helper_set_parent(mux->common, mux->cm,
mux->original_index);
}
udelay(mux->delay_us);
return notifier_from_errno(ret);
}
int ccu_mux_notifier_register(struct clk *clk, struct ccu_mux_nb *mux_nb)
{
mux_nb->clk_nb.notifier_call = ccu_mux_notifier_cb;
return clk_notifier_register(clk, &mux_nb->clk_nb);
}