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clk: samsung: exynos4: Move suspend/resume handling to SoC driver 

Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Tomasz Figa 2014-02-14 08:16:00 +09:00 committed by Kukjin Kim
parent 3ccefbd229
commit b7b647be15
1 changed files with 80 additions and 10 deletions
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90
drivers/clk/samsung/clk-exynos4.c
View File

@ -16,6 +16,7 @@
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/syscore_ops.h>
#include "clk.h"
@ -130,6 +131,16 @@ enum exynos4_plls {
nr_plls /* number of PLLs */
};
static void __iomem *reg_base;
static enum exynos4_soc exynos4_soc;
/*
* Support for CMU save/restore across system suspends
*/
#ifdef CONFIG_PM_SLEEP
static struct samsung_clk_reg_dump *exynos4_save_common;
static struct samsung_clk_reg_dump *exynos4_save_soc;
/*
* list of controller registers to be saved and restored during a
* suspend/resume cycle.
@ -227,6 +238,70 @@ static unsigned long exynos4_clk_regs[] __initdata = {
GATE_IP_CPU,
};
static int exynos4_clk_suspend(void)
{
samsung_clk_save(reg_base, exynos4_save_common,
ARRAY_SIZE(exynos4_clk_regs));
if (exynos4_soc == EXYNOS4210)
samsung_clk_save(reg_base, exynos4_save_soc,
ARRAY_SIZE(exynos4210_clk_save));
else
samsung_clk_save(reg_base, exynos4_save_soc,
ARRAY_SIZE(exynos4x12_clk_save));
return 0;
}
static void exynos4_clk_resume(void)
{
samsung_clk_restore(reg_base, exynos4_save_common,
ARRAY_SIZE(exynos4_clk_regs));
if (exynos4_soc == EXYNOS4210)
samsung_clk_restore(reg_base, exynos4_save_soc,
ARRAY_SIZE(exynos4210_clk_save));
else
samsung_clk_restore(reg_base, exynos4_save_soc,
ARRAY_SIZE(exynos4x12_clk_save));
}
static struct syscore_ops exynos4_clk_syscore_ops = {
.suspend = exynos4_clk_suspend,
.resume = exynos4_clk_resume,
};
static void exynos4_clk_sleep_init(void)
{
exynos4_save_common = samsung_clk_alloc_reg_dump(exynos4_clk_regs,
ARRAY_SIZE(exynos4_clk_regs));
if (!exynos4_save_common)
goto err_warn;
if (exynos4_soc == EXYNOS4210)
exynos4_save_soc = samsung_clk_alloc_reg_dump(
exynos4210_clk_save,
ARRAY_SIZE(exynos4210_clk_save));
else
exynos4_save_soc = samsung_clk_alloc_reg_dump(
exynos4x12_clk_save,
ARRAY_SIZE(exynos4x12_clk_save));
if (!exynos4_save_soc)
goto err_common;
register_syscore_ops(&exynos4_clk_syscore_ops);
return;
err_common:
kfree(exynos4_save_common);
err_warn:
pr_warn("%s: failed to allocate sleep save data, no sleep support!\n",
__func__);
}
#else
static void exynos4_clk_sleep_init(void) {}
#endif
/* list of all parent clock list */
PNAME(mout_apll_p) = { "fin_pll", "fout_apll", };
PNAME(mout_mpll_p) = { "fin_pll", "fout_mpll", };
@ -1039,22 +1114,15 @@ static struct samsung_pll_clock exynos4x12_plls[nr_plls] __initdata = {
/* register exynos4 clocks */
static void __init exynos4_clk_init(struct device_node *np,
enum exynos4_soc exynos4_soc)
enum exynos4_soc soc)
{
void __iomem *reg_base;
exynos4_soc = soc;
reg_base = of_iomap(np, 0);
if (!reg_base)
panic("%s: failed to map registers\n", __func__);
if (exynos4_soc == EXYNOS4210)
samsung_clk_init(np, reg_base, CLK_NR_CLKS,
exynos4_clk_regs, ARRAY_SIZE(exynos4_clk_regs),
exynos4210_clk_save, ARRAY_SIZE(exynos4210_clk_save));
else
samsung_clk_init(np, reg_base, CLK_NR_CLKS,
exynos4_clk_regs, ARRAY_SIZE(exynos4_clk_regs),
exynos4x12_clk_save, ARRAY_SIZE(exynos4x12_clk_save));
samsung_clk_init(np, reg_base, CLK_NR_CLKS, NULL, 0, NULL, 0);
samsung_clk_of_register_fixed_ext(exynos4_fixed_rate_ext_clks,
ARRAY_SIZE(exynos4_fixed_rate_ext_clks),
@ -1127,6 +1195,8 @@ static void __init exynos4_clk_init(struct device_node *np,
samsung_clk_register_alias(exynos4_aliases,
ARRAY_SIZE(exynos4_aliases));
exynos4_clk_sleep_init();
pr_info("%s clocks: sclk_apll = %ld, sclk_mpll = %ld\n"
"\tsclk_epll = %ld, sclk_vpll = %ld, arm_clk = %ld\n",
exynos4_soc == EXYNOS4210 ? "Exynos4210" : "Exynos4x12",