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-rw-r--r--drivers/clk/samsung/clk-exynos4.c145
1 files changed, 14 insertions, 131 deletions
diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index 0421960eb963..d7cfdb0732c8 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -16,7 +16,6 @@
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
-#include <linux/syscore_ops.h>
#include "clk.h"
#include "clk-cpu.h"
@@ -158,14 +157,6 @@ 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;
-static struct samsung_clk_reg_dump *exynos4_save_pll;
-
-/*
* list of controller registers to be saved and restored during a
* suspend/resume cycle.
*/
@@ -192,7 +183,7 @@ static const unsigned long exynos4x12_clk_save[] __initconst = {
E4X12_PWR_CTRL2,
};
-static const unsigned long exynos4_clk_pll_regs[] __initconst = {
+static const unsigned long exynos4_clk_regs[] __initconst = {
EPLL_LOCK,
VPLL_LOCK,
EPLL_CON0,
@@ -201,9 +192,6 @@ static const unsigned long exynos4_clk_pll_regs[] __initconst = {
VPLL_CON0,
VPLL_CON1,
VPLL_CON2,
-};
-
-static const unsigned long exynos4_clk_regs[] __initconst = {
SRC_LEFTBUS,
DIV_LEFTBUS,
GATE_IP_LEFTBUS,
@@ -276,6 +264,8 @@ static const unsigned long exynos4_clk_regs[] __initconst = {
};
static const struct samsung_clk_reg_dump src_mask_suspend[] = {
+ { .offset = VPLL_CON0, .value = 0x80600302, },
+ { .offset = EPLL_CON0, .value = 0x806F0302, },
{ .offset = SRC_MASK_TOP, .value = 0x00000001, },
{ .offset = SRC_MASK_CAM, .value = 0x11111111, },
{ .offset = SRC_MASK_TV, .value = 0x00000111, },
@@ -291,123 +281,6 @@ static const struct samsung_clk_reg_dump src_mask_suspend_e4210[] = {
{ .offset = E4210_SRC_MASK_LCD1, .value = 0x00001111, },
};
-#define PLL_ENABLED (1 << 31)
-#define PLL_LOCKED (1 << 29)
-
-static void exynos4_clk_enable_pll(u32 reg)
-{
- u32 pll_con = readl(reg_base + reg);
- pll_con |= PLL_ENABLED;
- writel(pll_con, reg_base + reg);
-
- while (!(pll_con & PLL_LOCKED)) {
- cpu_relax();
- pll_con = readl(reg_base + reg);
- }
-}
-
-static void exynos4_clk_wait_for_pll(u32 reg)
-{
- u32 pll_con;
-
- pll_con = readl(reg_base + reg);
- if (!(pll_con & PLL_ENABLED))
- return;
-
- while (!(pll_con & PLL_LOCKED)) {
- cpu_relax();
- pll_con = readl(reg_base + reg);
- }
-}
-
-static int exynos4_clk_suspend(void)
-{
- samsung_clk_save(reg_base, exynos4_save_common,
- ARRAY_SIZE(exynos4_clk_regs));
- samsung_clk_save(reg_base, exynos4_save_pll,
- ARRAY_SIZE(exynos4_clk_pll_regs));
-
- exynos4_clk_enable_pll(EPLL_CON0);
- exynos4_clk_enable_pll(VPLL_CON0);
-
- if (exynos4_soc == EXYNOS4210) {
- samsung_clk_save(reg_base, exynos4_save_soc,
- ARRAY_SIZE(exynos4210_clk_save));
- samsung_clk_restore(reg_base, src_mask_suspend_e4210,
- ARRAY_SIZE(src_mask_suspend_e4210));
- } else {
- samsung_clk_save(reg_base, exynos4_save_soc,
- ARRAY_SIZE(exynos4x12_clk_save));
- }
-
- samsung_clk_restore(reg_base, src_mask_suspend,
- ARRAY_SIZE(src_mask_suspend));
-
- return 0;
-}
-
-static void exynos4_clk_resume(void)
-{
- samsung_clk_restore(reg_base, exynos4_save_pll,
- ARRAY_SIZE(exynos4_clk_pll_regs));
-
- exynos4_clk_wait_for_pll(EPLL_CON0);
- exynos4_clk_wait_for_pll(VPLL_CON0);
-
- 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 __init 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;
-
- exynos4_save_pll = samsung_clk_alloc_reg_dump(exynos4_clk_pll_regs,
- ARRAY_SIZE(exynos4_clk_pll_regs));
- if (!exynos4_save_pll)
- goto err_soc;
-
- register_syscore_ops(&exynos4_clk_syscore_ops);
- return;
-
-err_soc:
- kfree(exynos4_save_soc);
-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 __init 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", };
@@ -1532,7 +1405,17 @@ static void __init exynos4_clk_init(struct device_node *np,
if (soc == EXYNOS4X12)
exynos4x12_core_down_clock();
- exynos4_clk_sleep_init();
+
+ samsung_clk_extended_sleep_init(reg_base,
+ exynos4_clk_regs, ARRAY_SIZE(exynos4_clk_regs),
+ src_mask_suspend, ARRAY_SIZE(src_mask_suspend));
+ if (exynos4_soc == EXYNOS4210)
+ samsung_clk_extended_sleep_init(reg_base,
+ exynos4210_clk_save, ARRAY_SIZE(exynos4210_clk_save),
+ src_mask_suspend_e4210, ARRAY_SIZE(src_mask_suspend_e4210));
+ else
+ samsung_clk_sleep_init(reg_base, exynos4x12_clk_save,
+ ARRAY_SIZE(exynos4x12_clk_save));
samsung_clk_of_add_provider(np, ctx);
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