diff options
Diffstat (limited to 'drivers/clk/samsung')
| -rw-r--r-- | drivers/clk/samsung/clk-exynos4.c | 145 |
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); |