From 066da1ae52c30ae7e2792dbbb0d6bcbba493245e Mon Sep 17 00:00:00 2001 From: Vikas Sajjan Date: Wed, 24 Sep 2014 16:45:14 +0900 Subject: [PATCH] ARM: EXYNOS: Refactor the pm code to use DT based lookup Refactoring the pm.c to avoid using "soc_is_exynos" checks, instead use the DT based lookup. While at it, consolidate the common code across SoCs and create static helper functions. Signed-off-by: Vikas Sajjan Reviewed-by: Tomasz Figa Signed-off-by: Kukjin Kim --- arch/arm/mach-exynos/pm.c | 167 ++++++++++++++++++++++++-------- arch/arm/mach-exynos/regs-pmu.h | 1 + 2 files changed, 126 insertions(+), 42 deletions(-) diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c index 31e209b38f41..16b23d156eec 100644 --- a/arch/arm/mach-exynos/pm.c +++ b/arch/arm/mach-exynos/pm.c @@ -36,6 +36,8 @@ #include "regs-pmu.h" #include "regs-sys.h" +#define REG_TABLE_END (-1U) + /** * struct exynos_wkup_irq - Exynos GIC to PMU IRQ mapping * @hwirq: Hardware IRQ signal of the GIC @@ -59,6 +61,21 @@ static struct sleep_save exynos_core_save[] = { SAVE_ITEM(S5P_SROM_BC3), }; +struct exynos_pm_data { + const struct exynos_wkup_irq *wkup_irq; + struct sleep_save *extra_save; + int num_extra_save; + unsigned int wake_disable_mask; + unsigned int *release_ret_regs; + + void (*pm_prepare)(void); + void (*pm_resume)(void); + int (*pm_suspend)(void); + int (*cpu_suspend)(unsigned long); +}; + +struct exynos_pm_data *pm_data; + /* * GIC wake-up support */ @@ -77,14 +94,24 @@ static const struct exynos_wkup_irq exynos5250_wkup_irq[] = { { /* sentinel */ }, }; +unsigned int exynos_release_ret_regs[] = { + S5P_PAD_RET_MAUDIO_OPTION, + S5P_PAD_RET_GPIO_OPTION, + S5P_PAD_RET_UART_OPTION, + S5P_PAD_RET_MMCA_OPTION, + S5P_PAD_RET_MMCB_OPTION, + S5P_PAD_RET_EBIA_OPTION, + S5P_PAD_RET_EBIB_OPTION, + REG_TABLE_END, +}; + static int exynos_irq_set_wake(struct irq_data *data, unsigned int state) { const struct exynos_wkup_irq *wkup_irq; - if (soc_is_exynos5250()) - wkup_irq = exynos5250_wkup_irq; - else - wkup_irq = exynos4_wkup_irq; + if (!pm_data->wkup_irq) + return -ENOENT; + wkup_irq = pm_data->wkup_irq; while (wkup_irq->mask) { if (wkup_irq->hwirq == data->hwirq) { @@ -229,15 +256,8 @@ void exynos_enter_aftr(void) cpu_pm_exit(); } -static int exynos_cpu_suspend(unsigned long arg) +static int exynos_cpu_do_idle(void) { -#ifdef CONFIG_CACHE_L2X0 - outer_flush_all(); -#endif - - if (soc_is_exynos5250()) - flush_cache_all(); - /* issue the standby signal into the pm unit. */ cpu_do_idle(); @@ -245,29 +265,44 @@ static int exynos_cpu_suspend(unsigned long arg) return 1; /* Aborting suspend */ } -static void exynos_pm_prepare(void) +static int exynos_cpu_suspend(unsigned long arg) { - unsigned int tmp; + flush_cache_all(); + outer_flush_all(); + return exynos_cpu_do_idle(); +} +static void exynos_pm_set_wakeup_mask(void) +{ /* Set wake-up mask registers */ pmu_raw_writel(exynos_get_eint_wake_mask(), S5P_EINT_WAKEUP_MASK); pmu_raw_writel(exynos_irqwake_intmask & ~(1 << 31), S5P_WAKEUP_MASK); +} - s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save)); - - if (soc_is_exynos5250()) - s3c_pm_do_save(exynos5_sys_save, ARRAY_SIZE(exynos5_sys_save)); - +static void exynos_pm_enter_sleep_mode(void) +{ /* Set value of power down register for sleep mode */ - exynos_sys_powerdown_conf(SYS_SLEEP); pmu_raw_writel(S5P_CHECK_SLEEP, S5P_INFORM1); /* ensure at least INFORM0 has the resume address */ - pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0); } +static void exynos_pm_prepare(void) +{ + /* Set wake-up mask registers */ + exynos_pm_set_wakeup_mask(); + + s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save)); + + if (pm_data->extra_save) + s3c_pm_do_save(pm_data->extra_save, + pm_data->num_extra_save); + + exynos_pm_enter_sleep_mode(); +} + static int exynos_pm_suspend(void) { unsigned long tmp; @@ -285,6 +320,15 @@ static int exynos_pm_suspend(void) return 0; } +static void exynos_pm_release_retention(void) +{ + unsigned int i; + + for (i = 0; (pm_data->release_ret_regs[i] != REG_TABLE_END); i++) + pmu_raw_writel(EXYNOS_WAKEUP_FROM_LOWPWR, + pm_data->release_ret_regs[i]); +} + static void exynos_pm_resume(void) { if (exynos_pm_central_resume()) @@ -294,18 +338,11 @@ static void exynos_pm_resume(void) exynos_cpu_restore_register(); /* For release retention */ + exynos_pm_release_retention(); - pmu_raw_writel((1 << 28), S5P_PAD_RET_MAUDIO_OPTION); - pmu_raw_writel((1 << 28), S5P_PAD_RET_GPIO_OPTION); - pmu_raw_writel((1 << 28), S5P_PAD_RET_UART_OPTION); - pmu_raw_writel((1 << 28), S5P_PAD_RET_MMCA_OPTION); - pmu_raw_writel((1 << 28), S5P_PAD_RET_MMCB_OPTION); - pmu_raw_writel((1 << 28), S5P_PAD_RET_EBIA_OPTION); - pmu_raw_writel((1 << 28), S5P_PAD_RET_EBIB_OPTION); - - if (soc_is_exynos5250()) - s3c_pm_do_restore(exynos5_sys_save, - ARRAY_SIZE(exynos5_sys_save)); + if (pm_data->extra_save) + s3c_pm_do_restore_core(pm_data->extra_save, + pm_data->num_extra_save); s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save)); @@ -316,15 +353,8 @@ early_wakeup: /* Clear SLEEP mode set in INFORM1 */ pmu_raw_writel(0x0, S5P_INFORM1); - - return; } -static struct syscore_ops exynos_pm_syscore_ops = { - .suspend = exynos_pm_suspend, - .resume = exynos_pm_resume, -}; - /* * Suspend Ops */ @@ -348,11 +378,12 @@ static int exynos_suspend_enter(suspend_state_t state) } s3c_pm_save_uarts(); - exynos_pm_prepare(); + if (pm_data->pm_prepare) + pm_data->pm_prepare(); flush_cache_all(); s3c_pm_check_store(); - ret = cpu_suspend(0, exynos_cpu_suspend); + ret = cpu_suspend(0, pm_data->cpu_suspend); if (ret) return ret; @@ -387,18 +418,70 @@ static const struct platform_suspend_ops exynos_suspend_ops = { .valid = suspend_valid_only_mem, }; +static const struct exynos_pm_data exynos4_pm_data = { + .wkup_irq = exynos4_wkup_irq, + .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), + .release_ret_regs = exynos_release_ret_regs, + .pm_suspend = exynos_pm_suspend, + .pm_resume = exynos_pm_resume, + .pm_prepare = exynos_pm_prepare, + .cpu_suspend = exynos_cpu_suspend, +}; + +static const struct exynos_pm_data exynos5250_pm_data = { + .wkup_irq = exynos5250_wkup_irq, + .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), + .release_ret_regs = exynos_release_ret_regs, + .extra_save = exynos5_sys_save, + .num_extra_save = ARRAY_SIZE(exynos5_sys_save), + .pm_suspend = exynos_pm_suspend, + .pm_resume = exynos_pm_resume, + .pm_prepare = exynos_pm_prepare, + .cpu_suspend = exynos_cpu_suspend, +}; + +static struct of_device_id exynos_pmu_of_device_ids[] = { + { + .compatible = "samsung,exynos4210-pmu", + .data = &exynos4_pm_data, + }, { + .compatible = "samsung,exynos4212-pmu", + .data = &exynos4_pm_data, + }, { + .compatible = "samsung,exynos4412-pmu", + .data = &exynos4_pm_data, + }, { + .compatible = "samsung,exynos5250-pmu", + .data = &exynos5250_pm_data, + }, + { /*sentinel*/ }, +}; + +static struct syscore_ops exynos_pm_syscore_ops; + void __init exynos_pm_init(void) { + const struct of_device_id *match; u32 tmp; + of_find_matching_node_and_match(NULL, exynos_pmu_of_device_ids, &match); + if (!match) { + pr_err("Failed to find PMU node\n"); + return; + } + pm_data = (struct exynos_pm_data *) match->data; + /* Platform-specific GIC callback */ gic_arch_extn.irq_set_wake = exynos_irq_set_wake; /* All wakeup disable */ tmp = pmu_raw_readl(S5P_WAKEUP_MASK); - tmp |= ((0xFF << 8) | (0x1F << 1)); + tmp |= pm_data->wake_disable_mask; pmu_raw_writel(tmp, S5P_WAKEUP_MASK); + exynos_pm_syscore_ops.suspend = pm_data->pm_suspend; + exynos_pm_syscore_ops.resume = pm_data->pm_resume; + register_syscore_ops(&exynos_pm_syscore_ops); suspend_set_ops(&exynos_suspend_ops); } diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h index 96a1569262b5..30c03017aa6a 100644 --- a/arch/arm/mach-exynos/regs-pmu.h +++ b/arch/arm/mach-exynos/regs-pmu.h @@ -21,6 +21,7 @@ #define S5P_USE_STANDBY_WFI0 (1 << 16) #define S5P_USE_STANDBY_WFE0 (1 << 24) +#define EXYNOS_WAKEUP_FROM_LOWPWR (1 << 28) #define EXYNOS_SWRESET 0x0400 #define EXYNOS5440_SWRESET 0x00C4 -- 2.39.5