diff options
| -rw-r--r-- | arch/arm/mach-exynos/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/pmu.c | 171 |
2 files changed, 130 insertions, 42 deletions
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig index 349c86708298..b9e3f1c61baf 100644 --- a/arch/arm/mach-exynos/Kconfig +++ b/arch/arm/mach-exynos/Kconfig @@ -24,6 +24,7 @@ menuconfig ARCH_EXYNOS select PM_GENERIC_DOMAINS if PM_RUNTIME select S5P_DEV_MFC select SRAM + select MFD_SYSCON help Support for SAMSUNG EXYNOS SoCs (EXYNOS4/5) diff --git a/arch/arm/mach-exynos/pmu.c b/arch/arm/mach-exynos/pmu.c index e5e1846f10c9..24cd4c471c47 100644 --- a/arch/arm/mach-exynos/pmu.c +++ b/arch/arm/mach-exynos/pmu.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2011-2012 Samsung Electronics Co., Ltd. + * Copyright (c) 2011-2014 Samsung Electronics Co., Ltd. * http://www.samsung.com/ * * EXYNOS - CPU PMU(Power Management Unit) support @@ -10,12 +10,26 @@ */ #include <linux/io.h> -#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/platform_device.h> #include "common.h" #include "regs-pmu.h" -static const struct exynos_pmu_conf *exynos_pmu_config; +struct exynos_pmu_data { + const struct exynos_pmu_conf *pmu_config; + const struct exynos_pmu_conf *pmu_config_extra; + + void (*pmu_init)(void); + void (*powerdown_conf)(enum sys_powerdown); +}; + +struct exynos_pmu_context { + struct device *dev; + const struct exynos_pmu_data *pmu_data; +}; + +static struct exynos_pmu_context *pmu_context; static const struct exynos_pmu_conf exynos4210_pmu_config[] = { /* { .offset = offset, .val = { AFTR, LPA, SLEEP } */ @@ -336,7 +350,7 @@ static unsigned int const exynos5_list_disable_wfi_wfe[] = { EXYNOS5_ISP_ARM_OPTION, }; -static void exynos5_init_pmu(void) +static void exynos5_powerdown_conf(enum sys_powerdown mode) { unsigned int i; unsigned int tmp; @@ -344,7 +358,7 @@ static void exynos5_init_pmu(void) /* * Enable both SC_FEEDBACK and SC_COUNTER */ - for (i = 0 ; i < ARRAY_SIZE(exynos5_list_both_cnt_feed) ; i++) { + for (i = 0; i < ARRAY_SIZE(exynos5_list_both_cnt_feed); i++) { tmp = pmu_raw_readl(exynos5_list_both_cnt_feed[i]); tmp |= (EXYNOS5_USE_SC_FEEDBACK | EXYNOS5_USE_SC_COUNTER); @@ -361,7 +375,7 @@ static void exynos5_init_pmu(void) /* * Disable WFI/WFE on XXX_OPTION */ - for (i = 0 ; i < ARRAY_SIZE(exynos5_list_disable_wfi_wfe) ; i++) { + for (i = 0; i < ARRAY_SIZE(exynos5_list_disable_wfi_wfe); i++) { tmp = pmu_raw_readl(exynos5_list_disable_wfi_wfe[i]); tmp &= ~(EXYNOS5_OPTION_USE_STANDBYWFE | EXYNOS5_OPTION_USE_STANDBYWFI); @@ -373,51 +387,124 @@ void exynos_sys_powerdown_conf(enum sys_powerdown mode) { unsigned int i; - if (soc_is_exynos5250()) - exynos5_init_pmu(); + const struct exynos_pmu_data *pmu_data = pmu_context->pmu_data; - for (i = 0; (exynos_pmu_config[i].offset != PMU_TABLE_END) ; i++) - pmu_raw_writel(exynos_pmu_config[i].val[mode], - exynos_pmu_config[i].offset); + if (pmu_data->powerdown_conf) + pmu_data->powerdown_conf(mode); - if (soc_is_exynos4412()) { - for (i = 0; exynos4412_pmu_config[i].offset != PMU_TABLE_END ; i++) - pmu_raw_writel(exynos4412_pmu_config[i].val[mode], - exynos4412_pmu_config[i].offset); + if (pmu_data->pmu_config) { + for (i = 0; (pmu_data->pmu_config[i].offset != PMU_TABLE_END); i++) + pmu_raw_writel(pmu_data->pmu_config[i].val[mode], + pmu_data->pmu_config[i].offset); + } + + if (pmu_data->pmu_config_extra) { + for (i = 0; pmu_data->pmu_config_extra[i].offset != PMU_TABLE_END; i++) + pmu_raw_writel(pmu_data->pmu_config_extra[i].val[mode], + pmu_data->pmu_config_extra[i].offset); } } -static int __init exynos_pmu_init(void) +static void exynos5250_pmu_init(void) { unsigned int value; + /* + * When SYS_WDTRESET is set, watchdog timer reset request + * is ignored by power management unit. + */ + value = pmu_raw_readl(EXYNOS5_AUTO_WDTRESET_DISABLE); + value &= ~EXYNOS5_SYS_WDTRESET; + pmu_raw_writel(value, EXYNOS5_AUTO_WDTRESET_DISABLE); + + value = pmu_raw_readl(EXYNOS5_MASK_WDTRESET_REQUEST); + value &= ~EXYNOS5_SYS_WDTRESET; + pmu_raw_writel(value, EXYNOS5_MASK_WDTRESET_REQUEST); +} + +static const struct exynos_pmu_data exynos4210_pmu_data = { + .pmu_config = exynos4210_pmu_config, +}; + +static const struct exynos_pmu_data exynos4212_pmu_data = { + .pmu_config = exynos4x12_pmu_config, +}; + +static const struct exynos_pmu_data exynos4412_pmu_data = { + .pmu_config = exynos4x12_pmu_config, + .pmu_config_extra = exynos4412_pmu_config, +}; + +static const struct exynos_pmu_data exynos5250_pmu_data = { + .pmu_config = exynos5250_pmu_config, + .pmu_init = exynos5250_pmu_init, + .powerdown_conf = exynos5_powerdown_conf, +}; + +/* + * PMU platform driver and devicetree bindings. + */ +static const struct of_device_id exynos_pmu_of_device_ids[] = { + { + .compatible = "samsung,exynos4210-pmu", + .data = &exynos4210_pmu_data, + }, { + .compatible = "samsung,exynos4212-pmu", + .data = &exynos4212_pmu_data, + }, { + .compatible = "samsung,exynos4412-pmu", + .data = &exynos4412_pmu_data, + }, { + .compatible = "samsung,exynos5250-pmu", + .data = &exynos5250_pmu_data, + }, + { /*sentinel*/ }, +}; - exynos_pmu_config = exynos4210_pmu_config; - - if (soc_is_exynos4210()) { - exynos_pmu_config = exynos4210_pmu_config; - pr_info("EXYNOS4210 PMU Initialize\n"); - } else if (soc_is_exynos4212() || soc_is_exynos4412()) { - exynos_pmu_config = exynos4x12_pmu_config; - pr_info("EXYNOS4x12 PMU Initialize\n"); - } else if (soc_is_exynos5250()) { - /* - * When SYS_WDTRESET is set, watchdog timer reset request - * is ignored by power management unit. - */ - value = pmu_raw_readl(EXYNOS5_AUTO_WDTRESET_DISABLE); - value &= ~EXYNOS5_SYS_WDTRESET; - pmu_raw_writel(value, EXYNOS5_AUTO_WDTRESET_DISABLE); - - value = pmu_raw_readl(EXYNOS5_MASK_WDTRESET_REQUEST); - value &= ~EXYNOS5_SYS_WDTRESET; - pmu_raw_writel(value, EXYNOS5_MASK_WDTRESET_REQUEST); - - exynos_pmu_config = exynos5250_pmu_config; - pr_info("EXYNOS5250 PMU Initialize\n"); - } else { - pr_info("EXYNOS: PMU not supported\n"); +static int exynos_pmu_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + struct device *dev = &pdev->dev; + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pmu_base_addr = devm_ioremap_resource(dev, res); + if (IS_ERR(pmu_base_addr)) + return PTR_ERR(pmu_base_addr); + + pmu_context = devm_kzalloc(&pdev->dev, + sizeof(struct exynos_pmu_context), + GFP_KERNEL); + if (!pmu_context) { + dev_err(dev, "Cannot allocate memory.\n"); + return -ENOMEM; } + pmu_context->dev = dev; + + match = of_match_node(exynos_pmu_of_device_ids, dev->of_node); + + pmu_context->pmu_data = match->data; + if (pmu_context->pmu_data->pmu_init) + pmu_context->pmu_data->pmu_init(); + + platform_set_drvdata(pdev, pmu_context); + + dev_dbg(dev, "Exynos PMU Driver probe done\n"); return 0; } -arch_initcall(exynos_pmu_init); + +static struct platform_driver exynos_pmu_driver = { + .driver = { + .name = "exynos-pmu", + .owner = THIS_MODULE, + .of_match_table = exynos_pmu_of_device_ids, + }, + .probe = exynos_pmu_probe, +}; + +static int __init exynos_pmu_init(void) +{ + return platform_driver_register(&exynos_pmu_driver); + +} +postcore_initcall(exynos_pmu_init); |