Pankaj Dubey wrote: > > This patch modifies Exynos Power Management Unit (PMU) initialization > implementation in following way: > > - Added platform driver support and probe function where Exynos PMU > driver will register itself as syscon provider with syscon framework. > - Added platform struct exynos_pmu_data to hold platform specific data. > - For each SoC's PMU support now we can add platform data and statically > bind PMU configuration and SoC specific initialization function. > - Separate each SoC's PMU initialization function and make it as part of > platform data. > - It also removes uses of soc_is_exynosXYZ(). > > Signed-off-by: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx> > Reviewed-by: Tomasz Figa <t.figa@xxxxxxxxxxx> > --- > arch/arm/mach-exynos/Kconfig | 1 + > arch/arm/mach-exynos/pmu.c | 185 +++++++++++++++++++++++++++++++++--------- > 2 files changed, 146 insertions(+), 40 deletions(-) > Looks good to me, will apply this and 4/4. Thanks, Kukjin > diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig > index 8f9b66c..a2944ac 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 ff9d23f..5b76728 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 +10,28 @@ > */ > > #include <linux/io.h> > -#include <linux/kernel.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > +#include <linux/mfd/syscon.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 } */ > @@ -335,7 +351,7 @@ static unsigned int const exynos5_list_diable_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; > @@ -372,51 +388,140 @@ 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, > +}; > + > +static const struct regmap_config pmu_regmap_config = { > + .reg_bits = 32, > + .val_bits = 32, > + .reg_stride = 4, > +}; > > - 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"); > +/* > + * 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*/ }, > +}; > + > +static int exynos_pmu_probe(struct platform_device *pdev) > +{ > + const struct of_device_id *match; > + struct device *dev = &pdev->dev; > + struct regmap *regmap; > + 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; > + > + regmap = devm_regmap_init_mmio(dev, pmu_base_addr, > + &pmu_regmap_config); > + if (IS_ERR(regmap)) { > + dev_err(dev, "regmap init failed\n"); > + return PTR_ERR(regmap); > } > > + devm_syscon_register(dev, regmap); > + > + match = of_match_node(exynos_pmu_of_device_ids, pdev->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); > -- > 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
 |