Kukjin Kim wrote: > Chanwoo Choi wrote: >> Use the generic power domains support to implement support for >> power domain on EXYNOS4210. >> >> I refer to the following patch to implement what configure >> the clock-gating control register for block to turn off/on: >> http://git.infradead.org/users/kmpark/linux-2.6- >> samsung/commit/39a81876d034dcbdc2a4c4c4b847b3b49e38870c >> > I think, this should be moved under "---" OK, I will move it. > >> This patch is based on following "pm-domains" branch. >> http://git.kernel.org/?p=linux/kernel/git/rafael/suspend- >> 2.6.git;a=shortlog;h=refs/heads/pm-domains >> > Same as above. OK. > >> Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> >> Signed-off-by: Myungjoo Ham <myungjoo.ham@xxxxxxxxxxx> >> Signed-off-by: Kyungmin.park <kyungmin.park@xxxxxxxxxxx> > > Kyungmin Park? My mistake. I will modify it. > >> --- >> arch/arm/mach-exynos4/Kconfig | 1 + >> arch/arm/mach-exynos4/Makefile | 1 + >> arch/arm/mach-exynos4/include/mach/pm-exynos4210.h | 53 ++++++ >> arch/arm/mach-exynos4/include/mach/regs-clock.h | 8 + >> arch/arm/mach-exynos4/mach-nuri.c | 18 ++ >> arch/arm/mach-exynos4/pm-exynos4210.c | 184 >> ++++++++++++++++++++ >> 6 files changed, 265 insertions(+), 0 deletions(-) >> create mode 100644 arch/arm/mach-exynos4/include/mach/pm-exynos4210.h >> create mode 100644 arch/arm/mach-exynos4/pm-exynos4210.c >> >> diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig >> index 1435fc3..c5357b5 100644 >> --- a/arch/arm/mach-exynos4/Kconfig >> +++ b/arch/arm/mach-exynos4/Kconfig >> @@ -183,6 +183,7 @@ config MACH_NURI >> select EXYNOS4_SETUP_SDHCI >> select EXYNOS4_SETUP_USB_PHY >> select SAMSUNG_DEV_PWM >> + select PM_GENERIC_DOMAINS if PM > > Do you _really_ think this should be under MACH_NURI? > This patch apply the generic power-domain to NURI board. If other board(EXYNOS4 series) use the generic power-domain, I think that PM_GENERIC_DOMAINS config should be moved under CPU_EXYNOS4210 config. If you prefer to move it under CPU_EXYNOS4210, I will modify it. >> help >> Machine support for Samsung Mobile NURI Board. >> >> diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile >> index 60fe5ec..0e9461f 100644 >> --- a/arch/arm/mach-exynos4/Makefile >> +++ b/arch/arm/mach-exynos4/Makefile >> @@ -17,6 +17,7 @@ obj-$(CONFIG_CPU_EXYNOS4210) += setup-i2c0.o irq- >> eint.o dma.o >> obj-$(CONFIG_PM) += pm.o sleep.o >> obj-$(CONFIG_CPU_FREQ) += cpufreq.o >> obj-$(CONFIG_CPU_IDLE) += cpuidle.o >> +obj-$(CONFIG_CPU_EXYNOS4210) += pm-exynos4210.o >> >> obj-$(CONFIG_SMP) += platsmp.o headsmp.o >> >> diff --git a/arch/arm/mach-exynos4/include/mach/pm-exynos4210.h >> b/arch/arm/mach-exynos4/include/mach/pm-exynos4210.h >> new file mode 100644 >> index 0000000..ab09034 >> --- /dev/null >> +++ b/arch/arm/mach-exynos4/include/mach/pm-exynos4210.h >> @@ -0,0 +1,53 @@ >> +/* linux/arch/arm/mach-exynos4/include/mach/pm-exynos4.h > > According to your file name, should be linux/arch/arm/mach-exynos4/include/mach/pm-exynos4210.h ? This patch support only power-domain of EXYNOS4210, so I named "pm-exynos4210.h" If EXYNOS4 series board will be released, I will modify include file name from "pm-exynos4210.h" to "pm-exynos4.h" to support all EXYNOS4 series. But, I don't know next EXYNOS4 series and then named "pm-exynos4210.h". Do you want to change from "pm-exynos4210.h" to "pm-exynos4.h"? > >> + * >> + * Exynos4 Power management support > > Is this for EXYNOS4 or only EXYNOS4210? > Only EXYNOS4210. I will fix it. >> + * >> + * Copyright (c) 2011 Samsung Electronics Co., Ltd. >> + * http://www.samsung.com >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + */ >> + >> +#ifndef PM_EXYNOS4210_H >> +#define PM_EXYNOS4210_H >> + >> +#include <linux/pm_domain.h> >> +#include <plat/pd.h> >> + >> +struct platform_device; >> + >> +struct exynos4210_pm_domain { >> + struct generic_pm_domain genpd; >> + >> + const char *name; >> + void __iomem *base; >> + u32 mask; >> + int boot_on; >> +}; >> + >> +static inline struct exynos4210_pm_domain *to_exynos4210_pd( >> + struct generic_pm_domain *pd) >> +{ >> + return container_of(pd, struct exynos4210_pm_domain, genpd); >> +} >> + >> +#ifdef CONFIG_PM >> +extern struct exynos4210_pm_domain exynos4210_pd_mfc; >> +extern struct exynos4210_pm_domain exynos4210_pd_g3d; >> +extern struct exynos4210_pm_domain exynos4210_pd_lcd0; >> +extern struct exynos4210_pm_domain exynos4210_pd_lcd1; >> +extern struct exynos4210_pm_domain exynos4210_pd_tv; >> +extern struct exynos4210_pm_domain exynos4210_pd_cam; >> +extern struct exynos4210_pm_domain exynos4210_pd_gps; >> + >> +extern void exynos4210_init_pm_domain(struct exynos4210_pm_domain >> *exynos4210_pd); >> +extern void exynos4210_add_device_to_domain(struct exynos4210_pm_domain >> *exynos4210_pd, >> + struct platform_device *pdev); >> +#else >> +#define exynos4210_init_pm_domain(pd) do { } while(0) >> +#define exynos4_add_device_to_domain(pd, pdev) do { } while(0) >> +#endif /* CONFIG_PM */ >> + >> +#endif /* PM_EXYNOS4210_H */ >> diff --git a/arch/arm/mach-exynos4/include/mach/regs-clock.h b/arch/arm/mach- >> exynos4/include/mach/regs-clock.h >> index 6e311c1..bc0fda9 100644 >> --- a/arch/arm/mach-exynos4/include/mach/regs-clock.h >> +++ b/arch/arm/mach-exynos4/include/mach/regs-clock.h >> @@ -171,6 +171,14 @@ >> #define S5P_CLKDIV_BUS_GPLR_SHIFT (4) >> #define S5P_CLKDIV_BUS_GPLR_MASK (0x7 << >> S5P_CLKDIV_BUS_GPLR_SHIFT) >> >> +#define S5P_CLKGATE_BLOCK_CAM (1<<0) > > The blank should be added around "<<" like (1 << 0) Ok, I will modify it. > >> +#define S5P_CLKGATE_BLOCK_TV (1<<1) >> +#define S5P_CLKGATE_BLOCK_MFC (1<<2) >> +#define S5P_CLKGATE_BLOCK_G3D (1<<3) >> +#define S5P_CLKGATE_BLOCK_LCD0 (1<<4) >> +#define S5P_CLKGATE_BLOCK_LCD1 (1<<5) >> +#define S5P_CLKGATE_BLOCK_GPS (1<<7) > > Same... Ok. > >> + >> /* Compatibility defines and inclusion */ >> >> #include <mach/regs-pmu.h> > > Hmm...how about if this is required, just add the inclusion in c file? > > Actually, you added above in pm-exynos4210.c... It was added before this patch, so I didn't consider it. If you want to remove it, I apply this patch about removal of inclusion(mach/regs-pmu.h). > >> diff --git a/arch/arm/mach-exynos4/mach-nuri.c b/arch/arm/mach-exynos4/mach- >> nuri.c >> index 642702b..816c6f4 100644 >> --- a/arch/arm/mach-exynos4/mach-nuri.c >> +++ b/arch/arm/mach-exynos4/mach-nuri.c >> @@ -37,6 +37,7 @@ >> #include <plat/iic.h> >> >> #include <mach/map.h> >> +#include <mach/pm-exynos4210.h> >> >> /* Following are default values for UCON, ULCON and UFCON UART registers */ >> #define NURI_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ >> @@ -376,6 +377,21 @@ static struct platform_device *nuri_devices[] __initdata = { >> &nuri_backlight_device, >> }; >> >> +static void __init nuri_power_domain_init(void) >> +{ >> + /* Initialize power-domain */ >> + exynos4210_init_pm_domain(&exynos4210_pd_mfc); >> + exynos4210_init_pm_domain(&exynos4210_pd_g3d); >> + exynos4210_init_pm_domain(&exynos4210_pd_lcd0); >> + exynos4210_init_pm_domain(&exynos4210_pd_lcd1); >> + exynos4210_init_pm_domain(&exynos4210_pd_tv); >> + exynos4210_init_pm_domain(&exynos4210_pd_cam); >> + exynos4210_init_pm_domain(&exynos4210_pd_gps); > > Hmm, is this needed only on NURI? As mentioned above, this patch support only NURI board. If the generic power-domain to support EXYNOS4210 is used on other board, I think that it should apply the board file of other board using EXYNOS4210. > >> + >> + /* Add device to power-domain */ >> + exynos4210_add_device_to_domain(&exynos4210_pd_lcd0, >> &nuri_lcd_device); >> +} >> + >> static void __init nuri_map_io(void) >> { >> s5p_init_io(NULL, 0, S5P_VA_CHIPID); >> @@ -398,6 +414,8 @@ static void __init nuri_machine_init(void) >> >> /* Last */ >> platform_add_devices(nuri_devices, ARRAY_SIZE(nuri_devices)); >> + >> + nuri_power_domain_init(); >> } >> >> MACHINE_START(NURI, "NURI") >> diff --git a/arch/arm/mach-exynos4/pm-exynos4210.c b/arch/arm/mach- >> exynos4/pm-exynos4210.c >> new file mode 100644 >> index 0000000..f44dcef >> --- /dev/null >> +++ b/arch/arm/mach-exynos4/pm-exynos4210.c >> @@ -0,0 +1,184 @@ >> +/* linux/arch/arm/mach-exynos4/pm-exynos4210.c >> + * >> + * Exynos4210 Power management support >> + * >> + * Copyright (c) 2011 Samsung Electronics Co., Ltd. >> + * http://www.samsung.com >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + */ >> + >> +#include <linux/pm.h> >> +#include <linux/module.h> >> +#include <linux/delay.h> >> +#include <linux/err.h> >> +#include <linux/slab.h> >> +#include <linux/pm_runtime.h> >> +#include <linux/platform_device.h> >> +#include <linux/pm_domain.h> >> +#include <linux/io.h> >> + >> +#include <mach/regs-pmu.h> > > As I said, so no need to add this inclusion in <mach/regs-clock.h> Ok. > >> +#include <mach/regs-clock.h> >> +#include <mach/pm-exynos4210.h> >> + >> +#ifdef CONFIG_PM >> +static DEFINE_SPINLOCK(clkgate_block_lock); >> + >> +static int pd_power_down(struct generic_pm_domain *genpd) >> +{ >> + struct exynos4210_pm_domain *exynos4210_pd = >> to_exynos4210_pd(genpd); >> + u32 timeout; >> + >> + /* Disable the power of power-domain */ >> + __raw_writel(0, exynos4210_pd->base); >> + >> + /* Wait max 1ms */ >> + timeout = 10; >> + while (__raw_readl(exynos4210_pd->base + 0x4) & >> S5P_INT_LOCAL_PWR_EN) { >> + if (timeout == 0) { >> + printk(KERN_ERR "Power domain %s disable failed.\n", >> + exynos4210_pd->name); >> + return -ETIMEDOUT; >> + } >> + timeout--; >> + udelay(100); >> + } >> + >> + /* Configure the clock-gating control register for block to turn off */ >> + if (exynos4210_pd->mask) { >> + unsigned long flags; >> + u32 reg; >> + >> + spin_lock_irqsave(&clkgate_block_lock, flags); >> + reg = __raw_readl(S5P_CLKGATE_BLOCK); >> + reg &= ~exynos4210_pd->mask; >> + __raw_writel(reg, S5P_CLKGATE_BLOCK); >> + spin_unlock_irqrestore(&clkgate_block_lock, flags); >> + } >> + >> + return 0; >> +} >> + >> +static int pd_power_up(struct generic_pm_domain *genpd) >> +{ >> + struct exynos4210_pm_domain *exynos4210_pd = >> to_exynos4210_pd(genpd); >> + u32 timeout; >> + >> + /* Enable power domain */ >> + __raw_writel(S5P_INT_LOCAL_PWR_EN, exynos4210_pd->base); >> + >> + /* Wait max 1ms */ >> + timeout = 10; >> + while ((__raw_readl(exynos4210_pd->base + 0x4) & >> S5P_INT_LOCAL_PWR_EN) >> + != S5P_INT_LOCAL_PWR_EN) { >> + if (timeout == 0) { >> + printk(KERN_ERR "Power domain %s enable failed.\n", >> + exynos4210_pd->name); >> + return -ETIMEDOUT; >> + } >> + timeout--; >> + udelay(100); >> + } >> + >> + /* Configure the clock-gating control register for block to turn on */ >> + if (exynos4210_pd->mask) { >> + unsigned long flags; >> + u32 reg; >> + >> + spin_lock_irqsave(&clkgate_block_lock, flags); >> + reg = __raw_readl(S5P_CLKGATE_BLOCK); >> + reg |= exynos4210_pd->mask; >> + __raw_writel(reg, S5P_CLKGATE_BLOCK); >> + spin_unlock_irqrestore(&clkgate_block_lock, flags); >> + } >> + >> + return 0; >> +} > > Would be better if you could add some common function for pd_power_up and _down... What do you mean about common function? The generic Power-domain framework provides callback function to control power-domain, so I implement the control function to support power-domain of EXYNOS4210. We need the additional common function for EXYNOS4210 ??? You can see the below codes: + genpd->stop_device = pm_clk_suspend; + genpd->start_device = pm_clk_resume; + genpd->active_wakeup = pd_active_wakeup; + genpd->power_off = pd_power_down; + genpd->power_on = pd_power_up; > > I wonder why we need to add this for handling power domain not update current pd. As you said, the generic power-domain framework isn't updated to Mainline, But, this patch prepares to support the subsequent power-domain framework, To review this patch, I posted it. > As you know, they are having same/similar purpose and functions... > I don't understand your comment exactly. Don't your agree to use the generic Power-domain framework for SAMSUNG SoC? or Again, please decribe your comment in detail. >> + >> +static bool pd_active_wakeup(struct device *dev) >> +{ >> + return true; >> +} >> + >> +void exynos4210_init_pm_domain(struct exynos4210_pm_domain >> *exynos4210_pd) >> +{ >> + struct generic_pm_domain *genpd; >> + >> + if (!exynos4210_pd) >> + return; >> + >> + genpd = &exynos4210_pd->genpd; >> + >> + pm_genpd_init(genpd, NULL, false); >> + genpd->stop_device = pm_clk_suspend; >> + genpd->start_device = pm_clk_resume; >> + genpd->active_wakeup = pd_active_wakeup; >> + genpd->power_off = pd_power_down; >> + genpd->power_on = pd_power_up; >> + >> + if (exynos4210_pd->boot_on) >> + pd_power_up(&exynos4210_pd->genpd); >> +} >> + >> +void exynos4210_add_device_to_domain(struct exynos4210_pm_domain >> *exynos4210_pd, >> + struct platform_device *pdev) >> +{ >> + struct device *dev = &pdev->dev; >> + >> + if (exynos4210_pd && pdev) >> + pm_genpd_add_device(&exynos4210_pd->genpd, dev); >> +} >> + >> +struct exynos4210_pm_domain exynos4210_pd_mfc = { >> + .name = "PD_MFC", >> + .base = S5P_PMU_MFC_CONF, >> + .mask = S5P_CLKGATE_BLOCK_MFC, >> + .boot_on = 0, >> +}; >> + >> +struct exynos4210_pm_domain exynos4210_pd_g3d = { >> + .name = "PD_G3D", >> + .base = S5P_PMU_G3D_CONF, >> + .mask = S5P_CLKGATE_BLOCK_G3D, >> + .boot_on = 0, >> +}; >> + >> +struct exynos4210_pm_domain exynos4210_pd_lcd0 = { >> + .name = "PD_LCD0", >> + .base = S5P_PMU_LCD0_CONF, >> + .mask = S5P_CLKGATE_BLOCK_LCD0, >> + .boot_on = 1, >> +}; >> + >> +struct exynos4210_pm_domain exynos4210_pd_lcd1 = { >> + .name = "PD_LCD1", >> + .base = S5P_PMU_LCD1_CONF, >> + .mask = S5P_CLKGATE_BLOCK_LCD1, >> + .boot_on = 0, >> +}; >> + >> +struct exynos4210_pm_domain exynos4210_pd_tv = { >> + .name = "PD_TV", >> + .base = S5P_PMU_TV_CONF, >> + .mask = S5P_CLKGATE_BLOCK_TV, >> + .boot_on = 0, >> +}; >> + >> +struct exynos4210_pm_domain exynos4210_pd_cam = { >> + .name = "PD_CAM", >> + .base = S5P_PMU_CAM_CONF, >> + .mask = S5P_CLKGATE_BLOCK_CAM, >> + .boot_on = 0, >> +}; >> + >> +struct exynos4210_pm_domain exynos4210_pd_gps = { >> + .name = "PD_GPS", >> + .base = S5P_PMU_GPS_CONF, >> + .mask = S5P_CLKGATE_BLOCK_GPS, >> + .boot_on = 0, >> +}; >> + >> +#endif /* CONFIG_PM */ >> -- >> 1.7.0.4 > > > Thanks. > > Best regards, > Kgene. > -- > Kukjin Kim <kgene.kim@xxxxxxxxxxx>, Senior Engineer, > SW Solution Development Team, Samsung Electronics Co., Ltd. > > Thanks, Best regards, Chanwoo Choi -- 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
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