diff options
author | Rafael J. Wysocki <rjw@sisk.pl> | 2012-07-06 22:43:44 +0400 |
---|---|---|
committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-07-06 22:43:44 +0400 |
commit | de5c094a902d58eb9372aa648c6a7c22cff129fd (patch) | |
tree | ea50dd7767127aa7a906fa3393e163f43c5d505d /arch/arm/mach-shmobile | |
parent | 3abd69d28b7ec7607bd6f559fe618bb7db815e1c (diff) | |
parent | 8f45b112fc66ef6869ccca4c3966976982f496a9 (diff) | |
download | linux-de5c094a902d58eb9372aa648c6a7c22cff129fd.tar.xz |
Merge branch 'renesas-soc-core' into renesas-sh7372
* renesas-soc-core:
ARM: shmobile: soc-core: add R-mobile PM domain common APIs
ARM: mach-shmobile: Convert sh_clk_mstp32_register to sh_clk_mstp_register
Diffstat (limited to 'arch/arm/mach-shmobile')
-rw-r--r-- | arch/arm/mach-shmobile/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/clock-r8a7740.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/clock-r8a7779.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/clock-sh7367.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/clock-sh7372.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/clock-sh7377.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/clock-sh73a0.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/include/mach/pm-rmobile.h | 44 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/pm-rmobile.c | 167 |
9 files changed, 218 insertions, 6 deletions
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile index 8aa1962c22a2..3ffe4126922f 100644 --- a/arch/arm/mach-shmobile/Makefile +++ b/arch/arm/mach-shmobile/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_ARCH_R8A7740) += entry-intc.o # PM objects obj-$(CONFIG_SUSPEND) += suspend.o obj-$(CONFIG_CPU_IDLE) += cpuidle.o +obj-$(CONFIG_ARCH_SHMOBILE) += pm-rmobile.o obj-$(CONFIG_ARCH_SH7372) += pm-sh7372.o sleep-sh7372.o obj-$(CONFIG_ARCH_R8A7779) += pm-r8a7779.o diff --git a/arch/arm/mach-shmobile/clock-r8a7740.c b/arch/arm/mach-shmobile/clock-r8a7740.c index 26eea5f21054..29c397a9f20b 100644 --- a/arch/arm/mach-shmobile/clock-r8a7740.c +++ b/arch/arm/mach-shmobile/clock-r8a7740.c @@ -495,7 +495,7 @@ void __init r8a7740_clock_init(u8 md_ck) ret = sh_clk_div6_register(div6_clks, DIV6_NR); if (!ret) - ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); + ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); clkdev_add_table(lookups, ARRAY_SIZE(lookups)); diff --git a/arch/arm/mach-shmobile/clock-r8a7779.c b/arch/arm/mach-shmobile/clock-r8a7779.c index 7d6e9fe47b56..339c62c824d5 100644 --- a/arch/arm/mach-shmobile/clock-r8a7779.c +++ b/arch/arm/mach-shmobile/clock-r8a7779.c @@ -162,7 +162,7 @@ void __init r8a7779_clock_init(void) ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); if (!ret) - ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); + ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); for (k = 0; !ret && (k < ARRAY_SIZE(late_main_clks)); k++) ret = clk_register(late_main_clks[k]); diff --git a/arch/arm/mach-shmobile/clock-sh7367.c b/arch/arm/mach-shmobile/clock-sh7367.c index 006e7b5d304c..162b791b8984 100644 --- a/arch/arm/mach-shmobile/clock-sh7367.c +++ b/arch/arm/mach-shmobile/clock-sh7367.c @@ -344,7 +344,7 @@ void __init sh7367_clock_init(void) ret = sh_clk_div6_register(div6_clks, DIV6_NR); if (!ret) - ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); + ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); clkdev_add_table(lookups, ARRAY_SIZE(lookups)); diff --git a/arch/arm/mach-shmobile/clock-sh7372.c b/arch/arm/mach-shmobile/clock-sh7372.c index 94d1f88246d3..5a2894b1c965 100644 --- a/arch/arm/mach-shmobile/clock-sh7372.c +++ b/arch/arm/mach-shmobile/clock-sh7372.c @@ -704,7 +704,7 @@ void __init sh7372_clock_init(void) ret = sh_clk_div6_reparent_register(div6_reparent_clks, DIV6_REPARENT_NR); if (!ret) - ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); + ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); for (k = 0; !ret && (k < ARRAY_SIZE(late_main_clks)); k++) ret = clk_register(late_main_clks[k]); diff --git a/arch/arm/mach-shmobile/clock-sh7377.c b/arch/arm/mach-shmobile/clock-sh7377.c index 0798a15936c3..85f2a3ec2c44 100644 --- a/arch/arm/mach-shmobile/clock-sh7377.c +++ b/arch/arm/mach-shmobile/clock-sh7377.c @@ -355,7 +355,7 @@ void __init sh7377_clock_init(void) ret = sh_clk_div6_register(div6_clks, DIV6_NR); if (!ret) - ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); + ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); clkdev_add_table(lookups, ARRAY_SIZE(lookups)); diff --git a/arch/arm/mach-shmobile/clock-sh73a0.c b/arch/arm/mach-shmobile/clock-sh73a0.c index 472d1f5361e5..f6788bed8e00 100644 --- a/arch/arm/mach-shmobile/clock-sh73a0.c +++ b/arch/arm/mach-shmobile/clock-sh73a0.c @@ -612,7 +612,7 @@ void __init sh73a0_clock_init(void) ret = sh_clk_div6_reparent_register(div6_clks, DIV6_NR); if (!ret) - ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); + ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); for (k = 0; !ret && (k < ARRAY_SIZE(late_main_clks)); k++) ret = clk_register(late_main_clks[k]); diff --git a/arch/arm/mach-shmobile/include/mach/pm-rmobile.h b/arch/arm/mach-shmobile/include/mach/pm-rmobile.h new file mode 100644 index 000000000000..5a402840fe28 --- /dev/null +++ b/arch/arm/mach-shmobile/include/mach/pm-rmobile.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2012 Renesas Solutions Corp. + * + * Kuninori Morimoto <morimoto.kuninori@renesas.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#ifndef PM_RMOBILE_H +#define PM_RMOBILE_H + +#include <linux/pm_domain.h> + +struct platform_device; + +struct rmobile_pm_domain { + struct generic_pm_domain genpd; + struct dev_power_governor *gov; + int (*suspend)(void); + void (*resume)(void); + unsigned int bit_shift; + bool no_debug; +}; + +static inline +struct rmobile_pm_domain *to_rmobile_pd(struct generic_pm_domain *d) +{ + return container_of(d, struct rmobile_pm_domain, genpd); +} + +#ifdef CONFIG_PM +extern void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd); +extern void rmobile_add_device_to_domain(struct rmobile_pm_domain *rmobile_pd, + struct platform_device *pdev); +extern void rmobile_pm_add_subdomain(struct rmobile_pm_domain *rmobile_pd, + struct rmobile_pm_domain *rmobile_sd); +#else +#define rmobile_init_pm_domain(pd) do { } while (0) +#define rmobile_add_device_to_domain(pd, pdev) do { } while (0) +#define rmobile_pm_add_subdomain(pd, sd) do { } while (0) +#endif /* CONFIG_PM */ + +#endif /* PM_RMOBILE_H */ diff --git a/arch/arm/mach-shmobile/pm-rmobile.c b/arch/arm/mach-shmobile/pm-rmobile.c new file mode 100644 index 000000000000..a8562540f1d6 --- /dev/null +++ b/arch/arm/mach-shmobile/pm-rmobile.c @@ -0,0 +1,167 @@ +/* + * rmobile power management support + * + * Copyright (C) 2012 Renesas Solutions Corp. + * Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> + * + * based on pm-sh7372.c + * Copyright (C) 2011 Magnus Damm + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/console.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/pm_clock.h> +#include <asm/io.h> +#include <mach/pm-rmobile.h> + +/* SYSC */ +#define SPDCR 0xe6180008 +#define SWUCR 0xe6180014 +#define PSTR 0xe6180080 + +#define PSTR_RETRIES 100 +#define PSTR_DELAY_US 10 + +#ifdef CONFIG_PM +static int rmobile_pd_power_down(struct generic_pm_domain *genpd) +{ + struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd); + unsigned int mask = 1 << rmobile_pd->bit_shift; + + if (rmobile_pd->suspend) { + int ret = rmobile_pd->suspend(); + + if (ret) + return ret; + } + + if (__raw_readl(PSTR) & mask) { + unsigned int retry_count; + __raw_writel(mask, SPDCR); + + for (retry_count = PSTR_RETRIES; retry_count; retry_count--) { + if (!(__raw_readl(SPDCR) & mask)) + break; + cpu_relax(); + } + } + + if (!rmobile_pd->no_debug) + pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n", + genpd->name, mask, __raw_readl(PSTR)); + + return 0; +} + +static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd, + bool do_resume) +{ + unsigned int mask = 1 << rmobile_pd->bit_shift; + unsigned int retry_count; + int ret = 0; + + if (__raw_readl(PSTR) & mask) + goto out; + + __raw_writel(mask, SWUCR); + + for (retry_count = 2 * PSTR_RETRIES; retry_count; retry_count--) { + if (!(__raw_readl(SWUCR) & mask)) + break; + if (retry_count > PSTR_RETRIES) + udelay(PSTR_DELAY_US); + else + cpu_relax(); + } + if (!retry_count) + ret = -EIO; + + if (!rmobile_pd->no_debug) + pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n", + rmobile_pd->genpd.name, mask, __raw_readl(PSTR)); + +out: + if (ret == 0 && rmobile_pd->resume && do_resume) + rmobile_pd->resume(); + + return ret; +} + +static int rmobile_pd_power_up(struct generic_pm_domain *genpd) +{ + return __rmobile_pd_power_up(to_rmobile_pd(genpd), true); +} + +static bool rmobile_pd_active_wakeup(struct device *dev) +{ + bool (*active_wakeup)(struct device *dev); + + active_wakeup = dev_gpd_data(dev)->ops.active_wakeup; + return active_wakeup ? active_wakeup(dev) : true; +} + +static int rmobile_pd_stop_dev(struct device *dev) +{ + int (*stop)(struct device *dev); + + stop = dev_gpd_data(dev)->ops.stop; + if (stop) { + int ret = stop(dev); + if (ret) + return ret; + } + return pm_clk_suspend(dev); +} + +static int rmobile_pd_start_dev(struct device *dev) +{ + int (*start)(struct device *dev); + int ret; + + ret = pm_clk_resume(dev); + if (ret) + return ret; + + start = dev_gpd_data(dev)->ops.start; + if (start) + ret = start(dev); + + return ret; +} + +void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd) +{ + struct generic_pm_domain *genpd = &rmobile_pd->genpd; + struct dev_power_governor *gov = rmobile_pd->gov; + + pm_genpd_init(genpd, gov ? : &simple_qos_governor, false); + genpd->dev_ops.stop = rmobile_pd_stop_dev; + genpd->dev_ops.start = rmobile_pd_start_dev; + genpd->dev_ops.active_wakeup = rmobile_pd_active_wakeup; + genpd->dev_irq_safe = true; + genpd->power_off = rmobile_pd_power_down; + genpd->power_on = rmobile_pd_power_up; + __rmobile_pd_power_up(rmobile_pd, false); +} + +void rmobile_add_device_to_domain(struct rmobile_pm_domain *rmobile_pd, + struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + pm_genpd_add_device(&rmobile_pd->genpd, dev); + if (pm_clk_no_clocks(dev)) + pm_clk_add(dev, NULL); +} + +void rmobile_pm_add_subdomain(struct rmobile_pm_domain *rmobile_pd, + struct rmobile_pm_domain *rmobile_sd) +{ + pm_genpd_add_subdomain(&rmobile_pd->genpd, &rmobile_sd->genpd); +} +#endif /* CONFIG_PM */ |