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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
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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 */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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; | ||
| } | ||
|
|
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| 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 */ |