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ARM: shmobile: soc-core: add R-mobile PM domain common APIs
This patch adds Renesas R-mobile series common PM domain APIs. R-mobile CPU can use/switch this API Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Kuninori Morimoto
Rafael J. Wysocki
parent
64e9de2f85
commit
8f45b112fc
@ -39,6 +39,7 @@ obj-$(CONFIG_ARCH_R8A7740) += entry-intc.o
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# PM objects
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obj-$(CONFIG_SUSPEND) += suspend.o
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obj-$(CONFIG_CPU_IDLE) += cpuidle.o
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obj-$(CONFIG_ARCH_SHMOBILE) += pm-rmobile.o
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obj-$(CONFIG_ARCH_SH7372) += pm-sh7372.o sleep-sh7372.o
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obj-$(CONFIG_ARCH_R8A7779) += pm-r8a7779.o
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44
arch/arm/mach-shmobile/include/mach/pm-rmobile.h
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44
arch/arm/mach-shmobile/include/mach/pm-rmobile.h
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@ -0,0 +1,44 @@
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/*
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* Copyright (C) 2012 Renesas Solutions Corp.
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*
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* Kuninori Morimoto <morimoto.kuninori@renesas.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef PM_RMOBILE_H
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#define PM_RMOBILE_H
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#include <linux/pm_domain.h>
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struct platform_device;
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struct rmobile_pm_domain {
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struct generic_pm_domain genpd;
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struct dev_power_governor *gov;
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int (*suspend)(void);
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void (*resume)(void);
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unsigned int bit_shift;
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bool no_debug;
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};
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static inline
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struct rmobile_pm_domain *to_rmobile_pd(struct generic_pm_domain *d)
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{
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return container_of(d, struct rmobile_pm_domain, genpd);
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}
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#ifdef CONFIG_PM
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extern void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd);
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extern void rmobile_add_device_to_domain(struct rmobile_pm_domain *rmobile_pd,
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struct platform_device *pdev);
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extern void rmobile_pm_add_subdomain(struct rmobile_pm_domain *rmobile_pd,
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struct rmobile_pm_domain *rmobile_sd);
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#else
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#define rmobile_init_pm_domain(pd) do { } while (0)
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#define rmobile_add_device_to_domain(pd, pdev) do { } while (0)
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#define rmobile_pm_add_subdomain(pd, sd) do { } while (0)
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#endif /* CONFIG_PM */
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#endif /* PM_RMOBILE_H */
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167
arch/arm/mach-shmobile/pm-rmobile.c
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167
arch/arm/mach-shmobile/pm-rmobile.c
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@ -0,0 +1,167 @@
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/*
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* rmobile power management support
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*
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* Copyright (C) 2012 Renesas Solutions Corp.
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* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* based on pm-sh7372.c
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* Copyright (C) 2011 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/pm_clock.h>
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#include <asm/io.h>
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#include <mach/pm-rmobile.h>
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/* SYSC */
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#define SPDCR 0xe6180008
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#define SWUCR 0xe6180014
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#define PSTR 0xe6180080
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#define PSTR_RETRIES 100
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#define PSTR_DELAY_US 10
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#ifdef CONFIG_PM
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static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
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{
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struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd);
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unsigned int mask = 1 << rmobile_pd->bit_shift;
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if (rmobile_pd->suspend) {
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int ret = rmobile_pd->suspend();
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if (ret)
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return ret;
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}
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if (__raw_readl(PSTR) & mask) {
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unsigned int retry_count;
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__raw_writel(mask, SPDCR);
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for (retry_count = PSTR_RETRIES; retry_count; retry_count--) {
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if (!(__raw_readl(SPDCR) & mask))
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break;
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cpu_relax();
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}
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}
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if (!rmobile_pd->no_debug)
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pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n",
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genpd->name, mask, __raw_readl(PSTR));
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return 0;
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}
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static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd,
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bool do_resume)
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{
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unsigned int mask = 1 << rmobile_pd->bit_shift;
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unsigned int retry_count;
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int ret = 0;
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if (__raw_readl(PSTR) & mask)
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goto out;
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__raw_writel(mask, SWUCR);
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for (retry_count = 2 * PSTR_RETRIES; retry_count; retry_count--) {
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if (!(__raw_readl(SWUCR) & mask))
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break;
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if (retry_count > PSTR_RETRIES)
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udelay(PSTR_DELAY_US);
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else
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cpu_relax();
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}
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if (!retry_count)
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ret = -EIO;
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if (!rmobile_pd->no_debug)
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pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
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rmobile_pd->genpd.name, mask, __raw_readl(PSTR));
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out:
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if (ret == 0 && rmobile_pd->resume && do_resume)
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rmobile_pd->resume();
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return ret;
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}
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static int rmobile_pd_power_up(struct generic_pm_domain *genpd)
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{
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return __rmobile_pd_power_up(to_rmobile_pd(genpd), true);
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}
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static bool rmobile_pd_active_wakeup(struct device *dev)
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{
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bool (*active_wakeup)(struct device *dev);
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active_wakeup = dev_gpd_data(dev)->ops.active_wakeup;
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return active_wakeup ? active_wakeup(dev) : true;
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}
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static int rmobile_pd_stop_dev(struct device *dev)
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{
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int (*stop)(struct device *dev);
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stop = dev_gpd_data(dev)->ops.stop;
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if (stop) {
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int ret = stop(dev);
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if (ret)
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return ret;
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}
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return pm_clk_suspend(dev);
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}
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static int rmobile_pd_start_dev(struct device *dev)
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{
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int (*start)(struct device *dev);
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int ret;
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ret = pm_clk_resume(dev);
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if (ret)
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return ret;
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start = dev_gpd_data(dev)->ops.start;
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if (start)
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ret = start(dev);
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return ret;
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}
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void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
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{
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struct generic_pm_domain *genpd = &rmobile_pd->genpd;
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struct dev_power_governor *gov = rmobile_pd->gov;
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pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
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genpd->dev_ops.stop = rmobile_pd_stop_dev;
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genpd->dev_ops.start = rmobile_pd_start_dev;
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genpd->dev_ops.active_wakeup = rmobile_pd_active_wakeup;
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genpd->dev_irq_safe = true;
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genpd->power_off = rmobile_pd_power_down;
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genpd->power_on = rmobile_pd_power_up;
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__rmobile_pd_power_up(rmobile_pd, false);
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}
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void rmobile_add_device_to_domain(struct rmobile_pm_domain *rmobile_pd,
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struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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pm_genpd_add_device(&rmobile_pd->genpd, dev);
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if (pm_clk_no_clocks(dev))
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pm_clk_add(dev, NULL);
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}
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void rmobile_pm_add_subdomain(struct rmobile_pm_domain *rmobile_pd,
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struct rmobile_pm_domain *rmobile_sd)
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{
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pm_genpd_add_subdomain(&rmobile_pd->genpd, &rmobile_sd->genpd);
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}
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#endif /* CONFIG_PM */
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