Merge branch 'pm-domains' into for-linus

* pm-domains: (33 commits)
  ARM / shmobile: Return -EBUSY from A4LC power off if A3RV is active
  PM / Domains: Take .power_off() error code into account
  ARM / shmobile: Use genpd_queue_power_off_work()
  ARM / shmobile: Use pm_genpd_poweroff_unused()
  PM / Domains: Introduce function to power off all unused PM domains
  PM / Domains: Queue up power off work only if it is not pending
  PM / Domains: Improve handling of wakeup devices during system suspend
  PM / Domains: Do not restore all devices on power off error
  PM / Domains: Allow callbacks to execute all runtime PM helpers
  PM / Domains: Do not execute device callbacks under locks
  PM / Domains: Make failing pm_genpd_prepare() clean up properly
  PM / Domains: Set device state to "active" during system resume
  ARM: mach-shmobile: sh7372 A3RV requires A4LC
  PM / Domains: Export pm_genpd_poweron() in header
  ARM: mach-shmobile: sh7372 late pm domain off
  ARM: mach-shmobile: Runtime PM late init callback
  ARM: mach-shmobile: sh7372 D4 support
  ARM: mach-shmobile: sh7372 A4MP support
  ARM: mach-shmobile: sh7372: make sure that fsi is peripheral of spu2
  ARM: mach-shmobile: sh7372 A3SG support
  ...

Documentation/power/devices.txt

@@ -506,8 +506,8 @@ routines.  Nevertheless, different callback pointers are used in case there is a
 situation where it actually matters.
 
 
-Device Power Domains
---------------------
+Device Power Management Domains
+-------------------------------
 Sometimes devices share reference clocks or other power resources.  In those
 cases it generally is not possible to put devices into low-power states
 individually.  Instead, a set of devices sharing a power resource can be put
@@ -516,8 +516,8 @@ power resource.  Of course, they also need to be put into the full-power state
 together, by turning the shared power resource on.  A set of devices with this
 property is often referred to as a power domain.
 
-Support for power domains is provided through the pwr_domain field of struct
-device.  This field is a pointer to an object of type struct dev_power_domain,
+Support for power domains is provided through the pm_domain field of struct
+device.  This field is a pointer to an object of type struct dev_pm_domain,
 defined in include/linux/pm.h, providing a set of power management callbacks
 analogous to the subsystem-level and device driver callbacks that are executed
 for the given device during all power transitions, instead of the respective

Documentation/power/runtime_pm.txt

@@ -606,32 +606,60 @@ driver/base/power/generic_ops.c:
       callback provided by its driver and return its result, or return 0 if not
       defined
 
+  int pm_generic_suspend_noirq(struct device *dev);
+    - if pm_runtime_suspended(dev) returns "false", invoke the ->suspend_noirq()
+      callback provided by the device's driver and return its result, or return
+      0 if not defined
+
   int pm_generic_resume(struct device *dev);
     - invoke the ->resume() callback provided by the driver of this device and,
       if successful, change the device's runtime PM status to 'active'
 
+  int pm_generic_resume_noirq(struct device *dev);
+    - invoke the ->resume_noirq() callback provided by the driver of this device
+
   int pm_generic_freeze(struct device *dev);
     - if the device has not been suspended at run time, invoke the ->freeze()
       callback provided by its driver and return its result, or return 0 if not
       defined
 
+  int pm_generic_freeze_noirq(struct device *dev);
+    - if pm_runtime_suspended(dev) returns "false", invoke the ->freeze_noirq()
+      callback provided by the device's driver and return its result, or return
+      0 if not defined
+
   int pm_generic_thaw(struct device *dev);
     - if the device has not been suspended at run time, invoke the ->thaw()
       callback provided by its driver and return its result, or return 0 if not
       defined
 
+  int pm_generic_thaw_noirq(struct device *dev);
+    - if pm_runtime_suspended(dev) returns "false", invoke the ->thaw_noirq()
+      callback provided by the device's driver and return its result, or return
+      0 if not defined
+
   int pm_generic_poweroff(struct device *dev);
     - if the device has not been suspended at run time, invoke the ->poweroff()
       callback provided by its driver and return its result, or return 0 if not
       defined
 
+  int pm_generic_poweroff_noirq(struct device *dev);
+    - if pm_runtime_suspended(dev) returns "false", run the ->poweroff_noirq()
+      callback provided by the device's driver and return its result, or return
+      0 if not defined
+
   int pm_generic_restore(struct device *dev);
     - invoke the ->restore() callback provided by the driver of this device and,
       if successful, change the device's runtime PM status to 'active'
 
+  int pm_generic_restore_noirq(struct device *dev);
+    - invoke the ->restore_noirq() callback provided by the device's driver
+
 These functions can be assigned to the ->runtime_idle(), ->runtime_suspend(),
-->runtime_resume(), ->suspend(), ->resume(), ->freeze(), ->thaw(), ->poweroff(),
-or ->restore() callback pointers in the subsystem-level dev_pm_ops structures.
+->runtime_resume(), ->suspend(), ->suspend_noirq(), ->resume(),
+->resume_noirq(), ->freeze(), ->freeze_noirq(), ->thaw(), ->thaw_noirq(),
+->poweroff(), ->poweroff_noirq(), ->restore(), ->restore_noirq() callback
+pointers in the subsystem-level dev_pm_ops structures.
 
 If a subsystem wishes to use all of them at the same time, it can simply assign
 the GENERIC_SUBSYS_PM_OPS macro, defined in include/linux/pm.h, to its

arch/arm/Kconfig

@@ -642,6 +642,7 @@ config ARCH_SHMOBILE
 	select NO_IOPORT
 	select SPARSE_IRQ
 	select MULTI_IRQ_HANDLER
+	select PM_GENERIC_DOMAINS if PM
 	help
 	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
 

arch/arm/mach-omap1/pm_bus.c

@@ -32,7 +32,7 @@ static int omap1_pm_runtime_suspend(struct device *dev)
 	if (ret)
 		return ret;
 
-	ret = pm_runtime_clk_suspend(dev);
+	ret = pm_clk_suspend(dev);
 	if (ret) {
 		pm_generic_runtime_resume(dev);
 		return ret;
@@ -45,24 +45,24 @@ static int omap1_pm_runtime_resume(struct device *dev)
 {
 	dev_dbg(dev, "%s\n", __func__);
 
-	pm_runtime_clk_resume(dev);
+	pm_clk_resume(dev);
 	return pm_generic_runtime_resume(dev);
 }
 
-static struct dev_power_domain default_power_domain = {
+static struct dev_pm_domain default_pm_domain = {
 	.ops = {
 		.runtime_suspend = omap1_pm_runtime_suspend,
 		.runtime_resume = omap1_pm_runtime_resume,
 		USE_PLATFORM_PM_SLEEP_OPS
 	},
 };
-#define OMAP1_PWR_DOMAIN (&default_power_domain)
+#define OMAP1_PM_DOMAIN (&default_pm_domain)
 #else
-#define OMAP1_PWR_DOMAIN NULL
+#define OMAP1_PM_DOMAIN NULL
 #endif /* CONFIG_PM_RUNTIME */
 
 static struct pm_clk_notifier_block platform_bus_notifier = {
-	.pwr_domain = OMAP1_PWR_DOMAIN,
+	.pm_domain = OMAP1_PM_DOMAIN,
 	.con_ids = { "ick", "fck", NULL, },
 };
 
@@ -71,7 +71,7 @@ static int __init omap1_pm_runtime_init(void)
 	if (!cpu_class_is_omap1())
 		return -ENODEV;
 
-	pm_runtime_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
+	pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
 
 	return 0;
 }

arch/arm/mach-shmobile/board-ap4evb.c

@@ -1408,9 +1408,14 @@ static void __init ap4evb_init(void)
 
 	platform_add_devices(ap4evb_devices, ARRAY_SIZE(ap4evb_devices));
 
+	sh7372_add_device_to_domain(&sh7372_a4lc, &lcdc1_device);
+	sh7372_add_device_to_domain(&sh7372_a4lc, &lcdc_device);
+	sh7372_add_device_to_domain(&sh7372_a4mp, &fsi_device);
+
 	hdmi_init_pm_clock();
 	fsi_init_pm_clock();
 	sh7372_pm_init();
+	pm_clk_add(&fsi_device.dev, "spu2");
 }
 
 static void __init ap4evb_timer_init(void)

arch/arm/mach-shmobile/board-mackerel.c

@@ -1582,8 +1582,13 @@ static void __init mackerel_init(void)
 
 	platform_add_devices(mackerel_devices, ARRAY_SIZE(mackerel_devices));
 
+	sh7372_add_device_to_domain(&sh7372_a4lc, &lcdc_device);
+	sh7372_add_device_to_domain(&sh7372_a4lc, &hdmi_lcdc_device);
+	sh7372_add_device_to_domain(&sh7372_a4mp, &fsi_device);
+
 	hdmi_init_pm_clock();
 	sh7372_pm_init();
+	pm_clk_add(&fsi_device.dev, "spu2");
 }
 
 static void __init mackerel_timer_init(void)

arch/arm/mach-shmobile/clock-sh7372.c

@@ -662,6 +662,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_ICK_ID("ick", "sh-mobile-hdmi", &div6_reparent_clks[DIV6_HDMI]),
 	CLKDEV_ICK_ID("icka", "sh_fsi2", &div6_reparent_clks[DIV6_FSIA]),
 	CLKDEV_ICK_ID("ickb", "sh_fsi2", &div6_reparent_clks[DIV6_FSIB]),
+	CLKDEV_ICK_ID("spu2", "sh_fsi2", &mstp_clks[MSTP223]),
 };
 
 void __init sh7372_clock_init(void)

arch/arm/mach-shmobile/include/mach/sh7372.h

@@ -12,6 +12,7 @@
 #define __ASM_SH7372_H__
 
 #include <linux/sh_clk.h>
+#include <linux/pm_domain.h>
 
 /*
  * Pin Function Controller:
@@ -470,4 +471,32 @@ extern struct clk sh7372_fsibck_clk;
 extern struct clk sh7372_fsidiva_clk;
 extern struct clk sh7372_fsidivb_clk;
 
+struct platform_device;
+
+struct sh7372_pm_domain {
+	struct generic_pm_domain genpd;
+	unsigned int bit_shift;
+};
+
+static inline struct sh7372_pm_domain *to_sh7372_pd(struct generic_pm_domain *d)
+{
+	return container_of(d, struct sh7372_pm_domain, genpd);
+}
+
+#ifdef CONFIG_PM
+extern struct sh7372_pm_domain sh7372_a4lc;
+extern struct sh7372_pm_domain sh7372_a4mp;
+extern struct sh7372_pm_domain sh7372_d4;
+extern struct sh7372_pm_domain sh7372_a3rv;
+extern struct sh7372_pm_domain sh7372_a3ri;
+extern struct sh7372_pm_domain sh7372_a3sg;
+
+extern void sh7372_init_pm_domain(struct sh7372_pm_domain *sh7372_pd);
+extern void sh7372_add_device_to_domain(struct sh7372_pm_domain *sh7372_pd,
+					struct platform_device *pdev);
+#else
+#define sh7372_init_pm_domain(pd) do { } while(0)
+#define sh7372_add_device_to_domain(pd, pdev) do { } while(0)
+#endif /* CONFIG_PM */
+
 #endif /* __ASM_SH7372_H__ */

arch/arm/mach-shmobile/pm-sh7372.c

@@ -15,16 +15,176 @@
 #include <linux/list.h>
 #include <linux/err.h>
 #include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/tlbflush.h>
 #include <mach/common.h>
+#include <mach/sh7372.h>
 
 #define SMFRAM 0xe6a70000
 #define SYSTBCR 0xe6150024
 #define SBAR 0xe6180020
 #define APARMBAREA 0xe6f10020
 
+#define SPDCR 0xe6180008
+#define SWUCR 0xe6180014
+#define PSTR 0xe6180080
+
+#define PSTR_RETRIES 100
+#define PSTR_DELAY_US 10
+
+#ifdef CONFIG_PM
+
+static int pd_power_down(struct generic_pm_domain *genpd)
+{
+	struct sh7372_pm_domain *sh7372_pd = to_sh7372_pd(genpd);
+	unsigned int mask = 1 << sh7372_pd->bit_shift;
+
+	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();
+		}
+	}
+
+	pr_debug("sh7372 power domain down 0x%08x -> PSTR = 0x%08x\n",
+		 mask, __raw_readl(PSTR));
+
+	return 0;
+}
+
+static int pd_power_up(struct generic_pm_domain *genpd)
+{
+	struct sh7372_pm_domain *sh7372_pd = to_sh7372_pd(genpd);
+	unsigned int mask = 1 << sh7372_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))
+			goto out;
+		if (retry_count > PSTR_RETRIES)
+			udelay(PSTR_DELAY_US);
+		else
+			cpu_relax();
+	}
+	if (__raw_readl(SWUCR) & mask)
+		ret = -EIO;
+
+ out:
+	pr_debug("sh7372 power domain up 0x%08x -> PSTR = 0x%08x\n",
+		 mask, __raw_readl(PSTR));
+
+	return ret;
+}
+
+static int pd_power_up_a3rv(struct generic_pm_domain *genpd)
+{
+	int ret = pd_power_up(genpd);
+
+	/* force A4LC on after A3RV has been requested on */
+	pm_genpd_poweron(&sh7372_a4lc.genpd);
+
+	return ret;
+}
+
+static int pd_power_down_a3rv(struct generic_pm_domain *genpd)
+{
+	int ret = pd_power_down(genpd);
+
+	/* try to power down A4LC after A3RV is requested off */
+	genpd_queue_power_off_work(&sh7372_a4lc.genpd);
+
+	return ret;
+}
+
+static int pd_power_down_a4lc(struct generic_pm_domain *genpd)
+{
+	/* only power down A4LC if A3RV is off */
+	if (!(__raw_readl(PSTR) & (1 << sh7372_a3rv.bit_shift)))
+		return pd_power_down(genpd);
+
+	return -EBUSY;
+}
+
+static bool pd_active_wakeup(struct device *dev)
+{
+	return true;
+}
+
+void sh7372_init_pm_domain(struct sh7372_pm_domain *sh7372_pd)
+{
+	struct generic_pm_domain *genpd = &sh7372_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;
+
+	if (sh7372_pd == &sh7372_a4lc) {
+		genpd->power_off = pd_power_down_a4lc;
+		genpd->power_on = pd_power_up;
+	} else if (sh7372_pd == &sh7372_a3rv) {
+		genpd->power_off = pd_power_down_a3rv;
+		genpd->power_on = pd_power_up_a3rv;
+	} else {
+		genpd->power_off = pd_power_down;
+		genpd->power_on = pd_power_up;
+	}
+	genpd->power_on(&sh7372_pd->genpd);
+}
+
+void sh7372_add_device_to_domain(struct sh7372_pm_domain *sh7372_pd,
+				 struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+
+	if (!dev->power.subsys_data) {
+		pm_clk_init(dev);
+		pm_clk_add(dev, NULL);
+	}
+	pm_genpd_add_device(&sh7372_pd->genpd, dev);
+}
+
+struct sh7372_pm_domain sh7372_a4lc = {
+	.bit_shift = 1,
+};
+
+struct sh7372_pm_domain sh7372_a4mp = {
+	.bit_shift = 2,
+};
+
+struct sh7372_pm_domain sh7372_d4 = {
+	.bit_shift = 3,
+};
+
+struct sh7372_pm_domain sh7372_a3rv = {
+	.bit_shift = 6,
+};
+
+struct sh7372_pm_domain sh7372_a3ri = {
+	.bit_shift = 8,
+};
+
+struct sh7372_pm_domain sh7372_a3sg = {
+	.bit_shift = 13,
+};
+
+#endif /* CONFIG_PM */
+
 static void sh7372_enter_core_standby(void)
 {
 	void __iomem *smfram = (void __iomem *)SMFRAM;