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Commit 62dc7c02 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'pm-domains' 

* pm-domains:
  PM / shmobile: Make MTU2 driver use pm_genpd_dev_always_on()
  PM / shmobile: Make CMT driver use pm_genpd_dev_always_on()
  PM / shmobile: Make TMU driver use pm_genpd_dev_always_on()
  PM / Domains: Introduce "always on" device flag
  PM / Domains: Fix hibernation restore of devices, v2
  PM / Domains: Fix handling of wakeup devices during system resume
parents cf3bbcaf 57d13370

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

+2 −0
Original line number Diff line number Diff line
@@ -1043,6 +1043,8 @@ void __init sh7372_add_standard_devices(void) 
	sh7372_add_device_to_domain(&sh7372_a4r, &veu2_device);

	sh7372_add_device_to_domain(&sh7372_a4r, &veu3_device);

	sh7372_add_device_to_domain(&sh7372_a4r, &jpu_device);

	sh7372_add_device_to_domain(&sh7372_a4r, &tmu00_device);

	sh7372_add_device_to_domain(&sh7372_a4r, &tmu01_device);

}



void __init sh7372_add_early_devices(void)

drivers/base/power/domain.c

+53 −16
Original line number Diff line number Diff line
@@ -366,7 +366,7 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd) 
	not_suspended = 0;

	list_for_each_entry(pdd, &genpd->dev_list, list_node)

		if (pdd->dev->driver && (!pm_runtime_suspended(pdd->dev)

		    || pdd->dev->power.irq_safe))

		    || pdd->dev->power.irq_safe || to_gpd_data(pdd)->always_on))

			not_suspended++;



	if (not_suspended > genpd->in_progress)
@@ -503,6 +503,9 @@ static int pm_genpd_runtime_suspend(struct device *dev) 


	might_sleep_if(!genpd->dev_irq_safe);



	if (dev_gpd_data(dev)->always_on)

		return -EBUSY;



	stop_ok = genpd->gov ? genpd->gov->stop_ok : NULL;

	if (stop_ok && !stop_ok(dev))

		return -EBUSY;
@@ -764,8 +767,10 @@ static int pm_genpd_prepare(struct device *dev) 


	genpd_acquire_lock(genpd);



	if (genpd->prepared_count++ == 0)

	if (genpd->prepared_count++ == 0) {

		genpd->suspended_count = 0;

		genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF;

	}



	genpd_release_lock(genpd);
@@ -857,7 +862,7 @@ static int pm_genpd_suspend_noirq(struct device *dev) 
	if (IS_ERR(genpd))

		return -EINVAL;



	if (genpd->suspend_power_off

	if (genpd->suspend_power_off || dev_gpd_data(dev)->always_on

	    || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)))

		return 0;
@@ -890,7 +895,8 @@ static int pm_genpd_resume_noirq(struct device *dev) 
	if (IS_ERR(genpd))

		return -EINVAL;



	if (genpd->suspend_power_off)

	if (genpd->suspend_power_off || dev_gpd_data(dev)->always_on

	    || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)))

		return 0;



	/*
@@ -1009,7 +1015,8 @@ static int pm_genpd_freeze_noirq(struct device *dev) 
	if (IS_ERR(genpd))

		return -EINVAL;



	return genpd->suspend_power_off ? 0 : genpd_stop_dev(genpd, dev);

	return genpd->suspend_power_off || dev_gpd_data(dev)->always_on ?

		0 : genpd_stop_dev(genpd, dev);

}



/**
@@ -1029,7 +1036,8 @@ static int pm_genpd_thaw_noirq(struct device *dev) 
	if (IS_ERR(genpd))

		return -EINVAL;



	return genpd->suspend_power_off ? 0 : genpd_start_dev(genpd, dev);

	return genpd->suspend_power_off || dev_gpd_data(dev)->always_on ?

		0 : genpd_start_dev(genpd, dev);

}



/**
@@ -1096,22 +1104,32 @@ static int pm_genpd_restore_noirq(struct device *dev) 
	 * Since all of the "noirq" callbacks are executed sequentially, it is

	 * guaranteed that this function will never run twice in parallel for

	 * the same PM domain, so it is not necessary to use locking here.

	 *

	 * At this point suspended_count == 0 means we are being run for the

	 * first time for the given domain in the present cycle.

	 */

	if (genpd->suspended_count++ == 0) {

		/*

		 * The boot kernel might put the domain into arbitrary state,

		 * so make it appear as powered off to pm_genpd_poweron(), so

		 * that it tries to power it on in case it was really off.

		 */

		genpd->status = GPD_STATE_POWER_OFF;

		if (genpd->suspend_power_off) {

			/*

		 * The boot kernel might put the domain into the power on state,

		 * so make sure it really is powered off.

			 * If the domain was off before the hibernation, make

			 * sure it will be off going forward.

			 */

			if (genpd->power_off)

				genpd->power_off(genpd);



			return 0;

		}

	}



	pm_genpd_poweron(genpd);

	genpd->suspended_count--;



	return genpd_start_dev(genpd, dev);

	return dev_gpd_data(dev)->always_on ? 0 : genpd_start_dev(genpd, dev);

}



/**
@@ -1306,6 +1324,26 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, 
	return ret;

}



/**

 * pm_genpd_dev_always_on - Set/unset the "always on" flag for a given device.

 * @dev: Device to set/unset the flag for.

 * @val: The new value of the device's "always on" flag.

 */

void pm_genpd_dev_always_on(struct device *dev, bool val)

{

	struct pm_subsys_data *psd;

	unsigned long flags;



	spin_lock_irqsave(&dev->power.lock, flags);



	psd = dev_to_psd(dev);

	if (psd && psd->domain_data)

		to_gpd_data(psd->domain_data)->always_on = val;



	spin_unlock_irqrestore(&dev->power.lock, flags);

}

EXPORT_SYMBOL_GPL(pm_genpd_dev_always_on);



/**

 * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain.

 * @genpd: Master PM domain to add the subdomain to.
@@ -1648,7 +1686,6 @@ void pm_genpd_init(struct generic_pm_domain *genpd, 
	genpd->poweroff_task = NULL;

	genpd->resume_count = 0;

	genpd->device_count = 0;

	genpd->suspended_count = 0;

	genpd->max_off_time_ns = -1;

	genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend;

	genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume;

drivers/clocksource/sh_cmt.c

+4 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include <linux/sh_timer.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/pm_domain.h>



struct sh_cmt_priv {

	void __iomem *mapbase;
@@ -689,6 +690,9 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev) 
	struct sh_cmt_priv *p = platform_get_drvdata(pdev);

	int ret;



	if (!is_early_platform_device(pdev))

		pm_genpd_dev_always_on(&pdev->dev, true);



	if (p) {

		dev_info(&pdev->dev, "kept as earlytimer\n");

		return 0;

drivers/clocksource/sh_mtu2.c

+4 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/sh_timer.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/pm_domain.h>



struct sh_mtu2_priv {

	void __iomem *mapbase;
@@ -306,6 +307,9 @@ static int __devinit sh_mtu2_probe(struct platform_device *pdev) 
	struct sh_mtu2_priv *p = platform_get_drvdata(pdev);

	int ret;



	if (!is_early_platform_device(pdev))

		pm_genpd_dev_always_on(&pdev->dev, true);



	if (p) {

		dev_info(&pdev->dev, "kept as earlytimer\n");

		return 0;

drivers/clocksource/sh_tmu.c

+4 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include <linux/sh_timer.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/pm_domain.h>



struct sh_tmu_priv {

	void __iomem *mapbase;
@@ -410,6 +411,9 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev) 
	struct sh_tmu_priv *p = platform_get_drvdata(pdev);

	int ret;



	if (!is_early_platform_device(pdev))

		pm_genpd_dev_always_on(&pdev->dev, true);



	if (p) {

		dev_info(&pdev->dev, "kept as earlytimer\n");

		return 0;