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PM / Domains: Move code from under #ifdef CONFIG_PM_RUNTIME (v2)

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There is some code in drivers/base/power/domain.c that will be useful
for both runtime PM and system-wide power transitions, so make it
depend on CONFIG_PM instead of CONFIG_PM_RUNTIME.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Rafael J. Wysocki 2011-07-01 22:13:10 +02:00
parent e529192883
commit 5248051b9a
1 changed files with 65 additions and 55 deletions
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120
drivers/base/power/domain.c
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@ -14,7 +14,15 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/err.h> #include <linux/err.h>
#ifdef CONFIG_PM_RUNTIME #ifdef CONFIG_PM
static struct generic_pm_domain *dev_to_genpd(struct device *dev)
{
if (IS_ERR_OR_NULL(dev->pm_domain))
return ERR_PTR(-EINVAL);
return container_of(dev->pm_domain, struct generic_pm_domain, domain);
}
static void genpd_sd_counter_dec(struct generic_pm_domain *genpd) static void genpd_sd_counter_dec(struct generic_pm_domain *genpd)
{ {
@ -22,6 +30,58 @@ static void genpd_sd_counter_dec(struct generic_pm_domain *genpd)
genpd->sd_count--; genpd->sd_count--;
} }
/**
* pm_genpd_poweron - Restore power to a given PM domain and its parents.
* @genpd: PM domain to power up.
*
* Restore power to @genpd and all of its parents so that it is possible to
* resume a device belonging to it.
*/
static int pm_genpd_poweron(struct generic_pm_domain *genpd)
{
int ret = 0;
start:
if (genpd->parent)
mutex_lock(&genpd->parent->lock);
mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING);
if (!genpd->power_is_off)
goto out;
if (genpd->parent && genpd->parent->power_is_off) {
mutex_unlock(&genpd->lock);
mutex_unlock(&genpd->parent->lock);
ret = pm_genpd_poweron(genpd->parent);
if (ret)
return ret;
goto start;
}
if (genpd->power_on) {
int ret = genpd->power_on(genpd);
if (ret)
goto out;
}
genpd->power_is_off = false;
if (genpd->parent)
genpd->parent->sd_count++;
out:
mutex_unlock(&genpd->lock);
if (genpd->parent)
mutex_unlock(&genpd->parent->lock);
return ret;
}
#endif /* CONFIG_PM */
#ifdef CONFIG_PM_RUNTIME
/** /**
* __pm_genpd_save_device - Save the pre-suspend state of a device. * __pm_genpd_save_device - Save the pre-suspend state of a device.
* @dle: Device list entry of the device to save the state of. * @dle: Device list entry of the device to save the state of.
@ -174,11 +234,10 @@ static int pm_genpd_runtime_suspend(struct device *dev)
dev_dbg(dev, "%s()\n", __func__); dev_dbg(dev, "%s()\n", __func__);
if (IS_ERR_OR_NULL(dev->pm_domain)) genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL; return -EINVAL;
genpd = container_of(dev->pm_domain, struct generic_pm_domain, domain);
if (genpd->parent) if (genpd->parent)
mutex_lock(&genpd->parent->lock); mutex_lock(&genpd->parent->lock);
mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING);
@ -200,54 +259,6 @@ static int pm_genpd_runtime_suspend(struct device *dev)
return 0; return 0;
} }
/**
* pm_genpd_poweron - Restore power to a given PM domain and its parents.
* @genpd: PM domain to power up.
*
* Restore power to @genpd and all of its parents so that it is possible to
* resume a device belonging to it.
*/
static int pm_genpd_poweron(struct generic_pm_domain *genpd)
{
int ret = 0;
start:
if (genpd->parent)
mutex_lock(&genpd->parent->lock);
mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING);
if (!genpd->power_is_off)
goto out;
if (genpd->parent && genpd->parent->power_is_off) {
mutex_unlock(&genpd->lock);
mutex_unlock(&genpd->parent->lock);
ret = pm_genpd_poweron(genpd->parent);
if (ret)
return ret;
goto start;
}
if (genpd->power_on) {
int ret = genpd->power_on(genpd);
if (ret)
goto out;
}
genpd->power_is_off = false;
if (genpd->parent)
genpd->parent->sd_count++;
out:
mutex_unlock(&genpd->lock);
if (genpd->parent)
mutex_unlock(&genpd->parent->lock);
return ret;
}
/** /**
* pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain. * pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain.
* @dev: Device to resume. * @dev: Device to resume.
@ -264,11 +275,10 @@ static int pm_genpd_runtime_resume(struct device *dev)
dev_dbg(dev, "%s()\n", __func__); dev_dbg(dev, "%s()\n", __func__);
if (IS_ERR_OR_NULL(dev->pm_domain)) genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL; return -EINVAL;
genpd = container_of(dev->pm_domain, struct generic_pm_domain, domain);
ret = pm_genpd_poweron(genpd); ret = pm_genpd_poweron(genpd);
if (ret) if (ret)
return ret; return ret;