diff options
author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-07-01 20:13:10 (GMT) |
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committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-07-02 12:29:55 (GMT) |
commit | 5248051b9afb6684cd817b2fbdaefa5063761dab (patch) | |
tree | 44782bb3ae2330f676e053d1b3a8aad4d2abb6e7 /drivers | |
parent | e5291928839877f8e73c2643ee1d3fe0bcdcaf5c (diff) | |
download | linux-fsl-qoriq-5248051b9afb6684cd817b2fbdaefa5063761dab.tar.xz |
PM / Domains: Move code from under #ifdef CONFIG_PM_RUNTIME (v2)
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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/base/power/domain.c | 120 |
1 files changed, 65 insertions, 55 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index fd31be3..f14ba32 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -14,7 +14,15 @@ #include <linux/slab.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) { @@ -23,6 +31,58 @@ static void genpd_sd_counter_dec(struct generic_pm_domain *genpd) } /** + * 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. * @dle: Device list entry of the device to save the state of. * @genpd: PM domain the device belongs to. @@ -174,11 +234,10 @@ static int pm_genpd_runtime_suspend(struct device *dev) 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; - genpd = container_of(dev->pm_domain, struct generic_pm_domain, domain); - if (genpd->parent) mutex_lock(&genpd->parent->lock); mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); @@ -201,54 +260,6 @@ static int pm_genpd_runtime_suspend(struct device *dev) } /** - * 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. * @dev: Device to resume. * @@ -264,11 +275,10 @@ static int pm_genpd_runtime_resume(struct device *dev) 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; - genpd = container_of(dev->pm_domain, struct generic_pm_domain, domain); - ret = pm_genpd_poweron(genpd); if (ret) return ret; |