[PATCH 6/8] PM / Domains: Move code from under #ifdef CONFIG_PM_RUNTIME

From: Rafael J. Wysocki
Date: Sat Jun 11 2011 - 16:40:57 EST


From: Rafael J. Wysocki <rjw@xxxxxxx>

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@xxxxxxx>
---
drivers/base/power/domain.c | 118 +++++++++++++++++++++++---------------------
1 file changed, 64 insertions(+), 54 deletions(-)

Index: linux-2.6/drivers/base/power/domain.c
===================================================================
--- linux-2.6.orig/drivers/base/power/domain.c
+++ linux-2.6/drivers/base/power/domain.c
@@ -14,6 +14,66 @@
#include <linux/slab.h>
#include <linux/err.h>

+#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);
+}
+
+/**
+ * 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(&genpd->lock);
+
+ 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->domain);
+ 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

static void genpd_sd_counter_dec(struct generic_pm_domain *genpd)
@@ -155,11 +215,10 @@ static int pm_genpd_runtime_suspend(stru

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(&genpd->lock);
@@ -182,54 +241,6 @@ static int pm_genpd_runtime_suspend(stru
}

/**
- * 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(&genpd->lock);
-
- 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->domain);
- 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.
*
@@ -245,11 +256,10 @@ static int pm_genpd_runtime_resume(struc

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;

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