#include <linux/clkdev.h>
#include <linux/slab.h>
#include <linux/err.h>
+#include <linux/pm_runtime.h>
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_CLK
enum pce_status {
PCE_STATUS_NONE = 0,
* @dev: The device for the given clock
* @ce: PM clock entry corresponding to the clock.
*/
-static inline int __pm_clk_enable(struct device *dev, struct pm_clock_entry *ce)
+static inline void __pm_clk_enable(struct device *dev, struct pm_clock_entry *ce)
{
int ret;
dev_err(dev, "%s: failed to enable clk %p, error %d\n",
__func__, ce->clk, ret);
}
-
- return ret;
}
/**
} else {
clk_prepare(ce->clk);
ce->status = PCE_STATUS_ACQUIRED;
- dev_dbg(dev, "Clock %s managed by runtime PM.\n", ce->con_id);
+ dev_dbg(dev, "Clock %pC con_id %s managed by runtime PM.\n",
+ ce->clk, ce->con_id);
}
}
return -ENOMEM;
}
} else {
- if (IS_ERR(ce->clk) || !__clk_get(clk)) {
+ if (IS_ERR(clk)) {
kfree(ce);
return -ENOENT;
}
* @clk: Clock pointer
*
* Add the clock to the list of clocks used for the power management of @dev.
- * It will increment refcount on clock pointer, use clk_put() on it when done.
+ * The power-management code will take control of the clock reference, so
+ * callers should not call clk_put() on @clk after this function sucessfully
+ * returned.
*/
int pm_clk_add_clk(struct device *dev, struct clk *clk)
{
return 0;
}
-#else /* !CONFIG_PM */
+int pm_clk_runtime_suspend(struct device *dev)
+{
+ int ret;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ ret = pm_generic_runtime_suspend(dev);
+ if (ret) {
+ dev_err(dev, "failed to suspend device\n");
+ return ret;
+ }
+
+ ret = pm_clk_suspend(dev);
+ if (ret) {
+ dev_err(dev, "failed to suspend clock\n");
+ pm_generic_runtime_resume(dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+int pm_clk_runtime_resume(struct device *dev)
+{
+ int ret;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ ret = pm_clk_resume(dev);
+ if (ret) {
+ dev_err(dev, "failed to resume clock\n");
+ return ret;
+ }
+
+ return pm_generic_runtime_resume(dev);
+}
+
+#else /* !CONFIG_PM_CLK */
/**
* enable_clock - Enable a device clock.
return 0;
}
-#endif /* !CONFIG_PM */
+#endif /* !CONFIG_PM_CLK */
/**
* pm_clk_add_notifier - Add bus type notifier for power management clocks.