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-rw-r--r--drivers/base/power/clock_ops.c60
1 files changed, 59 insertions, 1 deletions
diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index c5624818259e..2fb9c121c64b 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -15,7 +15,7 @@
#include <linux/slab.h>
#include <linux/err.h>
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
struct pm_runtime_clk_data {
struct list_head clock_list;
@@ -191,6 +191,10 @@ void pm_runtime_clk_destroy(struct device *dev)
kfree(prd);
}
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_PM_RUNTIME
+
/**
* pm_runtime_clk_acquire - Acquire a device clock.
* @dev: Device whose clock is to be acquired.
@@ -330,6 +334,60 @@ static int pm_runtime_clk_notify(struct notifier_block *nb,
#else /* !CONFIG_PM_RUNTIME */
+#ifdef CONFIG_PM
+
+/**
+ * pm_runtime_clk_suspend - Disable clocks in a device's PM clock list.
+ * @dev: Device to disable the clocks for.
+ */
+int pm_runtime_clk_suspend(struct device *dev)
+{
+ struct pm_runtime_clk_data *prd = __to_prd(dev);
+ struct pm_clock_entry *ce;
+
+ dev_dbg(dev, "%s()\n", __func__);
+
+ /* If there is no driver, the clocks are already disabled. */
+ if (!prd || !dev->driver)
+ return 0;
+
+ mutex_lock(&prd->lock);
+
+ list_for_each_entry_reverse(ce, &prd->clock_list, node)
+ clk_disable(ce->clk);
+
+ mutex_unlock(&prd->lock);
+
+ return 0;
+}
+
+/**
+ * pm_runtime_clk_resume - Enable clocks in a device's PM clock list.
+ * @dev: Device to enable the clocks for.
+ */
+int pm_runtime_clk_resume(struct device *dev)
+{
+ struct pm_runtime_clk_data *prd = __to_prd(dev);
+ struct pm_clock_entry *ce;
+
+ dev_dbg(dev, "%s()\n", __func__);
+
+ /* If there is no driver, the clocks should remain disabled. */
+ if (!prd || !dev->driver)
+ return 0;
+
+ mutex_lock(&prd->lock);
+
+ list_for_each_entry(ce, &prd->clock_list, node)
+ clk_enable(ce->clk);
+
+ mutex_unlock(&prd->lock);
+
+ return 0;
+}
+
+#endif /* CONFIG_PM */
+
/**
* enable_clock - Enable a device clock.
* @dev: Device whose clock is to be enabled.
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