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-rw-r--r--include/clk.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/include/clk.h b/include/clk.h
index 6568865d40..9be3264113 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -155,6 +155,37 @@ int clk_get_bulk(struct udevice *dev, struct clk_bulk *bulk);
int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk);
/**
+ * devm_clk_get - lookup and obtain a managed reference to a clock producer.
+ * @dev: device for clock "consumer"
+ * @id: clock consumer ID
+ *
+ * Returns a struct clk corresponding to the clock producer, or
+ * valid IS_ERR() condition containing errno. The implementation
+ * uses @dev and @id to determine the clock consumer, and thereby
+ * the clock producer. (IOW, @id may be identical strings, but
+ * clk_get may return different clock producers depending on @dev.)
+ *
+ * Drivers must assume that the clock source is not enabled.
+ *
+ * devm_clk_get should not be called from within interrupt context.
+ *
+ * The clock will automatically be freed when the device is unbound
+ * from the bus.
+ */
+struct clk *devm_clk_get(struct udevice *dev, const char *id);
+
+/**
+ * devm_clk_get_optional - lookup and obtain a managed reference to an optional
+ * clock producer.
+ * @dev: device for clock "consumer"
+ * @id: clock consumer ID
+ *
+ * Behaves the same as devm_clk_get() except where there is no clock producer.
+ * In this case, instead of returning -ENOENT, the function returns NULL.
+ */
+struct clk *devm_clk_get_optional(struct udevice *dev, const char *id);
+
+/**
* clk_release_all() - Disable (turn off)/Free an array of previously
* requested clocks.
*
@@ -168,6 +199,19 @@ int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk);
*/
int clk_release_all(struct clk *clk, int count);
+/**
+ * devm_clk_put - "free" a managed clock source
+ * @dev: device used to acquire the clock
+ * @clk: clock source acquired with devm_clk_get()
+ *
+ * Note: drivers must ensure that all clk_enable calls made on this
+ * clock source are balanced by clk_disable calls prior to calling
+ * this function.
+ *
+ * clk_put should not be called from within interrupt context.
+ */
+void devm_clk_put(struct udevice *dev, struct clk *clk);
+
#else
static inline int clk_get_by_index(struct udevice *dev, int index,
struct clk *clk)
@@ -379,3 +423,6 @@ int clk_get_by_id(ulong id, struct clk **clkp);
*/
bool clk_dev_binded(struct clk *clk);
#endif
+
+#define clk_prepare_enable(clk) clk_enable(clk)
+#define clk_disable_unprepare(clk) clk_disable(clk)