clk: add clk_set_parent()
Clocks may support multiple parents: this change introduces an
optional operation on the clk-uclass to set a clock's parent.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: David Wu <david.wu@rock-chips.com>
Series-changes: 2
- Fixed David's email address.
diff --git a/include/clk-uclass.h b/include/clk-uclass.h
index e7ea334..75933eb 100644
--- a/include/clk-uclass.h
+++ b/include/clk-uclass.h
@@ -78,6 +78,14 @@
*/
ulong (*set_rate)(struct clk *clk, ulong rate);
/**
+ * set_parent() - Set current clock parent
+ *
+ * @clk: The clock to manipulate.
+ * @parent: New clock parent.
+ * @return zero on success, or -ve error code.
+ */
+ int (*set_parent)(struct clk *clk, struct clk *parent);
+ /**
* enable() - Enable a clock.
*
* @clk: The clock to manipulate.
diff --git a/include/clk.h b/include/clk.h
index e7ce3e8..e463d8e 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -178,6 +178,17 @@
ulong clk_set_rate(struct clk *clk, ulong rate);
/**
+ * clk_set_parent() - Set current clock parent.
+ *
+ * @clk: A clock struct that was previously successfully requested by
+ * clk_request/get_by_*().
+ * @parent: A clock struct that was previously successfully requested by
+ * clk_request/get_by_*().
+ * @return new rate, or -ve error code.
+ */
+int clk_set_parent(struct clk *clk, struct clk *parent);
+
+/**
* clk_enable() - Enable (turn on) a clock.
*
* @clk: A clock struct that was previously successfully requested by