drivers: clk: Fix using assigned-clocks in the node of the clock it sets up

This fixes the case where assigned-clocks is used to define a clock
defaults inside this same clock's node. This is used sometimes to setup a
default parents and/or rate for a clock.

example:
muxed_clock: muxed_clock {
	clocks = <&clk_provider 0>, <&clk_provider 1>;
	#clock-cells = <0>;
	assigned-clocks = <&muxed_clock>;
	assigned-clock-parents = <&clk_provider 1>;
};

It doesn't work in u-boot because the assigned-clocks are setup *before*
the clock is probed. (clk_set_parent() will likely crash or fail if called
before the device probe function)
Making it work by handling "assigned-clocks" in 2 steps: first before the
clk device is probed, and then after the clk device is probed.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/include/clk.h b/include/clk.h
index 9be3264113f..a5ee53d94aa 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -244,10 +244,13 @@ static inline int clk_release_all(struct clk *clk, int count)
  *
  * @dev:        A device to process (the ofnode associated with this device
  *              will be processed).
+ * @stage:	A integer. 0 indicates that this is called before the device
+ *		is probed. 1 indicates that this is called just after the
+ *		device has been probed
  */
-int clk_set_defaults(struct udevice *dev);
+int clk_set_defaults(struct udevice *dev, int stage);
 #else
-static inline int clk_set_defaults(struct udevice *dev)
+static inline int clk_set_defaults(struct udevice *dev, int stage)
 {
 	return 0;
 }