clk: Extend struct clk to provide information regarding clock rate
This commit extends the struct clk to provide information regarding the
clock rate.
As a result the clock tree traversal is performed at most once, and further
reads are using the cached value.
Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/include/clk.h b/include/clk.h
index a909b71..d7b937c 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -40,6 +40,7 @@
* other clock APIs to identify which clock signal to operate upon.
*
* @dev: The device which implements the clock signal.
+ * @rate: The clock rate (in HZ).
* @id: The clock signal ID within the provider.
* @data: An optional data field for scenarios where a single integer ID is not
* sufficient. If used, it can be populated through an .of_xlate op and
@@ -55,6 +56,7 @@
*/
struct clk {
struct udevice *dev;
+ long long rate; /* in HZ */
/*
* Written by of_xlate. In the future, we might add more fields here.
*/