clk: add API to enable clock
The most basic thing for clock is to enable it, but it is missing
in this uclass.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/include/clk.h b/include/clk.h
index 371784a..941808a 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -33,6 +33,15 @@
ulong (*set_rate)(struct udevice *dev, ulong rate);
/**
+ * enable() - Enable the clock for a peripheral
+ *
+ * @dev: clock provider
+ * @periph: Peripheral ID to enable
+ * @return zero on success, or -ve error code
+ */
+ int (*enable)(struct udevice *dev, int periph);
+
+ /**
* get_periph_rate() - Get clock rate for a peripheral
*
* @dev: Device to check (UCLASS_CLK)
@@ -71,6 +80,15 @@
ulong clk_set_rate(struct udevice *dev, ulong rate);
/**
+ * clk_enable() - Enable the clock for a peripheral
+ *
+ * @dev: clock provider
+ * @periph: Peripheral ID to enable
+ * @return zero on success, or -ve error code
+ */
+int clk_enable(struct udevice *dev, int periph);
+
+/**
* clk_get_periph_rate() - Get current clock rate for a peripheral
*
* @dev: Device to check (UCLASS_CLK)