#ifndef _CLK_H_
#define _CLK_H_
+#include <errno.h>
#include <linux/types.h>
struct udevice;
*/
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
*
*/
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
*
*/
ulong clk_set_periph_rate(struct udevice *dev, int periph, ulong rate);
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+/**
+ * clk_get_by_index() - look up a clock referenced by a device
+ *
+ * Parse a device's 'clocks' list, returning information on the indexed clock,
+ * ensuring that it is activated.
+ *
+ * @dev: Device containing the clock reference
+ * @index: Clock index to return (0 = first)
+ * @clk_devp: Returns clock device
+ * @return: Peripheral ID for the device to control. This is the first
+ * argument after the clock node phandle. If there is no arguemnt,
+ * returns 0. Return -ve error code on any error
+ */
+int clk_get_by_index(struct udevice *dev, int index, struct udevice **clk_devp);
+#else
+static inline int clk_get_by_index(struct udevice *dev, int index,
+ struct udevice **clk_devp)
+{
+ return -ENOSYS;
+}
+#endif
+
#endif /* _CLK_H_ */