#ifndef _CLK_H_
#define _CLK_H_
+#include <errno.h>
+#include <linux/types.h>
+
+struct udevice;
+
int soc_clk_dump(void);
struct clk_ops {
ulong (*set_rate)(struct udevice *dev, ulong rate);
/**
- * clk_set_periph_rate() - Set clock rate for a peripheral
- *
- * @dev: Device to adjust (UCLASS_CLK)
- * @rate: New clock rate in Hz
- * @return new clock rate in Hz, or -ve error code
- */
+ * 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)
+ * @periph: Peripheral ID to check
+ * @return clock rate in Hz, or -ve error code
+ */
ulong (*get_periph_rate)(struct udevice *dev, int periph);
/**
- * clk_set_periph_rate() - Set current clock rate for a peripheral
+ * set_periph_rate() - Set current clock rate for a peripheral
*
* @dev: Device to update (UCLASS_CLK)
- * @periph: Peripheral ID to cupdate
+ * @periph: Peripheral ID to update
* @return new clock rate in Hz, or -ve error code
*/
ulong (*set_periph_rate)(struct udevice *dev, int periph, ulong rate);
ulong clk_get_rate(struct udevice *dev);
/**
- * set_rate() - Set current clock rate
+ * clk_set_rate() - Set current clock rate
*
* @dev: Device to adjust
* @rate: New clock rate in Hz
*/
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
*
* clk_set_periph_rate() - Set current clock rate for a peripheral
*
* @dev: Device to update (UCLASS_CLK)
- * @periph: Peripheral ID to cupdate
+ * @periph: Peripheral ID to update
* @return new clock rate in Hz, or -ve error code
*/
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_ */