diff options
Diffstat (limited to 'include/clk.h')
| -rw-r--r-- | include/clk.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/clk.h b/include/clk.h index 941808a50e..ca20c3dd27 100644 --- a/include/clk.h +++ b/include/clk.h @@ -8,6 +8,7 @@ #ifndef _CLK_H_ #define _CLK_H_ +#include <errno.h> #include <linux/types.h> struct udevice; @@ -105,4 +106,27 @@ ulong clk_get_periph_rate(struct udevice *dev, int periph); */ 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_ */ |