diff options
| author | Simon Glass <sjg@chromium.org> | 2017-04-10 11:34:57 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2017-04-14 19:38:57 -0600 |
| commit | 53378dac8dc33e3fd5f07d60bd7a5f8258ac7a20 (patch) | |
| tree | 13613de1ea3ed6d991b440f0797cb25a671da40d /include | |
| parent | 9413ad4f0def2e06a5042106a6e1650a1aa03a5a (diff) | |
| download | u-boot-53378dac8dc33e3fd5f07d60bd7a5f8258ac7a20.tar.gz | |
dm: led: Add support for blinking LEDs
Allow LEDs to be blinked if the driver supports it. Enable this for
sandbox so that the tests run.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ziping Chen <techping.chan@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/led.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/led.h b/include/led.h index 8c107e28e7..c67af22591 100644 --- a/include/led.h +++ b/include/led.h @@ -17,10 +17,22 @@ struct led_uc_plat { const char *label; }; +/** + * struct led_uc_priv - Private data the uclass stores about each device + * + * @period_ms: Flash period in milliseconds + */ +struct led_uc_priv { + int period_ms; +}; + enum led_state_t { LEDST_OFF = 0, LEDST_ON = 1, LEDST_TOGGLE, +#ifdef CONFIG_LED_BLINK + LEDST_BLINK, +#endif LEDST_COUNT, }; @@ -42,6 +54,20 @@ struct led_ops { * @return LED state led_state_t, or -ve on error */ enum led_state_t (*get_state)(struct udevice *dev); + +#ifdef CONFIG_LED_BLINK + /** + * led_set_period() - set the blink period of an LED + * + * Thie records the period if supported, or returns -ENOSYS if not. + * To start the LED blinking, use set_state(). + * + * @dev: LED device to change + * @period_ms: LED blink period in milliseconds + * @return 0 if OK, -ve on error + */ + int (*set_period)(struct udevice *dev, int period_ms); +#endif }; #define led_get_ops(dev) ((struct led_ops *)(dev)->driver->ops) @@ -72,4 +98,13 @@ int led_set_state(struct udevice *dev, enum led_state_t state); */ enum led_state_t led_get_state(struct udevice *dev); +/** + * led_set_period() - set the blink period of an LED + * + * @dev: LED device to change + * @period_ms: LED blink period in milliseconds + * @return 0 if OK, -ve on error + */ +int led_set_period(struct udevice *dev, int period_ms); + #endif |