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>
diff --git a/include/led.h b/include/led.h
index 8c107e2..c67af22 100644
--- a/include/led.h
+++ b/include/led.h
@@ -17,10 +17,22 @@
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 @@
* @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 @@
*/
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