We currently init the LED OFF when SW blink is triggered when on_state_change() is called. This can be problematic for very short period as the ON/OFF blink might never trigger.
Toggle the LED (ON if OFF, OFF if ON) on initial SW blink to handle this corner case and better display a LED blink from the user.
Signed-off-by: Christian Marangi ansuelsmth@gmail.com Reviewed-by: Simon Glass sjg@chromium.org --- drivers/led/led_sw_blink.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/led/led_sw_blink.c b/drivers/led/led_sw_blink.c index 9e36edbee47..9d9820720c6 100644 --- a/drivers/led/led_sw_blink.c +++ b/drivers/led/led_sw_blink.c @@ -103,8 +103,16 @@ bool led_sw_on_state_change(struct udevice *dev, enum led_state_t state) return false;
if (state == LEDST_BLINK) { + struct led_ops *ops = led_get_ops(dev); + enum led_state_t curr_state = led_get_state(dev); + + curr_state = ops->get_state(dev); + /* toggle led initially */ + ops->set_state(dev, curr_state == LEDST_ON ? LEDST_OFF : + LEDST_ON); /* start blinking on next led_sw_blink() call */ - sw_blink->state = LED_SW_BLINK_ST_OFF; + sw_blink->state = curr_state == LEDST_ON ? LED_SW_BLINK_ST_OFF : + LED_SW_BLINK_ST_ON; return true; }