From: Christian Marangi <ansuelsmth@gmail.com>
Date: Tue, 1 Oct 2024 12:24:34 +0000 (+0200)
Subject: led: toggle LED on initial SW blink
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-favicon.png?a=commitdiff_plain;h=9e3d83301e4f34064e09376bb6f2e199f21411de;p=u-boot.git

led: toggle LED on initial SW blink

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>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
---

diff --git a/drivers/led/led_sw_blink.c b/drivers/led/led_sw_blink.c
index 9e36edbee4..06a43db340 100644
--- a/drivers/led/led_sw_blink.c
+++ b/drivers/led/led_sw_blink.c
@@ -103,8 +103,21 @@ bool led_sw_on_state_change(struct udevice *dev, enum led_state_t state)
 		return false;
 
 	if (state == LEDST_BLINK) {
-		/* start blinking on next led_sw_blink() call */
-		sw_blink->state = LED_SW_BLINK_ST_OFF;
+		struct led_ops *ops = led_get_ops(dev);
+
+		/*
+		 * toggle LED initially and start blinking on next
+		 * led_sw_blink() call.
+		 */
+		switch (ops->get_state(dev)) {
+		case LEDST_ON:
+			ops->set_state(dev, LEDST_OFF);
+			sw_blink->state = LED_SW_BLINK_ST_OFF;
+		default:
+			ops->set_state(dev, LEDST_ON);
+			sw_blink->state = LED_SW_BLINK_ST_ON;
+		}
+
 		return true;
 	}