[PATCH v6 3/3] led: Add dts property to specify blinking of the led
Mikhail Kshevetskiy
mikhail.kshevetskiy at iopsys.eu
Fri Jul 19 11:12:13 CEST 2024
From: Michael Polyntsov <michael.polyntsov at iopsys.eu>
The standard property
linux,default-trigger = "pattern";
used to get an effect. No blinking parameters can be set yet.
Signed-off-by: Michael Polyntsov <michael.polyntsov at iopsys.eu>
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
---
drivers/led/led-uclass.c | 30 +++++++++++++++++++++++++-----
1 file changed, 25 insertions(+), 5 deletions(-)
diff --git a/drivers/led/led-uclass.c b/drivers/led/led-uclass.c
index e6312d1dc41..199d68bc25a 100644
--- a/drivers/led/led-uclass.c
+++ b/drivers/led/led-uclass.c
@@ -118,6 +118,14 @@ static int led_post_bind(struct udevice *dev)
else
return 0;
+ if (IS_ENABLED(CONFIG_LED_BLINK)) {
+ const char *trigger;
+
+ trigger = dev_read_string(dev, "linux,default-trigger");
+ if (trigger && !strncmp(trigger, "pattern", 7))
+ uc_plat->default_state = LEDST_BLINK;
+ }
+
/*
* In case the LED has default-state DT property, trigger
* probe() to configure its default state during startup.
@@ -130,12 +138,24 @@ static int led_post_bind(struct udevice *dev)
static int led_post_probe(struct udevice *dev)
{
struct led_uc_plat *uc_plat = dev_get_uclass_plat(dev);
+ int default_period_ms = 1000;
+ int ret = 0;
+
+ switch (uc_plat->default_state) {
+ case LEDST_ON:
+ case LEDST_OFF:
+ ret = led_set_state(dev, uc_plat->default_state);
+ break;
+ case LEDST_BLINK:
+ ret = led_set_period(dev, default_period_ms);
+ if (!ret)
+ ret = led_set_state(dev, uc_plat->default_state);
+ break;
+ default:
+ break;
+ }
- if (uc_plat->default_state == LEDST_ON ||
- uc_plat->default_state == LEDST_OFF)
- led_set_state(dev, uc_plat->default_state);
-
- return 0;
+ return ret;
}
UCLASS_DRIVER(led) = {
--
2.39.2
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