[PATCH v5 2/2] led: Add dts property to specify blinking of the led
Mikhail Kshevetskiy
mikhail.kshevetskiy at iopsys.eu
Fri Jul 12 07:25:07 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 | 33 +++++++++++++++++++++++++++++----
1 file changed, 29 insertions(+), 4 deletions(-)
diff --git a/drivers/led/led-uclass.c b/drivers/led/led-uclass.c
index 4f5dd66765e..90047ad35ba 100644
--- a/drivers/led/led-uclass.c
+++ b/drivers/led/led-uclass.c
@@ -100,6 +100,9 @@ static int led_post_bind(struct udevice *dev)
{
struct led_uc_plat *uc_plat = dev_get_uclass_plat(dev);
const char *default_state;
+#ifdef CONFIG_LED_BLINK
+ const char *trigger;
+#endif
if (!uc_plat->label)
uc_plat->label = dev_read_string(dev, "label");
@@ -120,6 +123,12 @@ static int led_post_bind(struct udevice *dev)
else
return 0;
+#ifdef CONFIG_LED_BLINK
+ trigger = dev_read_string(dev, "linux,default-trigger");
+ if (trigger && !strncmp(trigger, "pattern", 7))
+ uc_plat->default_state = LEDST_BLINK;
+#endif
+
/*
* In case the LED has default-state DT property, trigger
* probe() to configure its default state during startup.
@@ -132,12 +141,28 @@ 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 rc = 0;
- if (uc_plat->default_state == LEDST_ON ||
- uc_plat->default_state == LEDST_OFF)
- led_set_state(dev, uc_plat->default_state);
+ switch (uc_plat->default_state) {
+ case LEDST_ON:
+ case LEDST_OFF:
+ rc = led_set_state(dev, uc_plat->default_state);
+ break;
+#ifdef CONFIG_LED_BLINK
+ case LEDST_BLINK: {
+ const int default_period_ms = 1000;
- return 0;
+ rc = led_set_period(dev, default_period_ms);
+ if (rc == 0)
+ rc = led_set_state(dev, uc_plat->default_state);
+ break;
+ }
+#endif
+ default:
+ break;
+ }
+
+ return rc;
}
UCLASS_DRIVER(led) = {
--
2.39.2
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