This patch save common LED property "default-state" value
in post bind of LED uclass.
The configuration for this default state is only performed when
led_default_state() is called;
It can be called in your board_init()
or it could added in init_sequence_r[] in future.
Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
---
Changes in v4:
- simplify the uclass impact after Patrick Bruenn review
Changes in v3: None
Changes in v2: None
drivers/led/led-uclass.c | 30 ++++++++++++++++++++++++++++++
drivers/led/led_gpio.c | 8 --------
include/led.h | 9 +++++++++
3 files changed, 39 insertions(+), 8 deletions(-)
diff --git a/drivers/led/led-uclass.c b/drivers/led/led-uclass.c
index 2f4d69e..2859475 100644
--- a/drivers/led/led-uclass.c
+++ b/drivers/led/led-uclass.c
@@ -8,6 +8,7 @@
#include <dm.h>
#include <errno.h>
#include <led.h>
+#include <dm/device-internal.h>
#include <dm/root.h>
#include <dm/uclass-internal.h>
@@ -63,6 +64,35 @@ int led_set_period(struct udevice *dev, int period_ms)
}
#endif
+int led_default_state(void)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ const char *default_state;
+ int ret;
+
+ ret = uclass_get(UCLASS_LED, &uc);
+ if (ret)
+ return ret;
+ for (uclass_find_first_device(UCLASS_LED, &dev);
+ dev;
+ uclass_find_next_device(&dev)) {
+ default_state = dev_read_string(dev, "default-state");
+ if (!default_state)
+ continue;
+ ret = device_probe(dev);
+ if (ret)
+ return ret;
+ if (!strncmp(default_state, "on", 2))
+ led_set_state(dev, LEDST_ON);
+ else if (!strncmp(default_state, "off", 3))
+ led_set_state(dev, LEDST_OFF);
+ /* default-state = "keep" : device is only probed */
+ }
+
+ return ret;
+}
+
UCLASS_DRIVER(led) = {
.id = UCLASS_LED,
.name = "led",
diff --git a/drivers/led/led_gpio.c b/drivers/led/led_gpio.c
index 533587d..93f6b91 100644
--- a/drivers/led/led_gpio.c
+++ b/drivers/led/led_gpio.c
@@ -57,7 +57,6 @@ static int led_gpio_probe(struct udevice *dev)
{
struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
struct led_gpio_priv *priv = dev_get_priv(dev);
- const char *default_state;
int ret;
/* Ignore the top-level LED node */
@@ -68,13 +67,6 @@ static int led_gpio_probe(struct udevice *dev)
if (ret)
return ret;
- default_state = dev_read_string(dev, "default-state");
- if (default_state) {
- if (!strncmp(default_state, "on", 2))
- gpio_led_set_state(dev, LEDST_ON);
- else if (!strncmp(default_state, "off", 3))
- gpio_led_set_state(dev, LEDST_OFF);
- }
return 0;
}
diff --git a/include/led.h b/include/led.h
index 940b97f..7bfdddf 100644
--- a/include/led.h
+++ b/include/led.h
@@ -106,4 +106,13 @@ enum led_state_t led_get_state(struct udevice *dev);
*/
int led_set_period(struct udevice *dev, int period_ms);
+/**
+ * led_default_state() - set the default state for all the LED
+ *
+ * This enables all leds which have default state.
+ * see Documentation/devicetree/bindings/leds/common.txt
+ *
+ */
+int led_default_state(void);
+
#endif
--
2.7.4
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