From: Hubert Feurstein <hubert.feurst...@deto.at>
This patch adds support for the default-state device tree property.
Signed-off-by: Hubert Feurstein <h.feurst...@gmail.com>
---
drivers/led/led-gpio.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/led/led-gpio.c b/drivers/led/led-gpio.c
index a1a6617..69ad7e7 100644
--- a/drivers/led/led-gpio.c
+++ b/drivers/led/led-gpio.c
@@ -204,6 +204,7 @@ static int led_gpio_of_probe(struct device_d *dev)
for_each_child_of_node(dev->device_node, child) {
struct gpio_led *gled;
+ const char *default_state;
enum of_gpio_flags flags;
int gpio;
const char *label;
@@ -225,6 +226,18 @@ static int led_gpio_of_probe(struct device_d *dev)
led_gpio_register(gled);
led_of_parse_trigger(&gled->led, child);
+
+ if (!of_property_read_string(child, "default-state",
&default_state)) {
+ int state = -1;
+
+ if (!strcmp(default_state, "on"))
+ state = 1;
+ else if (!strcmp(default_state, "off"))
+ state = 0;
+
+ if (state >= 0)
+ led_gpio_set(&gled->led, state ^
gled->active_low);
+ }
}
return 0;
--
2.3.0
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