From: Ziping Chen <techping.c...@gmail.com>
The status of a GPIO-connected LED can be read back by reading the GPO
value.
Add the support for get_status function in led_gpio driver.
Signed-off-by: Ziping Chen <techping.c...@gmail.com>
---
drivers/led/led_gpio.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/led/led_gpio.c b/drivers/led/led_gpio.c
index 5b11990..b64721e 100644
--- a/drivers/led/led_gpio.c
+++ b/drivers/led/led_gpio.c
@@ -28,6 +28,16 @@ static int gpio_led_set_on(struct udevice *dev, int on)
return dm_gpio_set_value(&priv->gpio, on);
}
+static int gpio_led_get_status(struct udevice *dev)
+{
+ struct led_gpio_priv *priv = dev_get_priv(dev);
+
+ if (!dm_gpio_is_valid(&priv->gpio))
+ return -EREMOTEIO;
+
+ return dm_gpio_get_value(&priv->gpio);
+}
+
static int led_gpio_probe(struct udevice *dev)
{
struct led_uclass_plat *uc_plat = dev_get_uclass_platdata(dev);
@@ -88,6 +98,7 @@ static int led_gpio_bind(struct udevice *parent)
static const struct led_ops gpio_led_ops = {
.set_on = gpio_led_set_on,
+ .get_status = gpio_led_get_status,
};
static const struct udevice_id led_gpio_ids[] = {
--
2.7.4
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
