dm: button: add support for linux_code in button-gpio.c driver
Linux event code must be used in input devices, using buttons.
Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/button/button-gpio.c b/drivers/button/button-gpio.c
index dbb0006..7b5b3af 100644
--- a/drivers/button/button-gpio.c
+++ b/drivers/button/button-gpio.c
@@ -13,6 +13,7 @@
struct button_gpio_priv {
struct gpio_desc gpio;
+ int linux_code;
};
static enum button_state_t button_gpio_get_state(struct udevice *dev)
@@ -29,6 +30,17 @@
return ret ? BUTTON_ON : BUTTON_OFF;
}
+static int button_gpio_get_code(struct udevice *dev)
+{
+ struct button_gpio_priv *priv = dev_get_priv(dev);
+ int code = priv->linux_code;
+
+ if (!code)
+ return -ENODATA;
+
+ return code;
+}
+
static int button_gpio_probe(struct udevice *dev)
{
struct button_uc_plat *uc_plat = dev_get_uclass_plat(dev);
@@ -43,7 +55,9 @@
if (ret)
return ret;
- return 0;
+ ret = dev_read_u32(dev, "linux,code", &priv->linux_code);
+
+ return ret;
}
static int button_gpio_remove(struct udevice *dev)
@@ -92,6 +106,7 @@
static const struct button_ops button_gpio_ops = {
.get_state = button_gpio_get_state,
+ .get_code = button_gpio_get_code,
};
static const struct udevice_id button_gpio_ids[] = {
diff --git a/drivers/button/button-uclass.c b/drivers/button/button-uclass.c
index e33ed7d..032191d 100644
--- a/drivers/button/button-uclass.c
+++ b/drivers/button/button-uclass.c
@@ -38,6 +38,16 @@
return ops->get_state(dev);
}
+int button_get_code(struct udevice *dev)
+{
+ struct button_ops *ops = button_get_ops(dev);
+
+ if (!ops->get_code)
+ return -ENOSYS;
+
+ return ops->get_code(dev);
+}
+
UCLASS_DRIVER(button) = {
.id = UCLASS_BUTTON,
.name = "button",