Linux event code may be used in input devices, using buttons.
Signed-off-by: Dzmitry Sankouski dsankouski@gmail.com --- drivers/button/button-gpio.c | 20 ++++++++++++++++++++ drivers/button/button-uclass.c | 10 ++++++++++ include/button.h | 16 ++++++++++++++++ 3 files changed, 46 insertions(+)
diff --git a/drivers/button/button-gpio.c b/drivers/button/button-gpio.c index dbb000622c..e6eff5c1da 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; + u32 linux_code; };
static enum button_state_t button_gpio_get_state(struct udevice *dev) @@ -29,10 +30,22 @@ static enum button_state_t button_gpio_get_state(struct udevice *dev) return ret ? BUTTON_ON : BUTTON_OFF; }
+static u32 button_gpio_get_code(struct udevice *dev) +{ + struct button_gpio_priv *priv = dev_get_priv(dev); + u32 code = priv->linux_code; + + if (!code) + return 0; + + return code; +} + static int button_gpio_probe(struct udevice *dev) { struct button_uc_plat *uc_plat = dev_get_uclass_plat(dev); struct button_gpio_priv *priv = dev_get_priv(dev); + u32 linux_code; int ret;
/* Ignore the top-level button node */ @@ -43,6 +56,12 @@ static int button_gpio_probe(struct udevice *dev) if (ret) return ret;
+ linux_code = dev_read_u32_default(dev, "linux,code", -ENODATA); + debug("linux code value: %d, ret: %d", linux_code, ret); + if (ret) + return ret; + priv->linux_code = linux_code; + return 0; }
@@ -92,6 +111,7 @@ static int button_gpio_bind(struct udevice *parent)
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 e33ed7d01d..6d0c6f69c5 100644 --- a/drivers/button/button-uclass.c +++ b/drivers/button/button-uclass.c @@ -38,6 +38,16 @@ enum button_state_t button_get_state(struct udevice *dev) return ops->get_state(dev); }
+u32 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", diff --git a/include/button.h b/include/button.h index 96e6b1901f..27af4a6a1a 100644 --- a/include/button.h +++ b/include/button.h @@ -37,6 +37,14 @@ struct button_ops { * @return button state button_state_t, or -ve on error */ enum button_state_t (*get_state)(struct udevice *dev); + + /** + * get_code() - get linux event code of a button + * + * @dev: button device to change + * @return button code, or -ve on error + */ + u32 (*get_code)(struct udevice *dev); };
#define button_get_ops(dev) ((struct button_ops *)(dev)->driver->ops) @@ -58,4 +66,12 @@ int button_get_by_label(const char *label, struct udevice **devp); */ enum button_state_t button_get_state(struct udevice *dev);
+/** + * button_get_code() - get linux event code of a button + * + * @dev: button device to change + * @return button code, or -ve on error + */ +u32 button_get_code(struct udevice *dev); + #endif