diff options
Diffstat (limited to 'drivers/button/button-gpio.c')
| -rw-r--r-- | drivers/button/button-gpio.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/button/button-gpio.c b/drivers/button/button-gpio.c index 43b82d98aeb..31b85c8150e 100644 --- a/drivers/button/button-gpio.c +++ b/drivers/button/button-gpio.c @@ -20,6 +20,9 @@ static enum button_state_t button_gpio_get_state(struct udevice *dev) struct button_gpio_priv *priv = dev_get_priv(dev); int ret; + if (!priv) + return -ENODATA; + if (!dm_gpio_is_valid(&priv->gpio)) return -EREMOTEIO; ret = dm_gpio_get_value(&priv->gpio); @@ -32,6 +35,8 @@ static enum button_state_t button_gpio_get_state(struct udevice *dev) static int button_gpio_get_code(struct udevice *dev) { struct button_gpio_priv *priv = dev_get_priv(dev); + if (!priv) + return -ENODATA; int code = priv->linux_code; if (!code) @@ -51,7 +56,7 @@ static int button_gpio_probe(struct udevice *dev) return 0; ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_IN); - if (ret) + if (ret || !dm_gpio_is_valid(&priv->gpio)) return ret; ret = dev_read_u32(dev, "linux,code", &priv->linux_code); @@ -98,6 +103,8 @@ static int button_gpio_bind(struct udevice *parent) return ret; uc_plat = dev_get_uclass_plat(dev); uc_plat->label = label; + debug("Button '%s' bound to driver '%s'\n", label, + dev->driver->name); } return 0; |