diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-uclass.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c index 7651d5360d6..4d40738e5aa 100644 --- a/drivers/gpio/gpio-uclass.c +++ b/drivers/gpio/gpio-uclass.c @@ -877,8 +877,19 @@ static int get_function(struct udevice *dev, int offset, bool skip_unused, return -ENODEV; if (offset < 0 || offset >= uc_priv->gpio_count) return -EINVAL; - if (namep) + if (namep) { *namep = uc_priv->name[offset]; + /* Fall back to DT "gpio-line-names" for unrequested pins. */ + if (CONFIG_IS_ENABLED(DM_GPIO_LOOKUP_LINE_NAME) && + (!*namep || !**namep)) { + const char *dt_name = NULL; + + if (!dev_read_string_index(dev, "gpio-line-names", + offset, &dt_name) && + dt_name && *dt_name) + *namep = dt_name; + } + } if (skip_unused && !gpio_is_claimed(uc_priv, offset)) return GPIOF_UNUSED; if (ops->get_function) { |