Current the label is retrieved by the line-name property but this is a
optional property. In case of a missing line-name property the label is
NULL. As the binding documentation told, the gpio-label must be set to
the device-node name in case of missing line-name property.
Fixes: 37e6bee7e5 ("gpiolib: Add support for GPIO "hog" nodes")
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
---
drivers/gpio/gpiolib.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 4e0bf73742..982bec0b69 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -382,7 +382,10 @@ static int of_hog_gpio(struct device_node *np, struct gpio_chip *chip,
else
return -EINVAL;
- of_property_read_string(np, "line-name", &name);
+ /* The line-name is optional and if not present the node name is used */
+ ret = of_property_read_string(np, "line-name", &name);
+ if (ret < 0)
+ name = np->name;
return gpio_request_one(gpio, flags, name);
}
--
2.19.0
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