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leds: leds-gpio: Fix multiple instances registration without 'label' property 

Since commit a43f2cbbb0 ("leds: leds-gpio: Make use of device property
API") it is no longer possible to register multiple gpio leds without passing
the 'label' property.

According to Documentation/devicetree/bindings/leds/common.txt:

"Optional properties for child nodes:
- label : The label for this LED.  If omitted, the label is
  taken from the node name (excluding the unit address)."

So retrieve the node name when the 'label' property is absent to keep the old
behaviour and fix this regression.

Fixes: a43f2cbbb0 (leds: leds-gpio: Make use of device property API)
Reported-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Fabio Estevam 2014-12-04 02:28:19 +01:00 committed by Rafael J. Wysocki
parent ec98a4975e
commit 29470ea8d8
1 changed files with 11 additions and 1 deletions
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12
drivers/leds/leds-gpio.c
View File

@ -170,6 +170,7 @@ static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
struct fwnode_handle *child;
struct gpio_leds_priv *priv;
int count, ret;
struct device_node *np;
count = device_get_child_node_count(dev);
if (!count)
@ -189,7 +190,16 @@ static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
goto err;
}
fwnode_property_read_string(child, "label", &led.name);
np = of_node(child);
if (fwnode_property_present(child, "label")) {
fwnode_property_read_string(child, "label", &led.name);
} else {
if (IS_ENABLED(CONFIG_OF) && !led.name && np)
led.name = np->name;
if (!led.name)
return ERR_PTR(-EINVAL);
}
fwnode_property_read_string(child, "linux,default-trigger",
&led.default_trigger);