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leds: led-class: Add led_module_get() helper

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Split out part of of_led_get() into a generic led_module_get() helper
function.

This is a preparation patch for adding a generic (non devicetree specific)
led_get() function.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230120114524.408368-3-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2023-01-20 12:45:15 +01:00 committed by Lee Jones
parent 445110941e
commit fafef58ef4
1 changed files with 24 additions and 18 deletions
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42
drivers/leds/led-class.c
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@ -215,26 +215,9 @@ static int led_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume);
/**
* of_led_get() - request a LED device via the LED framework
* @np: device node to get the LED device from
* @index: the index of the LED
*
* Returns the LED device parsed from the phandle specified in the "leds"
* property of a device tree node or a negative error-code on failure.
*/
struct led_classdev *of_led_get(struct device_node *np, int index)
static struct led_classdev *led_module_get(struct device *led_dev)
{
struct device *led_dev;
struct led_classdev *led_cdev;
struct device_node *led_node;
led_node = of_parse_phandle(np, "leds", index);
if (!led_node)
return ERR_PTR(-ENOENT);
led_dev = class_find_device_by_of_node(leds_class, led_node);
of_node_put(led_node);
if (!led_dev)
return ERR_PTR(-EPROBE_DEFER);
@ -248,6 +231,29 @@ struct led_classdev *of_led_get(struct device_node *np, int index)
return led_cdev;
}
/**
* of_led_get() - request a LED device via the LED framework
* @np: device node to get the LED device from
* @index: the index of the LED
*
* Returns the LED device parsed from the phandle specified in the "leds"
* property of a device tree node or a negative error-code on failure.
*/
struct led_classdev *of_led_get(struct device_node *np, int index)
{
struct device *led_dev;
struct device_node *led_node;
led_node = of_parse_phandle(np, "leds", index);
if (!led_node)
return ERR_PTR(-ENOENT);
led_dev = class_find_device_by_of_node(leds_class, led_node);
of_node_put(led_node);
return led_module_get(led_dev);
}
EXPORT_SYMBOL_GPL(of_led_get);
/**