leds: led-class: Add led_module_get() helper

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

diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 7391d2c..743d97b 100644 (file)
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -215,6 +215,23 @@ static int led_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume);
 
+static struct led_classdev *led_module_get(struct device *led_dev)
+{
+       struct led_classdev *led_cdev;
+
+       if (!led_dev)
+               return ERR_PTR(-EPROBE_DEFER);
+
+       led_cdev = dev_get_drvdata(led_dev);
+
+       if (!try_module_get(led_cdev->dev->parent->driver->owner)) {
+               put_device(led_cdev->dev);
+               return ERR_PTR(-ENODEV);
+       }
+
+       return led_cdev;
+}
+
 /**
  * of_led_get() - request a LED device via the LED framework
  * @np: device node to get the LED device from
@@ -226,7 +243,6 @@ static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume);
 struct led_classdev *of_led_get(struct device_node *np, int index)
 {
        struct device *led_dev;
-       struct led_classdev *led_cdev;
        struct device_node *led_node;
 
        led_node = of_parse_phandle(np, "leds", index);
@@ -236,17 +252,7 @@ struct led_classdev *of_led_get(struct device_node *np, int index)
        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);
-
-       led_cdev = dev_get_drvdata(led_dev);
-
-       if (!try_module_get(led_cdev->dev->parent->driver->owner)) {
-               put_device(led_cdev->dev);
-               return ERR_PTR(-ENODEV);
-       }
-
-       return led_cdev;
+       return led_module_get(led_dev);
 }
 EXPORT_SYMBOL_GPL(of_led_get);