leds: leds-pwm: convert OF parsing code to use led_pwm_add()

Convert the OF parsing code to use the common PWM LED registration code,
which means we have a consistent method, and single point where the
registration happens for both paths.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 203e332..35c1c5f 100644 (file)
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -93,7 +93,7 @@ static void led_pwm_cleanup(struct led_pwm_priv *priv)
 }
 
 static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
-                      struct led_pwm *led)
+                      struct led_pwm *led, struct device_node *child)
 {
        struct led_pwm_data *led_data = &priv->leds[priv->num_leds];
        int ret;
@@ -107,7 +107,10 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
        led_data->cdev.max_brightness = led->max_brightness;
        led_data->cdev.flags = LED_CORE_SUSPENDRESUME;
 
-       led_data->pwm = devm_pwm_get(dev, led->name);
+       if (child)
+               led_data->pwm = devm_of_pwm_get(dev, child, NULL);
+       else
+               led_data->pwm = devm_pwm_get(dev, led->name);
        if (IS_ERR(led_data->pwm)) {
                ret = PTR_ERR(led_data->pwm);
                dev_err(dev, "unable to request PWM for %s: %d\n",
@@ -115,6 +118,9 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
                return ret;
        }
 
+       if (child)
+               led_data->period = pwm_get_period(led_data->pwm);
+
        led_data->can_sleep = pwm_can_sleep(led_data->pwm);
        if (led_data->can_sleep)
                INIT_WORK(&led_data->work, led_pwm_work);
@@ -130,53 +136,30 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
        return ret;
 }
 
-static int led_pwm_create_of(struct platform_device *pdev,
-                            struct led_pwm_priv *priv)
+static int led_pwm_create_of(struct device *dev, struct led_pwm_priv *priv)
 {
        struct device_node *child;
-       int ret;
-
-       for_each_child_of_node(pdev->dev.of_node, child) {
-               struct led_pwm_data *led_dat = &priv->leds[priv->num_leds];
+       struct led_pwm led;
+       int ret = 0;
 
-               led_dat->cdev.name = of_get_property(child, "label",
-                                                    NULL) ? : child->name;
+       memset(&led, 0, sizeof(led));
 
-               led_dat->pwm = devm_of_pwm_get(&pdev->dev, child, NULL);
-               if (IS_ERR(led_dat->pwm)) {
-                       dev_err(&pdev->dev, "unable to request PWM for %s\n",
-                               led_dat->cdev.name);
-                       ret = PTR_ERR(led_dat->pwm);
-                       goto err;
-               }
-               /* Get the period from PWM core when n*/
-               led_dat->period = pwm_get_period(led_dat->pwm);
+       for_each_child_of_node(dev->of_node, child) {
+               led.name = of_get_property(child, "label", NULL) ? :
+                          child->name;
 
-               led_dat->cdev.default_trigger = of_get_property(child,
+               led.default_trigger = of_get_property(child,
                                                "linux,default-trigger", NULL);
                of_property_read_u32(child, "max-brightness",
-                                    &led_dat->cdev.max_brightness);
-
-               led_dat->cdev.brightness_set = led_pwm_set;
-               led_dat->cdev.brightness = LED_OFF;
-               led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
-
-               led_dat->can_sleep = pwm_can_sleep(led_dat->pwm);
-               if (led_dat->can_sleep)
-                       INIT_WORK(&led_dat->work, led_pwm_work);
+                                    &led.max_brightness);
 
-               ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
-               if (ret < 0) {
-                       dev_err(&pdev->dev, "failed to register for %s\n",
-                               led_dat->cdev.name);
+               ret = led_pwm_add(dev, priv, &led, child);
+               if (ret) {
                        of_node_put(child);
-                       goto err;
+                       break;
                }
-               priv->num_leds++;
        }
 
-       return 0;
-err:
        return ret;
 }
 
@@ -202,12 +185,13 @@ static int led_pwm_probe(struct platform_device *pdev)
 
        if (pdata) {
                for (i = 0; i < count; i++) {
-                       ret = led_pwm_add(&pdev->dev, priv, &pdata->leds[i]);
+                       ret = led_pwm_add(&pdev->dev, priv, &pdata->leds[i],
+                                         NULL);
                        if (ret)
                                break;
                }
        } else {
-               ret = led_pwm_create_of(pdev, priv);
+               ret = led_pwm_create_of(&pdev->dev, priv);
        }
 
        if (ret) {