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leds: pwm: Simplify with resource-managed devm_led_classdev_register()

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Simplify the exit path with resource-managed version of registering LED
class device.  The code should be functionally the same, except that on
device removal the led_pwm_priv->num_leds is not decremented to zero
(which should not have any effect as device is going away).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
This commit is contained in:
Krzysztof Kozlowski 2018-12-07 13:32:51 +01:00 committed by Jacek Anaszewski
parent b086592e5d
commit e5a0436dd0
1 changed files with 2 additions and 20 deletions
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22
drivers/leds/leds-pwm.c
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@ -74,12 +74,6 @@ static inline size_t sizeof_pwm_leds_priv(int num_leds)
(sizeof(struct led_pwm_data) * num_leds);
}
static void led_pwm_cleanup(struct led_pwm_priv *priv)
{
while (priv->num_leds--)
led_classdev_unregister(&priv->leds[priv->num_leds].cdev);
}
static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
struct led_pwm *led, struct device_node *child)
{
@ -120,7 +114,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
if (!led_data->period && (led->pwm_period_ns > 0))
led_data->period = led->pwm_period_ns;
ret = led_classdev_register(dev, &led_data->cdev);
ret = devm_led_classdev_register(dev, &led_data->cdev);
if (ret == 0) {
priv->num_leds++;
led_pwm_set(&led_data->cdev, led_data->cdev.brightness);
@ -191,25 +185,14 @@ static int led_pwm_probe(struct platform_device *pdev)
ret = led_pwm_create_of(&pdev->dev, priv);
}
if (ret) {
led_pwm_cleanup(priv);
if (ret)
return ret;
}
platform_set_drvdata(pdev, priv);
return 0;
}
static int led_pwm_remove(struct platform_device *pdev)
{
struct led_pwm_priv *priv = platform_get_drvdata(pdev);
led_pwm_cleanup(priv);
return 0;
}
static const struct of_device_id of_pwm_leds_match[] = {
{ .compatible = "pwm-leds", },
{},
@ -218,7 +201,6 @@ MODULE_DEVICE_TABLE(of, of_pwm_leds_match);
static struct platform_driver led_pwm_driver = {
.probe = led_pwm_probe,
.remove = led_pwm_remove,
.driver = {
.name = "leds_pwm",
.of_match_table = of_pwm_leds_match,