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leds: leds-pwm: provide a common function to setup a single led-pwm device 

Provide a common function to setup a single led-pwm device, replacing
the platform data initialisation path with this function.  This allows
us to have a common method of creating these devices in a consistent
manner, which then allows us to place the probe failure cleanup in one
place.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This commit is contained in:
Russell King 2014-04-06 15:20:08 -07:00 committed by Bryan Wu
parent 2ce112f1e7
commit 5f7b03dc2a
1 changed files with 46 additions and 39 deletions
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85
drivers/leds/leds-pwm.c
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@ -92,6 +92,44 @@ 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_data *led_data = &priv->leds[priv->num_leds];
int ret;
led_data->active_low = led->active_low;
led_data->period = led->pwm_period_ns;
led_data->cdev.name = led->name;
led_data->cdev.default_trigger = led->default_trigger;
led_data->cdev.brightness_set = led_pwm_set;
led_data->cdev.brightness = LED_OFF;
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 (IS_ERR(led_data->pwm)) {
ret = PTR_ERR(led_data->pwm);
dev_err(dev, "unable to request PWM for %s: %d\n",
led->name, ret);
return ret;
}
led_data->can_sleep = pwm_can_sleep(led_data->pwm);
if (led_data->can_sleep)
INIT_WORK(&led_data->work, led_pwm_work);
ret = led_classdev_register(dev, &led_data->cdev);
if (ret == 0) {
priv->num_leds++;
} else {
dev_err(dev, "failed to register PWM led for %s: %d\n",
led->name, ret);
}
return ret;
}
static int led_pwm_create_of(struct platform_device *pdev,
struct led_pwm_priv *priv)
{
@ -139,8 +177,6 @@ static int led_pwm_create_of(struct platform_device *pdev,
return 0;
err:
led_pwm_cleanup(priv);
return ret;
}
@ -166,51 +202,22 @@ static int led_pwm_probe(struct platform_device *pdev)
if (pdata) {
for (i = 0; i < count; i++) {
struct led_pwm *cur_led = &pdata->leds[i];
struct led_pwm_data *led_dat = &priv->leds[i];
led_dat->pwm = devm_pwm_get(&pdev->dev, cur_led->name);
if (IS_ERR(led_dat->pwm)) {
ret = PTR_ERR(led_dat->pwm);
dev_err(&pdev->dev,
"unable to request PWM for %s\n",
cur_led->name);
goto err;
}
led_dat->cdev.name = cur_led->name;
led_dat->cdev.default_trigger = cur_led->default_trigger;
led_dat->active_low = cur_led->active_low;
led_dat->period = cur_led->pwm_period_ns;
led_dat->cdev.brightness_set = led_pwm_set;
led_dat->cdev.brightness = LED_OFF;
led_dat->cdev.max_brightness = cur_led->max_brightness;
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);
ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
if (ret < 0)
goto err;
ret = led_pwm_add(&pdev->dev, priv, &pdata->leds[i]);
if (ret)
break;
}
priv->num_leds = count;
} else {
ret = led_pwm_create_of(pdev, priv);
if (ret)
return ret;
}
if (ret) {
led_pwm_cleanup(priv);
return ret;
}
platform_set_drvdata(pdev, priv);
return 0;
err:
priv->num_leds = i;
led_pwm_cleanup(priv);
return ret;
}
static int led_pwm_remove(struct platform_device *pdev)