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authorRussell King <rmk+kernel@arm.linux.org.uk>2014-04-06 15:20:13 -0700
committerBryan Wu <cooloney@gmail.com>2014-05-08 14:28:07 +0800
commitb795e6d94f2193d5e9087f05c445b069a7aa0dcd (patch)
tree7498c2bf069d0122570bae0fe8b8b0f6916f6658 /drivers/leds
parent5f7b03dc2ab5f4ca16e5d6bc3e6dcd2953c6fede (diff)
downloadop-kernel-dev-b795e6d94f2193d5e9087f05c445b069a7aa0dcd.zip
op-kernel-dev-b795e6d94f2193d5e9087f05c445b069a7aa0dcd.tar.gz
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>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-pwm.c62
1 files changed, 23 insertions, 39 deletions
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 203e332..35c1c5f 100644
--- 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) {
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