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path: root/drivers/leds/leds-pwm.c
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Diffstat (limited to 'drivers/leds/leds-pwm.c')
-rw-r--r--drivers/leds/leds-pwm.c39
1 files changed, 16 insertions, 23 deletions
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 1d07e3e83..4783bacb2 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -22,12 +22,10 @@
#include <linux/pwm.h>
#include <linux/leds_pwm.h>
#include <linux/slab.h>
-#include <linux/workqueue.h>
struct led_pwm_data {
struct led_classdev cdev;
struct pwm_device *pwm;
- struct work_struct work;
unsigned int active_low;
unsigned int period;
int duty;
@@ -51,14 +49,6 @@ static void __led_pwm_set(struct led_pwm_data *led_dat)
pwm_enable(led_dat->pwm);
}
-static void led_pwm_work(struct work_struct *work)
-{
- struct led_pwm_data *led_dat =
- container_of(work, struct led_pwm_data, work);
-
- __led_pwm_set(led_dat);
-}
-
static void led_pwm_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
@@ -75,10 +65,14 @@ static void led_pwm_set(struct led_classdev *led_cdev,
led_dat->duty = duty;
- if (led_dat->can_sleep)
- schedule_work(&led_dat->work);
- else
- __led_pwm_set(led_dat);
+ __led_pwm_set(led_dat);
+}
+
+static int led_pwm_set_blocking(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ led_pwm_set(led_cdev, brightness);
+ return 0;
}
static inline size_t sizeof_pwm_leds_priv(int num_leds)
@@ -89,11 +83,8 @@ static inline size_t sizeof_pwm_leds_priv(int num_leds)
static void led_pwm_cleanup(struct led_pwm_priv *priv)
{
- while (priv->num_leds--) {
+ while (priv->num_leds--)
led_classdev_unregister(&priv->leds[priv->num_leds].cdev);
- if (priv->leds[priv->num_leds].can_sleep)
- cancel_work_sync(&priv->leds[priv->num_leds].work);
- }
}
static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
@@ -105,7 +96,6 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
led_data->active_low = led->active_low;
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;
@@ -122,8 +112,10 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
}
led_data->can_sleep = pwm_can_sleep(led_data->pwm);
- if (led_data->can_sleep)
- INIT_WORK(&led_data->work, led_pwm_work);
+ if (!led_data->can_sleep)
+ led_data->cdev.brightness_set = led_pwm_set;
+ else
+ led_data->cdev.brightness_set_blocking = led_pwm_set_blocking;
led_data->period = pwm_get_period(led_data->pwm);
if (!led_data->period && (led->pwm_period_ns > 0))
@@ -132,6 +124,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
ret = led_classdev_register(dev, &led_data->cdev);
if (ret == 0) {
priv->num_leds++;
+ led_pwm_set(&led_data->cdev, led_data->cdev.brightness);
} else {
dev_err(dev, "failed to register PWM led for %s: %d\n",
led->name, ret);
@@ -236,6 +229,6 @@ static struct platform_driver led_pwm_driver = {
module_platform_driver(led_pwm_driver);
MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
-MODULE_DESCRIPTION("PWM LED driver for PXA");
-MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("generic PWM LED driver");
+MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds-pwm");