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path: root/drivers/leds/leds-wm8350.c
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Diffstat (limited to 'drivers/leds/leds-wm8350.c')
-rw-r--r--drivers/leds/leds-wm8350.c64
1 files changed, 25 insertions, 39 deletions
diff --git a/drivers/leds/leds-wm8350.c b/drivers/leds/leds-wm8350.c
index 0d1218356..e1e4e9d0b 100644
--- a/drivers/leds/leds-wm8350.c
+++ b/drivers/leds/leds-wm8350.c
@@ -89,40 +89,42 @@ static const int isink_cur[] = {
#define to_wm8350_led(led_cdev) \
container_of(led_cdev, struct wm8350_led, cdev)
-static void wm8350_led_enable(struct wm8350_led *led)
+static int wm8350_led_enable(struct wm8350_led *led)
{
- int ret;
+ int ret = 0;
if (led->enabled)
- return;
+ return ret;
ret = regulator_enable(led->isink);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to enable ISINK: %d\n", ret);
- return;
+ return ret;
}
ret = regulator_enable(led->dcdc);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to enable DCDC: %d\n", ret);
regulator_disable(led->isink);
- return;
+ return ret;
}
led->enabled = 1;
+
+ return ret;
}
-static void wm8350_led_disable(struct wm8350_led *led)
+static int wm8350_led_disable(struct wm8350_led *led)
{
- int ret;
+ int ret = 0;
if (!led->enabled)
- return;
+ return ret;
ret = regulator_disable(led->dcdc);
if (ret != 0) {
dev_err(led->cdev.dev, "Failed to disable DCDC: %d\n", ret);
- return;
+ return ret;
}
ret = regulator_disable(led->isink);
@@ -132,27 +134,29 @@ static void wm8350_led_disable(struct wm8350_led *led)
if (ret != 0)
dev_err(led->cdev.dev, "Failed to reenable DCDC: %d\n",
ret);
- return;
+ return ret;
}
led->enabled = 0;
+
+ return ret;
}
-static void led_work(struct work_struct *work)
+static int wm8350_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
{
- struct wm8350_led *led = container_of(work, struct wm8350_led, work);
+ struct wm8350_led *led = to_wm8350_led(led_cdev);
+ unsigned long flags;
int ret;
int uA;
- unsigned long flags;
- mutex_lock(&led->mutex);
+ led->value = value;
spin_lock_irqsave(&led->value_lock, flags);
if (led->value == LED_OFF) {
spin_unlock_irqrestore(&led->value_lock, flags);
- wm8350_led_disable(led);
- goto out;
+ return wm8350_led_disable(led);
}
/* This scales linearly into the index of valid current
@@ -166,36 +170,21 @@ static void led_work(struct work_struct *work)
ret = regulator_set_current_limit(led->isink, isink_cur[uA],
isink_cur[uA]);
- if (ret != 0)
+ if (ret != 0) {
dev_err(led->cdev.dev, "Failed to set %duA: %d\n",
isink_cur[uA], ret);
+ return ret;
+ }
- wm8350_led_enable(led);
-
-out:
- mutex_unlock(&led->mutex);
-}
-
-static void wm8350_led_set(struct led_classdev *led_cdev,
- enum led_brightness value)
-{
- struct wm8350_led *led = to_wm8350_led(led_cdev);
- unsigned long flags;
-
- spin_lock_irqsave(&led->value_lock, flags);
- led->value = value;
- schedule_work(&led->work);
- spin_unlock_irqrestore(&led->value_lock, flags);
+ return wm8350_led_enable(led);
}
static void wm8350_led_shutdown(struct platform_device *pdev)
{
struct wm8350_led *led = platform_get_drvdata(pdev);
- mutex_lock(&led->mutex);
led->value = LED_OFF;
wm8350_led_disable(led);
- mutex_unlock(&led->mutex);
}
static int wm8350_led_probe(struct platform_device *pdev)
@@ -232,7 +221,7 @@ static int wm8350_led_probe(struct platform_device *pdev)
if (led == NULL)
return -ENOMEM;
- led->cdev.brightness_set = wm8350_led_set;
+ led->cdev.brightness_set_blocking = wm8350_led_set;
led->cdev.default_trigger = pdata->default_trigger;
led->cdev.name = pdata->name;
led->cdev.flags |= LED_CORE_SUSPENDRESUME;
@@ -251,8 +240,6 @@ static int wm8350_led_probe(struct platform_device *pdev)
pdata->max_uA);
spin_lock_init(&led->value_lock);
- mutex_init(&led->mutex);
- INIT_WORK(&led->work, led_work);
led->value = LED_OFF;
platform_set_drvdata(pdev, led);
@@ -264,7 +251,6 @@ static int wm8350_led_remove(struct platform_device *pdev)
struct wm8350_led *led = platform_get_drvdata(pdev);
led_classdev_unregister(&led->cdev);
- flush_work(&led->work);
wm8350_led_disable(led);
return 0;
}