Input: qt2160 - switch to using brightness_set_blocking()

Now that LEDs core allows "blocking" flavor of "set brightness" method we
can use it and get rid of private work items.

Reviewed-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/keyboard/qt2160.c b/drivers/input/keyboard/qt2160.c
index 43b8648..d466bc0 100644 (file)
--- a/drivers/input/keyboard/qt2160.c
+++ b/drivers/input/keyboard/qt2160.c
@@ -58,10 +58,9 @@ static unsigned char qt2160_key2code[] = {
 struct qt2160_led {
        struct qt2160_data *qt2160;
        struct led_classdev cdev;
-       struct work_struct work;
        char name[32];
        int id;
-       enum led_brightness new_brightness;
+       enum led_brightness brightness;
 };
 #endif
 
@@ -74,7 +73,6 @@ struct qt2160_data {
        u16 key_matrix;
 #ifdef CONFIG_LEDS_CLASS
        struct qt2160_led leds[QT2160_NUM_LEDS_X];
-       struct mutex led_lock;
 #endif
 };
 
@@ -83,46 +81,39 @@ static int qt2160_write(struct i2c_client *client, u8 reg, u8 data);
 
 #ifdef CONFIG_LEDS_CLASS
 
-static void qt2160_led_work(struct work_struct *work)
+static int qt2160_led_set(struct led_classdev *cdev,
+                         enum led_brightness value)
 {
-       struct qt2160_led *led = container_of(work, struct qt2160_led, work);
+       struct qt2160_led *led = container_of(cdev, struct qt2160_led, cdev);
        struct qt2160_data *qt2160 = led->qt2160;
        struct i2c_client *client = qt2160->client;
-       int value = led->new_brightness;
        u32 drive, pwmen;
 
-       mutex_lock(&qt2160->led_lock);
-
-       drive = qt2160_read(client, QT2160_CMD_DRIVE_X);
-       pwmen = qt2160_read(client, QT2160_CMD_PWMEN_X);
-       if (value != LED_OFF) {
-               drive |= (1 << led->id);
-               pwmen |= (1 << led->id);
-
-       } else {
-               drive &= ~(1 << led->id);
-               pwmen &= ~(1 << led->id);
-       }
-       qt2160_write(client, QT2160_CMD_DRIVE_X, drive);
-       qt2160_write(client, QT2160_CMD_PWMEN_X, pwmen);
+       if (value != led->brightness) {
+               drive = qt2160_read(client, QT2160_CMD_DRIVE_X);
+               pwmen = qt2160_read(client, QT2160_CMD_PWMEN_X);
+               if (value != LED_OFF) {
+                       drive |= BIT(led->id);
+                       pwmen |= BIT(led->id);
 
-       /*
-        * Changing this register will change the brightness
-        * of every LED in the qt2160. It's a HW limitation.
-        */
-       if (value != LED_OFF)
-               qt2160_write(client, QT2160_CMD_PWM_DUTY, value);
+               } else {
+                       drive &= ~BIT(led->id);
+                       pwmen &= ~BIT(led->id);
+               }
+               qt2160_write(client, QT2160_CMD_DRIVE_X, drive);
+               qt2160_write(client, QT2160_CMD_PWMEN_X, pwmen);
 
-       mutex_unlock(&qt2160->led_lock);
-}
+               /*
+                * Changing this register will change the brightness
+                * of every LED in the qt2160. It's a HW limitation.
+                */
+               if (value != LED_OFF)
+                       qt2160_write(client, QT2160_CMD_PWM_DUTY, value);
 
-static void qt2160_led_set(struct led_classdev *cdev,
-                          enum led_brightness value)
-{
-       struct qt2160_led *led = container_of(cdev, struct qt2160_led, cdev);
+               led->brightness = value;
+       }
 
-       led->new_brightness = value;
-       schedule_work(&led->work);
+       return 0;
 }
 
 #endif /* CONFIG_LEDS_CLASS */
@@ -293,20 +284,16 @@ static int qt2160_register_leds(struct qt2160_data *qt2160)
        int ret;
        int i;
 
-       mutex_init(&qt2160->led_lock);
-
        for (i = 0; i < QT2160_NUM_LEDS_X; i++) {
                struct qt2160_led *led = &qt2160->leds[i];
 
                snprintf(led->name, sizeof(led->name), "qt2160:x%d", i);
                led->cdev.name = led->name;
-               led->cdev.brightness_set = qt2160_led_set;
+               led->cdev.brightness_set_blocking = qt2160_led_set;
                led->cdev.brightness = LED_OFF;
                led->id = i;
                led->qt2160 = qt2160;
 
-               INIT_WORK(&led->work, qt2160_led_work);
-
                ret = led_classdev_register(&client->dev, &led->cdev);
                if (ret < 0)
                        return ret;
@@ -324,10 +311,8 @@ static void qt2160_unregister_leds(struct qt2160_data *qt2160)
 {
        int i;
 
-       for (i = 0; i < QT2160_NUM_LEDS_X; i++) {
+       for (i = 0; i < QT2160_NUM_LEDS_X; i++)
                led_classdev_unregister(&qt2160->leds[i].cdev);
-               cancel_work_sync(&qt2160->leds[i].work);
-       }
 }
 
 #else