diff options
Diffstat (limited to 'drivers/leds/leds-blinkm.c')
| -rw-r--r-- | drivers/leds/leds-blinkm.c | 87 |
1 files changed, 17 insertions, 70 deletions
diff --git a/drivers/leds/leds-blinkm.c b/drivers/leds/leds-blinkm.c index d0452b0..617fe97 100644 --- a/drivers/leds/leds-blinkm.c +++ b/drivers/leds/leds-blinkm.c @@ -39,16 +39,9 @@ struct blinkm_led { struct i2c_client *i2c_client; struct led_classdev led_cdev; int id; - atomic_t active; -}; - -struct blinkm_work { - struct blinkm_led *blinkm_led; - struct work_struct work; }; #define cdev_to_blmled(c) container_of(c, struct blinkm_led, led_cdev) -#define work_to_blmwork(c) container_of(c, struct blinkm_work, work) struct blinkm_data { struct i2c_client *i2c_client; @@ -439,65 +432,30 @@ static int blinkm_transfer_hw(struct i2c_client *client, int cmd) return 0; } -static void led_work(struct work_struct *work) -{ - int ret; - struct blinkm_led *led; - struct blinkm_data *data; - struct blinkm_work *blm_work = work_to_blmwork(work); - - led = blm_work->blinkm_led; - data = i2c_get_clientdata(led->i2c_client); - ret = blinkm_transfer_hw(led->i2c_client, BLM_GO_RGB); - atomic_dec(&led->active); - dev_dbg(&led->i2c_client->dev, - "# DONE # next_red = %d, next_green = %d," - " next_blue = %d, active = %d\n", - data->next_red, data->next_green, - data->next_blue, atomic_read(&led->active)); - kfree(blm_work); -} - static int blinkm_led_common_set(struct led_classdev *led_cdev, enum led_brightness value, int color) { /* led_brightness is 0, 127 or 255 - we just use it here as-is */ struct blinkm_led *led = cdev_to_blmled(led_cdev); struct blinkm_data *data = i2c_get_clientdata(led->i2c_client); - struct blinkm_work *bl_work; switch (color) { case RED: /* bail out if there's no change */ if (data->next_red == (u8) value) return 0; - /* we assume a quite fast sequence here ([off]->on->off) - * think of network led trigger - we cannot blink that fast, so - * in case we already have a off->on->off transition queued up, - * we refuse to queue up more. - * Revisit: fast-changing brightness. */ - if (atomic_read(&led->active) > 1) - return 0; data->next_red = (u8) value; break; case GREEN: /* bail out if there's no change */ if (data->next_green == (u8) value) return 0; - /* we assume a quite fast sequence here ([off]->on->off) - * Revisit: fast-changing brightness. */ - if (atomic_read(&led->active) > 1) - return 0; data->next_green = (u8) value; break; case BLUE: /* bail out if there's no change */ if (data->next_blue == (u8) value) return 0; - /* we assume a quite fast sequence here ([off]->on->off) - * Revisit: fast-changing brightness. */ - if (atomic_read(&led->active) > 1) - return 0; data->next_blue = (u8) value; break; @@ -506,42 +464,31 @@ static int blinkm_led_common_set(struct led_classdev *led_cdev, return -EINVAL; } - bl_work = kzalloc(sizeof(*bl_work), GFP_ATOMIC); - if (!bl_work) - return -ENOMEM; - - atomic_inc(&led->active); + blinkm_transfer_hw(led->i2c_client, BLM_GO_RGB); dev_dbg(&led->i2c_client->dev, - "#TO_SCHED# next_red = %d, next_green = %d," - " next_blue = %d, active = %d\n", + "# DONE # next_red = %d, next_green = %d," + " next_blue = %d\n", data->next_red, data->next_green, - data->next_blue, atomic_read(&led->active)); - - /* a fresh work _item_ for each change */ - bl_work->blinkm_led = led; - INIT_WORK(&bl_work->work, led_work); - /* queue work in own queue for easy sync on exit*/ - schedule_work(&bl_work->work); - + data->next_blue); return 0; } -static void blinkm_led_red_set(struct led_classdev *led_cdev, +static int blinkm_led_red_set(struct led_classdev *led_cdev, enum led_brightness value) { - blinkm_led_common_set(led_cdev, value, RED); + return blinkm_led_common_set(led_cdev, value, RED); } -static void blinkm_led_green_set(struct led_classdev *led_cdev, +static int blinkm_led_green_set(struct led_classdev *led_cdev, enum led_brightness value) { - blinkm_led_common_set(led_cdev, value, GREEN); + return blinkm_led_common_set(led_cdev, value, GREEN); } -static void blinkm_led_blue_set(struct led_classdev *led_cdev, +static int blinkm_led_blue_set(struct led_classdev *led_cdev, enum led_brightness value) { - blinkm_led_common_set(led_cdev, value, BLUE); + return blinkm_led_common_set(led_cdev, value, BLUE); } static void blinkm_init_hw(struct i2c_client *client) @@ -669,7 +616,6 @@ static int blinkm_probe(struct i2c_client *client, led[i]->id = i; led[i]->led_cdev.max_brightness = 255; led[i]->led_cdev.flags = LED_CORE_SUSPENDRESUME; - atomic_set(&led[i]->active, 0); switch (i) { case RED: snprintf(blinkm_led_name, sizeof(blinkm_led_name), @@ -677,7 +623,8 @@ static int blinkm_probe(struct i2c_client *client, client->adapter->nr, client->addr); led[i]->led_cdev.name = blinkm_led_name; - led[i]->led_cdev.brightness_set = blinkm_led_red_set; + led[i]->led_cdev.brightness_set_blocking = + blinkm_led_red_set; err = led_classdev_register(&client->dev, &led[i]->led_cdev); if (err < 0) { @@ -693,7 +640,8 @@ static int blinkm_probe(struct i2c_client *client, client->adapter->nr, client->addr); led[i]->led_cdev.name = blinkm_led_name; - led[i]->led_cdev.brightness_set = blinkm_led_green_set; + led[i]->led_cdev.brightness_set_blocking = + blinkm_led_green_set; err = led_classdev_register(&client->dev, &led[i]->led_cdev); if (err < 0) { @@ -709,7 +657,8 @@ static int blinkm_probe(struct i2c_client *client, client->adapter->nr, client->addr); led[i]->led_cdev.name = blinkm_led_name; - led[i]->led_cdev.brightness_set = blinkm_led_blue_set; + led[i]->led_cdev.brightness_set_blocking = + blinkm_led_blue_set; err = led_classdev_register(&client->dev, &led[i]->led_cdev); if (err < 0) { @@ -746,10 +695,8 @@ static int blinkm_remove(struct i2c_client *client) int i; /* make sure no workqueue entries are pending */ - for (i = 0; i < 3; i++) { - flush_scheduled_work(); + for (i = 0; i < 3; i++) led_classdev_unregister(&data->blinkm_leds[i].led_cdev); - } /* reset rgb */ data->next_red = 0x00; |
