diff options
author | Andrew Lunn <andrew@lunn.ch> | 2015-08-20 12:38:44 +0200 |
---|---|---|
committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-01-04 09:57:34 +0100 |
commit | 5029a2e336e70035ed1d6f491f3348164cc36c3e (patch) | |
tree | 34aea107382c1d83600a04ea9ee1ee20e2687bc1 /drivers/leds | |
parent | c3482b825022dbeefabff4dd917cb68069e6fd90 (diff) | |
download | op-kernel-dev-5029a2e336e70035ed1d6f491f3348164cc36c3e.zip op-kernel-dev-5029a2e336e70035ed1d6f491f3348164cc36c3e.tar.gz |
leds: pca963x: Remove work queue
Now the core implements the work queue, remove it from the drivers,
and switch to using brightness_set_blocking op.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Cc: Ricardo Ribalda <ricardo.ribalda@gmail.com>
Diffstat (limited to 'drivers/leds')
-rw-r--r-- | drivers/leds/leds-pca963x.c | 80 |
1 files changed, 23 insertions, 57 deletions
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c index 41f269f..407eba1 100644 --- a/drivers/leds/leds-pca963x.c +++ b/drivers/leds/leds-pca963x.c @@ -32,7 +32,6 @@ #include <linux/leds.h> #include <linux/err.h> #include <linux/i2c.h> -#include <linux/workqueue.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/platform_data/leds-pca963x.h> @@ -96,11 +95,6 @@ static const struct i2c_device_id pca963x_id[] = { }; MODULE_DEVICE_TABLE(i2c, pca963x_id); -enum pca963x_cmd { - BRIGHTNESS_SET, - BLINK_SET, -}; - struct pca963x_led; struct pca963x { @@ -112,47 +106,52 @@ struct pca963x { struct pca963x_led { struct pca963x *chip; - struct work_struct work; - enum led_brightness brightness; struct led_classdev led_cdev; int led_num; /* 0 .. 15 potentially */ - enum pca963x_cmd cmd; char name[32]; u8 gdc; u8 gfrq; }; -static void pca963x_brightness_work(struct pca963x_led *pca963x) +static int pca963x_brightness(struct pca963x_led *pca963x, + enum led_brightness brightness) { u8 ledout_addr = pca963x->chip->chipdef->ledout_base + (pca963x->led_num / 4); u8 ledout; int shift = 2 * (pca963x->led_num % 4); u8 mask = 0x3 << shift; + int ret; mutex_lock(&pca963x->chip->mutex); ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr); - switch (pca963x->brightness) { + switch (brightness) { case LED_FULL: - i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr, + ret = i2c_smbus_write_byte_data(pca963x->chip->client, + ledout_addr, (ledout & ~mask) | (PCA963X_LED_ON << shift)); break; case LED_OFF: - i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr, - ledout & ~mask); + ret = i2c_smbus_write_byte_data(pca963x->chip->client, + ledout_addr, ledout & ~mask); break; default: - i2c_smbus_write_byte_data(pca963x->chip->client, + ret = i2c_smbus_write_byte_data(pca963x->chip->client, PCA963X_PWM_BASE + pca963x->led_num, - pca963x->brightness); - i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr, + brightness); + if (ret < 0) + goto unlock; + ret = i2c_smbus_write_byte_data(pca963x->chip->client, + ledout_addr, (ledout & ~mask) | (PCA963X_LED_PWM << shift)); break; } +unlock: mutex_unlock(&pca963x->chip->mutex); + return ret; } -static void pca963x_blink_work(struct pca963x_led *pca963x) +static void pca963x_blink(struct pca963x_led *pca963x) { u8 ledout_addr = pca963x->chip->chipdef->ledout_base + (pca963x->led_num / 4); @@ -180,36 +179,14 @@ static void pca963x_blink_work(struct pca963x_led *pca963x) mutex_unlock(&pca963x->chip->mutex); } -static void pca963x_work(struct work_struct *work) -{ - struct pca963x_led *pca963x = container_of(work, - struct pca963x_led, work); - - switch (pca963x->cmd) { - case BRIGHTNESS_SET: - pca963x_brightness_work(pca963x); - break; - case BLINK_SET: - pca963x_blink_work(pca963x); - break; - } -} - -static void pca963x_led_set(struct led_classdev *led_cdev, +static int pca963x_led_set(struct led_classdev *led_cdev, enum led_brightness value) { struct pca963x_led *pca963x; pca963x = container_of(led_cdev, struct pca963x_led, led_cdev); - pca963x->cmd = BRIGHTNESS_SET; - pca963x->brightness = value; - - /* - * Must use workqueue for the actual I/O since I2C operations - * can sleep. - */ - schedule_work(&pca963x->work); + return pca963x_brightness(pca963x, value); } static int pca963x_blink_set(struct led_classdev *led_cdev, @@ -254,15 +231,10 @@ static int pca963x_blink_set(struct led_classdev *led_cdev, */ gfrq = (period * 24 / 1000) - 1; - pca963x->cmd = BLINK_SET; pca963x->gdc = gdc; pca963x->gfrq = gfrq; - /* - * Must use workqueue for the actual I/O since I2C operations - * can sleep. - */ - schedule_work(&pca963x->work); + pca963x_blink(pca963x); *delay_on = time_on; *delay_off = time_off; @@ -409,13 +381,11 @@ static int pca963x_probe(struct i2c_client *client, client->addr, i); pca963x[i].led_cdev.name = pca963x[i].name; - pca963x[i].led_cdev.brightness_set = pca963x_led_set; + pca963x[i].led_cdev.brightness_set_blocking = pca963x_led_set; if (pdata && pdata->blink_type == PCA963X_HW_BLINK) pca963x[i].led_cdev.blink_set = pca963x_blink_set; - INIT_WORK(&pca963x[i].work, pca963x_work); - err = led_classdev_register(&client->dev, &pca963x[i].led_cdev); if (err < 0) goto exit; @@ -435,10 +405,8 @@ static int pca963x_probe(struct i2c_client *client, return 0; exit: - while (i--) { + while (i--) led_classdev_unregister(&pca963x[i].led_cdev); - cancel_work_sync(&pca963x[i].work); - } return err; } @@ -448,10 +416,8 @@ static int pca963x_remove(struct i2c_client *client) struct pca963x *pca963x = i2c_get_clientdata(client); int i; - for (i = 0; i < pca963x->chipdef->n_leds; i++) { + for (i = 0; i < pca963x->chipdef->n_leds; i++) led_classdev_unregister(&pca963x->leds[i].led_cdev); - cancel_work_sync(&pca963x->leds[i].work); - } return 0; } |