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leds: pca955x: 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>
Cc: Nate Case <ncase@xes-inc.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
This commit is contained in:
Andrew Lunn 2015-08-20 12:32:35 +02:00 committed by Jacek Anaszewski
parent 7c4b10a2eb
commit c3482b8250
1 changed files with 9 additions and 30 deletions
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39
drivers/leds/leds-pca955x.c
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@ -47,7 +47,6 @@
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
/* LED select registers determine the source that drives LED outputs */
@ -110,8 +109,6 @@ struct pca955x {
struct pca955x_led {
struct pca955x *pca955x;
struct work_struct work;
enum led_brightness brightness;
struct led_classdev led_cdev;
int led_num; /* 0 .. 15 potentially */
char name[32];
@ -193,7 +190,8 @@ static u8 pca955x_read_ls(struct i2c_client *client, int n)
pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n);
}
static void pca955x_led_work(struct work_struct *work)
static int pca955x_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct pca955x_led *pca955x_led;
struct pca955x *pca955x;
@ -201,7 +199,7 @@ static void pca955x_led_work(struct work_struct *work)
int chip_ls; /* which LSx to use (0-3 potentially) */
int ls_led; /* which set of bits within LSx to use (0-3) */
pca955x_led = container_of(work, struct pca955x_led, work);
pca955x_led = container_of(led_cdev, struct pca955x_led, led_cdev);
pca955x = pca955x_led->pca955x;
chip_ls = pca955x_led->led_num / 4;
@ -211,7 +209,7 @@ static void pca955x_led_work(struct work_struct *work)
ls = pca955x_read_ls(pca955x->client, chip_ls);
switch (pca955x_led->brightness) {
switch (value) {
case LED_FULL:
ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_LED_ON);
break;
@ -230,7 +228,7 @@ static void pca955x_led_work(struct work_struct *work)
* just turning off for all other values.
*/
pca955x_write_pwm(pca955x->client, 1,
255 - pca955x_led->brightness);
255 - value);
ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_BLINK1);
break;
}
@ -238,21 +236,8 @@ static void pca955x_led_work(struct work_struct *work)
pca955x_write_ls(pca955x->client, chip_ls, ls);
mutex_unlock(&pca955x->lock);
}
static void pca955x_led_set(struct led_classdev *led_cdev, enum led_brightness value)
{
struct pca955x_led *pca955x;
pca955x = container_of(led_cdev, struct pca955x_led, led_cdev);
pca955x->brightness = value;
/*
* Must use workqueue for the actual I/O since I2C operations
* can sleep.
*/
schedule_work(&pca955x->work);
return 0;
}
static int pca955x_probe(struct i2c_client *client,
@ -328,9 +313,7 @@ static int pca955x_probe(struct i2c_client *client,
}
pca955x_led->led_cdev.name = pca955x_led->name;
pca955x_led->led_cdev.brightness_set = pca955x_led_set;
INIT_WORK(&pca955x_led->work, pca955x_led_work);
pca955x_led->led_cdev.brightness_set_blocking = pca955x_led_set;
err = led_classdev_register(&client->dev,
&pca955x_led->led_cdev);
@ -355,10 +338,8 @@ static int pca955x_probe(struct i2c_client *client,
return 0;
exit:
while (i--) {
while (i--)
led_classdev_unregister(&pca955x->leds[i].led_cdev);
cancel_work_sync(&pca955x->leds[i].work);
}
return err;
}
@ -368,10 +349,8 @@ static int pca955x_remove(struct i2c_client *client)
struct pca955x *pca955x = i2c_get_clientdata(client);
int i;
for (i = 0; i < pca955x->chipdef->bits; i++) {
for (i = 0; i < pca955x->chipdef->bits; i++)
led_classdev_unregister(&pca955x->leds[i].led_cdev);
cancel_work_sync(&pca955x->leds[i].work);
}
return 0;
}