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leds: lt3593: Remove work queue

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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: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
This commit is contained in:
Andrew Lunn 2015-08-20 12:50:05 +02:00 committed by Jacek Anaszewski
parent 8ec108c03e
commit a0011f1be7
1 changed files with 10 additions and 23 deletions
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33
drivers/leds/leds-lt3593.c
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@ -19,7 +19,6 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/leds.h> #include <linux/leds.h>
#include <linux/workqueue.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/slab.h> #include <linux/slab.h>
@ -28,15 +27,14 @@
struct lt3593_led_data { struct lt3593_led_data {
struct led_classdev cdev; struct led_classdev cdev;
unsigned gpio; unsigned gpio;
struct work_struct work;
u8 new_level;
}; };
static void lt3593_led_work(struct work_struct *work) static int lt3593_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{ {
int pulses;
struct lt3593_led_data *led_dat = struct lt3593_led_data *led_dat =
container_of(work, struct lt3593_led_data, work); container_of(led_cdev, struct lt3593_led_data, cdev);
int pulses;
/* /*
* The LT3593 resets its internal current level register to the maximum * The LT3593 resets its internal current level register to the maximum
@ -47,18 +45,18 @@ static void lt3593_led_work(struct work_struct *work)
* applied is to the output driver. * applied is to the output driver.
*/ */
if (led_dat->new_level == 0) { if (value == 0) {
gpio_set_value_cansleep(led_dat->gpio, 0); gpio_set_value_cansleep(led_dat->gpio, 0);
return; return 0;
} }
pulses = 32 - (led_dat->new_level * 32) / 255; pulses = 32 - (value * 32) / 255;
if (pulses == 0) { if (pulses == 0) {
gpio_set_value_cansleep(led_dat->gpio, 0); gpio_set_value_cansleep(led_dat->gpio, 0);
mdelay(1); mdelay(1);
gpio_set_value_cansleep(led_dat->gpio, 1); gpio_set_value_cansleep(led_dat->gpio, 1);
return; return 0;
} }
gpio_set_value_cansleep(led_dat->gpio, 1); gpio_set_value_cansleep(led_dat->gpio, 1);
@ -69,16 +67,8 @@ static void lt3593_led_work(struct work_struct *work)
gpio_set_value_cansleep(led_dat->gpio, 1); gpio_set_value_cansleep(led_dat->gpio, 1);
udelay(1); udelay(1);
} }
}
static void lt3593_led_set(struct led_classdev *led_cdev, return 0;
enum led_brightness value)
{
struct lt3593_led_data *led_dat =
container_of(led_cdev, struct lt3593_led_data, cdev);
led_dat->new_level = value;
schedule_work(&led_dat->work);
} }
static int create_lt3593_led(const struct gpio_led *template, static int create_lt3593_led(const struct gpio_led *template,
@ -97,7 +87,7 @@ static int create_lt3593_led(const struct gpio_led *template,
led_dat->cdev.default_trigger = template->default_trigger; led_dat->cdev.default_trigger = template->default_trigger;
led_dat->gpio = template->gpio; led_dat->gpio = template->gpio;
led_dat->cdev.brightness_set = lt3593_led_set; led_dat->cdev.brightness_set_blocking = lt3593_led_set;
state = (template->default_state == LEDS_GPIO_DEFSTATE_ON); state = (template->default_state == LEDS_GPIO_DEFSTATE_ON);
led_dat->cdev.brightness = state ? LED_FULL : LED_OFF; led_dat->cdev.brightness = state ? LED_FULL : LED_OFF;
@ -111,8 +101,6 @@ static int create_lt3593_led(const struct gpio_led *template,
if (ret < 0) if (ret < 0)
return ret; return ret;
INIT_WORK(&led_dat->work, lt3593_led_work);
ret = led_classdev_register(parent, &led_dat->cdev); ret = led_classdev_register(parent, &led_dat->cdev);
if (ret < 0) if (ret < 0)
return ret; return ret;
@ -129,7 +117,6 @@ static void delete_lt3593_led(struct lt3593_led_data *led)
return; return;
led_classdev_unregister(&led->cdev); led_classdev_unregister(&led->cdev);
cancel_work_sync(&led->work);
} }
static int lt3593_led_probe(struct platform_device *pdev) static int lt3593_led_probe(struct platform_device *pdev)