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leds: gpio: 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: Jacek Anaszewski <j.anaszewski@samsung.com>
Cc: Raphael Assenat <raph@8d.com>
hifive-unleashed-5.1
Jacek Anaszewski 2015-08-20 15:52:32 +02:00
parent 0dd756f767
commit d5b8a09000
1 changed files with 22 additions and 40 deletions
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62
drivers/leds/leds-gpio.c
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@ -20,32 +20,16 @@
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
struct gpio_led_data {
struct led_classdev cdev;
struct gpio_desc *gpiod;
struct work_struct work;
u8 new_level;
u8 can_sleep;
u8 blinking;
int (*platform_gpio_blink_set)(struct gpio_desc *desc, int state,
unsigned long *delay_on, unsigned long *delay_off);
};
static void gpio_led_work(struct work_struct *work)
{
struct gpio_led_data *led_dat =
container_of(work, struct gpio_led_data, work);
if (led_dat->blinking) {
led_dat->platform_gpio_blink_set(led_dat->gpiod,
led_dat->new_level, NULL, NULL);
led_dat->blinking = 0;
} else
gpiod_set_value_cansleep(led_dat->gpiod, led_dat->new_level);
}
static void gpio_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
@ -58,23 +42,25 @@ static void gpio_led_set(struct led_classdev *led_cdev,
else
level = 1;
/* Setting GPIOs with I2C/etc requires a task context, and we don't
* seem to have a reliable way to know if we're already in one; so
* let's just assume the worst.
*/
if (led_dat->can_sleep) {
led_dat->new_level = level;
schedule_work(&led_dat->work);
if (led_dat->blinking) {
led_dat->platform_gpio_blink_set(led_dat->gpiod, level,
NULL, NULL);
led_dat->blinking = 0;
} else {
if (led_dat->blinking) {
led_dat->platform_gpio_blink_set(led_dat->gpiod, level,
NULL, NULL);
led_dat->blinking = 0;
} else
if (led_dat->can_sleep)
gpiod_set_value_cansleep(led_dat->gpiod, level);
else
gpiod_set_value(led_dat->gpiod, level);
}
}
static int gpio_led_set_blocking(struct led_classdev *led_cdev,
enum led_brightness value)
{
gpio_led_set(led_cdev, value);
return 0;
}
static int gpio_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
@ -125,12 +111,15 @@ static int create_gpio_led(const struct gpio_led *template,
led_dat->cdev.name = template->name;
led_dat->cdev.default_trigger = template->default_trigger;
led_dat->can_sleep = gpiod_cansleep(led_dat->gpiod);
if (!led_dat->can_sleep)
led_dat->cdev.brightness_set = gpio_led_set;
else
led_dat->cdev.brightness_set_blocking = gpio_led_set_blocking;
led_dat->blinking = 0;
if (blink_set) {
led_dat->platform_gpio_blink_set = blink_set;
led_dat->cdev.blink_set = gpio_blink_set;
}
led_dat->cdev.brightness_set = gpio_led_set;
if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP)
state = !!gpiod_get_value_cansleep(led_dat->gpiod);
else
@ -143,17 +132,9 @@ static int create_gpio_led(const struct gpio_led *template,
if (ret < 0)
return ret;
INIT_WORK(&led_dat->work, gpio_led_work);
return led_classdev_register(parent, &led_dat->cdev);
}
static void delete_gpio_led(struct gpio_led_data *led)
{
led_classdev_unregister(&led->cdev);
cancel_work_sync(&led->work);
}
struct gpio_leds_priv {
int num_leds;
struct gpio_led_data leds[];
@ -233,7 +214,7 @@ static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
err:
for (count = priv->num_leds - 1; count >= 0; count--)
delete_gpio_led(&priv->leds[count]);
led_classdev_unregister(&priv->leds[count].cdev);
return ERR_PTR(ret);
}
@ -265,7 +246,8 @@ static int gpio_led_probe(struct platform_device *pdev)
if (ret < 0) {
/* On failure: unwind the led creations */
for (i = i - 1; i >= 0; i--)
delete_gpio_led(&priv->leds[i]);
led_classdev_unregister(
&priv->leds[i].cdev);
return ret;
}
}
@ -286,7 +268,7 @@ static int gpio_led_remove(struct platform_device *pdev)
int i;
for (i = 0; i < priv->num_leds; i++)
delete_gpio_led(&priv->leds[i]);
led_classdev_unregister(&priv->leds[i].cdev);
return 0;
}