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>
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 5db4515..7bc5328 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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;
}