u8 new_level;
u8 can_sleep;
u8 active_low;
+ int (*platform_gpio_blink_set)(unsigned gpio,
+ unsigned long *delay_on, unsigned long *delay_off);
};
static void gpio_led_work(struct work_struct *work)
if (led_dat->active_low)
level = !level;
- /* setting GPIOs with I2C/etc requires a preemptible task context */
+ /* 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) {
- if (preempt_count()) {
- led_dat->new_level = level;
- schedule_work(&led_dat->work);
- } else
- gpio_set_value_cansleep(led_dat->gpio, level);
+ led_dat->new_level = level;
+ schedule_work(&led_dat->work);
} else
gpio_set_value(led_dat->gpio, level);
}
+static int gpio_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct gpio_led_data *led_dat =
+ container_of(led_cdev, struct gpio_led_data, cdev);
+
+ return led_dat->platform_gpio_blink_set(led_dat->gpio, delay_on, delay_off);
+}
+
static int gpio_led_probe(struct platform_device *pdev)
{
struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
cur_led = &pdata->leds[i];
led_dat = &leds_data[i];
+ ret = gpio_request(cur_led->gpio, cur_led->name);
+ if (ret < 0)
+ goto err;
+
led_dat->cdev.name = cur_led->name;
led_dat->cdev.default_trigger = cur_led->default_trigger;
led_dat->gpio = cur_led->gpio;
led_dat->can_sleep = gpio_cansleep(cur_led->gpio);
led_dat->active_low = cur_led->active_low;
+ if (pdata->gpio_blink_set) {
+ led_dat->platform_gpio_blink_set = pdata->gpio_blink_set;
+ led_dat->cdev.blink_set = gpio_blink_set;
+ }
led_dat->cdev.brightness_set = gpio_led_set;
- led_dat->cdev.brightness = cur_led->active_low ? LED_FULL : LED_OFF;
-
- ret = gpio_request(led_dat->gpio, led_dat->cdev.name);
- if (ret < 0)
- goto err;
+ led_dat->cdev.brightness = LED_OFF;
gpio_direction_output(led_dat->gpio, led_dat->active_low);
MODULE_AUTHOR("Raphael Assenat <raph@8d.com>");
MODULE_DESCRIPTION("GPIO LED driver");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-gpio");