static ssize_t brightness_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
unsigned long state;
ssize_t ret;
mutex_lock(&led_cdev->led_access);
if (led_sysfs_is_disabled(led_cdev)) {
ret = -EBUSY;
goto unlock;
}
ret = kstrtoul(buf, 10, &state);
if (ret)
goto unlock;
if (state == LED_OFF)
led_trigger_remove(led_cdev);
led_set_brightness(led_cdev, state);
ret = size;
unlock:
mutex_unlock(&led_cdev->led_access);
return ret;
}
static ssize_t color_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct led_classdev *cdev = dev_get_drvdata(dev);
struct gb_channel *channel = get_channel_from_cdev(cdev);
u32 color;
int ret;
led_lock(cdev);
if (led_sysfs_is_disabled(cdev)) {
ret = -EBUSY;
goto unlock;
}
ret = kstrtou32(buf, 0, &color);
if (ret < 0) {
dev_err(dev, "could not parse color value %d\n", ret);
goto unlock;
}
ret = gb_lights_color_set(channel, color);
if (ret < 0)
goto unlock;
channel->color = color;
ret = size;
unlock:
led_unlock(cdev);
return ret;
}