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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2018-07-02 20:05:32 (GMT)
committerJacek Anaszewski <jacek.anaszewski@gmail.com>2018-07-05 21:21:14 (GMT)
commit13d698cbd99ce90f1d6b4fb0ff11ab90eb55f55e (patch)
treea7f57248e44e524c976b5a395e5e93a8731ef1b3 /drivers/leds
parent5cccc555108b602f92101a939143925095ff9b1d (diff)
leds: activity trigger: simplifications from core changes
The trigger core learned error handling for the activate callback and can handle device attributes now. This allows simplifying the driver considerably. Note that .deactivate() is only called when .activate() succeeded, so the check for .activated can go away in .deactivate(). Also make use of module_led_trigger() and the accessor function to get and set trigger_data. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/trigger/ledtrig-activity.c38
1 files changed, 16 insertions, 22 deletions
diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
index 2fc065f..bcbf41c 100644
--- a/drivers/leds/trigger/ledtrig-activity.c
+++ b/drivers/leds/trigger/ledtrig-activity.c
@@ -152,8 +152,7 @@ static void led_activity_function(struct timer_list *t)
static ssize_t led_invert_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct activity_data *activity_data = led_cdev->trigger_data;
+ struct activity_data *activity_data = led_trigger_get_drvdata(dev);
return sprintf(buf, "%u\n", activity_data->invert);
}
@@ -162,8 +161,7 @@ static ssize_t led_invert_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct activity_data *activity_data = led_cdev->trigger_data;
+ struct activity_data *activity_data = led_trigger_get_drvdata(dev);
unsigned long state;
int ret;
@@ -178,21 +176,21 @@ static ssize_t led_invert_store(struct device *dev,
static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
+static struct attribute *activity_led_attrs[] = {
+ &dev_attr_invert.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(activity_led);
+
static int activity_activate(struct led_classdev *led_cdev)
{
struct activity_data *activity_data;
- int rc;
activity_data = kzalloc(sizeof(*activity_data), GFP_KERNEL);
if (!activity_data)
- return 0;
+ return -ENOMEM;
- led_cdev->trigger_data = activity_data;
- rc = device_create_file(led_cdev->dev, &dev_attr_invert);
- if (rc) {
- kfree(led_cdev->trigger_data);
- return 0;
- }
+ led_set_trigger_data(led_cdev, activity_data);
activity_data->led_cdev = led_cdev;
timer_setup(&activity_data->timer, led_activity_function, 0);
@@ -200,28 +198,24 @@ static int activity_activate(struct led_classdev *led_cdev)
led_cdev->blink_brightness = led_cdev->max_brightness;
led_activity_function(&activity_data->timer);
set_bit(LED_BLINK_SW, &led_cdev->work_flags);
- led_cdev->activated = true;
return 0;
}
static void activity_deactivate(struct led_classdev *led_cdev)
{
- struct activity_data *activity_data = led_cdev->trigger_data;
-
- if (led_cdev->activated) {
- del_timer_sync(&activity_data->timer);
- device_remove_file(led_cdev->dev, &dev_attr_invert);
- kfree(activity_data);
- clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
- led_cdev->activated = false;
- }
+ struct activity_data *activity_data = led_get_trigger_data(led_cdev);
+
+ del_timer_sync(&activity_data->timer);
+ kfree(activity_data);
+ clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
}
static struct led_trigger activity_led_trigger = {
.name = "activity",
.activate = activity_activate,
.deactivate = activity_deactivate,
+ .groups = activity_led_groups,
};
static int activity_reboot_notifier(struct notifier_block *nb,

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