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path: root/drivers/leds/trigger/ledtrig-activity.c
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Diffstat (limited to 'drivers/leds/trigger/ledtrig-activity.c')
-rw-r--r--drivers/leds/trigger/ledtrig-activity.c51
1 files changed, 22 insertions, 29 deletions
diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
index 5081894082bd..bcbf41c90c30 100644
--- a/drivers/leds/trigger/ledtrig-activity.c
+++ b/drivers/leds/trigger/ledtrig-activity.c
@@ -7,8 +7,8 @@
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
*/
+
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
@@ -37,7 +37,6 @@ static void led_activity_function(struct timer_list *t)
struct activity_data *activity_data = from_timer(activity_data, t,
timer);
struct led_classdev *led_cdev = activity_data->led_cdev;
- struct timespec boot_time;
unsigned int target;
unsigned int usage;
int delay;
@@ -57,8 +56,6 @@ static void led_activity_function(struct timer_list *t)
return;
}
- get_monotonic_boottime(&boot_time);
-
cpus = 0;
curr_used = 0;
@@ -76,7 +73,7 @@ static void led_activity_function(struct timer_list *t)
* down to 16us, ensuring we won't overflow 32-bit computations below
* even up to 3k CPUs, while keeping divides cheap on smaller systems.
*/
- curr_boot = timespec_to_ns(&boot_time) * cpus;
+ curr_boot = ktime_get_boot_ns() * cpus;
diff_boot = (curr_boot - activity_data->last_boot) >> 16;
diff_used = (curr_used - activity_data->last_used) >> 16;
activity_data->last_boot = curr_boot;
@@ -155,8 +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);
}
@@ -165,8 +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;
@@ -181,21 +176,21 @@ static ssize_t led_invert_store(struct device *dev,
static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
-static void activity_activate(struct led_classdev *led_cdev)
+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;
+ 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;
- }
+ led_set_trigger_data(led_cdev, activity_data);
activity_data->led_cdev = led_cdev;
timer_setup(&activity_data->timer, led_activity_function, 0);
@@ -203,26 +198,24 @@ static void 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,
@@ -272,4 +265,4 @@ module_exit(activity_exit);
MODULE_AUTHOR("Willy Tarreau <w@1wt.eu>");
MODULE_DESCRIPTION("Activity LED trigger");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");