Release 4.7 drivers/leds/led-core.c
/*
* LED Class Core
*
* Copyright 2005-2006 Openedhand Ltd.
*
* Author: Richard Purdie <rpurdie@openedhand.com>
*
* 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/kernel.h>
#include <linux/leds.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include "leds.h"
DECLARE_RWSEM(leds_list_lock);
EXPORT_SYMBOL_GPL(leds_list_lock);
LIST_HEAD(leds_list);
EXPORT_SYMBOL_GPL(leds_list);
static int __led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness value)
{
if (!led_cdev->brightness_set)
return -ENOTSUPP;
led_cdev->brightness_set(led_cdev, value);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| heiner kallweit | heiner kallweit | 38 | 100.00% | 1 | 100.00% |
| Total | 38 | 100.00% | 1 | 100.00% |
static int __led_set_brightness_blocking(struct led_classdev *led_cdev,
enum led_brightness value)
{
if (!led_cdev->brightness_set_blocking)
return -ENOTSUPP;
return led_cdev->brightness_set_blocking(led_cdev, value);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| heiner kallweit | heiner kallweit | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
static void led_timer_function(unsigned long data)
{
struct led_classdev *led_cdev = (void *)data;
unsigned long brightness;
unsigned long delay;
if (!led_cdev->blink_delay_on || !led_cdev->blink_delay_off) {
led_set_brightness_nosleep(led_cdev, LED_OFF);
led_cdev->flags &= ~LED_BLINK_SW;
return;
}
if (led_cdev->flags & LED_BLINK_ONESHOT_STOP) {
led_cdev->flags &= ~(LED_BLINK_ONESHOT_STOP | LED_BLINK_SW);
return;
}
brightness = led_get_brightness(led_cdev);
if (!brightness) {
/* Time to switch the LED on. */
brightness = led_cdev->blink_brightness;
delay = led_cdev->blink_delay_on;
} else {
/* Store the current brightness value to be able
* to restore it when the delay_off period is over.
* Do it only if there is no pending blink brightness
* change, to avoid overwriting the new value.
*/
if (!(led_cdev->flags & LED_BLINK_BRIGHTNESS_CHANGE))
led_cdev->blink_brightness = brightness;
else
led_cdev->flags &= ~LED_BLINK_BRIGHTNESS_CHANGE;
brightness = LED_OFF;
delay = led_cdev->blink_delay_off;
}
led_set_brightness_nosleep(led_cdev, brightness);
/* Return in next iteration if led is in one-shot mode and we are in
* the final blink state so that the led is toggled each delay_on +
* delay_off milliseconds in worst case.
*/
if (led_cdev->flags & LED_BLINK_ONESHOT) {
if (led_cdev->flags & LED_BLINK_INVERT) {
if (brightness)
led_cdev->flags |= LED_BLINK_ONESHOT_STOP;
} else {
if (!brightness)
led_cdev->flags |= LED_BLINK_ONESHOT_STOP;
}
}
mod_timer(&led_cdev->blink_timer, jiffies + msecs_to_jiffies(delay));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 202 | 94.84% | 3 | 75.00% |
| tony makkiel | tony makkiel | 11 | 5.16% | 1 | 25.00% |
| Total | 213 | 100.00% | 4 | 100.00% |
static void set_brightness_delayed(struct work_struct *ws)
{
struct led_classdev *led_cdev =
container_of(ws, struct led_classdev, set_brightness_work);
int ret = 0;
if (led_cdev->flags & LED_BLINK_DISABLE) {
led_cdev->delayed_set_value = LED_OFF;
led_stop_software_blink(led_cdev);
led_cdev->flags &= ~LED_BLINK_DISABLE;
}
ret = __led_set_brightness(led_cdev, led_cdev->delayed_set_value);
if (ret == -ENOTSUPP)
ret = __led_set_brightness_blocking(led_cdev,
led_cdev->delayed_set_value);
if (ret < 0 &&
/* LED HW might have been unplugged, therefore don't warn */
!(ret == -ENODEV && (led_cdev->flags & LED_UNREGISTERING) &&
(led_cdev->flags & LED_HW_PLUGGABLE)))
dev_err(led_cdev->dev,
"Setting an LED's brightness failed (%d)\n", ret);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 97 | 74.62% | 3 | 60.00% |
| heiner kallweit | heiner kallweit | 33 | 25.38% | 2 | 40.00% |
| Total | 130 | 100.00% | 5 | 100.00% |
static void led_set_software_blink(struct led_classdev *led_cdev,
unsigned long delay_on,
unsigned long delay_off)
{
int current_brightness;
current_brightness = led_get_brightness(led_cdev);
if (current_brightness)
led_cdev->blink_brightness = current_brightness;
if (!led_cdev->blink_brightness)
led_cdev->blink_brightness = led_cdev->max_brightness;
led_cdev->blink_delay_on = delay_on;
led_cdev->blink_delay_off = delay_off;
/* never on - just set to off */
if (!delay_on) {
led_set_brightness_nosleep(led_cdev, LED_OFF);
return;
}
/* never off - just set to brightness */
if (!delay_off) {
led_set_brightness_nosleep(led_cdev,
led_cdev->blink_brightness);
return;
}
led_cdev->flags |= LED_BLINK_SW;
mod_timer(&led_cdev->blink_timer, jiffies + 1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| bryan wu | bryan wu | 97 | 82.20% | 1 | 20.00% |
| stefan sorensen | stefan sorensen | 9 | 7.63% | 1 | 20.00% |
| tony makkiel | tony makkiel | 6 | 5.08% | 1 | 20.00% |
| jiri kosina | jiri kosina | 4 | 3.39% | 1 | 20.00% |
| jacek anaszewski | jacek anaszewski | 2 | 1.69% | 1 | 20.00% |
| Total | 118 | 100.00% | 5 | 100.00% |
static void led_blink_setup(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
if (!(led_cdev->flags & LED_BLINK_ONESHOT) &&
led_cdev->blink_set &&
!led_cdev->blink_set(led_cdev, delay_on, delay_off))
return;
/* blink with 1 Hz as default if nothing specified */
if (!*delay_on && !*delay_off)
*delay_on = *delay_off = 500;
led_set_software_blink(led_cdev, *delay_on, *delay_off);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| bryan wu | bryan wu | 69 | 87.34% | 2 | 66.67% |
| fabio baltieri | fabio baltieri | 10 | 12.66% | 1 | 33.33% |
| Total | 79 | 100.00% | 3 | 100.00% |
void led_init_core(struct led_classdev *led_cdev)
{
INIT_WORK(&led_cdev->set_brightness_work, set_brightness_delayed);
setup_timer(&led_cdev->blink_timer, led_timer_function,
(unsigned long)led_cdev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(led_init_core);
void led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
del_timer_sync(&led_cdev->blink_timer);
led_cdev->flags &= ~LED_BLINK_ONESHOT;
led_cdev->flags &= ~LED_BLINK_ONESHOT_STOP;
led_blink_setup(led_cdev, delay_on, delay_off);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| fabio baltieri | fabio baltieri | 49 | 96.08% | 1 | 50.00% |
| jiri kosina | jiri kosina | 2 | 3.92% | 1 | 50.00% |
| Total | 51 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(led_blink_set);
void led_blink_set_oneshot(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off,
int invert)
{
if ((led_cdev->flags & LED_BLINK_ONESHOT) &&
timer_pending(&led_cdev->blink_timer))
return;
led_cdev->flags |= LED_BLINK_ONESHOT;
led_cdev->flags &= ~LED_BLINK_ONESHOT_STOP;
if (invert)
led_cdev->flags |= LED_BLINK_INVERT;
else
led_cdev->flags &= ~LED_BLINK_INVERT;
led_blink_setup(led_cdev, delay_on, delay_off);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| fabio baltieri | fabio baltieri | 80 | 97.56% | 1 | 50.00% |
| jiri kosina | jiri kosina | 2 | 2.44% | 1 | 50.00% |
| Total | 82 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(led_blink_set_oneshot);
void led_stop_software_blink(struct led_classdev *led_cdev)
{
del_timer_sync(&led_cdev->blink_timer);
led_cdev->blink_delay_on = 0;
led_cdev->blink_delay_off = 0;
led_cdev->flags &= ~LED_BLINK_SW;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| fabio baltieri | fabio baltieri | 14 | 37.84% | 2 | 40.00% |
| bryan wu | bryan wu | 14 | 37.84% | 1 | 20.00% |
| tony makkiel | tony makkiel | 7 | 18.92% | 1 | 20.00% |
| jiri kosina | jiri kosina | 2 | 5.41% | 1 | 20.00% |
| Total | 37 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(led_stop_software_blink);
void led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
/*
* If software blink is active, delay brightness setting
* until the next timer tick.
*/
if (led_cdev->flags & LED_BLINK_SW) {
/*
* If we need to disable soft blinking delegate this to the
* work queue task to avoid problems in case we are called
* from hard irq context.
*/
if (brightness == LED_OFF) {
led_cdev->flags |= LED_BLINK_DISABLE;
schedule_work(&led_cdev->set_brightness_work);
} else {
led_cdev->flags |= LED_BLINK_BRIGHTNESS_CHANGE;
led_cdev->blink_brightness = brightness;
}
return;
}
led_set_brightness_nosleep(led_cdev, brightness);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| fabio baltieri | fabio baltieri | 29 | 40.85% | 1 | 16.67% |
| jacek anaszewski | jacek anaszewski | 25 | 35.21% | 2 | 33.33% |
| bryan wu | bryan wu | 7 | 9.86% | 1 | 16.67% |
| stas sergeev | stas sergeev | 6 | 8.45% | 1 | 16.67% |
| tony makkiel | tony makkiel | 4 | 5.63% | 1 | 16.67% |
| Total | 71 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL_GPL(led_set_brightness);
void led_set_brightness_nopm(struct led_classdev *led_cdev,
enum led_brightness value)
{
/* Use brightness_set op if available, it is guaranteed not to sleep */
if (!__led_set_brightness(led_cdev, value))
return;
/* If brightness setting can sleep, delegate it to a work queue task */
led_cdev->delayed_set_value = value;
schedule_work(&led_cdev->set_brightness_work);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 38 | 92.68% | 1 | 50.00% |
| heiner kallweit | heiner kallweit | 3 | 7.32% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(led_set_brightness_nopm);
void led_set_brightness_nosleep(struct led_classdev *led_cdev,
enum led_brightness value)
{
led_cdev->brightness = min(value, led_cdev->max_brightness);
if (led_cdev->flags & LED_SUSPENDED)
return;
led_set_brightness_nopm(led_cdev, led_cdev->brightness);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 45 | 100.00% | 1 | 100.00% |
| Total | 45 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(led_set_brightness_nosleep);
int led_set_brightness_sync(struct led_classdev *led_cdev,
enum led_brightness value)
{
if (led_cdev->blink_delay_on || led_cdev->blink_delay_off)
return -EBUSY;
led_cdev->brightness = min(value, led_cdev->max_brightness);
if (led_cdev->flags & LED_SUSPENDED)
return 0;
return __led_set_brightness_blocking(led_cdev, led_cdev->brightness);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 61 | 98.39% | 1 | 50.00% |
| heiner kallweit | heiner kallweit | 1 | 1.61% | 1 | 50.00% |
| Total | 62 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(led_set_brightness_sync);
int led_update_brightness(struct led_classdev *led_cdev)
{
int ret = 0;
if (led_cdev->brightness_get) {
ret = led_cdev->brightness_get(led_cdev);
if (ret >= 0) {
led_cdev->brightness = ret;
return 0;
}
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(led_update_brightness);
/* Caller must ensure led_cdev->led_access held */
void led_sysfs_disable(struct led_classdev *led_cdev)
{
lockdep_assert_held(&led_cdev->led_access);
led_cdev->flags |= LED_SYSFS_DISABLE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(led_sysfs_disable);
/* Caller must ensure led_cdev->led_access held */
void led_sysfs_enable(struct led_classdev *led_cdev)
{
lockdep_assert_held(&led_cdev->led_access);
led_cdev->flags &= ~LED_SYSFS_DISABLE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(led_sysfs_enable);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jacek anaszewski | jacek anaszewski | 652 | 52.62% | 9 | 36.00% |
| bryan wu | bryan wu | 194 | 15.66% | 2 | 8.00% |
| fabio baltieri | fabio baltieri | 191 | 15.42% | 3 | 12.00% |
| heiner kallweit | heiner kallweit | 111 | 8.96% | 2 | 8.00% |
| richard purdie | richard purdie | 30 | 2.42% | 2 | 8.00% |
| tony makkiel | tony makkiel | 28 | 2.26% | 1 | 4.00% |
| jiri kosina | jiri kosina | 10 | 0.81% | 1 | 4.00% |
| stefan sorensen | stefan sorensen | 9 | 0.73% | 1 | 4.00% |
| stas sergeev | stas sergeev | 6 | 0.48% | 1 | 4.00% |
| marton nemeth | marton nemeth | 4 | 0.32% | 1 | 4.00% |
| ingo molnar | ingo molnar | 3 | 0.24% | 1 | 4.00% |
| shuah khan | shuah khan | 1 | 0.08% | 1 | 4.00% |
| Total | 1239 | 100.00% | 25 | 100.00% |
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