Commit 6a77d866 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'leds_for_4.15rc1' of...

Merge tag 'leds_for_4.15rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds

Pull LED updates from Jacek Anaszewski:
 "New LED class driver:
   - add a driver for PC Engines APU/APU2 LEDs

  New LED trigger:
   - add a system activity LED trigger

  LED core improvements:
   - replace flags bit shift with BIT() macros

  Convert timers to use timer_setup() in:
   - led-core
   - ledtrig-activity
   - ledtrig-heartbeat
   - ledtrig-transient

  LED class drivers fixes:
   - lp55xx: fix spelling mistake: 'cound' -> 'could'
   - tca6507: Remove unnecessary reg check
   - pca955x: Don't invert requested value in pca955x_gpio_set_value()

  LED documentation improvements:
   - update 00-INDEX file"

* tag 'leds_for_4.15rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
  leds: Add driver for PC Engines APU/APU2 LEDs
  leds: lp55xx: fix spelling mistake: 'cound' -> 'could'
  leds: Convert timers to use timer_setup()
  Documentation: leds: Update 00-INDEX file
  leds: tca6507: Remove unnecessary reg check
  leds: ledtrig-heartbeat: Convert timers to use timer_setup()
  leds: Replace flags bit shift with BIT() macros
  leds: pca955x: Don't invert requested value in pca955x_gpio_set_value()
  leds: ledtrig-activity: Add a system activity LED trigger
parents 9f7a9b11 3faee942
......@@ -4,6 +4,10 @@ leds-blinkm.txt
- Driver for BlinkM LED-devices.
leds-class.txt
- documents LED handling under Linux.
leds-class-flash.txt
- documents flash LED handling under Linux.
leds-lm3556.txt
- notes on how to use the leds-lm3556 driver.
leds-lp3944.txt
- notes on how to use the leds-lp3944 driver.
leds-lp5521.txt
......@@ -16,7 +20,13 @@ leds-lp55xx.txt
- description about lp55xx common driver.
leds-lm3556.txt
- notes on how to use the leds-lm3556 driver.
leds-mlxcpld.txt
- notes on how to use the leds-mlxcpld driver.
ledtrig-oneshot.txt
- One-shot LED trigger for both sporadic and dense events.
ledtrig-transient.txt
- LED Transient Trigger, one shot timer activation.
ledtrig-usbport.txt
- notes on how to use the drivers/usb/core/ledtrig-usbport.c trigger.
uleds.txt
- notes on how to use the uleds driver.
......@@ -57,6 +57,16 @@ config LEDS_AAT1290
depends on PINCTRL
help
This option enables support for the LEDs on the AAT1290.
config LEDS_APU
tristate "Front panel LED support for PC Engines APU/APU2 boards"
depends on LEDS_CLASS
depends on X86 && DMI
help
This driver makes the PC Engines APU/APU2 front panel LEDs
accessible from userspace programs through the LED subsystem.
To compile this driver as a module, choose M here: the
module will be called leds-apu.
config LEDS_AS3645A
tristate "AS3645A LED flash controller support"
......
......@@ -9,6 +9,7 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
# LED Platform Drivers
obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o
obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o
obj-$(CONFIG_LEDS_APU) += leds-apu.o
obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o
obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o
obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o
......
......@@ -45,9 +45,9 @@ static int __led_set_brightness_blocking(struct led_classdev *led_cdev,
return led_cdev->brightness_set_blocking(led_cdev, value);
}
static void led_timer_function(unsigned long data)
static void led_timer_function(struct timer_list *t)
{
struct led_classdev *led_cdev = (void *)data;
struct led_classdev *led_cdev = from_timer(led_cdev, t, blink_timer);
unsigned long brightness;
unsigned long delay;
......@@ -178,8 +178,7 @@ 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);
timer_setup(&led_cdev->blink_timer, led_timer_function, 0);
}
EXPORT_SYMBOL_GPL(led_init_core);
......
/*
* drivers/leds/leds-apu.c
* Copyright (C) 2017 Alan Mizrahi, alan at mizrahi dot com dot ve
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#define APU1_FCH_ACPI_MMIO_BASE 0xFED80000
#define APU1_FCH_GPIO_BASE (APU1_FCH_ACPI_MMIO_BASE + 0x01BD)
#define APU1_LEDON 0x08
#define APU1_LEDOFF 0xC8
#define APU1_NUM_GPIO 3
#define APU1_IOSIZE sizeof(u8)
#define APU2_FCH_ACPI_MMIO_BASE 0xFED80000
#define APU2_FCH_GPIO_BASE (APU2_FCH_ACPI_MMIO_BASE + 0x1500)
#define APU2_GPIO_BIT_WRITE 22
#define APU2_APU2_NUM_GPIO 4
#define APU2_IOSIZE sizeof(u32)
/* LED access parameters */
struct apu_param {
void __iomem *addr; /* for ioread/iowrite */
};
/* LED private data */
struct apu_led_priv {
struct led_classdev cdev;
struct apu_param param;
};
#define cdev_to_priv(c) container_of(c, struct apu_led_priv, cdev)
/* LED profile */
struct apu_led_profile {
const char *name;
enum led_brightness brightness;
unsigned long offset; /* for devm_ioremap */
};
/* Supported platform types */
enum apu_led_platform_types {
APU1_LED_PLATFORM,
APU2_LED_PLATFORM,
};
struct apu_led_pdata {
struct platform_device *pdev;
struct apu_led_priv *pled;
const struct apu_led_profile *profile;
enum apu_led_platform_types platform;
int num_led_instances;
int iosize; /* for devm_ioremap() */
spinlock_t lock;
};
static struct apu_led_pdata *apu_led;
static const struct apu_led_profile apu1_led_profile[] = {
{ "apu:green:1", LED_ON, APU1_FCH_GPIO_BASE + 0 * APU1_IOSIZE },
{ "apu:green:2", LED_OFF, APU1_FCH_GPIO_BASE + 1 * APU1_IOSIZE },
{ "apu:green:3", LED_OFF, APU1_FCH_GPIO_BASE + 2 * APU1_IOSIZE },
};
static const struct apu_led_profile apu2_led_profile[] = {
{ "apu2:green:1", LED_ON, APU2_FCH_GPIO_BASE + 68 * APU2_IOSIZE },
{ "apu2:green:2", LED_OFF, APU2_FCH_GPIO_BASE + 69 * APU2_IOSIZE },
{ "apu2:green:3", LED_OFF, APU2_FCH_GPIO_BASE + 70 * APU2_IOSIZE },
};
static const struct dmi_system_id apu_led_dmi_table[] __initconst = {
{
.ident = "apu",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_PRODUCT_NAME, "APU")
}
},
{
.ident = "apu2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
DMI_MATCH(DMI_BOARD_NAME, "APU2")
}
},
{}
};
MODULE_DEVICE_TABLE(dmi, apu_led_dmi_table);
static void apu1_led_brightness_set(struct led_classdev *led, enum led_brightness value)
{
struct apu_led_priv *pled = cdev_to_priv(led);
spin_lock(&apu_led->lock);
iowrite8(value ? APU1_LEDON : APU1_LEDOFF, pled->param.addr);
spin_unlock(&apu_led->lock);
}
static void apu2_led_brightness_set(struct led_classdev *led, enum led_brightness value)
{
struct apu_led_priv *pled = cdev_to_priv(led);
u32 value_new;
spin_lock(&apu_led->lock);
value_new = ioread32(pled->param.addr);
if (value)
value_new &= ~BIT(APU2_GPIO_BIT_WRITE);
else
value_new |= BIT(APU2_GPIO_BIT_WRITE);
iowrite32(value_new, pled->param.addr);
spin_unlock(&apu_led->lock);
}
static int apu_led_config(struct device *dev, struct apu_led_pdata *apuld)
{
int i;
int err;
apu_led->pled = devm_kzalloc(dev,
sizeof(struct apu_led_priv) * apu_led->num_led_instances,
GFP_KERNEL);
if (!apu_led->pled)
return -ENOMEM;
for (i = 0; i < apu_led->num_led_instances; i++) {
struct apu_led_priv *pled = &apu_led->pled[i];
struct led_classdev *led_cdev = &pled->cdev;
led_cdev->name = apu_led->profile[i].name;
led_cdev->brightness = apu_led->profile[i].brightness;
led_cdev->max_brightness = 1;
led_cdev->flags = LED_CORE_SUSPENDRESUME;
if (apu_led->platform == APU1_LED_PLATFORM)
led_cdev->brightness_set = apu1_led_brightness_set;
else if (apu_led->platform == APU2_LED_PLATFORM)
led_cdev->brightness_set = apu2_led_brightness_set;
pled->param.addr = devm_ioremap(dev,
apu_led->profile[i].offset, apu_led->iosize);
if (!pled->param.addr) {
err = -ENOMEM;
goto error;
}
err = led_classdev_register(dev, led_cdev);
if (err)
goto error;
led_cdev->brightness_set(led_cdev, apu_led->profile[i].brightness);
}
return 0;
error:
while (i-- > 0)
led_classdev_unregister(&apu_led->pled[i].cdev);
return err;
}
static int __init apu_led_probe(struct platform_device *pdev)
{
apu_led = devm_kzalloc(&pdev->dev, sizeof(*apu_led), GFP_KERNEL);
if (!apu_led)
return -ENOMEM;
apu_led->pdev = pdev;
if (dmi_match(DMI_BOARD_NAME, "APU")) {
apu_led->profile = apu1_led_profile;
apu_led->platform = APU1_LED_PLATFORM;
apu_led->num_led_instances = ARRAY_SIZE(apu1_led_profile);
apu_led->iosize = APU1_IOSIZE;
} else if (dmi_match(DMI_BOARD_NAME, "APU2")) {
apu_led->profile = apu2_led_profile;
apu_led->platform = APU2_LED_PLATFORM;
apu_led->num_led_instances = ARRAY_SIZE(apu2_led_profile);
apu_led->iosize = APU2_IOSIZE;
}
spin_lock_init(&apu_led->lock);
return apu_led_config(&pdev->dev, apu_led);
}
static struct platform_driver apu_led_driver = {
.driver = {
.name = KBUILD_MODNAME,
},
};
static int __init apu_led_init(void)
{
struct platform_device *pdev;
int err;
if (!dmi_match(DMI_SYS_VENDOR, "PC Engines")) {
pr_err("No PC Engines board detected\n");
return -ENODEV;
}
if (!(dmi_match(DMI_PRODUCT_NAME, "APU") || dmi_match(DMI_PRODUCT_NAME, "APU2"))) {
pr_err("Unknown PC Engines board: %s\n",
dmi_get_system_info(DMI_PRODUCT_NAME));
return -ENODEV;
}
pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
if (IS_ERR(pdev)) {
pr_err("Device allocation failed\n");
return PTR_ERR(pdev);
}
err = platform_driver_probe(&apu_led_driver, apu_led_probe);
if (err) {
pr_err("Probe platform driver failed\n");
platform_device_unregister(pdev);
}
return err;
}
static void __exit apu_led_exit(void)
{
int i;
for (i = 0; i < apu_led->num_led_instances; i++)
led_classdev_unregister(&apu_led->pled[i].cdev);
platform_device_unregister(apu_led->pdev);
platform_driver_unregister(&apu_led_driver);
}
module_init(apu_led_init);
module_exit(apu_led_exit);
MODULE_AUTHOR("Alan Mizrahi");
MODULE_DESCRIPTION("PC Engines APU family LED driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:leds_apu");
......@@ -323,7 +323,7 @@ static int lp5523_init_program_engine(struct lp55xx_chip *chip)
if (status != LP5523_ENG_STATUS_MASK) {
dev_err(&chip->cl->dev,
"cound not configure LED engine, status = 0x%.2x\n",
"could not configure LED engine, status = 0x%.2x\n",
status);
ret = -1;
}
......
......@@ -61,6 +61,10 @@
#define PCA955X_LS_BLINK0 0x2 /* Blink at PWM0 rate */
#define PCA955X_LS_BLINK1 0x3 /* Blink at PWM1 rate */
#define PCA955X_GPIO_INPUT LED_OFF
#define PCA955X_GPIO_HIGH LED_OFF
#define PCA955X_GPIO_LOW LED_FULL
enum pca955x_type {
pca9550,
pca9551,
......@@ -329,9 +333,9 @@ static int pca955x_set_value(struct gpio_chip *gc, unsigned int offset,
struct pca955x_led *led = &pca955x->leds[offset];
if (val)
return pca955x_led_set(&led->led_cdev, LED_FULL);
else
return pca955x_led_set(&led->led_cdev, LED_OFF);
return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_HIGH);
return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_LOW);
}
static void pca955x_gpio_set_value(struct gpio_chip *gc, unsigned int offset,
......@@ -355,8 +359,11 @@ static int pca955x_gpio_get_value(struct gpio_chip *gc, unsigned int offset)
static int pca955x_gpio_direction_input(struct gpio_chip *gc,
unsigned int offset)
{
/* To use as input ensure pin is not driven */
return pca955x_set_value(gc, offset, 0);
struct pca955x *pca955x = gpiochip_get_data(gc);
struct pca955x_led *led = &pca955x->leds[offset];
/* To use as input ensure pin is not driven. */
return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_INPUT);
}
static int pca955x_gpio_direction_output(struct gpio_chip *gc,
......
......@@ -715,7 +715,7 @@ tca6507_led_dt_init(struct i2c_client *client)
if (of_property_match_string(child, "compatible", "gpio") >= 0)
led.flags |= TCA6507_MAKE_GPIO;
ret = of_property_read_u32(child, "reg", &reg);
if (ret != 0 || reg < 0 || reg >= NUM_LEDS)
if (ret != 0 || reg >= NUM_LEDS)
continue;
tca_leds[reg] = led;
......
......@@ -77,6 +77,15 @@ config LEDS_TRIGGER_CPU
If unsure, say N.
config LEDS_TRIGGER_ACTIVITY
tristate "LED activity Trigger"
depends on LEDS_TRIGGERS
help
This allows LEDs to be controlled by a immediate CPU usage.
The flash frequency and duty cycle varies from faint flashes to
intense brightness depending on the instant CPU load.
If unsure, say N.
config LEDS_TRIGGER_GPIO
tristate "LED GPIO Trigger"
depends on LEDS_TRIGGERS
......
......@@ -7,6 +7,7 @@ obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT) += ledtrig-heartbeat.o
obj-$(CONFIG_LEDS_TRIGGER_BACKLIGHT) += ledtrig-backlight.o
obj-$(CONFIG_LEDS_TRIGGER_GPIO) += ledtrig-gpio.o
obj-$(CONFIG_LEDS_TRIGGER_CPU) += ledtrig-cpu.o
obj-$(CONFIG_LEDS_TRIGGER_ACTIVITY) += ledtrig-activity.o
obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT) += ledtrig-transient.o
obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
......
/*
* Activity LED trigger
*
* Copyright (C) 2017 Willy Tarreau <w@1wt.eu>
* Partially based on Atsushi Nemoto's ledtrig-heartbeat.c.
*
* 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>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include "../leds.h"
static int panic_detected;
struct activity_data {
struct timer_list timer;
struct led_classdev *led_cdev;
u64 last_used;
u64 last_boot;
int time_left;
int state;
int invert;
};
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;
u64 curr_used;
u64 curr_boot;
s32 diff_used;
s32 diff_boot;
int cpus;
int i;
if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE, &led_cdev->work_flags))
led_cdev->blink_brightness = led_cdev->new_blink_brightness;
if (unlikely(panic_detected)) {
/* full brightness in case of panic */
led_set_brightness_nosleep(led_cdev, led_cdev->blink_brightness);
return;
}
get_monotonic_boottime(&boot_time);
cpus = 0;
curr_used = 0;
for_each_possible_cpu(i) {
curr_used += kcpustat_cpu(i).cpustat[CPUTIME_USER]
+ kcpustat_cpu(i).cpustat[CPUTIME_NICE]
+ kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]
+ kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]
+ kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
cpus++;
}
/* We come here every 100ms in the worst case, so that's 100M ns of
* cumulated time. By dividing by 2^16, we get the time resolution
* 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;
diff_boot = (curr_boot - activity_data->last_boot) >> 16;
diff_used = (curr_used - activity_data->last_used) >> 16;
activity_data->last_boot = curr_boot;
activity_data->last_used = curr_used;
if (diff_boot <= 0 || diff_used < 0)
usage = 0;
else if (diff_used >= diff_boot)
usage = 100;
else
usage = 100 * diff_used / diff_boot;
/*
* Now we know the total boot_time multiplied by the number of CPUs, and
* the total idle+wait time for all CPUs. We'll compare how they evolved
* since last call. The % of overall CPU usage is :
*
* 1 - delta_idle / delta_boot
*
* What we want is that when the CPU usage is zero, the LED must blink
* slowly with very faint flashes that are detectable but not disturbing
* (typically 10ms every second, or 10ms ON, 990ms OFF). Then we want
* blinking frequency to increase up to the point where the load is
* enough to saturate one core in multi-core systems or 50% in single
* core systems. At this point it should reach 10 Hz with a 10/90 duty
* cycle (10ms ON, 90ms OFF). After this point, the blinking frequency
* remains stable (10 Hz) and only the duty cycle increases to report
* the activity, up to the point where we have 90ms ON, 10ms OFF when
* all cores are saturated. It's important that the LED never stays in
* a steady state so that it's easy to distinguish an idle or saturated
* machine from a hung one.
*
* This gives us :
* - a target CPU usage of min(50%, 100%/#CPU) for a 10% duty cycle
* (10ms ON, 90ms OFF)
* - below target :
* ON_ms = 10
* OFF_ms = 90 + (1 - usage/target) * 900
* - above target :
* ON_ms = 10 + (usage-target)/(100%-target) * 80
* OFF_ms = 90 - (usage-target)/(100%-target) * 80
*
* In order to keep a good responsiveness, we cap the sleep time to
* 100 ms and keep track of the sleep time left. This allows us to
* quickly change it if needed.
*/
activity_data->time_left -= 100;
if (activity_data->time_left <= 0) {
activity_data->time_left = 0;
activity_data->state = !activity_data->state;
led_set_brightness_nosleep(led_cdev,
(activity_data->state ^ activity_data->invert) ?
led_cdev->blink_brightness : LED_OFF);
}
target = (cpus > 1) ? (100 / cpus) : 50;
if (usage < target)
delay = activity_data->state ?
10 : /* ON */
990 - 900 * usage / target; /* OFF */
else
delay = activity_data->state ?
10 + 80 * (usage - target) / (100 - target) : /* ON */
90 - 80 * (usage - target) / (100 - target); /* OFF */
if (!activity_data->time_left || delay <= activity_data->time_left)
activity_data->time_left = delay;
delay = min_t(int, activity_data->time_left, 100);
mod_timer(&activity_data->timer, jiffies + msecs_to_jiffies(delay));
}
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;
return sprintf(buf, "%u\n", activity_data->invert);
}
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;
unsigned long state;
int ret;
ret = kstrtoul(buf, 0, &state);
if (ret)
return ret;
activity_data->invert = !!state;
return size;
}
static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
static void 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;
led_cdev->trigger_data = activity_data;
rc = device_create_file(led_cdev->dev, &dev_attr_invert);
if (rc) {
kfree(led_cdev->trigger_data);
return;
}
activity_data->led_cdev = led_cdev;
timer_setup(&activity_data->timer, led_activity_function, 0);
if (!led_cdev->blink_brightness)
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;
}
static void activity_deactivate(struct led_classdev *led_cdev)
{
struct activity_data *activity_data = led_cdev->trigger_data;
if (led_cdev->activated) {