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led-class: change back LEDS_CLASS to tristate instead of bool
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After moving some core functions to led-core.c, led-class.c can be built
as module again.

Signed-off-by: Bryan Wu <[email protected]>
Acked-by: Richard Purdie <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Bryan Wu authored and torvalds committed Mar 23, 2012
1 parent cea694c commit a403d93
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Showing 3 changed files with 71 additions and 71 deletions.
2 changes: 1 addition & 1 deletion drivers/leds/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ menuconfig NEW_LEDS
if NEW_LEDS

config LEDS_CLASS
bool "LED Class Support"
tristate "LED Class Support"
help
This option enables the led sysfs class in /sys/class/leds. You'll
need this to do anything useful with LEDs. If unsure, say N.
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70 changes: 0 additions & 70 deletions drivers/leds/led-class.c
Original file line number Diff line number Diff line change
Expand Up @@ -110,50 +110,6 @@ static void led_timer_function(unsigned long data)
mod_timer(&led_cdev->blink_timer, jiffies + msecs_to_jiffies(delay));
}

static void led_stop_software_blink(struct led_classdev *led_cdev)
{
/* deactivate previous settings */
del_timer_sync(&led_cdev->blink_timer);
led_cdev->blink_delay_on = 0;
led_cdev->blink_delay_off = 0;
}

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;

if (led_get_trigger_data(led_cdev) &&
delay_on == led_cdev->blink_delay_on &&
delay_off == led_cdev->blink_delay_off)
return;

led_stop_software_blink(led_cdev);

led_cdev->blink_delay_on = delay_on;
led_cdev->blink_delay_off = delay_off;

/* never on - don't blink */
if (!delay_on)
return;

/* never off - just set to brightness */
if (!delay_off) {
led_set_brightness(led_cdev, led_cdev->blink_brightness);
return;
}

mod_timer(&led_cdev->blink_timer, jiffies + 1);
}


/**
* led_classdev_suspend - suspend an led_classdev.
* @led_cdev: the led_classdev to suspend.
Expand Down Expand Up @@ -262,32 +218,6 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
}
EXPORT_SYMBOL_GPL(led_classdev_unregister);

void led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
del_timer_sync(&led_cdev->blink_timer);

if (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);
}
EXPORT_SYMBOL(led_blink_set);

void led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
led_stop_software_blink(led_cdev);
led_cdev->brightness_set(led_cdev, brightness);
}
EXPORT_SYMBOL(led_brightness_set);

static int __init leds_init(void)
{
leds_class = class_create(THIS_MODULE, "leds");
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70 changes: 70 additions & 0 deletions drivers/leds/led-core.c
Original file line number Diff line number Diff line change
Expand Up @@ -23,3 +23,73 @@ EXPORT_SYMBOL_GPL(leds_list_lock);

LIST_HEAD(leds_list);
EXPORT_SYMBOL_GPL(leds_list);

static void led_stop_software_blink(struct led_classdev *led_cdev)
{
/* deactivate previous settings */
del_timer_sync(&led_cdev->blink_timer);
led_cdev->blink_delay_on = 0;
led_cdev->blink_delay_off = 0;
}

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;

if (led_get_trigger_data(led_cdev) &&
delay_on == led_cdev->blink_delay_on &&
delay_off == led_cdev->blink_delay_off)
return;

led_stop_software_blink(led_cdev);

led_cdev->blink_delay_on = delay_on;
led_cdev->blink_delay_off = delay_off;

/* never on - don't blink */
if (!delay_on)
return;

/* never off - just set to brightness */
if (!delay_off) {
led_set_brightness(led_cdev, led_cdev->blink_brightness);
return;
}

mod_timer(&led_cdev->blink_timer, jiffies + 1);
}


void led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
del_timer_sync(&led_cdev->blink_timer);

if (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);
}
EXPORT_SYMBOL(led_blink_set);

void led_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
led_stop_software_blink(led_cdev);
led_cdev->brightness_set(led_cdev, brightness);
}
EXPORT_SYMBOL(led_brightness_set);

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