47 lines
1003 B
C
47 lines
1003 B
C
|
/* Copyright 2013 The Chromium OS Authors. All rights reserved.
|
||
|
|
* Use of this source code is governed by a BSD-style license that can be
|
||
|
|
* found in the LICENSE file.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* PWM control module for keyboard backlight. */
|
||
|
|
|
||
|
|
#include "common.h"
|
||
|
|
#include "keyboard_backlight.h"
|
||
|
|
#include "pwm.h"
|
||
|
|
#include "system.h"
|
||
|
|
#include "util.h"
|
||
|
|
|
||
|
|
const enum pwm_channel kblight_pwm_ch = PWM_CH_KBLIGHT;
|
||
|
|
|
||
|
|
static int kblight_pwm_set(int percent)
|
||
|
|
{
|
||
|
|
pwm_set_duty(kblight_pwm_ch, percent);
|
||
|
|
return EC_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int kblight_pwm_get(void)
|
||
|
|
{
|
||
|
|
return pwm_get_duty(kblight_pwm_ch);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int kblight_pwm_init(void)
|
||
|
|
{
|
||
|
|
/* dnojiri: Why do we need save/restore setting over sysjump? */
|
||
|
|
kblight_pwm_set(0);
|
||
|
|
pwm_enable(kblight_pwm_ch, 1);
|
||
|
|
return EC_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int kblight_pwm_enable(int enable)
|
||
|
|
{
|
||
|
|
pwm_enable(kblight_pwm_ch, enable);
|
||
|
|
return EC_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct kblight_drv kblight_pwm = {
|
||
|
|
.init = kblight_pwm_init,
|
||
|
|
.set = kblight_pwm_set,
|
||
|
|
.get = kblight_pwm_get,
|
||
|
|
.enable = kblight_pwm_enable,
|
||
|
|
};
|