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