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/* Copyright (c) 2012 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.
*/
#ifndef __CROS_EC_PWM_H
#define __CROS_EC_PWM_H
/* The values are defined in board.h */
enum pwm_channel;
/**
* Enable/disable a PWM channel.
*/
void pwm_enable(enum pwm_channel ch, int enabled);
/**
* Get PWM channel enabled status.
*/
int pwm_get_enabled(enum pwm_channel ch);
/**
* Set PWM channel duty cycle (0-100).
*/
void pwm_set_duty(enum pwm_channel ch, int percent);
/**
* Get PWM channel duty cycle.
*/
int pwm_get_duty(enum pwm_channel ch);
/* Flags for PWM config table */
/**
* PWM output signal is inverted, so 100% duty means always low
*/
#define PWM_CONFIG_ACTIVE_LOW (1 << 0)
/**
* PWM channel has a fan controller with a tach input and can auto-adjust
* its duty cycle to produce a given fan RPM.
*/
#define PWM_CONFIG_HAS_RPM_MODE (1 << 1)
#endif /* __CROS_EC_PWM_H */
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