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/* Copyright 2012 The ChromiumOS Authors
* 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
#include "util.h"
#include <inttypes.h>
#define PWM_RAW_TO_PERCENT(v) DIV_ROUND_NEAREST((uint32_t)(v)*100, UINT16_MAX)
#define PWM_PERCENT_TO_RAW(v) ((uint32_t)(v)*UINT16_MAX / 100)
/* 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 (0-65535).
*/
void pwm_set_raw_duty(enum pwm_channel ch, uint16_t duty);
/**
* Get PWM channel duty cycle.
*/
uint16_t pwm_get_raw_duty(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 BIT(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 BIT(1)
/**
* PWM clock select alternate source. The actual clock and alternate
* source are chip dependent.
*/
#define PWM_CONFIG_ALT_CLOCK BIT(2)
/**
* PWM channel has a complementary output signal which should be enabled in
* addition to the primary output.
*/
#define PWM_CONFIG_COMPLEMENTARY_OUTPUT BIT(3)
/**
* PWM channel must stay active in low-power idle, if enabled.
*/
#define PWM_CONFIG_DSLEEP BIT(4)
/**
* PWM channel's IO type is open-drain, if enabled. (default IO is push-pull.)
*/
#define PWM_CONFIG_OPEN_DRAIN BIT(5)
#endif /* __CROS_EC_PWM_H */
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