/* $NetBSD: pwmvar.h,v 1.1 2018/05/06 10:32:33 jmcneill Exp $ */
/*-
* Copyright (c) 2018 Jared McNeill <
[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _DEV_PWM_PWMVAR_H
#define _DEV_PWM_PWMVAR_H
enum pwm_polarity {
PWM_ACTIVE_HIGH,
PWM_ACTIVE_LOW
};
struct pwm_config {
u_int period; /* nanoseconds */
u_int duty_cycle; /* nanoseconds */
enum pwm_polarity polarity; /* PWM_ACTIVE_{HIGH,LOW} */
};
typedef struct pwm_controller {
int (*pwm_enable)(struct pwm_controller *, bool);
int (*pwm_get_config)(struct pwm_controller *,
struct pwm_config *);
int (*pwm_set_config)(struct pwm_controller *,
const struct pwm_config *);
device_t pwm_dev; /* device */
void *pwm_priv; /* driver private data */
} *pwm_tag_t;
int pwm_enable(pwm_tag_t);
int pwm_disable(pwm_tag_t);
int pwm_get_config(pwm_tag_t, struct pwm_config *);
int pwm_set_config(pwm_tag_t, const struct pwm_config *);
#endif /* _DEV_PWM_PWMVAR_H */
