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