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      1 /* $NetBSD: pwm.c,v 1.1 2018/05/06 10:32:33 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2018 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: pwm.c,v 1.1 2018/05/06 10:32:33 jmcneill Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/device.h>
     35 
     36 #include <dev/pwm/pwmvar.h>
     37 
     38 int
     39 pwm_enable(pwm_tag_t pwm)
     40 {
     41 	return pwm->pwm_enable(pwm, true);
     42 }
     43 
     44 int
     45 pwm_disable(pwm_tag_t pwm)
     46 {
     47 	return pwm->pwm_enable(pwm, false);
     48 }
     49 
     50 int
     51 pwm_get_config(pwm_tag_t pwm, struct pwm_config *conf)
     52 {
     53 	return pwm->pwm_get_config(pwm, conf);
     54 }
     55 
     56 int
     57 pwm_set_config(pwm_tag_t pwm, const struct pwm_config *conf)
     58 {
     59 	if (conf->period < conf->duty_cycle)
     60 		return EINVAL;
     61 
     62 	return pwm->pwm_set_config(pwm, conf);
     63 }
     64