1*2a22daa1Sjmcneill /* $NetBSD: pwm.c,v 1.1 2018/05/06 10:32:33 jmcneill Exp $ */
2*2a22daa1Sjmcneill
3*2a22daa1Sjmcneill /*-
4*2a22daa1Sjmcneill * Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
5*2a22daa1Sjmcneill * All rights reserved.
6*2a22daa1Sjmcneill *
7*2a22daa1Sjmcneill * Redistribution and use in source and binary forms, with or without
8*2a22daa1Sjmcneill * modification, are permitted provided that the following conditions
9*2a22daa1Sjmcneill * are met:
10*2a22daa1Sjmcneill * 1. Redistributions of source code must retain the above copyright
11*2a22daa1Sjmcneill * notice, this list of conditions and the following disclaimer.
12*2a22daa1Sjmcneill * 2. Redistributions in binary form must reproduce the above copyright
13*2a22daa1Sjmcneill * notice, this list of conditions and the following disclaimer in the
14*2a22daa1Sjmcneill * documentation and/or other materials provided with the distribution.
15*2a22daa1Sjmcneill *
16*2a22daa1Sjmcneill * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17*2a22daa1Sjmcneill * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18*2a22daa1Sjmcneill * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19*2a22daa1Sjmcneill * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20*2a22daa1Sjmcneill * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21*2a22daa1Sjmcneill * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22*2a22daa1Sjmcneill * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23*2a22daa1Sjmcneill * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24*2a22daa1Sjmcneill * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25*2a22daa1Sjmcneill * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26*2a22daa1Sjmcneill * SUCH DAMAGE.
27*2a22daa1Sjmcneill */
28*2a22daa1Sjmcneill
29*2a22daa1Sjmcneill #include <sys/cdefs.h>
30*2a22daa1Sjmcneill __KERNEL_RCSID(0, "$NetBSD: pwm.c,v 1.1 2018/05/06 10:32:33 jmcneill Exp $");
31*2a22daa1Sjmcneill
32*2a22daa1Sjmcneill #include <sys/param.h>
33*2a22daa1Sjmcneill #include <sys/systm.h>
34*2a22daa1Sjmcneill #include <sys/device.h>
35*2a22daa1Sjmcneill
36*2a22daa1Sjmcneill #include <dev/pwm/pwmvar.h>
37*2a22daa1Sjmcneill
38*2a22daa1Sjmcneill int
pwm_enable(pwm_tag_t pwm)39*2a22daa1Sjmcneill pwm_enable(pwm_tag_t pwm)
40*2a22daa1Sjmcneill {
41*2a22daa1Sjmcneill return pwm->pwm_enable(pwm, true);
42*2a22daa1Sjmcneill }
43*2a22daa1Sjmcneill
44*2a22daa1Sjmcneill int
pwm_disable(pwm_tag_t pwm)45*2a22daa1Sjmcneill pwm_disable(pwm_tag_t pwm)
46*2a22daa1Sjmcneill {
47*2a22daa1Sjmcneill return pwm->pwm_enable(pwm, false);
48*2a22daa1Sjmcneill }
49*2a22daa1Sjmcneill
50*2a22daa1Sjmcneill int
pwm_get_config(pwm_tag_t pwm,struct pwm_config * conf)51*2a22daa1Sjmcneill pwm_get_config(pwm_tag_t pwm, struct pwm_config *conf)
52*2a22daa1Sjmcneill {
53*2a22daa1Sjmcneill return pwm->pwm_get_config(pwm, conf);
54*2a22daa1Sjmcneill }
55*2a22daa1Sjmcneill
56*2a22daa1Sjmcneill int
pwm_set_config(pwm_tag_t pwm,const struct pwm_config * conf)57*2a22daa1Sjmcneill pwm_set_config(pwm_tag_t pwm, const struct pwm_config *conf)
58*2a22daa1Sjmcneill {
59*2a22daa1Sjmcneill if (conf->period < conf->duty_cycle)
60*2a22daa1Sjmcneill return EINVAL;
61*2a22daa1Sjmcneill
62*2a22daa1Sjmcneill return pwm->pwm_set_config(pwm, conf);
63*2a22daa1Sjmcneill }
64