1 /* $NetBSD: pwmvar.h,v 1.1 2018/05/06 10:32:33 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 Jared McNeill <jmcneill@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 #ifndef _DEV_PWM_PWMVAR_H 30 #define _DEV_PWM_PWMVAR_H 31 32 enum pwm_polarity { 33 PWM_ACTIVE_HIGH, 34 PWM_ACTIVE_LOW 35 }; 36 37 struct pwm_config { 38 u_int period; /* nanoseconds */ 39 u_int duty_cycle; /* nanoseconds */ 40 enum pwm_polarity polarity; /* PWM_ACTIVE_{HIGH,LOW} */ 41 }; 42 43 typedef struct pwm_controller { 44 int (*pwm_enable)(struct pwm_controller *, bool); 45 int (*pwm_get_config)(struct pwm_controller *, 46 struct pwm_config *); 47 int (*pwm_set_config)(struct pwm_controller *, 48 const struct pwm_config *); 49 50 device_t pwm_dev; /* device */ 51 void *pwm_priv; /* driver private data */ 52 } *pwm_tag_t; 53 54 int pwm_enable(pwm_tag_t); 55 int pwm_disable(pwm_tag_t); 56 int pwm_get_config(pwm_tag_t, struct pwm_config *); 57 int pwm_set_config(pwm_tag_t, const struct pwm_config *); 58 59 #endif /* _DEV_PWM_PWMVAR_H */ 60