1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org> 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, 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 * $FreeBSD$ 29 */ 30 31 #ifndef _PWMBUS_H_ 32 33 #include <dev/ofw/openfirm.h> 34 #include <sys/pwm.h> 35 36 struct pwm_channel { 37 device_t dev; 38 device_t busdev; 39 int channel; 40 uint64_t period; 41 uint64_t duty; 42 uint32_t flags; 43 bool enabled; 44 }; 45 typedef struct pwm_channel *pwm_channel_t; 46 47 device_t pwmbus_attach_bus(device_t dev); 48 int pwmbus_acquire_channel(device_t bus, int channel); 49 int pwmbus_release_channel(device_t bus, int channel); 50 51 int 52 pwm_get_by_ofw_propidx(device_t consumer, phandle_t node, 53 const char *prop_name, int idx, pwm_channel_t *channel); 54 int 55 pwm_get_by_ofw_idx(device_t consumer, phandle_t node, int idx, 56 pwm_channel_t *out_channel); 57 int 58 pwm_get_by_ofw_property(device_t consumer, phandle_t node, 59 const char *prop_name, pwm_channel_t *out_channel); 60 int 61 pwm_get_by_ofw_name(device_t consumer, phandle_t node, const char *name, 62 pwm_channel_t *out_channel); 63 64 #endif /* _PWMBUS_H_ */ 65