2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/resource.h>
38 #include <dev/ofw/ofw_bus.h>
39 #include <dev/ofw/ofw_bus_subr.h>
41 #include <dev/pwm/ofw_pwm.h>
44 pwm_get_by_ofw_propidx(device_t consumer, phandle_t node,
45 const char *prop_name, int idx, pwm_channel_t *out_channel)
49 struct pwm_channel channel;
52 rv = ofw_bus_parse_xref_list_alloc(node, prop_name, "#pwm-cells",
53 idx, &xref, &ncells, &cells);
57 channel.dev = OF_device_from_xref(xref);
58 if (channel.dev == NULL) {
63 channel.channel = cells[0];
64 channel.period = cells[1];
67 channel.flags = cells[2];
69 *out_channel = malloc(sizeof(struct pwm_channel), M_DEVBUF, M_WAITOK | M_ZERO);
70 **out_channel = channel;
75 pwm_get_by_ofw_idx(device_t consumer, phandle_t node, int idx,
76 pwm_channel_t *out_channel)
79 return (pwm_get_by_ofw_propidx(consumer, node, "pwms", idx, out_channel));
83 pwm_get_by_ofw_property(device_t consumer, phandle_t node,
84 const char *prop_name, pwm_channel_t *out_channel)
87 return (pwm_get_by_ofw_propidx(consumer, node, prop_name, 0, out_channel));
91 pwm_get_by_ofw_name(device_t consumer, phandle_t node, const char *name,
92 pwm_channel_t *out_channel)
96 rv = ofw_bus_find_string_index(node, "pwm-names", name, &idx);
100 return (pwm_get_by_ofw_idx(consumer, node, idx, out_channel));