2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/resource.h>
37 #include <dev/ofw/ofw_bus.h>
38 #include <dev/ofw/ofw_bus_subr.h>
40 #include <dev/pwm/ofw_pwm.h>
43 pwm_get_by_ofw_propidx(device_t consumer, phandle_t node,
44 const char *prop_name, int idx, pwm_channel_t *out_channel)
48 struct pwm_channel channel;
51 rv = ofw_bus_parse_xref_list_alloc(node, prop_name, "#pwm-cells",
52 idx, &xref, &ncells, &cells);
56 channel.dev = OF_device_from_xref(xref);
57 if (channel.dev == NULL) {
62 channel.channel = cells[0];
63 channel.period = cells[1];
66 channel.flags = cells[2];
68 *out_channel = malloc(sizeof(struct pwm_channel), M_DEVBUF, M_WAITOK | M_ZERO);
69 **out_channel = channel;
74 pwm_get_by_ofw_idx(device_t consumer, phandle_t node, int idx,
75 pwm_channel_t *out_channel)
78 return (pwm_get_by_ofw_propidx(consumer, node, "pwms", idx, out_channel));
82 pwm_get_by_ofw_property(device_t consumer, phandle_t node,
83 const char *prop_name, pwm_channel_t *out_channel)
86 return (pwm_get_by_ofw_propidx(consumer, node, prop_name, 0, out_channel));
90 pwm_get_by_ofw_name(device_t consumer, phandle_t node, const char *name,
91 pwm_channel_t *out_channel)
95 rv = ofw_bus_find_string_index(node, "pwm-names", name, &idx);
99 return (pwm_get_by_ofw_idx(consumer, node, idx, out_channel));