e213223c9b
Some of the files have both me and Jared McNeill and he gave me permission to remove it from his files too.
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/resource.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/pwm/ofw_pwm.h>
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int
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pwm_get_by_ofw_propidx(device_t consumer, phandle_t node,
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const char *prop_name, int idx, pwm_channel_t *out_channel)
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{
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phandle_t xref;
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pcell_t *cells;
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struct pwm_channel channel;
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int ncells, rv;
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rv = ofw_bus_parse_xref_list_alloc(node, prop_name, "#pwm-cells",
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idx, &xref, &ncells, &cells);
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if (rv != 0)
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return (rv);
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channel.dev = OF_device_from_xref(xref);
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if (channel.dev == NULL) {
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OF_prop_free(cells);
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return (ENODEV);
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}
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channel.channel = cells[0];
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channel.period = cells[1];
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if (ncells >= 3)
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channel.flags = cells[2];
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*out_channel = malloc(sizeof(struct pwm_channel), M_DEVBUF, M_WAITOK | M_ZERO);
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**out_channel = channel;
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return (0);
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}
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int
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pwm_get_by_ofw_idx(device_t consumer, phandle_t node, int idx,
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pwm_channel_t *out_channel)
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{
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return (pwm_get_by_ofw_propidx(consumer, node, "pwms", idx, out_channel));
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}
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int
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pwm_get_by_ofw_property(device_t consumer, phandle_t node,
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const char *prop_name, pwm_channel_t *out_channel)
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{
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return (pwm_get_by_ofw_propidx(consumer, node, prop_name, 0, out_channel));
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}
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int
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pwm_get_by_ofw_name(device_t consumer, phandle_t node, const char *name,
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pwm_channel_t *out_channel)
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{
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int rv, idx;
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rv = ofw_bus_find_string_index(node, "pwm-names", name, &idx);
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if (rv != 0)
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return (rv);
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return (pwm_get_by_ofw_idx(consumer, node, idx, out_channel));
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}
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