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