561baae05e
The pwm subsystem consist of API for PWM controllers, pwmbus to register them and a pwm(8) utility to talk to them from userland. Reviewed by: oshgobo (capsicum), bcr (manpage), 0mp (manpage) Differential Revision: https://reviews.freebsd.org/D17938
65 lines
2.3 KiB
C
65 lines
2.3 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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* All rights reserved.
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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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* $FreeBSD$
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*/
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#ifndef _PWMBUS_H_
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#include <dev/ofw/openfirm.h>
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#include <sys/pwm.h>
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struct pwm_channel {
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device_t dev;
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device_t busdev;
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int channel;
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uint64_t period;
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uint64_t duty;
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uint32_t flags;
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bool enabled;
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};
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typedef struct pwm_channel *pwm_channel_t;
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device_t pwmbus_attach_bus(device_t dev);
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int pwmbus_acquire_channel(device_t bus, int channel);
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int pwmbus_release_channel(device_t bus, int channel);
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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 *channel);
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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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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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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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#endif /* _PWMBUS_H_ */
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