pwmbus.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2019 Ian Lepore <ian@FreeBSD.org>
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    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.
   14  *
   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
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD$
   28  */
   29 
   30 #ifndef _PWMBUS_H_
   31 #define _PWMBUS_H_
   32 
   33 struct pwmbus_softc {
   34         device_t        dev;
   35         u_int           nchannels;
   36 };
   37 
   38 struct pwmbus_ivars {
   39         u_int   pi_channel;
   40 };
   41 
   42 enum {
   43         PWMBUS_IVAR_CHANNEL,    /* Channel used by child dev */
   44 };
   45 
   46 #define PWMBUS_ACCESSOR(A, B, T)                                        \
   47 static inline int                                                       \
   48 pwmbus_get_ ## A(device_t dev, T *t)                                    \
   49 {                                                                       \
   50         return BUS_READ_IVAR(device_get_parent(dev), dev,               \
   51             PWMBUS_IVAR_ ## B, (uintptr_t *) t);                        \
   52 }                                                                       \
   53 static inline int                                                       \
   54 pwmbus_set_ ## A(device_t dev, T t)                                     \
   55 {                                                                       \
   56         return BUS_WRITE_IVAR(device_get_parent(dev), dev,              \
   57             PWMBUS_IVAR_ ## B, (uintptr_t) t);                          \
   58 }
   59 
   60 PWMBUS_ACCESSOR(channel, CHANNEL, u_int)
   61 
   62 #ifdef FDT
   63 #define PWMBUS_FDT_PNP_INFO(t)  FDTCOMPAT_PNP_INFO(t, pwmbus)
   64 #else
   65 #define PWMBUS_FDT_PNP_INFO(t)
   66 #endif
   67 
   68 extern driver_t   pwmbus_driver;
   69 extern driver_t   ofw_pwmbus_driver;
   70 
   71 #endif /* _PWMBUS_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/pwm/pwmbus.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/pwm/pwmbus.h