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      1 /*	$NetBSD: consumer.h,v 1.5 2018/11/19 10:48:59 maya Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef	_LINUX_REGULATOR_CONSUMER_H_
     33 #define	_LINUX_REGULATOR_CONSUMER_H_
     34 
     35 #ifdef _KERNEL_OPT
     36 #include "opt_fdt.h"
     37 #endif
     38 
     39 #ifdef FDT
     40 
     41 #include <machine/limits.h>
     42 #include <dev/fdt/fdtvar.h>
     43 
     44 struct regulator {
     45 	struct fdtbus_regulator	regulator;
     46 };
     47 
     48 static inline int
     49 regulator_get_voltage(struct regulator *reg)
     50 {
     51 	unsigned uvolt;
     52 	int error;
     53 
     54 	error = fdtbus_regulator_get_voltage(&reg->regulator, &uvolt);
     55 	if (error) {
     56 		/* XXX errno NetBSD->Linux */
     57 		KASSERTMSG(error > 0, "negative error: %d", error);
     58 		return -error;
     59 	}
     60 
     61 	KASSERTMSG(uvolt <= INT_MAX, "high voltage: %u uV", uvolt);
     62 	return (int)uvolt;
     63 }
     64 
     65 static inline int
     66 regulator_set_voltage(struct regulator *reg, int min_uvolt, int max_uvolt)
     67 {
     68 
     69 	if (min_uvolt < 0 || max_uvolt < 0)
     70 		return -EINVAL;
     71 
     72 	/* XXX errno NetBSD->Linux */
     73 	return -fdtbus_regulator_set_voltage(&reg->regulator, min_uvolt,
     74 	    max_uvolt);
     75 }
     76 
     77 #else
     78 
     79 struct regulator;
     80 
     81 static inline int
     82 regulator_get_voltage(struct regulator *reg)
     83 {
     84 	panic("no voltage regulators here");
     85 }
     86 
     87 static inline int
     88 regulator_set_voltage(struct regulator *reg, int min_uvolt, int max_uvolt)
     89 {
     90 	panic("no voltage regulators here");
     91 }
     92 
     93 
     94 #endif
     95 
     96 #endif	/* _LINUX_REGULATOR_CONSUMER_H_ */
     97