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      1  1.5      maya /*	$NetBSD: consumer.h,v 1.5 2018/11/19 10:48:59 maya Exp $	*/
      2  1.1  riastrad 
      3  1.1  riastrad /*-
      4  1.1  riastrad  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  1.1  riastrad  * All rights reserved.
      6  1.1  riastrad  *
      7  1.1  riastrad  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1  riastrad  * by Taylor R. Campbell.
      9  1.1  riastrad  *
     10  1.1  riastrad  * Redistribution and use in source and binary forms, with or without
     11  1.1  riastrad  * modification, are permitted provided that the following conditions
     12  1.1  riastrad  * are met:
     13  1.1  riastrad  * 1. Redistributions of source code must retain the above copyright
     14  1.1  riastrad  *    notice, this list of conditions and the following disclaimer.
     15  1.1  riastrad  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1  riastrad  *    notice, this list of conditions and the following disclaimer in the
     17  1.1  riastrad  *    documentation and/or other materials provided with the distribution.
     18  1.1  riastrad  *
     19  1.1  riastrad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1  riastrad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1  riastrad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1  riastrad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1  riastrad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1  riastrad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1  riastrad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1  riastrad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1  riastrad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1  riastrad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1  riastrad  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1  riastrad  */
     31  1.1  riastrad 
     32  1.1  riastrad #ifndef	_LINUX_REGULATOR_CONSUMER_H_
     33  1.1  riastrad #define	_LINUX_REGULATOR_CONSUMER_H_
     34  1.1  riastrad 
     35  1.3  riastrad #ifdef _KERNEL_OPT
     36  1.2  riastrad #include "opt_fdt.h"
     37  1.3  riastrad #endif
     38  1.2  riastrad 
     39  1.2  riastrad #ifdef FDT
     40  1.2  riastrad 
     41  1.5      maya #include <machine/limits.h>
     42  1.4  riastrad #include <dev/fdt/fdtvar.h>
     43  1.4  riastrad 
     44  1.2  riastrad struct regulator {
     45  1.2  riastrad 	struct fdtbus_regulator	regulator;
     46  1.2  riastrad };
     47  1.2  riastrad 
     48  1.2  riastrad static inline int
     49  1.2  riastrad regulator_get_voltage(struct regulator *reg)
     50  1.2  riastrad {
     51  1.2  riastrad 	unsigned uvolt;
     52  1.2  riastrad 	int error;
     53  1.2  riastrad 
     54  1.2  riastrad 	error = fdtbus_regulator_get_voltage(&reg->regulator, &uvolt);
     55  1.2  riastrad 	if (error) {
     56  1.2  riastrad 		/* XXX errno NetBSD->Linux */
     57  1.2  riastrad 		KASSERTMSG(error > 0, "negative error: %d", error);
     58  1.2  riastrad 		return -error;
     59  1.2  riastrad 	}
     60  1.2  riastrad 
     61  1.2  riastrad 	KASSERTMSG(uvolt <= INT_MAX, "high voltage: %u uV", uvolt);
     62  1.4  riastrad 	return (int)uvolt;
     63  1.2  riastrad }
     64  1.2  riastrad 
     65  1.2  riastrad static inline int
     66  1.2  riastrad regulator_set_voltage(struct regulator *reg, int min_uvolt, int max_uvolt)
     67  1.2  riastrad {
     68  1.2  riastrad 
     69  1.2  riastrad 	if (min_uvolt < 0 || max_uvolt < 0)
     70  1.2  riastrad 		return -EINVAL;
     71  1.2  riastrad 
     72  1.2  riastrad 	/* XXX errno NetBSD->Linux */
     73  1.2  riastrad 	return -fdtbus_regulator_set_voltage(&reg->regulator, min_uvolt,
     74  1.2  riastrad 	    max_uvolt);
     75  1.2  riastrad }
     76  1.2  riastrad 
     77  1.2  riastrad #else
     78  1.2  riastrad 
     79  1.2  riastrad struct regulator;
     80  1.2  riastrad 
     81  1.2  riastrad static inline int
     82  1.2  riastrad regulator_get_voltage(struct regulator *reg)
     83  1.2  riastrad {
     84  1.2  riastrad 	panic("no voltage regulators here");
     85  1.2  riastrad }
     86  1.2  riastrad 
     87  1.2  riastrad static inline int
     88  1.2  riastrad regulator_set_voltage(struct regulator *reg, int min_uvolt, int max_uvolt)
     89  1.2  riastrad {
     90  1.2  riastrad 	panic("no voltage regulators here");
     91  1.2  riastrad }
     92  1.2  riastrad 
     93  1.2  riastrad 
     94  1.2  riastrad #endif
     95  1.2  riastrad 
     96  1.1  riastrad #endif	/* _LINUX_REGULATOR_CONSUMER_H_ */
     97