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(®->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(®->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