fdt_regulator.c revision 1.2.2.3
1 1.2.2.3 skrll /* $NetBSD: fdt_regulator.c,v 1.2.2.3 2017/08/28 17:52:02 skrll Exp $ */ 2 1.2.2.2 skrll 3 1.2.2.2 skrll /*- 4 1.2.2.2 skrll * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca> 5 1.2.2.2 skrll * All rights reserved. 6 1.2.2.2 skrll * 7 1.2.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 skrll * modification, are permitted provided that the following conditions 9 1.2.2.2 skrll * are met: 10 1.2.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.2.2.2 skrll * 16 1.2.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.2.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.2.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.2.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.2.2 skrll * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.2.2 skrll * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.2.2 skrll * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.2.2 skrll * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 skrll * SUCH DAMAGE. 27 1.2.2.2 skrll */ 28 1.2.2.2 skrll 29 1.2.2.2 skrll #include <sys/cdefs.h> 30 1.2.2.3 skrll __KERNEL_RCSID(0, "$NetBSD: fdt_regulator.c,v 1.2.2.3 2017/08/28 17:52:02 skrll Exp $"); 31 1.2.2.2 skrll 32 1.2.2.2 skrll #include <sys/param.h> 33 1.2.2.2 skrll #include <sys/bus.h> 34 1.2.2.2 skrll #include <sys/kmem.h> 35 1.2.2.2 skrll 36 1.2.2.2 skrll #include <libfdt.h> 37 1.2.2.2 skrll #include <dev/fdt/fdtvar.h> 38 1.2.2.2 skrll 39 1.2.2.2 skrll struct fdtbus_regulator_controller { 40 1.2.2.2 skrll device_t rc_dev; 41 1.2.2.2 skrll int rc_phandle; 42 1.2.2.2 skrll const struct fdtbus_regulator_controller_func *rc_funcs; 43 1.2.2.2 skrll 44 1.2.2.2 skrll struct fdtbus_regulator_controller *rc_next; 45 1.2.2.2 skrll }; 46 1.2.2.2 skrll 47 1.2.2.2 skrll static struct fdtbus_regulator_controller *fdtbus_rc = NULL; 48 1.2.2.2 skrll 49 1.2.2.2 skrll int 50 1.2.2.2 skrll fdtbus_register_regulator_controller(device_t dev, int phandle, 51 1.2.2.2 skrll const struct fdtbus_regulator_controller_func *funcs) 52 1.2.2.2 skrll { 53 1.2.2.2 skrll struct fdtbus_regulator_controller *rc; 54 1.2.2.2 skrll 55 1.2.2.2 skrll rc = kmem_alloc(sizeof(*rc), KM_SLEEP); 56 1.2.2.2 skrll rc->rc_dev = dev; 57 1.2.2.2 skrll rc->rc_phandle = phandle; 58 1.2.2.2 skrll rc->rc_funcs = funcs; 59 1.2.2.2 skrll 60 1.2.2.2 skrll rc->rc_next = fdtbus_rc; 61 1.2.2.2 skrll fdtbus_rc = rc; 62 1.2.2.2 skrll 63 1.2.2.2 skrll return 0; 64 1.2.2.2 skrll } 65 1.2.2.2 skrll 66 1.2.2.2 skrll static struct fdtbus_regulator_controller * 67 1.2.2.2 skrll fdtbus_get_regulator_controller(int phandle) 68 1.2.2.2 skrll { 69 1.2.2.2 skrll struct fdtbus_regulator_controller *rc; 70 1.2.2.2 skrll 71 1.2.2.2 skrll for (rc = fdtbus_rc; rc; rc = rc->rc_next) { 72 1.2.2.2 skrll if (rc->rc_phandle == phandle) { 73 1.2.2.2 skrll return rc; 74 1.2.2.2 skrll } 75 1.2.2.2 skrll } 76 1.2.2.2 skrll 77 1.2.2.2 skrll return NULL; 78 1.2.2.2 skrll } 79 1.2.2.2 skrll 80 1.2.2.2 skrll struct fdtbus_regulator * 81 1.2.2.2 skrll fdtbus_regulator_acquire(int phandle, const char *prop) 82 1.2.2.2 skrll { 83 1.2.2.2 skrll struct fdtbus_regulator_controller *rc; 84 1.2.2.2 skrll struct fdtbus_regulator *reg; 85 1.2.2.2 skrll int regulator_phandle; 86 1.2.2.2 skrll int error; 87 1.2.2.2 skrll 88 1.2.2.2 skrll regulator_phandle = fdtbus_get_phandle(phandle, prop); 89 1.2.2.2 skrll if (regulator_phandle == -1) { 90 1.2.2.2 skrll return NULL; 91 1.2.2.2 skrll } 92 1.2.2.2 skrll 93 1.2.2.2 skrll rc = fdtbus_get_regulator_controller(regulator_phandle); 94 1.2.2.2 skrll if (rc == NULL) { 95 1.2.2.2 skrll return NULL; 96 1.2.2.2 skrll } 97 1.2.2.2 skrll 98 1.2.2.2 skrll error = rc->rc_funcs->acquire(rc->rc_dev); 99 1.2.2.2 skrll if (error) { 100 1.2.2.2 skrll return NULL; 101 1.2.2.2 skrll } 102 1.2.2.2 skrll 103 1.2.2.2 skrll reg = kmem_alloc(sizeof(*reg), KM_SLEEP); 104 1.2.2.2 skrll reg->reg_rc = rc; 105 1.2.2.2 skrll 106 1.2.2.2 skrll return reg; 107 1.2.2.2 skrll } 108 1.2.2.2 skrll 109 1.2.2.2 skrll void 110 1.2.2.2 skrll fdtbus_regulator_release(struct fdtbus_regulator *reg) 111 1.2.2.2 skrll { 112 1.2.2.2 skrll struct fdtbus_regulator_controller *rc = reg->reg_rc; 113 1.2.2.2 skrll 114 1.2.2.2 skrll rc->rc_funcs->release(rc->rc_dev); 115 1.2.2.2 skrll 116 1.2.2.2 skrll kmem_free(reg, sizeof(*reg)); 117 1.2.2.2 skrll } 118 1.2.2.2 skrll 119 1.2.2.2 skrll int 120 1.2.2.2 skrll fdtbus_regulator_enable(struct fdtbus_regulator *reg) 121 1.2.2.2 skrll { 122 1.2.2.2 skrll struct fdtbus_regulator_controller *rc = reg->reg_rc; 123 1.2.2.2 skrll 124 1.2.2.2 skrll return rc->rc_funcs->enable(rc->rc_dev, true); 125 1.2.2.2 skrll } 126 1.2.2.2 skrll 127 1.2.2.2 skrll int 128 1.2.2.2 skrll fdtbus_regulator_disable(struct fdtbus_regulator *reg) 129 1.2.2.2 skrll { 130 1.2.2.2 skrll struct fdtbus_regulator_controller *rc = reg->reg_rc; 131 1.2.2.2 skrll 132 1.2.2.2 skrll return rc->rc_funcs->enable(rc->rc_dev, false); 133 1.2.2.2 skrll } 134 1.2.2.3 skrll 135 1.2.2.3 skrll int 136 1.2.2.3 skrll fdtbus_regulator_set_voltage(struct fdtbus_regulator *reg, u_int min_uvol, 137 1.2.2.3 skrll u_int max_uvol) 138 1.2.2.3 skrll { 139 1.2.2.3 skrll struct fdtbus_regulator_controller *rc = reg->reg_rc; 140 1.2.2.3 skrll 141 1.2.2.3 skrll if (rc->rc_funcs->set_voltage == NULL) 142 1.2.2.3 skrll return EINVAL; 143 1.2.2.3 skrll 144 1.2.2.3 skrll return rc->rc_funcs->set_voltage(rc->rc_dev, min_uvol, max_uvol); 145 1.2.2.3 skrll } 146 1.2.2.3 skrll 147 1.2.2.3 skrll int 148 1.2.2.3 skrll fdtbus_regulator_get_voltage(struct fdtbus_regulator *reg, u_int *puvol) 149 1.2.2.3 skrll { 150 1.2.2.3 skrll struct fdtbus_regulator_controller *rc = reg->reg_rc; 151 1.2.2.3 skrll 152 1.2.2.3 skrll if (rc->rc_funcs->set_voltage == NULL) 153 1.2.2.3 skrll return EINVAL; 154 1.2.2.3 skrll 155 1.2.2.3 skrll return rc->rc_funcs->get_voltage(rc->rc_dev, puvol); 156 1.2.2.3 skrll } 157
Indexes created Tue Oct 07 21:09:53 GMT 2025