fdt_regulator.c revision 1.4.2.2
1 1.4.2.2 jdolecek /* $NetBSD: fdt_regulator.c,v 1.4.2.2 2017/12/03 11:37:01 jdolecek Exp $ */ 2 1.4.2.2 jdolecek 3 1.4.2.2 jdolecek /*- 4 1.4.2.2 jdolecek * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca> 5 1.4.2.2 jdolecek * All rights reserved. 6 1.4.2.2 jdolecek * 7 1.4.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 8 1.4.2.2 jdolecek * modification, are permitted provided that the following conditions 9 1.4.2.2 jdolecek * are met: 10 1.4.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 11 1.4.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 12 1.4.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 13 1.4.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 14 1.4.2.2 jdolecek * documentation and/or other materials provided with the distribution. 15 1.4.2.2 jdolecek * 16 1.4.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.4.2.2 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.4.2.2 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.4.2.2 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.4.2.2 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.4.2.2 jdolecek * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.4.2.2 jdolecek * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.4.2.2 jdolecek * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.4.2.2 jdolecek * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.4.2.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.4.2.2 jdolecek * SUCH DAMAGE. 27 1.4.2.2 jdolecek */ 28 1.4.2.2 jdolecek 29 1.4.2.2 jdolecek #include <sys/cdefs.h> 30 1.4.2.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: fdt_regulator.c,v 1.4.2.2 2017/12/03 11:37:01 jdolecek Exp $"); 31 1.4.2.2 jdolecek 32 1.4.2.2 jdolecek #include <sys/param.h> 33 1.4.2.2 jdolecek #include <sys/bus.h> 34 1.4.2.2 jdolecek #include <sys/kmem.h> 35 1.4.2.2 jdolecek 36 1.4.2.2 jdolecek #include <libfdt.h> 37 1.4.2.2 jdolecek #include <dev/fdt/fdtvar.h> 38 1.4.2.2 jdolecek 39 1.4.2.2 jdolecek struct fdtbus_regulator_controller { 40 1.4.2.2 jdolecek device_t rc_dev; 41 1.4.2.2 jdolecek int rc_phandle; 42 1.4.2.2 jdolecek const struct fdtbus_regulator_controller_func *rc_funcs; 43 1.4.2.2 jdolecek 44 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc_next; 45 1.4.2.2 jdolecek }; 46 1.4.2.2 jdolecek 47 1.4.2.2 jdolecek static struct fdtbus_regulator_controller *fdtbus_rc = NULL; 48 1.4.2.2 jdolecek 49 1.4.2.2 jdolecek int 50 1.4.2.2 jdolecek fdtbus_register_regulator_controller(device_t dev, int phandle, 51 1.4.2.2 jdolecek const struct fdtbus_regulator_controller_func *funcs) 52 1.4.2.2 jdolecek { 53 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc; 54 1.4.2.2 jdolecek 55 1.4.2.2 jdolecek rc = kmem_alloc(sizeof(*rc), KM_SLEEP); 56 1.4.2.2 jdolecek rc->rc_dev = dev; 57 1.4.2.2 jdolecek rc->rc_phandle = phandle; 58 1.4.2.2 jdolecek rc->rc_funcs = funcs; 59 1.4.2.2 jdolecek 60 1.4.2.2 jdolecek rc->rc_next = fdtbus_rc; 61 1.4.2.2 jdolecek fdtbus_rc = rc; 62 1.4.2.2 jdolecek 63 1.4.2.2 jdolecek return 0; 64 1.4.2.2 jdolecek } 65 1.4.2.2 jdolecek 66 1.4.2.2 jdolecek static struct fdtbus_regulator_controller * 67 1.4.2.2 jdolecek fdtbus_get_regulator_controller(int phandle) 68 1.4.2.2 jdolecek { 69 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc; 70 1.4.2.2 jdolecek 71 1.4.2.2 jdolecek for (rc = fdtbus_rc; rc; rc = rc->rc_next) { 72 1.4.2.2 jdolecek if (rc->rc_phandle == phandle) { 73 1.4.2.2 jdolecek return rc; 74 1.4.2.2 jdolecek } 75 1.4.2.2 jdolecek } 76 1.4.2.2 jdolecek 77 1.4.2.2 jdolecek return NULL; 78 1.4.2.2 jdolecek } 79 1.4.2.2 jdolecek 80 1.4.2.2 jdolecek struct fdtbus_regulator * 81 1.4.2.2 jdolecek fdtbus_regulator_acquire(int phandle, const char *prop) 82 1.4.2.2 jdolecek { 83 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc; 84 1.4.2.2 jdolecek struct fdtbus_regulator *reg; 85 1.4.2.2 jdolecek int regulator_phandle; 86 1.4.2.2 jdolecek int error; 87 1.4.2.2 jdolecek 88 1.4.2.2 jdolecek regulator_phandle = fdtbus_get_phandle(phandle, prop); 89 1.4.2.2 jdolecek if (regulator_phandle == -1) { 90 1.4.2.2 jdolecek return NULL; 91 1.4.2.2 jdolecek } 92 1.4.2.2 jdolecek 93 1.4.2.2 jdolecek rc = fdtbus_get_regulator_controller(regulator_phandle); 94 1.4.2.2 jdolecek if (rc == NULL) { 95 1.4.2.2 jdolecek return NULL; 96 1.4.2.2 jdolecek } 97 1.4.2.2 jdolecek 98 1.4.2.2 jdolecek error = rc->rc_funcs->acquire(rc->rc_dev); 99 1.4.2.2 jdolecek if (error) { 100 1.4.2.2 jdolecek aprint_error_dev(rc->rc_dev, "failed to acquire regulator: %d\n", error); 101 1.4.2.2 jdolecek return NULL; 102 1.4.2.2 jdolecek } 103 1.4.2.2 jdolecek 104 1.4.2.2 jdolecek reg = kmem_alloc(sizeof(*reg), KM_SLEEP); 105 1.4.2.2 jdolecek reg->reg_rc = rc; 106 1.4.2.2 jdolecek 107 1.4.2.2 jdolecek return reg; 108 1.4.2.2 jdolecek } 109 1.4.2.2 jdolecek 110 1.4.2.2 jdolecek void 111 1.4.2.2 jdolecek fdtbus_regulator_release(struct fdtbus_regulator *reg) 112 1.4.2.2 jdolecek { 113 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc = reg->reg_rc; 114 1.4.2.2 jdolecek 115 1.4.2.2 jdolecek rc->rc_funcs->release(rc->rc_dev); 116 1.4.2.2 jdolecek 117 1.4.2.2 jdolecek kmem_free(reg, sizeof(*reg)); 118 1.4.2.2 jdolecek } 119 1.4.2.2 jdolecek 120 1.4.2.2 jdolecek int 121 1.4.2.2 jdolecek fdtbus_regulator_enable(struct fdtbus_regulator *reg) 122 1.4.2.2 jdolecek { 123 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc = reg->reg_rc; 124 1.4.2.2 jdolecek 125 1.4.2.2 jdolecek return rc->rc_funcs->enable(rc->rc_dev, true); 126 1.4.2.2 jdolecek } 127 1.4.2.2 jdolecek 128 1.4.2.2 jdolecek int 129 1.4.2.2 jdolecek fdtbus_regulator_disable(struct fdtbus_regulator *reg) 130 1.4.2.2 jdolecek { 131 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc = reg->reg_rc; 132 1.4.2.2 jdolecek 133 1.4.2.2 jdolecek return rc->rc_funcs->enable(rc->rc_dev, false); 134 1.4.2.2 jdolecek } 135 1.4.2.2 jdolecek 136 1.4.2.2 jdolecek int 137 1.4.2.2 jdolecek fdtbus_regulator_set_voltage(struct fdtbus_regulator *reg, u_int min_uvol, 138 1.4.2.2 jdolecek u_int max_uvol) 139 1.4.2.2 jdolecek { 140 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc = reg->reg_rc; 141 1.4.2.2 jdolecek 142 1.4.2.2 jdolecek if (rc->rc_funcs->set_voltage == NULL) 143 1.4.2.2 jdolecek return EINVAL; 144 1.4.2.2 jdolecek 145 1.4.2.2 jdolecek return rc->rc_funcs->set_voltage(rc->rc_dev, min_uvol, max_uvol); 146 1.4.2.2 jdolecek } 147 1.4.2.2 jdolecek 148 1.4.2.2 jdolecek int 149 1.4.2.2 jdolecek fdtbus_regulator_get_voltage(struct fdtbus_regulator *reg, u_int *puvol) 150 1.4.2.2 jdolecek { 151 1.4.2.2 jdolecek struct fdtbus_regulator_controller *rc = reg->reg_rc; 152 1.4.2.2 jdolecek 153 1.4.2.2 jdolecek if (rc->rc_funcs->set_voltage == NULL) 154 1.4.2.2 jdolecek return EINVAL; 155 1.4.2.2 jdolecek 156 1.4.2.2 jdolecek return rc->rc_funcs->get_voltage(rc->rc_dev, puvol); 157 1.4.2.2 jdolecek } 158
Indexes created Tue Oct 07 21:09:53 GMT 2025