1 /* 2 * Copyright (C) 2014-2015 Samsung Electronics 3 * Przemyslaw Marczak <p.marczak@samsung.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 #include <common.h> 8 #include <fdtdec.h> 9 #include <errno.h> 10 #include <dm.h> 11 #include <dm/uclass-internal.h> 12 #include <power/pmic.h> 13 #include <power/regulator.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep) 18 { 19 struct dm_regulator_uclass_platdata *uc_pdata; 20 21 *modep = NULL; 22 23 uc_pdata = dev_get_uclass_platdata(dev); 24 if (!uc_pdata) 25 return -ENXIO; 26 27 *modep = uc_pdata->mode; 28 return uc_pdata->mode_count; 29 } 30 31 int regulator_get_value(struct udevice *dev) 32 { 33 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 34 35 if (!ops || !ops->get_value) 36 return -ENOSYS; 37 38 return ops->get_value(dev); 39 } 40 41 int regulator_set_value(struct udevice *dev, int uV) 42 { 43 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 44 45 if (!ops || !ops->set_value) 46 return -ENOSYS; 47 48 return ops->set_value(dev, uV); 49 } 50 51 int regulator_get_current(struct udevice *dev) 52 { 53 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 54 55 if (!ops || !ops->get_current) 56 return -ENOSYS; 57 58 return ops->get_current(dev); 59 } 60 61 int regulator_set_current(struct udevice *dev, int uA) 62 { 63 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 64 65 if (!ops || !ops->set_current) 66 return -ENOSYS; 67 68 return ops->set_current(dev, uA); 69 } 70 71 bool regulator_get_enable(struct udevice *dev) 72 { 73 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 74 75 if (!ops || !ops->get_enable) 76 return -ENOSYS; 77 78 return ops->get_enable(dev); 79 } 80 81 int regulator_set_enable(struct udevice *dev, bool enable) 82 { 83 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 84 85 if (!ops || !ops->set_enable) 86 return -ENOSYS; 87 88 return ops->set_enable(dev, enable); 89 } 90 91 int regulator_get_mode(struct udevice *dev) 92 { 93 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 94 95 if (!ops || !ops->get_mode) 96 return -ENOSYS; 97 98 return ops->get_mode(dev); 99 } 100 101 int regulator_set_mode(struct udevice *dev, int mode) 102 { 103 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 104 105 if (!ops || !ops->set_mode) 106 return -ENOSYS; 107 108 return ops->set_mode(dev, mode); 109 } 110 111 int regulator_by_platname(const char *plat_name, struct udevice **devp) 112 { 113 struct dm_regulator_uclass_platdata *uc_pdata; 114 struct udevice *dev; 115 116 *devp = NULL; 117 118 for (uclass_find_first_device(UCLASS_REGULATOR, &dev); 119 dev; 120 uclass_find_next_device(&dev)) { 121 uc_pdata = dev_get_uclass_platdata(dev); 122 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 123 continue; 124 125 return uclass_get_device_tail(dev, 0, devp); 126 } 127 128 debug("%s: can't find: %s\n", __func__, plat_name); 129 130 return -ENODEV; 131 } 132 133 int regulator_by_devname(const char *devname, struct udevice **devp) 134 { 135 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 136 } 137 138 static int setting_failed(int ret, bool verbose, const char *fmt, ...) 139 { 140 va_list args; 141 char buf[64]; 142 143 if (verbose == false) 144 return ret; 145 146 va_start(args, fmt); 147 vscnprintf(buf, sizeof(buf), fmt, args); 148 va_end(args); 149 150 printf(buf); 151 152 if (!ret) 153 return 0; 154 155 printf(" (ret: %d)", ret); 156 157 return ret; 158 } 159 160 int regulator_by_platname_autoset_and_enable(const char *platname, 161 struct udevice **devp, 162 bool verbose) 163 { 164 struct dm_regulator_uclass_platdata *uc_pdata; 165 struct udevice *dev; 166 bool v = verbose; 167 int ret; 168 169 if (devp) 170 *devp = NULL; 171 172 ret = regulator_by_platname(platname, &dev); 173 if (ret) { 174 error("Can get the regulator: %s!", platname); 175 return ret; 176 } 177 178 uc_pdata = dev_get_uclass_platdata(dev); 179 if (!uc_pdata) { 180 error("Can get the regulator %s uclass platdata!", platname); 181 return -ENXIO; 182 } 183 184 if (v) 185 printf("%s@%s: ", dev->name, uc_pdata->name); 186 187 /* Those values are optional (-ENODATA if unset) */ 188 if ((uc_pdata->min_uV != -ENODATA) && 189 (uc_pdata->max_uV != -ENODATA) && 190 (uc_pdata->min_uV == uc_pdata->max_uV)) { 191 ret = regulator_set_value(dev, uc_pdata->min_uV); 192 if (setting_failed(ret, v, "set %d uV", uc_pdata->min_uV)) 193 goto exit; 194 } 195 196 /* Those values are optional (-ENODATA if unset) */ 197 if ((uc_pdata->min_uA != -ENODATA) && 198 (uc_pdata->max_uA != -ENODATA) && 199 (uc_pdata->min_uA == uc_pdata->max_uA)) { 200 ret = regulator_set_current(dev, uc_pdata->min_uA); 201 if (setting_failed(ret, v, "; set %d uA", uc_pdata->min_uA)) 202 goto exit; 203 } 204 205 if (!uc_pdata->always_on && !uc_pdata->boot_on) 206 goto retdev; 207 208 ret = regulator_set_enable(dev, true); 209 if (setting_failed(ret, v, "; enabling", uc_pdata->min_uA)) 210 goto exit; 211 212 retdev: 213 if (devp) 214 *devp = dev; 215 exit: 216 if (v) 217 printf("\n"); 218 return ret; 219 } 220 221 int regulator_by_platname_list_autoset_and_enable(const char *list_platname[], 222 int list_entries, 223 struct udevice *list_devp[], 224 bool verbose) 225 { 226 struct udevice *dev; 227 int i, ret, success = 0; 228 229 for (i = 0; i < list_entries; i++) { 230 ret = regulator_autoset(list_platname[i], &dev, verbose); 231 if (!ret) 232 success++; 233 234 if (!list_devp) 235 continue; 236 237 if (ret) 238 list_devp[i] = NULL; 239 else 240 list_devp[i] = dev; 241 } 242 243 return (success != list_entries); 244 } 245 246 static int regulator_post_bind(struct udevice *dev) 247 { 248 struct dm_regulator_uclass_platdata *uc_pdata; 249 int offset = dev->of_offset; 250 const void *blob = gd->fdt_blob; 251 252 uc_pdata = dev_get_uclass_platdata(dev); 253 if (!uc_pdata) 254 return -ENXIO; 255 256 /* Regulator's mandatory constraint */ 257 uc_pdata->name = fdt_getprop(blob, offset, "regulator-name", NULL); 258 if (!uc_pdata->name) { 259 debug("%s: dev: %s has no property 'regulator-name'\n", 260 __func__, dev->name); 261 return -ENXIO; 262 } 263 264 return 0; 265 } 266 267 static int regulator_pre_probe(struct udevice *dev) 268 { 269 struct dm_regulator_uclass_platdata *uc_pdata; 270 int offset = dev->of_offset; 271 272 uc_pdata = dev_get_uclass_platdata(dev); 273 if (!uc_pdata) 274 return -ENXIO; 275 276 /* Regulator's optional constraints */ 277 uc_pdata->min_uV = fdtdec_get_int(gd->fdt_blob, offset, 278 "regulator-min-microvolt", -ENODATA); 279 uc_pdata->max_uV = fdtdec_get_int(gd->fdt_blob, offset, 280 "regulator-max-microvolt", -ENODATA); 281 uc_pdata->min_uA = fdtdec_get_int(gd->fdt_blob, offset, 282 "regulator-min-microamp", -ENODATA); 283 uc_pdata->max_uA = fdtdec_get_int(gd->fdt_blob, offset, 284 "regulator-max-microamp", -ENODATA); 285 uc_pdata->always_on = fdtdec_get_bool(gd->fdt_blob, offset, 286 "regulator-always-on"); 287 uc_pdata->boot_on = fdtdec_get_bool(gd->fdt_blob, offset, 288 "regulator-boot-on"); 289 290 return 0; 291 } 292 293 UCLASS_DRIVER(regulator) = { 294 .id = UCLASS_REGULATOR, 295 .name = "regulator", 296 .post_bind = regulator_post_bind, 297 .pre_probe = regulator_pre_probe, 298 .per_device_platdata_auto_alloc_size = 299 sizeof(struct dm_regulator_uclass_platdata), 300 }; 301