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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2015 Samsung Electronics * Przemyslaw Marczak <p.marczak@samsung.com> */ #include <fdtdec.h> #include <errno.h> #include <dm.h> #include <linux/printk.h> #include <power/pmic.h> #include <power/regulator.h> #include <power/sandbox_pmic.h> #define MODE(_id, _val, _name) [_id] = { \ .id = _id, \ .register_value = _val, \ .name = _name, \ } #define RANGE(_min, _max, _step) { \ .min = _min, \ .max = _max, \ .step = _step, \ } /* * struct output_range - helper structure type to define the range of output * operating values (current/voltage), limited by the PMIC IC design. * * @min - minimum value * @max - maximum value * @step - step value */ struct output_range { int min; int max; int step; }; /* BUCK: 1,2 - voltage range */ static struct output_range buck_voltage_range[] = { RANGE(OUT_BUCK1_UV_MIN, OUT_BUCK1_UV_MAX, OUT_BUCK1_UV_STEP), RANGE(OUT_BUCK2_UV_MIN, OUT_BUCK2_UV_MAX, OUT_BUCK2_UV_STEP), }; /* BUCK: 1 - current range */ static struct output_range buck_current_range[] = { RANGE(OUT_BUCK1_UA_MIN, OUT_BUCK1_UA_MAX, OUT_BUCK1_UA_STEP), }; /* BUCK operating modes */ static struct dm_regulator_mode sandbox_buck_modes[] = { MODE(BUCK_OM_OFF, OM2REG(BUCK_OM_OFF), "OFF"), MODE(BUCK_OM_ON, OM2REG(BUCK_OM_ON), "ON"), MODE(BUCK_OM_PWM, OM2REG(BUCK_OM_PWM), "PWM"), }; /* LDO: 1,2 - voltage range */ static struct output_range ldo_voltage_range[] = { RANGE(OUT_LDO1_UV_MIN, OUT_LDO1_UV_MAX, OUT_LDO1_UV_STEP), RANGE(OUT_LDO2_UV_MIN, OUT_LDO2_UV_MAX, OUT_LDO2_UV_STEP), }; /* LDO: 1 - current range */ static struct output_range ldo_current_range[] = { RANGE(OUT_LDO1_UA_MIN, OUT_LDO1_UA_MAX, OUT_LDO1_UA_STEP), }; /* LDO operating modes */ static struct dm_regulator_mode sandbox_ldo_modes[] = { MODE(LDO_OM_OFF, OM2REG(LDO_OM_OFF), "OFF"), MODE(LDO_OM_ON, OM2REG(LDO_OM_ON), "ON"), MODE(LDO_OM_SLEEP, OM2REG(LDO_OM_SLEEP), "SLEEP"), MODE(LDO_OM_STANDBY, OM2REG(LDO_OM_STANDBY), "STANDBY"), }; int out_get_value(struct udevice *dev, int output_count, int reg_type, struct output_range *range) { uint8_t reg_val; uint reg; int ret; if (dev->driver_data > output_count) { pr_err("Unknown regulator number: %lu for PMIC %s!", dev->driver_data, dev->name); return -EINVAL; } reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type; ret = pmic_read(dev->parent, reg, ®_val, 1); if (ret) { pr_err("PMIC read failed: %d\n", ret); return ret; } ret = REG2VAL(range[dev->driver_data - 1].min, range[dev->driver_data - 1].step, reg_val); return ret; } static int out_set_value(struct udevice *dev, int output_count, int reg_type, struct output_range *range, int value) { uint8_t reg_val; uint reg; int ret; int max_value; if (dev->driver_data > output_count) { pr_err("Unknown regulator number: %lu for PMIC %s!", dev->driver_data, dev->name); return -EINVAL; } max_value = range[dev->driver_data - 1].max; if (value > max_value) { pr_err("Wrong value for %s: %lu. Max is: %d.", dev->name, dev->driver_data, max_value); return -EINVAL; } reg_val = VAL2REG(range[dev->driver_data - 1].min, range[dev->driver_data - 1].step, value); reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type; ret = pmic_write(dev->parent, reg, ®_val, 1); if (ret) { pr_err("PMIC write failed: %d\n", ret); return ret; } return 0; } static int out_get_mode(struct udevice *dev) { struct dm_regulator_uclass_plat *uc_pdata; uint8_t reg_val; uint reg; int ret; int i; uc_pdata = dev_get_uclass_plat(dev); reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM; ret = pmic_read(dev->parent, reg, ®_val, 1); if (ret) { pr_err("PMIC read failed: %d\n", ret); return ret; } for (i = 0; i < uc_pdata->mode_count; i++) { if (reg_val == uc_pdata->mode[i].register_value) return uc_pdata->mode[i].id; } pr_err("Unknown operation mode for %s!", dev->name); return -EINVAL; } static int out_set_mode(struct udevice *dev, int mode) { struct dm_regulator_uclass_plat *uc_pdata; int reg_val = -1; uint reg; int ret; int i; uc_pdata = dev_get_uclass_plat(dev); if (mode >= uc_pdata->mode_count) return -EINVAL; for (i = 0; i < uc_pdata->mode_count; i++) { if (mode == uc_pdata->mode[i].id) { reg_val = uc_pdata->mode[i].register_value; break; } } if (reg_val == -1) { pr_err("Unknown operation mode for %s!", dev->name); return -EINVAL; } reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM; ret = pmic_write(dev->parent, reg, (uint8_t *)®_val, 1); if (ret) { pr_err("PMIC write failed: %d\n", ret); return ret; } return 0; } static int buck_get_voltage(struct udevice *dev) { return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV, buck_voltage_range); } static int buck_set_voltage(struct udevice *dev, int uV) { return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV, buck_voltage_range, uV); } static int buck_get_current(struct udevice *dev) { /* BUCK2 - unsupported */ if (dev->driver_data == 2) return -ENOSYS; return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA, buck_current_range); } static int buck_set_current(struct udevice *dev, int uA) { /* BUCK2 - unsupported */ if (dev->driver_data == 2) return -ENOSYS; return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA, buck_current_range, uA); } static int buck_get_enable(struct udevice *dev) { if (out_get_mode(dev) == BUCK_OM_OFF) return false; return true; } static int buck_set_enable(struct udevice *dev, bool enable) { return out_set_mode(dev, enable ? BUCK_OM_ON : BUCK_OM_OFF); } static int sandbox_buck_probe(struct udevice *dev) { struct dm_regulator_uclass_plat *uc_pdata; uc_pdata = dev_get_uclass_plat(dev); uc_pdata->type = REGULATOR_TYPE_BUCK; uc_pdata->mode = sandbox_buck_modes; uc_pdata->mode_count = ARRAY_SIZE(sandbox_buck_modes); return 0; } static const struct dm_regulator_ops sandbox_buck_ops = { .get_value = buck_get_voltage, .set_value = buck_set_voltage, .get_current = buck_get_current, .set_current = buck_set_current, .get_enable = buck_get_enable, .set_enable = buck_set_enable, .get_mode = out_get_mode, .set_mode = out_set_mode, }; U_BOOT_DRIVER(sandbox_buck) = { .name = SANDBOX_BUCK_DRIVER, .id = UCLASS_REGULATOR, .ops = &sandbox_buck_ops, .probe = sandbox_buck_probe, }; static int ldo_get_voltage(struct udevice *dev) { return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV, ldo_voltage_range); } static int ldo_set_voltage(struct udevice *dev, int uV) { return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV, ldo_voltage_range, uV); } static int ldo_get_current(struct udevice *dev) { /* LDO2 - unsupported */ if (dev->driver_data == 2) return -ENOSYS; return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA, ldo_current_range); } static int ldo_set_current(struct udevice *dev, int uA) { /* LDO2 - unsupported */ if (dev->driver_data == 2) return -ENOSYS; return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA, ldo_current_range, uA); } static int ldo_get_enable(struct udevice *dev) { if (out_get_mode(dev) == LDO_OM_OFF) return false; return true; } static int ldo_set_enable(struct udevice *dev, bool enable) { return out_set_mode(dev, enable ? LDO_OM_ON : LDO_OM_OFF); } static int sandbox_ldo_probe(struct udevice *dev) { struct dm_regulator_uclass_plat *uc_pdata; uc_pdata = dev_get_uclass_plat(dev); uc_pdata->type = REGULATOR_TYPE_LDO; uc_pdata->mode = sandbox_ldo_modes; uc_pdata->mode_count = ARRAY_SIZE(sandbox_ldo_modes); return 0; } static const struct dm_regulator_ops sandbox_ldo_ops = { .get_value = ldo_get_voltage, .set_value = ldo_set_voltage, .get_current = ldo_get_current, .set_current = ldo_set_current, .get_enable = ldo_get_enable, .set_enable = ldo_set_enable, .get_mode = out_get_mode, .set_mode = out_set_mode, }; U_BOOT_DRIVER(sandbox_ldo) = { .name = SANDBOX_LDO_DRIVER, .id = UCLASS_REGULATOR, .ops = &sandbox_ldo_ops, .probe = sandbox_ldo_probe, }; |