1 /* 2 * (C) Copyright 2016 3 * Texas Instruments Incorporated, <www.ti.com> 4 * 5 * Keerthy <j-keerthy@ti.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <fdtdec.h> 12 #include <errno.h> 13 #include <dm.h> 14 #include <i2c.h> 15 #include <power/pmic.h> 16 #include <power/regulator.h> 17 #include <power/palmas.h> 18 19 DECLARE_GLOBAL_DATA_PTR; 20 21 #define REGULATOR_ON 0x1 22 #define REGULATOR_OFF 0x0 23 24 #define SMPS_MODE_MASK 0x3 25 #define SMPS_MODE_SHIFT 0x0 26 #define LDO_MODE_MASK 0x1 27 #define LDO_MODE_SHIFT 0x0 28 29 static const char palmas_smps_ctrl[][PALMAS_SMPS_NUM] = { 30 {0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 0x3c}, 31 {0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38}, 32 {0x20, 0x24, 0x2c, 0x30, 0x38}, 33 }; 34 35 static const char palmas_smps_volt[][PALMAS_SMPS_NUM] = { 36 {0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b, 0x3c}, 37 {0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b}, 38 {0x23, 0x27, 0x2f, 0x33, 0x3B} 39 }; 40 41 static const char palmas_ldo_ctrl[][PALMAS_LDO_NUM] = { 42 {0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64}, 43 {0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64}, 44 {0x50, 0x52, 0x54, 0x5e, 0x62} 45 }; 46 47 static const char palmas_ldo_volt[][PALMAS_LDO_NUM] = { 48 {0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65}, 49 {0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65}, 50 {0x51, 0x53, 0x55, 0x5f, 0x63} 51 }; 52 53 static int palmas_smps_enable(struct udevice *dev, int op, bool *enable) 54 { 55 int ret; 56 unsigned int adr; 57 struct dm_regulator_uclass_platdata *uc_pdata; 58 59 uc_pdata = dev_get_uclass_platdata(dev); 60 adr = uc_pdata->ctrl_reg; 61 62 ret = pmic_reg_read(dev->parent, adr); 63 if (ret < 0) 64 return ret; 65 66 if (op == PMIC_OP_GET) { 67 ret &= PALMAS_SMPS_STATUS_MASK; 68 69 if (ret) 70 *enable = true; 71 else 72 *enable = false; 73 74 return 0; 75 } else if (op == PMIC_OP_SET) { 76 if (*enable) 77 ret |= PALMAS_SMPS_MODE_MASK; 78 else 79 ret &= ~(PALMAS_SMPS_MODE_MASK); 80 81 ret = pmic_reg_write(dev->parent, adr, ret); 82 if (ret) 83 return ret; 84 } 85 86 return 0; 87 } 88 89 static int palmas_smps_volt2hex(int uV) 90 { 91 if (uV > PALMAS_LDO_VOLT_MAX) 92 return -EINVAL; 93 94 if (uV > 1650000) 95 return (uV - 1000000) / 20000 + 0x6; 96 97 if (uV == 500000) 98 return 0x6; 99 else 100 return 0x6 + ((uV - 500000) / 10000); 101 } 102 103 static int palmas_smps_hex2volt(int hex, bool range) 104 { 105 unsigned int uV = 0; 106 107 if (hex > PALMAS_SMPS_VOLT_MAX_HEX) 108 return -EINVAL; 109 110 if (hex < 0x7) 111 uV = 500000; 112 else 113 uV = 500000 + (hex - 0x6) * 10000; 114 115 if (range) 116 uV *= 2; 117 118 return uV; 119 } 120 121 static int palmas_smps_val(struct udevice *dev, int op, int *uV) 122 { 123 unsigned int hex, adr; 124 int ret; 125 bool range; 126 struct dm_regulator_uclass_platdata *uc_pdata; 127 128 uc_pdata = dev_get_uclass_platdata(dev); 129 130 if (op == PMIC_OP_GET) 131 *uV = 0; 132 133 adr = uc_pdata->volt_reg; 134 135 ret = pmic_reg_read(dev->parent, adr); 136 if (ret < 0) 137 return ret; 138 139 if (op == PMIC_OP_GET) { 140 if (ret & PALMAS_SMPS_RANGE_MASK) 141 range = true; 142 else 143 range = false; 144 145 ret &= PALMAS_SMPS_VOLT_MASK; 146 ret = palmas_smps_hex2volt(ret, range); 147 if (ret < 0) 148 return ret; 149 *uV = ret; 150 151 return 0; 152 } 153 154 hex = palmas_smps_volt2hex(*uV); 155 if (hex < 0) 156 return hex; 157 158 ret &= ~PALMAS_SMPS_VOLT_MASK; 159 ret |= hex; 160 if (*uV > 1650000) 161 ret |= PALMAS_SMPS_RANGE_MASK; 162 163 return pmic_reg_write(dev->parent, adr, ret); 164 } 165 166 static int palmas_ldo_enable(struct udevice *dev, int op, bool *enable) 167 { 168 int ret; 169 unsigned int adr; 170 struct dm_regulator_uclass_platdata *uc_pdata; 171 172 uc_pdata = dev_get_uclass_platdata(dev); 173 adr = uc_pdata->ctrl_reg; 174 175 ret = pmic_reg_read(dev->parent, adr); 176 if (ret < 0) 177 return ret; 178 179 if (op == PMIC_OP_GET) { 180 ret &= PALMAS_LDO_STATUS_MASK; 181 182 if (ret) 183 *enable = true; 184 else 185 *enable = false; 186 187 return 0; 188 } else if (op == PMIC_OP_SET) { 189 if (*enable) 190 ret |= PALMAS_LDO_MODE_MASK; 191 else 192 ret &= ~(PALMAS_LDO_MODE_MASK); 193 194 ret = pmic_reg_write(dev->parent, adr, ret); 195 if (ret) 196 return ret; 197 } 198 199 return 0; 200 } 201 202 static int palmas_ldo_volt2hex(int uV) 203 { 204 if (uV > PALMAS_LDO_VOLT_MAX) 205 return -EINVAL; 206 207 return (uV - 850000) / 50000; 208 } 209 210 static int palmas_ldo_hex2volt(int hex) 211 { 212 if (hex > PALMAS_LDO_VOLT_MAX_HEX) 213 return -EINVAL; 214 215 if (!hex) 216 return 0; 217 218 return (hex * 50000) + 850000; 219 } 220 221 static int palmas_ldo_val(struct udevice *dev, int op, int *uV) 222 { 223 unsigned int hex, adr; 224 int ret; 225 226 struct dm_regulator_uclass_platdata *uc_pdata; 227 228 if (op == PMIC_OP_GET) 229 *uV = 0; 230 231 uc_pdata = dev_get_uclass_platdata(dev); 232 233 adr = uc_pdata->volt_reg; 234 235 ret = pmic_reg_read(dev->parent, adr); 236 if (ret < 0) 237 return ret; 238 239 if (op == PMIC_OP_GET) { 240 ret &= PALMAS_LDO_VOLT_MASK; 241 ret = palmas_ldo_hex2volt(ret); 242 if (ret < 0) 243 return ret; 244 *uV = ret; 245 return 0; 246 } 247 248 hex = palmas_ldo_volt2hex(*uV); 249 if (hex < 0) 250 return hex; 251 252 ret &= ~PALMAS_LDO_VOLT_MASK; 253 ret |= hex; 254 if (*uV > 1650000) 255 ret |= 0x80; 256 257 return pmic_reg_write(dev->parent, adr, ret); 258 } 259 260 static int palmas_ldo_probe(struct udevice *dev) 261 { 262 struct dm_regulator_uclass_platdata *uc_pdata; 263 struct udevice *parent; 264 265 uc_pdata = dev_get_uclass_platdata(dev); 266 267 parent = dev_get_parent(dev); 268 int type = dev_get_driver_data(parent); 269 270 uc_pdata->type = REGULATOR_TYPE_LDO; 271 272 if (dev->driver_data) { 273 u8 idx = dev->driver_data - 1; 274 uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][idx]; 275 uc_pdata->volt_reg = palmas_ldo_volt[type][idx]; 276 } else { 277 /* check for ldoln and ldousb cases */ 278 if (!strcmp("ldoln", dev->name)) { 279 uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][9]; 280 uc_pdata->volt_reg = palmas_ldo_volt[type][9]; 281 } else if (!strcmp("ldousb", dev->name)) { 282 uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][10]; 283 uc_pdata->volt_reg = palmas_ldo_volt[type][10]; 284 } 285 } 286 287 return 0; 288 } 289 290 static int ldo_get_value(struct udevice *dev) 291 { 292 int uV; 293 int ret; 294 295 ret = palmas_ldo_val(dev, PMIC_OP_GET, &uV); 296 if (ret) 297 return ret; 298 299 return uV; 300 } 301 302 static int ldo_set_value(struct udevice *dev, int uV) 303 { 304 return palmas_ldo_val(dev, PMIC_OP_SET, &uV); 305 } 306 307 static int ldo_get_enable(struct udevice *dev) 308 { 309 bool enable = false; 310 int ret; 311 312 ret = palmas_ldo_enable(dev, PMIC_OP_GET, &enable); 313 if (ret) 314 return ret; 315 316 return enable; 317 } 318 319 static int ldo_set_enable(struct udevice *dev, bool enable) 320 { 321 return palmas_ldo_enable(dev, PMIC_OP_SET, &enable); 322 } 323 324 static int palmas_smps_probe(struct udevice *dev) 325 { 326 struct dm_regulator_uclass_platdata *uc_pdata; 327 struct udevice *parent; 328 int idx; 329 330 uc_pdata = dev_get_uclass_platdata(dev); 331 332 parent = dev_get_parent(dev); 333 int type = dev_get_driver_data(parent); 334 335 uc_pdata->type = REGULATOR_TYPE_BUCK; 336 337 switch (type) { 338 case PALMAS: 339 case TPS659038: 340 switch (dev->driver_data) { 341 case 123: 342 case 12: 343 uc_pdata->ctrl_reg = palmas_smps_ctrl[type][0]; 344 uc_pdata->volt_reg = palmas_smps_volt[type][0]; 345 break; 346 case 3: 347 uc_pdata->ctrl_reg = palmas_smps_ctrl[type][1]; 348 uc_pdata->volt_reg = palmas_smps_volt[type][1]; 349 break; 350 case 45: 351 uc_pdata->ctrl_reg = palmas_smps_ctrl[type][2]; 352 uc_pdata->volt_reg = palmas_smps_volt[type][2]; 353 break; 354 case 6: 355 case 7: 356 case 8: 357 case 9: 358 case 10: 359 idx = dev->driver_data - 3; 360 uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx]; 361 uc_pdata->volt_reg = palmas_smps_volt[type][idx]; 362 break; 363 364 default: 365 printf("Wrong ID for regulator\n"); 366 } 367 break; 368 369 case TPS65917: 370 switch (dev->driver_data) { 371 case 1: 372 case 2: 373 case 3: 374 case 4: 375 case 5: 376 idx = dev->driver_data - 1; 377 uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx]; 378 uc_pdata->volt_reg = palmas_smps_volt[type][idx]; 379 break; 380 case 12: 381 idx = 0; 382 uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx]; 383 uc_pdata->volt_reg = palmas_smps_volt[type][idx]; 384 break; 385 default: 386 printf("Wrong ID for regulator\n"); 387 } 388 break; 389 390 default: 391 printf("Invalid PMIC ID\n"); 392 } 393 394 return 0; 395 } 396 397 static int smps_get_value(struct udevice *dev) 398 { 399 int uV; 400 int ret; 401 402 ret = palmas_smps_val(dev, PMIC_OP_GET, &uV); 403 if (ret) 404 return ret; 405 406 return uV; 407 } 408 409 static int smps_set_value(struct udevice *dev, int uV) 410 { 411 return palmas_smps_val(dev, PMIC_OP_SET, &uV); 412 } 413 414 static int smps_get_enable(struct udevice *dev) 415 { 416 bool enable = false; 417 int ret; 418 419 ret = palmas_smps_enable(dev, PMIC_OP_GET, &enable); 420 if (ret) 421 return ret; 422 423 return enable; 424 } 425 426 static int smps_set_enable(struct udevice *dev, bool enable) 427 { 428 return palmas_smps_enable(dev, PMIC_OP_SET, &enable); 429 } 430 431 static const struct dm_regulator_ops palmas_ldo_ops = { 432 .get_value = ldo_get_value, 433 .set_value = ldo_set_value, 434 .get_enable = ldo_get_enable, 435 .set_enable = ldo_set_enable, 436 }; 437 438 U_BOOT_DRIVER(palmas_ldo) = { 439 .name = PALMAS_LDO_DRIVER, 440 .id = UCLASS_REGULATOR, 441 .ops = &palmas_ldo_ops, 442 .probe = palmas_ldo_probe, 443 }; 444 445 static const struct dm_regulator_ops palmas_smps_ops = { 446 .get_value = smps_get_value, 447 .set_value = smps_set_value, 448 .get_enable = smps_get_enable, 449 .set_enable = smps_set_enable, 450 }; 451 452 U_BOOT_DRIVER(palmas_smps) = { 453 .name = PALMAS_SMPS_DRIVER, 454 .id = UCLASS_REGULATOR, 455 .ops = &palmas_smps_ops, 456 .probe = palmas_smps_probe, 457 }; 458