1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // pv88080-regulator.c - Regulator device driver for PV88080 4 // Copyright (C) 2016 Powerventure Semiconductor Ltd. 5 6 #include <linux/err.h> 7 #include <linux/i2c.h> 8 #include <linux/module.h> 9 #include <linux/of.h> 10 #include <linux/init.h> 11 #include <linux/slab.h> 12 #include <linux/regulator/driver.h> 13 #include <linux/regulator/machine.h> 14 #include <linux/regmap.h> 15 #include <linux/irq.h> 16 #include <linux/interrupt.h> 17 #include <linux/regulator/of_regulator.h> 18 #include "pv88080-regulator.h" 19 20 #define PV88080_MAX_REGULATORS 4 21 22 /* PV88080 REGULATOR IDs */ 23 enum { 24 /* BUCKs */ 25 PV88080_ID_BUCK1, 26 PV88080_ID_BUCK2, 27 PV88080_ID_BUCK3, 28 PV88080_ID_HVBUCK, 29 }; 30 31 enum pv88080_types { 32 TYPE_PV88080_AA, 33 TYPE_PV88080_BA, 34 }; 35 36 struct pv88080_regulator { 37 struct regulator_desc desc; 38 unsigned int mode_reg; 39 unsigned int conf2; 40 unsigned int conf5; 41 }; 42 43 struct pv88080 { 44 struct device *dev; 45 struct regmap *regmap; 46 struct regulator_dev *rdev[PV88080_MAX_REGULATORS]; 47 unsigned long type; 48 const struct pv88080_compatible_regmap *regmap_config; 49 }; 50 51 struct pv88080_buck_voltage { 52 int min_uV; 53 int max_uV; 54 int uV_step; 55 }; 56 57 struct pv88080_buck_regmap { 58 /* REGS */ 59 int buck_enable_reg; 60 int buck_vsel_reg; 61 int buck_mode_reg; 62 int buck_limit_reg; 63 int buck_vdac_range_reg; 64 int buck_vrange_gain_reg; 65 /* MASKS */ 66 int buck_enable_mask; 67 int buck_vsel_mask; 68 int buck_limit_mask; 69 }; 70 71 struct pv88080_compatible_regmap { 72 /* BUCK1, 2, 3 */ 73 struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1]; 74 /* HVBUCK */ 75 int hvbuck_enable_reg; 76 int hvbuck_vsel_reg; 77 int hvbuck_enable_mask; 78 int hvbuck_vsel_mask; 79 }; 80 81 static const struct regmap_config pv88080_regmap_config = { 82 .reg_bits = 8, 83 .val_bits = 8, 84 }; 85 86 /* Current limits array (in uA) for BUCK1, BUCK2, BUCK3. 87 * Entry indexes corresponds to register values. 88 */ 89 90 static const unsigned int pv88080_buck1_limits[] = { 91 3230000, 5130000, 6960000, 8790000 92 }; 93 94 static const unsigned int pv88080_buck23_limits[] = { 95 1496000, 2393000, 3291000, 4189000 96 }; 97 98 static const struct pv88080_buck_voltage pv88080_buck_vol[2] = { 99 { 100 .min_uV = 600000, 101 .max_uV = 1393750, 102 .uV_step = 6250, 103 }, 104 { 105 .min_uV = 1400000, 106 .max_uV = 2193750, 107 .uV_step = 6250, 108 }, 109 }; 110 111 static const struct pv88080_compatible_regmap pv88080_aa_regs = { 112 /* BUCK1 */ 113 .buck_regmap[0] = { 114 .buck_enable_reg = PV88080AA_REG_BUCK1_CONF0, 115 .buck_vsel_reg = PV88080AA_REG_BUCK1_CONF0, 116 .buck_mode_reg = PV88080AA_REG_BUCK1_CONF1, 117 .buck_limit_reg = PV88080AA_REG_BUCK1_CONF1, 118 .buck_vdac_range_reg = PV88080AA_REG_BUCK1_CONF2, 119 .buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5, 120 .buck_enable_mask = PV88080_BUCK1_EN, 121 .buck_vsel_mask = PV88080_VBUCK1_MASK, 122 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK, 123 }, 124 /* BUCK2 */ 125 .buck_regmap[1] = { 126 .buck_enable_reg = PV88080AA_REG_BUCK2_CONF0, 127 .buck_vsel_reg = PV88080AA_REG_BUCK2_CONF0, 128 .buck_mode_reg = PV88080AA_REG_BUCK2_CONF1, 129 .buck_limit_reg = PV88080AA_REG_BUCK2_CONF1, 130 .buck_vdac_range_reg = PV88080AA_REG_BUCK2_CONF2, 131 .buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5, 132 .buck_enable_mask = PV88080_BUCK2_EN, 133 .buck_vsel_mask = PV88080_VBUCK2_MASK, 134 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK, 135 }, 136 /* BUCK3 */ 137 .buck_regmap[2] = { 138 .buck_enable_reg = PV88080AA_REG_BUCK3_CONF0, 139 .buck_vsel_reg = PV88080AA_REG_BUCK3_CONF0, 140 .buck_mode_reg = PV88080AA_REG_BUCK3_CONF1, 141 .buck_limit_reg = PV88080AA_REG_BUCK3_CONF1, 142 .buck_vdac_range_reg = PV88080AA_REG_BUCK3_CONF2, 143 .buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5, 144 .buck_enable_mask = PV88080_BUCK3_EN, 145 .buck_vsel_mask = PV88080_VBUCK3_MASK, 146 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK, 147 }, 148 /* HVBUCK */ 149 .hvbuck_enable_reg = PV88080AA_REG_HVBUCK_CONF2, 150 .hvbuck_vsel_reg = PV88080AA_REG_HVBUCK_CONF1, 151 .hvbuck_enable_mask = PV88080_HVBUCK_EN, 152 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK, 153 }; 154 155 static const struct pv88080_compatible_regmap pv88080_ba_regs = { 156 /* BUCK1 */ 157 .buck_regmap[0] = { 158 .buck_enable_reg = PV88080BA_REG_BUCK1_CONF0, 159 .buck_vsel_reg = PV88080BA_REG_BUCK1_CONF0, 160 .buck_mode_reg = PV88080BA_REG_BUCK1_CONF1, 161 .buck_limit_reg = PV88080BA_REG_BUCK1_CONF1, 162 .buck_vdac_range_reg = PV88080BA_REG_BUCK1_CONF2, 163 .buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5, 164 .buck_enable_mask = PV88080_BUCK1_EN, 165 .buck_vsel_mask = PV88080_VBUCK1_MASK, 166 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK, 167 }, 168 /* BUCK2 */ 169 .buck_regmap[1] = { 170 .buck_enable_reg = PV88080BA_REG_BUCK2_CONF0, 171 .buck_vsel_reg = PV88080BA_REG_BUCK2_CONF0, 172 .buck_mode_reg = PV88080BA_REG_BUCK2_CONF1, 173 .buck_limit_reg = PV88080BA_REG_BUCK2_CONF1, 174 .buck_vdac_range_reg = PV88080BA_REG_BUCK2_CONF2, 175 .buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5, 176 .buck_enable_mask = PV88080_BUCK2_EN, 177 .buck_vsel_mask = PV88080_VBUCK2_MASK, 178 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK, 179 }, 180 /* BUCK3 */ 181 .buck_regmap[2] = { 182 .buck_enable_reg = PV88080BA_REG_BUCK3_CONF0, 183 .buck_vsel_reg = PV88080BA_REG_BUCK3_CONF0, 184 .buck_mode_reg = PV88080BA_REG_BUCK3_CONF1, 185 .buck_limit_reg = PV88080BA_REG_BUCK3_CONF1, 186 .buck_vdac_range_reg = PV88080BA_REG_BUCK3_CONF2, 187 .buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5, 188 .buck_enable_mask = PV88080_BUCK3_EN, 189 .buck_vsel_mask = PV88080_VBUCK3_MASK, 190 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK, 191 }, 192 /* HVBUCK */ 193 .hvbuck_enable_reg = PV88080BA_REG_HVBUCK_CONF2, 194 .hvbuck_vsel_reg = PV88080BA_REG_HVBUCK_CONF1, 195 .hvbuck_enable_mask = PV88080_HVBUCK_EN, 196 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK, 197 }; 198 199 #ifdef CONFIG_OF 200 static const struct of_device_id pv88080_dt_ids[] = { 201 { .compatible = "pvs,pv88080", .data = (void *)TYPE_PV88080_AA }, 202 { .compatible = "pvs,pv88080-aa", .data = (void *)TYPE_PV88080_AA }, 203 { .compatible = "pvs,pv88080-ba", .data = (void *)TYPE_PV88080_BA }, 204 {}, 205 }; 206 MODULE_DEVICE_TABLE(of, pv88080_dt_ids); 207 #endif 208 209 static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev) 210 { 211 struct pv88080_regulator *info = rdev_get_drvdata(rdev); 212 unsigned int data; 213 int ret, mode = 0; 214 215 ret = regmap_read(rdev->regmap, info->mode_reg, &data); 216 if (ret < 0) 217 return ret; 218 219 switch (data & PV88080_BUCK1_MODE_MASK) { 220 case PV88080_BUCK_MODE_SYNC: 221 mode = REGULATOR_MODE_FAST; 222 break; 223 case PV88080_BUCK_MODE_AUTO: 224 mode = REGULATOR_MODE_NORMAL; 225 break; 226 case PV88080_BUCK_MODE_SLEEP: 227 mode = REGULATOR_MODE_STANDBY; 228 break; 229 default: 230 return -EINVAL; 231 } 232 233 return mode; 234 } 235 236 static int pv88080_buck_set_mode(struct regulator_dev *rdev, 237 unsigned int mode) 238 { 239 struct pv88080_regulator *info = rdev_get_drvdata(rdev); 240 int val = 0; 241 242 switch (mode) { 243 case REGULATOR_MODE_FAST: 244 val = PV88080_BUCK_MODE_SYNC; 245 break; 246 case REGULATOR_MODE_NORMAL: 247 val = PV88080_BUCK_MODE_AUTO; 248 break; 249 case REGULATOR_MODE_STANDBY: 250 val = PV88080_BUCK_MODE_SLEEP; 251 break; 252 default: 253 return -EINVAL; 254 } 255 256 return regmap_update_bits(rdev->regmap, info->mode_reg, 257 PV88080_BUCK1_MODE_MASK, val); 258 } 259 260 static const struct regulator_ops pv88080_buck_ops = { 261 .get_mode = pv88080_buck_get_mode, 262 .set_mode = pv88080_buck_set_mode, 263 .enable = regulator_enable_regmap, 264 .disable = regulator_disable_regmap, 265 .is_enabled = regulator_is_enabled_regmap, 266 .set_voltage_sel = regulator_set_voltage_sel_regmap, 267 .get_voltage_sel = regulator_get_voltage_sel_regmap, 268 .list_voltage = regulator_list_voltage_linear, 269 .set_current_limit = regulator_set_current_limit_regmap, 270 .get_current_limit = regulator_get_current_limit_regmap, 271 }; 272 273 static const struct regulator_ops pv88080_hvbuck_ops = { 274 .enable = regulator_enable_regmap, 275 .disable = regulator_disable_regmap, 276 .is_enabled = regulator_is_enabled_regmap, 277 .set_voltage_sel = regulator_set_voltage_sel_regmap, 278 .get_voltage_sel = regulator_get_voltage_sel_regmap, 279 .list_voltage = regulator_list_voltage_linear, 280 }; 281 282 #define PV88080_BUCK(chip, regl_name, min, step, max, limits_array) \ 283 {\ 284 .desc = {\ 285 .id = chip##_ID_##regl_name,\ 286 .name = __stringify(chip##_##regl_name),\ 287 .of_match = of_match_ptr(#regl_name),\ 288 .regulators_node = of_match_ptr("regulators"),\ 289 .type = REGULATOR_VOLTAGE,\ 290 .owner = THIS_MODULE,\ 291 .ops = &pv88080_buck_ops,\ 292 .min_uV = min, \ 293 .uV_step = step, \ 294 .n_voltages = ((max) - (min))/(step) + 1, \ 295 .curr_table = limits_array, \ 296 .n_current_limits = ARRAY_SIZE(limits_array), \ 297 },\ 298 } 299 300 #define PV88080_HVBUCK(chip, regl_name, min, step, max) \ 301 {\ 302 .desc = {\ 303 .id = chip##_ID_##regl_name,\ 304 .name = __stringify(chip##_##regl_name),\ 305 .of_match = of_match_ptr(#regl_name),\ 306 .regulators_node = of_match_ptr("regulators"),\ 307 .type = REGULATOR_VOLTAGE,\ 308 .owner = THIS_MODULE,\ 309 .ops = &pv88080_hvbuck_ops,\ 310 .min_uV = min, \ 311 .uV_step = step, \ 312 .n_voltages = ((max) - (min))/(step) + 1, \ 313 },\ 314 } 315 316 static struct pv88080_regulator pv88080_regulator_info[] = { 317 PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750, 318 pv88080_buck1_limits), 319 PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750, 320 pv88080_buck23_limits), 321 PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750, 322 pv88080_buck23_limits), 323 PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000), 324 }; 325 326 static irqreturn_t pv88080_irq_handler(int irq, void *data) 327 { 328 struct pv88080 *chip = data; 329 int i, reg_val, err, ret = IRQ_NONE; 330 331 err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, ®_val); 332 if (err < 0) 333 goto error_i2c; 334 335 if (reg_val & PV88080_E_VDD_FLT) { 336 for (i = 0; i < PV88080_MAX_REGULATORS; i++) { 337 if (chip->rdev[i] != NULL) 338 regulator_notifier_call_chain(chip->rdev[i], 339 REGULATOR_EVENT_UNDER_VOLTAGE, 340 NULL); 341 } 342 343 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A, 344 PV88080_E_VDD_FLT); 345 if (err < 0) 346 goto error_i2c; 347 348 ret = IRQ_HANDLED; 349 } 350 351 if (reg_val & PV88080_E_OVER_TEMP) { 352 for (i = 0; i < PV88080_MAX_REGULATORS; i++) { 353 if (chip->rdev[i] != NULL) 354 regulator_notifier_call_chain(chip->rdev[i], 355 REGULATOR_EVENT_OVER_TEMP, 356 NULL); 357 } 358 359 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A, 360 PV88080_E_OVER_TEMP); 361 if (err < 0) 362 goto error_i2c; 363 364 ret = IRQ_HANDLED; 365 } 366 367 return ret; 368 369 error_i2c: 370 dev_err(chip->dev, "I2C error : %d\n", err); 371 return IRQ_NONE; 372 } 373 374 /* 375 * I2C driver interface functions 376 */ 377 static int pv88080_i2c_probe(struct i2c_client *i2c, 378 const struct i2c_device_id *id) 379 { 380 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); 381 struct pv88080 *chip; 382 const struct pv88080_compatible_regmap *regmap_config; 383 const struct of_device_id *match; 384 struct regulator_config config = { }; 385 int i, error, ret; 386 unsigned int conf2, conf5; 387 388 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL); 389 if (!chip) 390 return -ENOMEM; 391 392 chip->dev = &i2c->dev; 393 chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_regmap_config); 394 if (IS_ERR(chip->regmap)) { 395 error = PTR_ERR(chip->regmap); 396 dev_err(chip->dev, "Failed to allocate register map: %d\n", 397 error); 398 return error; 399 } 400 401 if (i2c->dev.of_node) { 402 match = of_match_node(pv88080_dt_ids, i2c->dev.of_node); 403 if (!match) { 404 dev_err(chip->dev, "Failed to get of_match_node\n"); 405 return -EINVAL; 406 } 407 chip->type = (unsigned long)match->data; 408 } else { 409 chip->type = id->driver_data; 410 } 411 412 i2c_set_clientdata(i2c, chip); 413 414 if (i2c->irq != 0) { 415 ret = regmap_write(chip->regmap, PV88080_REG_MASK_A, 0xFF); 416 if (ret < 0) { 417 dev_err(chip->dev, 418 "Failed to mask A reg: %d\n", ret); 419 return ret; 420 } 421 ret = regmap_write(chip->regmap, PV88080_REG_MASK_B, 0xFF); 422 if (ret < 0) { 423 dev_err(chip->dev, 424 "Failed to mask B reg: %d\n", ret); 425 return ret; 426 } 427 ret = regmap_write(chip->regmap, PV88080_REG_MASK_C, 0xFF); 428 if (ret < 0) { 429 dev_err(chip->dev, 430 "Failed to mask C reg: %d\n", ret); 431 return ret; 432 } 433 434 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, 435 pv88080_irq_handler, 436 IRQF_TRIGGER_LOW|IRQF_ONESHOT, 437 "pv88080", chip); 438 if (ret != 0) { 439 dev_err(chip->dev, "Failed to request IRQ: %d\n", 440 i2c->irq); 441 return ret; 442 } 443 444 ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A, 445 PV88080_M_VDD_FLT | PV88080_M_OVER_TEMP, 0); 446 if (ret < 0) { 447 dev_err(chip->dev, 448 "Failed to update mask reg: %d\n", ret); 449 return ret; 450 } 451 } else { 452 dev_warn(chip->dev, "No IRQ configured\n"); 453 } 454 455 switch (chip->type) { 456 case TYPE_PV88080_AA: 457 chip->regmap_config = &pv88080_aa_regs; 458 break; 459 case TYPE_PV88080_BA: 460 chip->regmap_config = &pv88080_ba_regs; 461 break; 462 } 463 464 regmap_config = chip->regmap_config; 465 config.dev = chip->dev; 466 config.regmap = chip->regmap; 467 468 /* Registeration for BUCK1, 2, 3 */ 469 for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) { 470 if (init_data) 471 config.init_data = &init_data[i]; 472 473 pv88080_regulator_info[i].desc.csel_reg 474 = regmap_config->buck_regmap[i].buck_limit_reg; 475 pv88080_regulator_info[i].desc.csel_mask 476 = regmap_config->buck_regmap[i].buck_limit_mask; 477 pv88080_regulator_info[i].mode_reg 478 = regmap_config->buck_regmap[i].buck_mode_reg; 479 pv88080_regulator_info[i].conf2 480 = regmap_config->buck_regmap[i].buck_vdac_range_reg; 481 pv88080_regulator_info[i].conf5 482 = regmap_config->buck_regmap[i].buck_vrange_gain_reg; 483 pv88080_regulator_info[i].desc.enable_reg 484 = regmap_config->buck_regmap[i].buck_enable_reg; 485 pv88080_regulator_info[i].desc.enable_mask 486 = regmap_config->buck_regmap[i].buck_enable_mask; 487 pv88080_regulator_info[i].desc.vsel_reg 488 = regmap_config->buck_regmap[i].buck_vsel_reg; 489 pv88080_regulator_info[i].desc.vsel_mask 490 = regmap_config->buck_regmap[i].buck_vsel_mask; 491 492 ret = regmap_read(chip->regmap, 493 pv88080_regulator_info[i].conf2, &conf2); 494 if (ret < 0) 495 return ret; 496 conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) & 497 PV88080_BUCK_VDAC_RANGE_MASK); 498 499 ret = regmap_read(chip->regmap, 500 pv88080_regulator_info[i].conf5, &conf5); 501 if (ret < 0) 502 return ret; 503 conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) & 504 PV88080_BUCK_VRANGE_GAIN_MASK); 505 506 pv88080_regulator_info[i].desc.min_uV = 507 pv88080_buck_vol[conf2].min_uV * (conf5+1); 508 pv88080_regulator_info[i].desc.uV_step = 509 pv88080_buck_vol[conf2].uV_step * (conf5+1); 510 pv88080_regulator_info[i].desc.n_voltages = 511 ((pv88080_buck_vol[conf2].max_uV * (conf5+1)) 512 - (pv88080_regulator_info[i].desc.min_uV)) 513 /(pv88080_regulator_info[i].desc.uV_step) + 1; 514 515 config.driver_data = (void *)&pv88080_regulator_info[i]; 516 chip->rdev[i] = devm_regulator_register(chip->dev, 517 &pv88080_regulator_info[i].desc, &config); 518 if (IS_ERR(chip->rdev[i])) { 519 dev_err(chip->dev, 520 "Failed to register PV88080 regulator\n"); 521 return PTR_ERR(chip->rdev[i]); 522 } 523 } 524 525 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg 526 = regmap_config->hvbuck_enable_reg; 527 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask 528 = regmap_config->hvbuck_enable_mask; 529 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg 530 = regmap_config->hvbuck_vsel_reg; 531 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask 532 = regmap_config->hvbuck_vsel_mask; 533 534 /* Registeration for HVBUCK */ 535 if (init_data) 536 config.init_data = &init_data[PV88080_ID_HVBUCK]; 537 538 config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK]; 539 chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev, 540 &pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config); 541 if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) { 542 dev_err(chip->dev, "Failed to register PV88080 regulator\n"); 543 return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]); 544 } 545 546 return 0; 547 } 548 549 static const struct i2c_device_id pv88080_i2c_id[] = { 550 { "pv88080", TYPE_PV88080_AA }, 551 { "pv88080-aa", TYPE_PV88080_AA }, 552 { "pv88080-ba", TYPE_PV88080_BA }, 553 {}, 554 }; 555 MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id); 556 557 static struct i2c_driver pv88080_regulator_driver = { 558 .driver = { 559 .name = "pv88080", 560 .of_match_table = of_match_ptr(pv88080_dt_ids), 561 }, 562 .probe = pv88080_i2c_probe, 563 .id_table = pv88080_i2c_id, 564 }; 565 566 module_i2c_driver(pv88080_regulator_driver); 567 568 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); 569 MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080"); 570 MODULE_LICENSE("GPL"); 571