1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // Copyright (c) 2011 Samsung Electronics Co., Ltd 4 // http://www.samsung.com 5 6 #include <linux/err.h> 7 #include <linux/of_gpio.h> 8 #include <linux/gpio/consumer.h> 9 #include <linux/module.h> 10 #include <linux/platform_device.h> 11 #include <linux/regulator/driver.h> 12 #include <linux/regulator/machine.h> 13 #include <linux/mfd/samsung/core.h> 14 #include <linux/mfd/samsung/s5m8767.h> 15 #include <linux/regulator/of_regulator.h> 16 #include <linux/regmap.h> 17 18 #define S5M8767_OPMODE_NORMAL_MODE 0x1 19 20 struct s5m8767_info { 21 struct device *dev; 22 struct sec_pmic_dev *iodev; 23 int num_regulators; 24 struct sec_opmode_data *opmode; 25 26 int ramp_delay; 27 bool buck2_ramp; 28 bool buck3_ramp; 29 bool buck4_ramp; 30 31 bool buck2_gpiodvs; 32 bool buck3_gpiodvs; 33 bool buck4_gpiodvs; 34 u8 buck2_vol[8]; 35 u8 buck3_vol[8]; 36 u8 buck4_vol[8]; 37 int buck_gpios[3]; 38 int buck_ds[3]; 39 int buck_gpioindex; 40 }; 41 42 struct sec_voltage_desc { 43 int max; 44 int min; 45 int step; 46 }; 47 48 static const struct sec_voltage_desc buck_voltage_val1 = { 49 .max = 2225000, 50 .min = 650000, 51 .step = 6250, 52 }; 53 54 static const struct sec_voltage_desc buck_voltage_val2 = { 55 .max = 1600000, 56 .min = 600000, 57 .step = 6250, 58 }; 59 60 static const struct sec_voltage_desc buck_voltage_val3 = { 61 .max = 3000000, 62 .min = 750000, 63 .step = 12500, 64 }; 65 66 static const struct sec_voltage_desc ldo_voltage_val1 = { 67 .max = 3950000, 68 .min = 800000, 69 .step = 50000, 70 }; 71 72 static const struct sec_voltage_desc ldo_voltage_val2 = { 73 .max = 2375000, 74 .min = 800000, 75 .step = 25000, 76 }; 77 78 static const struct sec_voltage_desc *reg_voltage_map[] = { 79 [S5M8767_LDO1] = &ldo_voltage_val2, 80 [S5M8767_LDO2] = &ldo_voltage_val2, 81 [S5M8767_LDO3] = &ldo_voltage_val1, 82 [S5M8767_LDO4] = &ldo_voltage_val1, 83 [S5M8767_LDO5] = &ldo_voltage_val1, 84 [S5M8767_LDO6] = &ldo_voltage_val2, 85 [S5M8767_LDO7] = &ldo_voltage_val2, 86 [S5M8767_LDO8] = &ldo_voltage_val2, 87 [S5M8767_LDO9] = &ldo_voltage_val1, 88 [S5M8767_LDO10] = &ldo_voltage_val1, 89 [S5M8767_LDO11] = &ldo_voltage_val1, 90 [S5M8767_LDO12] = &ldo_voltage_val1, 91 [S5M8767_LDO13] = &ldo_voltage_val1, 92 [S5M8767_LDO14] = &ldo_voltage_val1, 93 [S5M8767_LDO15] = &ldo_voltage_val2, 94 [S5M8767_LDO16] = &ldo_voltage_val1, 95 [S5M8767_LDO17] = &ldo_voltage_val1, 96 [S5M8767_LDO18] = &ldo_voltage_val1, 97 [S5M8767_LDO19] = &ldo_voltage_val1, 98 [S5M8767_LDO20] = &ldo_voltage_val1, 99 [S5M8767_LDO21] = &ldo_voltage_val1, 100 [S5M8767_LDO22] = &ldo_voltage_val1, 101 [S5M8767_LDO23] = &ldo_voltage_val1, 102 [S5M8767_LDO24] = &ldo_voltage_val1, 103 [S5M8767_LDO25] = &ldo_voltage_val1, 104 [S5M8767_LDO26] = &ldo_voltage_val1, 105 [S5M8767_LDO27] = &ldo_voltage_val1, 106 [S5M8767_LDO28] = &ldo_voltage_val1, 107 [S5M8767_BUCK1] = &buck_voltage_val1, 108 [S5M8767_BUCK2] = &buck_voltage_val2, 109 [S5M8767_BUCK3] = &buck_voltage_val2, 110 [S5M8767_BUCK4] = &buck_voltage_val2, 111 [S5M8767_BUCK5] = &buck_voltage_val1, 112 [S5M8767_BUCK6] = &buck_voltage_val1, 113 [S5M8767_BUCK7] = &buck_voltage_val3, 114 [S5M8767_BUCK8] = &buck_voltage_val3, 115 [S5M8767_BUCK9] = &buck_voltage_val3, 116 }; 117 118 static const unsigned int s5m8767_opmode_reg[][4] = { 119 /* {OFF, ON, LOWPOWER, SUSPEND} */ 120 /* LDO1 ... LDO28 */ 121 {0x0, 0x3, 0x2, 0x1}, /* LDO1 */ 122 {0x0, 0x3, 0x2, 0x1}, 123 {0x0, 0x3, 0x2, 0x1}, 124 {0x0, 0x0, 0x0, 0x0}, 125 {0x0, 0x3, 0x2, 0x1}, /* LDO5 */ 126 {0x0, 0x3, 0x2, 0x1}, 127 {0x0, 0x3, 0x2, 0x1}, 128 {0x0, 0x3, 0x2, 0x1}, 129 {0x0, 0x3, 0x2, 0x1}, 130 {0x0, 0x3, 0x2, 0x1}, /* LDO10 */ 131 {0x0, 0x3, 0x2, 0x1}, 132 {0x0, 0x3, 0x2, 0x1}, 133 {0x0, 0x3, 0x2, 0x1}, 134 {0x0, 0x3, 0x2, 0x1}, 135 {0x0, 0x3, 0x2, 0x1}, /* LDO15 */ 136 {0x0, 0x3, 0x2, 0x1}, 137 {0x0, 0x3, 0x2, 0x1}, 138 {0x0, 0x0, 0x0, 0x0}, 139 {0x0, 0x3, 0x2, 0x1}, 140 {0x0, 0x3, 0x2, 0x1}, /* LDO20 */ 141 {0x0, 0x3, 0x2, 0x1}, 142 {0x0, 0x3, 0x2, 0x1}, 143 {0x0, 0x0, 0x0, 0x0}, 144 {0x0, 0x3, 0x2, 0x1}, 145 {0x0, 0x3, 0x2, 0x1}, /* LDO25 */ 146 {0x0, 0x3, 0x2, 0x1}, 147 {0x0, 0x3, 0x2, 0x1}, 148 {0x0, 0x3, 0x2, 0x1}, /* LDO28 */ 149 150 /* BUCK1 ... BUCK9 */ 151 {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */ 152 {0x0, 0x3, 0x1, 0x1}, 153 {0x0, 0x3, 0x1, 0x1}, 154 {0x0, 0x3, 0x1, 0x1}, 155 {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */ 156 {0x0, 0x3, 0x1, 0x1}, 157 {0x0, 0x3, 0x1, 0x1}, 158 {0x0, 0x3, 0x1, 0x1}, 159 {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */ 160 }; 161 162 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id, 163 int *reg, int *enable_ctrl) 164 { 165 int i; 166 unsigned int mode; 167 168 switch (reg_id) { 169 case S5M8767_LDO1 ... S5M8767_LDO2: 170 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1); 171 break; 172 case S5M8767_LDO3 ... S5M8767_LDO28: 173 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3); 174 break; 175 case S5M8767_BUCK1: 176 *reg = S5M8767_REG_BUCK1CTRL1; 177 break; 178 case S5M8767_BUCK2 ... S5M8767_BUCK4: 179 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9; 180 break; 181 case S5M8767_BUCK5: 182 *reg = S5M8767_REG_BUCK5CTRL1; 183 break; 184 case S5M8767_BUCK6 ... S5M8767_BUCK9: 185 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2; 186 break; 187 default: 188 return -EINVAL; 189 } 190 191 for (i = 0; i < s5m8767->num_regulators; i++) { 192 if (s5m8767->opmode[i].id == reg_id) { 193 mode = s5m8767->opmode[i].mode; 194 break; 195 } 196 } 197 198 if (i >= s5m8767->num_regulators) 199 return -EINVAL; 200 201 *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT; 202 203 return 0; 204 } 205 206 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767) 207 { 208 int reg; 209 210 switch (reg_id) { 211 case S5M8767_LDO1 ... S5M8767_LDO2: 212 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1); 213 break; 214 case S5M8767_LDO3 ... S5M8767_LDO28: 215 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3); 216 break; 217 case S5M8767_BUCK1: 218 reg = S5M8767_REG_BUCK1CTRL2; 219 break; 220 case S5M8767_BUCK2: 221 reg = S5M8767_REG_BUCK2DVS1; 222 if (s5m8767->buck2_gpiodvs) 223 reg += s5m8767->buck_gpioindex; 224 break; 225 case S5M8767_BUCK3: 226 reg = S5M8767_REG_BUCK3DVS1; 227 if (s5m8767->buck3_gpiodvs) 228 reg += s5m8767->buck_gpioindex; 229 break; 230 case S5M8767_BUCK4: 231 reg = S5M8767_REG_BUCK4DVS1; 232 if (s5m8767->buck4_gpiodvs) 233 reg += s5m8767->buck_gpioindex; 234 break; 235 case S5M8767_BUCK5: 236 reg = S5M8767_REG_BUCK5CTRL2; 237 break; 238 case S5M8767_BUCK6 ... S5M8767_BUCK9: 239 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2; 240 break; 241 default: 242 return -EINVAL; 243 } 244 245 return reg; 246 } 247 248 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc, 249 int min_vol) 250 { 251 int selector = 0; 252 253 if (desc == NULL) 254 return -EINVAL; 255 256 if (min_vol > desc->max) 257 return -EINVAL; 258 259 if (min_vol < desc->min) 260 min_vol = desc->min; 261 262 selector = DIV_ROUND_UP(min_vol - desc->min, desc->step); 263 264 if (desc->min + desc->step * selector > desc->max) 265 return -EINVAL; 266 267 return selector; 268 } 269 270 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767) 271 { 272 int temp_index = s5m8767->buck_gpioindex; 273 274 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1); 275 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1); 276 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1); 277 278 return 0; 279 } 280 281 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767) 282 { 283 int temp_index = s5m8767->buck_gpioindex; 284 285 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1); 286 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1); 287 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1); 288 289 return 0; 290 } 291 292 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev, 293 unsigned selector) 294 { 295 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev); 296 int reg_id = rdev_get_id(rdev); 297 int old_index, index = 0; 298 u8 *buck234_vol = NULL; 299 300 switch (reg_id) { 301 case S5M8767_LDO1 ... S5M8767_LDO28: 302 break; 303 case S5M8767_BUCK1 ... S5M8767_BUCK6: 304 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs) 305 buck234_vol = &s5m8767->buck2_vol[0]; 306 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs) 307 buck234_vol = &s5m8767->buck3_vol[0]; 308 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs) 309 buck234_vol = &s5m8767->buck4_vol[0]; 310 break; 311 case S5M8767_BUCK7 ... S5M8767_BUCK8: 312 return -EINVAL; 313 case S5M8767_BUCK9: 314 break; 315 default: 316 return -EINVAL; 317 } 318 319 /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */ 320 if (buck234_vol) { 321 while (*buck234_vol != selector) { 322 buck234_vol++; 323 index++; 324 } 325 old_index = s5m8767->buck_gpioindex; 326 s5m8767->buck_gpioindex = index; 327 328 if (index > old_index) 329 return s5m8767_set_high(s5m8767); 330 else 331 return s5m8767_set_low(s5m8767); 332 } else { 333 return regulator_set_voltage_sel_regmap(rdev, selector); 334 } 335 } 336 337 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev, 338 unsigned int old_sel, 339 unsigned int new_sel) 340 { 341 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev); 342 343 if ((old_sel < new_sel) && s5m8767->ramp_delay) 344 return DIV_ROUND_UP(rdev->desc->uV_step * (new_sel - old_sel), 345 s5m8767->ramp_delay * 1000); 346 return 0; 347 } 348 349 static const struct regulator_ops s5m8767_ops = { 350 .list_voltage = regulator_list_voltage_linear, 351 .is_enabled = regulator_is_enabled_regmap, 352 .enable = regulator_enable_regmap, 353 .disable = regulator_disable_regmap, 354 .get_voltage_sel = regulator_get_voltage_sel_regmap, 355 .set_voltage_sel = s5m8767_set_voltage_sel, 356 .set_voltage_time_sel = s5m8767_set_voltage_time_sel, 357 }; 358 359 static const struct regulator_ops s5m8767_buck78_ops = { 360 .list_voltage = regulator_list_voltage_linear, 361 .is_enabled = regulator_is_enabled_regmap, 362 .enable = regulator_enable_regmap, 363 .disable = regulator_disable_regmap, 364 .get_voltage_sel = regulator_get_voltage_sel_regmap, 365 .set_voltage_sel = regulator_set_voltage_sel_regmap, 366 }; 367 368 #define s5m8767_regulator_desc(_name) { \ 369 .name = #_name, \ 370 .id = S5M8767_##_name, \ 371 .ops = &s5m8767_ops, \ 372 .type = REGULATOR_VOLTAGE, \ 373 .owner = THIS_MODULE, \ 374 } 375 376 #define s5m8767_regulator_buck78_desc(_name) { \ 377 .name = #_name, \ 378 .id = S5M8767_##_name, \ 379 .ops = &s5m8767_buck78_ops, \ 380 .type = REGULATOR_VOLTAGE, \ 381 .owner = THIS_MODULE, \ 382 } 383 384 static struct regulator_desc regulators[] = { 385 s5m8767_regulator_desc(LDO1), 386 s5m8767_regulator_desc(LDO2), 387 s5m8767_regulator_desc(LDO3), 388 s5m8767_regulator_desc(LDO4), 389 s5m8767_regulator_desc(LDO5), 390 s5m8767_regulator_desc(LDO6), 391 s5m8767_regulator_desc(LDO7), 392 s5m8767_regulator_desc(LDO8), 393 s5m8767_regulator_desc(LDO9), 394 s5m8767_regulator_desc(LDO10), 395 s5m8767_regulator_desc(LDO11), 396 s5m8767_regulator_desc(LDO12), 397 s5m8767_regulator_desc(LDO13), 398 s5m8767_regulator_desc(LDO14), 399 s5m8767_regulator_desc(LDO15), 400 s5m8767_regulator_desc(LDO16), 401 s5m8767_regulator_desc(LDO17), 402 s5m8767_regulator_desc(LDO18), 403 s5m8767_regulator_desc(LDO19), 404 s5m8767_regulator_desc(LDO20), 405 s5m8767_regulator_desc(LDO21), 406 s5m8767_regulator_desc(LDO22), 407 s5m8767_regulator_desc(LDO23), 408 s5m8767_regulator_desc(LDO24), 409 s5m8767_regulator_desc(LDO25), 410 s5m8767_regulator_desc(LDO26), 411 s5m8767_regulator_desc(LDO27), 412 s5m8767_regulator_desc(LDO28), 413 s5m8767_regulator_desc(BUCK1), 414 s5m8767_regulator_desc(BUCK2), 415 s5m8767_regulator_desc(BUCK3), 416 s5m8767_regulator_desc(BUCK4), 417 s5m8767_regulator_desc(BUCK5), 418 s5m8767_regulator_desc(BUCK6), 419 s5m8767_regulator_buck78_desc(BUCK7), 420 s5m8767_regulator_buck78_desc(BUCK8), 421 s5m8767_regulator_desc(BUCK9), 422 }; 423 424 /* 425 * Enable GPIO control over BUCK9 in regulator_config for that regulator. 426 */ 427 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767, 428 struct sec_regulator_data *rdata, 429 struct regulator_config *config) 430 { 431 int i, mode = 0; 432 433 if (rdata->id != S5M8767_BUCK9) 434 return; 435 436 /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */ 437 for (i = 0; i < s5m8767->num_regulators; i++) { 438 const struct sec_opmode_data *opmode = &s5m8767->opmode[i]; 439 if (opmode->id == rdata->id) { 440 mode = s5m8767_opmode_reg[rdata->id][opmode->mode]; 441 break; 442 } 443 } 444 if (mode != S5M8767_ENCTRL_USE_GPIO) { 445 dev_warn(s5m8767->dev, 446 "ext-control for %pOFn: mismatched op_mode (%x), ignoring\n", 447 rdata->reg_node, mode); 448 return; 449 } 450 451 if (!rdata->ext_control_gpiod) { 452 dev_warn(s5m8767->dev, 453 "ext-control for %pOFn: GPIO not valid, ignoring\n", 454 rdata->reg_node); 455 return; 456 } 457 458 config->ena_gpiod = rdata->ext_control_gpiod; 459 } 460 461 /* 462 * Turn on GPIO control over BUCK9. 463 */ 464 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767, 465 struct regulator_dev *rdev) 466 { 467 int id = rdev_get_id(rdev); 468 int ret, reg, enable_ctrl; 469 470 if (id != S5M8767_BUCK9) 471 return -EINVAL; 472 473 ret = s5m8767_get_register(s5m8767, id, ®, &enable_ctrl); 474 if (ret) 475 return ret; 476 477 return regmap_update_bits(s5m8767->iodev->regmap_pmic, 478 reg, S5M8767_ENCTRL_MASK, 479 S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT); 480 } 481 482 483 #ifdef CONFIG_OF 484 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev, 485 struct sec_platform_data *pdata, 486 struct device_node *pmic_np) 487 { 488 int i, gpio; 489 490 for (i = 0; i < 3; i++) { 491 gpio = of_get_named_gpio(pmic_np, 492 "s5m8767,pmic-buck-dvs-gpios", i); 493 if (!gpio_is_valid(gpio)) { 494 dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); 495 return -EINVAL; 496 } 497 pdata->buck_gpios[i] = gpio; 498 } 499 return 0; 500 } 501 502 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev, 503 struct sec_platform_data *pdata, 504 struct device_node *pmic_np) 505 { 506 int i, gpio; 507 508 for (i = 0; i < 3; i++) { 509 gpio = of_get_named_gpio(pmic_np, 510 "s5m8767,pmic-buck-ds-gpios", i); 511 if (!gpio_is_valid(gpio)) { 512 dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); 513 return -EINVAL; 514 } 515 pdata->buck_ds[i] = gpio; 516 } 517 return 0; 518 } 519 520 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, 521 struct sec_platform_data *pdata) 522 { 523 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); 524 struct device_node *pmic_np, *regulators_np, *reg_np; 525 struct sec_regulator_data *rdata; 526 struct sec_opmode_data *rmode; 527 unsigned int i, dvs_voltage_nr = 8, ret; 528 529 pmic_np = iodev->dev->of_node; 530 if (!pmic_np) { 531 dev_err(iodev->dev, "could not find pmic sub-node\n"); 532 return -ENODEV; 533 } 534 535 regulators_np = of_get_child_by_name(pmic_np, "regulators"); 536 if (!regulators_np) { 537 dev_err(iodev->dev, "could not find regulators sub-node\n"); 538 return -EINVAL; 539 } 540 541 /* count the number of regulators to be supported in pmic */ 542 pdata->num_regulators = of_get_child_count(regulators_np); 543 544 rdata = devm_kcalloc(&pdev->dev, 545 pdata->num_regulators, sizeof(*rdata), 546 GFP_KERNEL); 547 if (!rdata) { 548 of_node_put(regulators_np); 549 return -ENOMEM; 550 } 551 552 rmode = devm_kcalloc(&pdev->dev, 553 pdata->num_regulators, sizeof(*rmode), 554 GFP_KERNEL); 555 if (!rmode) { 556 of_node_put(regulators_np); 557 return -ENOMEM; 558 } 559 560 pdata->regulators = rdata; 561 pdata->opmode = rmode; 562 for_each_child_of_node(regulators_np, reg_np) { 563 for (i = 0; i < ARRAY_SIZE(regulators); i++) 564 if (of_node_name_eq(reg_np, regulators[i].name)) 565 break; 566 567 if (i == ARRAY_SIZE(regulators)) { 568 dev_warn(iodev->dev, 569 "don't know how to configure regulator %pOFn\n", 570 reg_np); 571 continue; 572 } 573 574 rdata->ext_control_gpiod = devm_fwnode_gpiod_get( 575 &pdev->dev, 576 of_fwnode_handle(reg_np), 577 "s5m8767,pmic-ext-control", 578 GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE, 579 "s5m8767"); 580 if (PTR_ERR(rdata->ext_control_gpiod) == -ENOENT) { 581 rdata->ext_control_gpiod = NULL; 582 } else if (IS_ERR(rdata->ext_control_gpiod)) { 583 of_node_put(reg_np); 584 of_node_put(regulators_np); 585 return PTR_ERR(rdata->ext_control_gpiod); 586 } 587 588 rdata->id = i; 589 rdata->initdata = of_get_regulator_init_data( 590 &pdev->dev, reg_np, 591 ®ulators[i]); 592 rdata->reg_node = reg_np; 593 rdata++; 594 rmode->id = i; 595 if (of_property_read_u32(reg_np, "op_mode", 596 &rmode->mode)) { 597 dev_warn(iodev->dev, 598 "no op_mode property at %pOF\n", 599 reg_np); 600 601 rmode->mode = S5M8767_OPMODE_NORMAL_MODE; 602 } 603 rmode++; 604 } 605 606 of_node_put(regulators_np); 607 608 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) { 609 pdata->buck2_gpiodvs = true; 610 611 if (of_property_read_u32_array(pmic_np, 612 "s5m8767,pmic-buck2-dvs-voltage", 613 pdata->buck2_voltage, dvs_voltage_nr)) { 614 dev_err(iodev->dev, "buck2 voltages not specified\n"); 615 return -EINVAL; 616 } 617 } 618 619 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) { 620 pdata->buck3_gpiodvs = true; 621 622 if (of_property_read_u32_array(pmic_np, 623 "s5m8767,pmic-buck3-dvs-voltage", 624 pdata->buck3_voltage, dvs_voltage_nr)) { 625 dev_err(iodev->dev, "buck3 voltages not specified\n"); 626 return -EINVAL; 627 } 628 } 629 630 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) { 631 pdata->buck4_gpiodvs = true; 632 633 if (of_property_read_u32_array(pmic_np, 634 "s5m8767,pmic-buck4-dvs-voltage", 635 pdata->buck4_voltage, dvs_voltage_nr)) { 636 dev_err(iodev->dev, "buck4 voltages not specified\n"); 637 return -EINVAL; 638 } 639 } 640 641 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 642 pdata->buck4_gpiodvs) { 643 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); 644 if (ret) 645 return -EINVAL; 646 647 if (of_property_read_u32(pmic_np, 648 "s5m8767,pmic-buck-default-dvs-idx", 649 &pdata->buck_default_idx)) { 650 pdata->buck_default_idx = 0; 651 } else { 652 if (pdata->buck_default_idx >= 8) { 653 pdata->buck_default_idx = 0; 654 dev_info(iodev->dev, 655 "invalid value for default dvs index, use 0\n"); 656 } 657 } 658 } 659 660 ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np); 661 if (ret) 662 return -EINVAL; 663 664 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL)) 665 pdata->buck2_ramp_enable = true; 666 667 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL)) 668 pdata->buck3_ramp_enable = true; 669 670 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL)) 671 pdata->buck4_ramp_enable = true; 672 673 if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable 674 || pdata->buck4_ramp_enable) { 675 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay", 676 &pdata->buck_ramp_delay)) 677 pdata->buck_ramp_delay = 0; 678 } 679 680 return 0; 681 } 682 #else 683 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, 684 struct sec_platform_data *pdata) 685 { 686 return 0; 687 } 688 #endif /* CONFIG_OF */ 689 690 static int s5m8767_pmic_probe(struct platform_device *pdev) 691 { 692 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); 693 struct sec_platform_data *pdata = iodev->pdata; 694 struct regulator_config config = { }; 695 struct s5m8767_info *s5m8767; 696 int i, ret, buck_init; 697 698 if (!pdata) { 699 dev_err(pdev->dev.parent, "Platform data not supplied\n"); 700 return -ENODEV; 701 } 702 703 if (iodev->dev->of_node) { 704 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata); 705 if (ret) 706 return ret; 707 } 708 709 if (pdata->buck2_gpiodvs) { 710 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) { 711 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 712 return -EINVAL; 713 } 714 } 715 716 if (pdata->buck3_gpiodvs) { 717 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) { 718 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 719 return -EINVAL; 720 } 721 } 722 723 if (pdata->buck4_gpiodvs) { 724 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) { 725 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 726 return -EINVAL; 727 } 728 } 729 730 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info), 731 GFP_KERNEL); 732 if (!s5m8767) 733 return -ENOMEM; 734 735 s5m8767->dev = &pdev->dev; 736 s5m8767->iodev = iodev; 737 s5m8767->num_regulators = pdata->num_regulators; 738 platform_set_drvdata(pdev, s5m8767); 739 740 s5m8767->buck_gpioindex = pdata->buck_default_idx; 741 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs; 742 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs; 743 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs; 744 s5m8767->buck_gpios[0] = pdata->buck_gpios[0]; 745 s5m8767->buck_gpios[1] = pdata->buck_gpios[1]; 746 s5m8767->buck_gpios[2] = pdata->buck_gpios[2]; 747 s5m8767->buck_ds[0] = pdata->buck_ds[0]; 748 s5m8767->buck_ds[1] = pdata->buck_ds[1]; 749 s5m8767->buck_ds[2] = pdata->buck_ds[2]; 750 751 s5m8767->ramp_delay = pdata->buck_ramp_delay; 752 s5m8767->buck2_ramp = pdata->buck2_ramp_enable; 753 s5m8767->buck3_ramp = pdata->buck3_ramp_enable; 754 s5m8767->buck4_ramp = pdata->buck4_ramp_enable; 755 s5m8767->opmode = pdata->opmode; 756 757 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 758 pdata->buck2_init); 759 760 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2, 761 buck_init); 762 763 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 764 pdata->buck3_init); 765 766 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2, 767 buck_init); 768 769 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 770 pdata->buck4_init); 771 772 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2, 773 buck_init); 774 775 for (i = 0; i < 8; i++) { 776 if (s5m8767->buck2_gpiodvs) { 777 s5m8767->buck2_vol[i] = 778 s5m8767_convert_voltage_to_sel( 779 &buck_voltage_val2, 780 pdata->buck2_voltage[i]); 781 } 782 783 if (s5m8767->buck3_gpiodvs) { 784 s5m8767->buck3_vol[i] = 785 s5m8767_convert_voltage_to_sel( 786 &buck_voltage_val2, 787 pdata->buck3_voltage[i]); 788 } 789 790 if (s5m8767->buck4_gpiodvs) { 791 s5m8767->buck4_vol[i] = 792 s5m8767_convert_voltage_to_sel( 793 &buck_voltage_val2, 794 pdata->buck4_voltage[i]); 795 } 796 } 797 798 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 799 pdata->buck4_gpiodvs) { 800 801 if (!gpio_is_valid(pdata->buck_gpios[0]) || 802 !gpio_is_valid(pdata->buck_gpios[1]) || 803 !gpio_is_valid(pdata->buck_gpios[2])) { 804 dev_err(&pdev->dev, "GPIO NOT VALID\n"); 805 return -EINVAL; 806 } 807 808 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0], 809 "S5M8767 SET1"); 810 if (ret) 811 return ret; 812 813 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1], 814 "S5M8767 SET2"); 815 if (ret) 816 return ret; 817 818 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2], 819 "S5M8767 SET3"); 820 if (ret) 821 return ret; 822 823 /* SET1 GPIO */ 824 gpio_direction_output(pdata->buck_gpios[0], 825 (s5m8767->buck_gpioindex >> 2) & 0x1); 826 /* SET2 GPIO */ 827 gpio_direction_output(pdata->buck_gpios[1], 828 (s5m8767->buck_gpioindex >> 1) & 0x1); 829 /* SET3 GPIO */ 830 gpio_direction_output(pdata->buck_gpios[2], 831 (s5m8767->buck_gpioindex >> 0) & 0x1); 832 } 833 834 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2"); 835 if (ret) 836 return ret; 837 838 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3"); 839 if (ret) 840 return ret; 841 842 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4"); 843 if (ret) 844 return ret; 845 846 /* DS2 GPIO */ 847 gpio_direction_output(pdata->buck_ds[0], 0x0); 848 /* DS3 GPIO */ 849 gpio_direction_output(pdata->buck_ds[1], 0x0); 850 /* DS4 GPIO */ 851 gpio_direction_output(pdata->buck_ds[2], 0x0); 852 853 regmap_update_bits(s5m8767->iodev->regmap_pmic, 854 S5M8767_REG_BUCK2CTRL, 1 << 1, 855 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1)); 856 regmap_update_bits(s5m8767->iodev->regmap_pmic, 857 S5M8767_REG_BUCK3CTRL, 1 << 1, 858 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1)); 859 regmap_update_bits(s5m8767->iodev->regmap_pmic, 860 S5M8767_REG_BUCK4CTRL, 1 << 1, 861 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1)); 862 863 /* Initialize GPIO DVS registers */ 864 for (i = 0; i < 8; i++) { 865 if (s5m8767->buck2_gpiodvs) { 866 regmap_write(s5m8767->iodev->regmap_pmic, 867 S5M8767_REG_BUCK2DVS1 + i, 868 s5m8767->buck2_vol[i]); 869 } 870 871 if (s5m8767->buck3_gpiodvs) { 872 regmap_write(s5m8767->iodev->regmap_pmic, 873 S5M8767_REG_BUCK3DVS1 + i, 874 s5m8767->buck3_vol[i]); 875 } 876 877 if (s5m8767->buck4_gpiodvs) { 878 regmap_write(s5m8767->iodev->regmap_pmic, 879 S5M8767_REG_BUCK4DVS1 + i, 880 s5m8767->buck4_vol[i]); 881 } 882 } 883 884 if (s5m8767->buck2_ramp) 885 regmap_update_bits(s5m8767->iodev->regmap_pmic, 886 S5M8767_REG_DVSRAMP, 0x08, 0x08); 887 888 if (s5m8767->buck3_ramp) 889 regmap_update_bits(s5m8767->iodev->regmap_pmic, 890 S5M8767_REG_DVSRAMP, 0x04, 0x04); 891 892 if (s5m8767->buck4_ramp) 893 regmap_update_bits(s5m8767->iodev->regmap_pmic, 894 S5M8767_REG_DVSRAMP, 0x02, 0x02); 895 896 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp 897 || s5m8767->buck4_ramp) { 898 unsigned int val; 899 switch (s5m8767->ramp_delay) { 900 case 5: 901 val = S5M8767_DVS_BUCK_RAMP_5; 902 break; 903 case 10: 904 val = S5M8767_DVS_BUCK_RAMP_10; 905 break; 906 case 25: 907 val = S5M8767_DVS_BUCK_RAMP_25; 908 break; 909 case 50: 910 val = S5M8767_DVS_BUCK_RAMP_50; 911 break; 912 case 100: 913 val = S5M8767_DVS_BUCK_RAMP_100; 914 break; 915 default: 916 val = S5M8767_DVS_BUCK_RAMP_10; 917 } 918 regmap_update_bits(s5m8767->iodev->regmap_pmic, 919 S5M8767_REG_DVSRAMP, 920 S5M8767_DVS_BUCK_RAMP_MASK, 921 val << S5M8767_DVS_BUCK_RAMP_SHIFT); 922 } 923 924 for (i = 0; i < pdata->num_regulators; i++) { 925 const struct sec_voltage_desc *desc; 926 int id = pdata->regulators[i].id; 927 int enable_reg, enable_val; 928 struct regulator_dev *rdev; 929 930 desc = reg_voltage_map[id]; 931 if (desc) { 932 regulators[id].n_voltages = 933 (desc->max - desc->min) / desc->step + 1; 934 regulators[id].min_uV = desc->min; 935 regulators[id].uV_step = desc->step; 936 regulators[id].vsel_reg = 937 s5m8767_get_vsel_reg(id, s5m8767); 938 if (id < S5M8767_BUCK1) 939 regulators[id].vsel_mask = 0x3f; 940 else 941 regulators[id].vsel_mask = 0xff; 942 943 ret = s5m8767_get_register(s5m8767, id, &enable_reg, 944 &enable_val); 945 if (ret) { 946 dev_err(s5m8767->dev, "error reading registers\n"); 947 return ret; 948 } 949 regulators[id].enable_reg = enable_reg; 950 regulators[id].enable_mask = S5M8767_ENCTRL_MASK; 951 regulators[id].enable_val = enable_val; 952 } 953 954 config.dev = s5m8767->dev; 955 config.init_data = pdata->regulators[i].initdata; 956 config.driver_data = s5m8767; 957 config.regmap = iodev->regmap_pmic; 958 config.of_node = pdata->regulators[i].reg_node; 959 config.ena_gpiod = NULL; 960 if (pdata->regulators[i].ext_control_gpiod) { 961 /* Assigns config.ena_gpiod */ 962 s5m8767_regulator_config_ext_control(s5m8767, 963 &pdata->regulators[i], &config); 964 965 /* 966 * Hand the GPIO descriptor management over to the 967 * regulator core, remove it from devres management. 968 */ 969 devm_gpiod_unhinge(s5m8767->dev, config.ena_gpiod); 970 } 971 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], 972 &config); 973 if (IS_ERR(rdev)) { 974 ret = PTR_ERR(rdev); 975 dev_err(s5m8767->dev, "regulator init failed for %d\n", 976 id); 977 return ret; 978 } 979 980 if (pdata->regulators[i].ext_control_gpiod) { 981 ret = s5m8767_enable_ext_control(s5m8767, rdev); 982 if (ret < 0) { 983 dev_err(s5m8767->dev, 984 "failed to enable gpio control over %s: %d\n", 985 rdev->desc->name, ret); 986 return ret; 987 } 988 } 989 } 990 991 return 0; 992 } 993 994 static const struct platform_device_id s5m8767_pmic_id[] = { 995 { "s5m8767-pmic", 0}, 996 { }, 997 }; 998 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id); 999 1000 static struct platform_driver s5m8767_pmic_driver = { 1001 .driver = { 1002 .name = "s5m8767-pmic", 1003 }, 1004 .probe = s5m8767_pmic_probe, 1005 .id_table = s5m8767_pmic_id, 1006 }; 1007 module_platform_driver(s5m8767_pmic_driver); 1008 1009 /* Module information */ 1010 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 1011 MODULE_DESCRIPTION("Samsung S5M8767 Regulator Driver"); 1012 MODULE_LICENSE("GPL"); 1013