1 /* 2 * s5m8767.c 3 * 4 * Copyright (c) 2011 Samsung Electronics Co., Ltd 5 * http://www.samsung.com 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 */ 13 14 #include <linux/err.h> 15 #include <linux/of_gpio.h> 16 #include <linux/gpio/consumer.h> 17 #include <linux/module.h> 18 #include <linux/platform_device.h> 19 #include <linux/regulator/driver.h> 20 #include <linux/regulator/machine.h> 21 #include <linux/mfd/samsung/core.h> 22 #include <linux/mfd/samsung/s5m8767.h> 23 #include <linux/regulator/of_regulator.h> 24 #include <linux/regmap.h> 25 26 #define S5M8767_OPMODE_NORMAL_MODE 0x1 27 28 struct s5m8767_info { 29 struct device *dev; 30 struct sec_pmic_dev *iodev; 31 int num_regulators; 32 struct sec_opmode_data *opmode; 33 34 int ramp_delay; 35 bool buck2_ramp; 36 bool buck3_ramp; 37 bool buck4_ramp; 38 39 bool buck2_gpiodvs; 40 bool buck3_gpiodvs; 41 bool buck4_gpiodvs; 42 u8 buck2_vol[8]; 43 u8 buck3_vol[8]; 44 u8 buck4_vol[8]; 45 int buck_gpios[3]; 46 int buck_ds[3]; 47 int buck_gpioindex; 48 }; 49 50 struct sec_voltage_desc { 51 int max; 52 int min; 53 int step; 54 }; 55 56 static const struct sec_voltage_desc buck_voltage_val1 = { 57 .max = 2225000, 58 .min = 650000, 59 .step = 6250, 60 }; 61 62 static const struct sec_voltage_desc buck_voltage_val2 = { 63 .max = 1600000, 64 .min = 600000, 65 .step = 6250, 66 }; 67 68 static const struct sec_voltage_desc buck_voltage_val3 = { 69 .max = 3000000, 70 .min = 750000, 71 .step = 12500, 72 }; 73 74 static const struct sec_voltage_desc ldo_voltage_val1 = { 75 .max = 3950000, 76 .min = 800000, 77 .step = 50000, 78 }; 79 80 static const struct sec_voltage_desc ldo_voltage_val2 = { 81 .max = 2375000, 82 .min = 800000, 83 .step = 25000, 84 }; 85 86 static const struct sec_voltage_desc *reg_voltage_map[] = { 87 [S5M8767_LDO1] = &ldo_voltage_val2, 88 [S5M8767_LDO2] = &ldo_voltage_val2, 89 [S5M8767_LDO3] = &ldo_voltage_val1, 90 [S5M8767_LDO4] = &ldo_voltage_val1, 91 [S5M8767_LDO5] = &ldo_voltage_val1, 92 [S5M8767_LDO6] = &ldo_voltage_val2, 93 [S5M8767_LDO7] = &ldo_voltage_val2, 94 [S5M8767_LDO8] = &ldo_voltage_val2, 95 [S5M8767_LDO9] = &ldo_voltage_val1, 96 [S5M8767_LDO10] = &ldo_voltage_val1, 97 [S5M8767_LDO11] = &ldo_voltage_val1, 98 [S5M8767_LDO12] = &ldo_voltage_val1, 99 [S5M8767_LDO13] = &ldo_voltage_val1, 100 [S5M8767_LDO14] = &ldo_voltage_val1, 101 [S5M8767_LDO15] = &ldo_voltage_val2, 102 [S5M8767_LDO16] = &ldo_voltage_val1, 103 [S5M8767_LDO17] = &ldo_voltage_val1, 104 [S5M8767_LDO18] = &ldo_voltage_val1, 105 [S5M8767_LDO19] = &ldo_voltage_val1, 106 [S5M8767_LDO20] = &ldo_voltage_val1, 107 [S5M8767_LDO21] = &ldo_voltage_val1, 108 [S5M8767_LDO22] = &ldo_voltage_val1, 109 [S5M8767_LDO23] = &ldo_voltage_val1, 110 [S5M8767_LDO24] = &ldo_voltage_val1, 111 [S5M8767_LDO25] = &ldo_voltage_val1, 112 [S5M8767_LDO26] = &ldo_voltage_val1, 113 [S5M8767_LDO27] = &ldo_voltage_val1, 114 [S5M8767_LDO28] = &ldo_voltage_val1, 115 [S5M8767_BUCK1] = &buck_voltage_val1, 116 [S5M8767_BUCK2] = &buck_voltage_val2, 117 [S5M8767_BUCK3] = &buck_voltage_val2, 118 [S5M8767_BUCK4] = &buck_voltage_val2, 119 [S5M8767_BUCK5] = &buck_voltage_val1, 120 [S5M8767_BUCK6] = &buck_voltage_val1, 121 [S5M8767_BUCK7] = &buck_voltage_val3, 122 [S5M8767_BUCK8] = &buck_voltage_val3, 123 [S5M8767_BUCK9] = &buck_voltage_val3, 124 }; 125 126 static unsigned int s5m8767_opmode_reg[][4] = { 127 /* {OFF, ON, LOWPOWER, SUSPEND} */ 128 /* LDO1 ... LDO28 */ 129 {0x0, 0x3, 0x2, 0x1}, /* LDO1 */ 130 {0x0, 0x3, 0x2, 0x1}, 131 {0x0, 0x3, 0x2, 0x1}, 132 {0x0, 0x0, 0x0, 0x0}, 133 {0x0, 0x3, 0x2, 0x1}, /* LDO5 */ 134 {0x0, 0x3, 0x2, 0x1}, 135 {0x0, 0x3, 0x2, 0x1}, 136 {0x0, 0x3, 0x2, 0x1}, 137 {0x0, 0x3, 0x2, 0x1}, 138 {0x0, 0x3, 0x2, 0x1}, /* LDO10 */ 139 {0x0, 0x3, 0x2, 0x1}, 140 {0x0, 0x3, 0x2, 0x1}, 141 {0x0, 0x3, 0x2, 0x1}, 142 {0x0, 0x3, 0x2, 0x1}, 143 {0x0, 0x3, 0x2, 0x1}, /* LDO15 */ 144 {0x0, 0x3, 0x2, 0x1}, 145 {0x0, 0x3, 0x2, 0x1}, 146 {0x0, 0x0, 0x0, 0x0}, 147 {0x0, 0x3, 0x2, 0x1}, 148 {0x0, 0x3, 0x2, 0x1}, /* LDO20 */ 149 {0x0, 0x3, 0x2, 0x1}, 150 {0x0, 0x3, 0x2, 0x1}, 151 {0x0, 0x0, 0x0, 0x0}, 152 {0x0, 0x3, 0x2, 0x1}, 153 {0x0, 0x3, 0x2, 0x1}, /* LDO25 */ 154 {0x0, 0x3, 0x2, 0x1}, 155 {0x0, 0x3, 0x2, 0x1}, 156 {0x0, 0x3, 0x2, 0x1}, /* LDO28 */ 157 158 /* BUCK1 ... BUCK9 */ 159 {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */ 160 {0x0, 0x3, 0x1, 0x1}, 161 {0x0, 0x3, 0x1, 0x1}, 162 {0x0, 0x3, 0x1, 0x1}, 163 {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */ 164 {0x0, 0x3, 0x1, 0x1}, 165 {0x0, 0x3, 0x1, 0x1}, 166 {0x0, 0x3, 0x1, 0x1}, 167 {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */ 168 }; 169 170 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id, 171 int *reg, int *enable_ctrl) 172 { 173 int i; 174 unsigned int mode; 175 176 switch (reg_id) { 177 case S5M8767_LDO1 ... S5M8767_LDO2: 178 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1); 179 break; 180 case S5M8767_LDO3 ... S5M8767_LDO28: 181 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3); 182 break; 183 case S5M8767_BUCK1: 184 *reg = S5M8767_REG_BUCK1CTRL1; 185 break; 186 case S5M8767_BUCK2 ... S5M8767_BUCK4: 187 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9; 188 break; 189 case S5M8767_BUCK5: 190 *reg = S5M8767_REG_BUCK5CTRL1; 191 break; 192 case S5M8767_BUCK6 ... S5M8767_BUCK9: 193 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2; 194 break; 195 default: 196 return -EINVAL; 197 } 198 199 for (i = 0; i < s5m8767->num_regulators; i++) { 200 if (s5m8767->opmode[i].id == reg_id) { 201 mode = s5m8767->opmode[i].mode; 202 break; 203 } 204 } 205 206 if (i >= s5m8767->num_regulators) 207 return -EINVAL; 208 209 *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT; 210 211 return 0; 212 } 213 214 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767) 215 { 216 int reg; 217 218 switch (reg_id) { 219 case S5M8767_LDO1 ... S5M8767_LDO2: 220 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1); 221 break; 222 case S5M8767_LDO3 ... S5M8767_LDO28: 223 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3); 224 break; 225 case S5M8767_BUCK1: 226 reg = S5M8767_REG_BUCK1CTRL2; 227 break; 228 case S5M8767_BUCK2: 229 reg = S5M8767_REG_BUCK2DVS1; 230 if (s5m8767->buck2_gpiodvs) 231 reg += s5m8767->buck_gpioindex; 232 break; 233 case S5M8767_BUCK3: 234 reg = S5M8767_REG_BUCK3DVS1; 235 if (s5m8767->buck3_gpiodvs) 236 reg += s5m8767->buck_gpioindex; 237 break; 238 case S5M8767_BUCK4: 239 reg = S5M8767_REG_BUCK4DVS1; 240 if (s5m8767->buck4_gpiodvs) 241 reg += s5m8767->buck_gpioindex; 242 break; 243 case S5M8767_BUCK5: 244 reg = S5M8767_REG_BUCK5CTRL2; 245 break; 246 case S5M8767_BUCK6 ... S5M8767_BUCK9: 247 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2; 248 break; 249 default: 250 return -EINVAL; 251 } 252 253 return reg; 254 } 255 256 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc, 257 int min_vol) 258 { 259 int selector = 0; 260 261 if (desc == NULL) 262 return -EINVAL; 263 264 if (min_vol > desc->max) 265 return -EINVAL; 266 267 if (min_vol < desc->min) 268 min_vol = desc->min; 269 270 selector = DIV_ROUND_UP(min_vol - desc->min, desc->step); 271 272 if (desc->min + desc->step * selector > desc->max) 273 return -EINVAL; 274 275 return selector; 276 } 277 278 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767) 279 { 280 int temp_index = s5m8767->buck_gpioindex; 281 282 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1); 283 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1); 284 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1); 285 286 return 0; 287 } 288 289 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767) 290 { 291 int temp_index = s5m8767->buck_gpioindex; 292 293 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1); 294 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1); 295 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1); 296 297 return 0; 298 } 299 300 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev, 301 unsigned selector) 302 { 303 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev); 304 int reg_id = rdev_get_id(rdev); 305 int old_index, index = 0; 306 u8 *buck234_vol = NULL; 307 308 switch (reg_id) { 309 case S5M8767_LDO1 ... S5M8767_LDO28: 310 break; 311 case S5M8767_BUCK1 ... S5M8767_BUCK6: 312 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs) 313 buck234_vol = &s5m8767->buck2_vol[0]; 314 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs) 315 buck234_vol = &s5m8767->buck3_vol[0]; 316 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs) 317 buck234_vol = &s5m8767->buck4_vol[0]; 318 break; 319 case S5M8767_BUCK7 ... S5M8767_BUCK8: 320 return -EINVAL; 321 case S5M8767_BUCK9: 322 break; 323 default: 324 return -EINVAL; 325 } 326 327 /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */ 328 if (buck234_vol) { 329 while (*buck234_vol != selector) { 330 buck234_vol++; 331 index++; 332 } 333 old_index = s5m8767->buck_gpioindex; 334 s5m8767->buck_gpioindex = index; 335 336 if (index > old_index) 337 return s5m8767_set_high(s5m8767); 338 else 339 return s5m8767_set_low(s5m8767); 340 } else { 341 return regulator_set_voltage_sel_regmap(rdev, selector); 342 } 343 } 344 345 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev, 346 unsigned int old_sel, 347 unsigned int new_sel) 348 { 349 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev); 350 const struct sec_voltage_desc *desc; 351 int reg_id = rdev_get_id(rdev); 352 353 desc = reg_voltage_map[reg_id]; 354 355 if ((old_sel < new_sel) && s5m8767->ramp_delay) 356 return DIV_ROUND_UP(desc->step * (new_sel - old_sel), 357 s5m8767->ramp_delay * 1000); 358 return 0; 359 } 360 361 static const struct regulator_ops s5m8767_ops = { 362 .list_voltage = regulator_list_voltage_linear, 363 .is_enabled = regulator_is_enabled_regmap, 364 .enable = regulator_enable_regmap, 365 .disable = regulator_disable_regmap, 366 .get_voltage_sel = regulator_get_voltage_sel_regmap, 367 .set_voltage_sel = s5m8767_set_voltage_sel, 368 .set_voltage_time_sel = s5m8767_set_voltage_time_sel, 369 }; 370 371 static const struct regulator_ops s5m8767_buck78_ops = { 372 .list_voltage = regulator_list_voltage_linear, 373 .is_enabled = regulator_is_enabled_regmap, 374 .enable = regulator_enable_regmap, 375 .disable = regulator_disable_regmap, 376 .get_voltage_sel = regulator_get_voltage_sel_regmap, 377 .set_voltage_sel = regulator_set_voltage_sel_regmap, 378 }; 379 380 #define s5m8767_regulator_desc(_name) { \ 381 .name = #_name, \ 382 .id = S5M8767_##_name, \ 383 .ops = &s5m8767_ops, \ 384 .type = REGULATOR_VOLTAGE, \ 385 .owner = THIS_MODULE, \ 386 } 387 388 #define s5m8767_regulator_buck78_desc(_name) { \ 389 .name = #_name, \ 390 .id = S5M8767_##_name, \ 391 .ops = &s5m8767_buck78_ops, \ 392 .type = REGULATOR_VOLTAGE, \ 393 .owner = THIS_MODULE, \ 394 } 395 396 static struct regulator_desc regulators[] = { 397 s5m8767_regulator_desc(LDO1), 398 s5m8767_regulator_desc(LDO2), 399 s5m8767_regulator_desc(LDO3), 400 s5m8767_regulator_desc(LDO4), 401 s5m8767_regulator_desc(LDO5), 402 s5m8767_regulator_desc(LDO6), 403 s5m8767_regulator_desc(LDO7), 404 s5m8767_regulator_desc(LDO8), 405 s5m8767_regulator_desc(LDO9), 406 s5m8767_regulator_desc(LDO10), 407 s5m8767_regulator_desc(LDO11), 408 s5m8767_regulator_desc(LDO12), 409 s5m8767_regulator_desc(LDO13), 410 s5m8767_regulator_desc(LDO14), 411 s5m8767_regulator_desc(LDO15), 412 s5m8767_regulator_desc(LDO16), 413 s5m8767_regulator_desc(LDO17), 414 s5m8767_regulator_desc(LDO18), 415 s5m8767_regulator_desc(LDO19), 416 s5m8767_regulator_desc(LDO20), 417 s5m8767_regulator_desc(LDO21), 418 s5m8767_regulator_desc(LDO22), 419 s5m8767_regulator_desc(LDO23), 420 s5m8767_regulator_desc(LDO24), 421 s5m8767_regulator_desc(LDO25), 422 s5m8767_regulator_desc(LDO26), 423 s5m8767_regulator_desc(LDO27), 424 s5m8767_regulator_desc(LDO28), 425 s5m8767_regulator_desc(BUCK1), 426 s5m8767_regulator_desc(BUCK2), 427 s5m8767_regulator_desc(BUCK3), 428 s5m8767_regulator_desc(BUCK4), 429 s5m8767_regulator_desc(BUCK5), 430 s5m8767_regulator_desc(BUCK6), 431 s5m8767_regulator_buck78_desc(BUCK7), 432 s5m8767_regulator_buck78_desc(BUCK8), 433 s5m8767_regulator_desc(BUCK9), 434 }; 435 436 /* 437 * Enable GPIO control over BUCK9 in regulator_config for that regulator. 438 */ 439 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767, 440 struct sec_regulator_data *rdata, 441 struct regulator_config *config) 442 { 443 int i, mode = 0; 444 445 if (rdata->id != S5M8767_BUCK9) 446 return; 447 448 /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */ 449 for (i = 0; i < s5m8767->num_regulators; i++) { 450 const struct sec_opmode_data *opmode = &s5m8767->opmode[i]; 451 if (opmode->id == rdata->id) { 452 mode = s5m8767_opmode_reg[rdata->id][opmode->mode]; 453 break; 454 } 455 } 456 if (mode != S5M8767_ENCTRL_USE_GPIO) { 457 dev_warn(s5m8767->dev, 458 "ext-control for %s: mismatched op_mode (%x), ignoring\n", 459 rdata->reg_node->name, mode); 460 return; 461 } 462 463 if (!rdata->ext_control_gpiod) { 464 dev_warn(s5m8767->dev, 465 "ext-control for %s: GPIO not valid, ignoring\n", 466 rdata->reg_node->name); 467 return; 468 } 469 470 config->ena_gpiod = rdata->ext_control_gpiod; 471 } 472 473 /* 474 * Turn on GPIO control over BUCK9. 475 */ 476 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767, 477 struct regulator_dev *rdev) 478 { 479 int id = rdev_get_id(rdev); 480 int ret, reg, enable_ctrl; 481 482 if (id != S5M8767_BUCK9) 483 return -EINVAL; 484 485 ret = s5m8767_get_register(s5m8767, id, ®, &enable_ctrl); 486 if (ret) 487 return ret; 488 489 return regmap_update_bits(s5m8767->iodev->regmap_pmic, 490 reg, S5M8767_ENCTRL_MASK, 491 S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT); 492 } 493 494 495 #ifdef CONFIG_OF 496 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev, 497 struct sec_platform_data *pdata, 498 struct device_node *pmic_np) 499 { 500 int i, gpio; 501 502 for (i = 0; i < 3; i++) { 503 gpio = of_get_named_gpio(pmic_np, 504 "s5m8767,pmic-buck-dvs-gpios", i); 505 if (!gpio_is_valid(gpio)) { 506 dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); 507 return -EINVAL; 508 } 509 pdata->buck_gpios[i] = gpio; 510 } 511 return 0; 512 } 513 514 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev, 515 struct sec_platform_data *pdata, 516 struct device_node *pmic_np) 517 { 518 int i, gpio; 519 520 for (i = 0; i < 3; i++) { 521 gpio = of_get_named_gpio(pmic_np, 522 "s5m8767,pmic-buck-ds-gpios", i); 523 if (!gpio_is_valid(gpio)) { 524 dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); 525 return -EINVAL; 526 } 527 pdata->buck_ds[i] = gpio; 528 } 529 return 0; 530 } 531 532 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, 533 struct sec_platform_data *pdata) 534 { 535 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); 536 struct device_node *pmic_np, *regulators_np, *reg_np; 537 struct sec_regulator_data *rdata; 538 struct sec_opmode_data *rmode; 539 unsigned int i, dvs_voltage_nr = 8, ret; 540 541 pmic_np = iodev->dev->of_node; 542 if (!pmic_np) { 543 dev_err(iodev->dev, "could not find pmic sub-node\n"); 544 return -ENODEV; 545 } 546 547 regulators_np = of_get_child_by_name(pmic_np, "regulators"); 548 if (!regulators_np) { 549 dev_err(iodev->dev, "could not find regulators sub-node\n"); 550 return -EINVAL; 551 } 552 553 /* count the number of regulators to be supported in pmic */ 554 pdata->num_regulators = of_get_child_count(regulators_np); 555 556 rdata = devm_kcalloc(&pdev->dev, 557 pdata->num_regulators, sizeof(*rdata), 558 GFP_KERNEL); 559 if (!rdata) 560 return -ENOMEM; 561 562 rmode = devm_kcalloc(&pdev->dev, 563 pdata->num_regulators, sizeof(*rmode), 564 GFP_KERNEL); 565 if (!rmode) 566 return -ENOMEM; 567 568 pdata->regulators = rdata; 569 pdata->opmode = rmode; 570 for_each_child_of_node(regulators_np, reg_np) { 571 for (i = 0; i < ARRAY_SIZE(regulators); i++) 572 if (!of_node_cmp(reg_np->name, regulators[i].name)) 573 break; 574 575 if (i == ARRAY_SIZE(regulators)) { 576 dev_warn(iodev->dev, 577 "don't know how to configure regulator %s\n", 578 reg_np->name); 579 continue; 580 } 581 582 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev, 583 reg_np, 584 "s5m8767,pmic-ext-control-gpios", 585 0, 586 GPIOD_OUT_HIGH, 587 "s5m8767"); 588 if (IS_ERR(rdata->ext_control_gpiod)) 589 return PTR_ERR(rdata->ext_control_gpiod); 590 591 rdata->id = i; 592 rdata->initdata = of_get_regulator_init_data( 593 &pdev->dev, reg_np, 594 ®ulators[i]); 595 rdata->reg_node = reg_np; 596 rdata++; 597 rmode->id = i; 598 if (of_property_read_u32(reg_np, "op_mode", 599 &rmode->mode)) { 600 dev_warn(iodev->dev, 601 "no op_mode property property at %pOF\n", 602 reg_np); 603 604 rmode->mode = S5M8767_OPMODE_NORMAL_MODE; 605 } 606 rmode++; 607 } 608 609 of_node_put(regulators_np); 610 611 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) { 612 pdata->buck2_gpiodvs = true; 613 614 if (of_property_read_u32_array(pmic_np, 615 "s5m8767,pmic-buck2-dvs-voltage", 616 pdata->buck2_voltage, dvs_voltage_nr)) { 617 dev_err(iodev->dev, "buck2 voltages not specified\n"); 618 return -EINVAL; 619 } 620 } 621 622 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) { 623 pdata->buck3_gpiodvs = true; 624 625 if (of_property_read_u32_array(pmic_np, 626 "s5m8767,pmic-buck3-dvs-voltage", 627 pdata->buck3_voltage, dvs_voltage_nr)) { 628 dev_err(iodev->dev, "buck3 voltages not specified\n"); 629 return -EINVAL; 630 } 631 } 632 633 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) { 634 pdata->buck4_gpiodvs = true; 635 636 if (of_property_read_u32_array(pmic_np, 637 "s5m8767,pmic-buck4-dvs-voltage", 638 pdata->buck4_voltage, dvs_voltage_nr)) { 639 dev_err(iodev->dev, "buck4 voltages not specified\n"); 640 return -EINVAL; 641 } 642 } 643 644 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 645 pdata->buck4_gpiodvs) { 646 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); 647 if (ret) 648 return -EINVAL; 649 650 if (of_property_read_u32(pmic_np, 651 "s5m8767,pmic-buck-default-dvs-idx", 652 &pdata->buck_default_idx)) { 653 pdata->buck_default_idx = 0; 654 } else { 655 if (pdata->buck_default_idx >= 8) { 656 pdata->buck_default_idx = 0; 657 dev_info(iodev->dev, 658 "invalid value for default dvs index, use 0\n"); 659 } 660 } 661 } 662 663 ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np); 664 if (ret) 665 return -EINVAL; 666 667 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL)) 668 pdata->buck2_ramp_enable = true; 669 670 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL)) 671 pdata->buck3_ramp_enable = true; 672 673 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL)) 674 pdata->buck4_ramp_enable = true; 675 676 if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable 677 || pdata->buck4_ramp_enable) { 678 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay", 679 &pdata->buck_ramp_delay)) 680 pdata->buck_ramp_delay = 0; 681 } 682 683 return 0; 684 } 685 #else 686 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, 687 struct sec_platform_data *pdata) 688 { 689 return 0; 690 } 691 #endif /* CONFIG_OF */ 692 693 static int s5m8767_pmic_probe(struct platform_device *pdev) 694 { 695 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); 696 struct sec_platform_data *pdata = iodev->pdata; 697 struct regulator_config config = { }; 698 struct s5m8767_info *s5m8767; 699 int i, ret, buck_init; 700 701 if (!pdata) { 702 dev_err(pdev->dev.parent, "Platform data not supplied\n"); 703 return -ENODEV; 704 } 705 706 if (iodev->dev->of_node) { 707 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata); 708 if (ret) 709 return ret; 710 } 711 712 if (pdata->buck2_gpiodvs) { 713 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) { 714 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 715 return -EINVAL; 716 } 717 } 718 719 if (pdata->buck3_gpiodvs) { 720 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) { 721 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 722 return -EINVAL; 723 } 724 } 725 726 if (pdata->buck4_gpiodvs) { 727 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) { 728 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 729 return -EINVAL; 730 } 731 } 732 733 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info), 734 GFP_KERNEL); 735 if (!s5m8767) 736 return -ENOMEM; 737 738 s5m8767->dev = &pdev->dev; 739 s5m8767->iodev = iodev; 740 s5m8767->num_regulators = pdata->num_regulators; 741 platform_set_drvdata(pdev, s5m8767); 742 743 s5m8767->buck_gpioindex = pdata->buck_default_idx; 744 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs; 745 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs; 746 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs; 747 s5m8767->buck_gpios[0] = pdata->buck_gpios[0]; 748 s5m8767->buck_gpios[1] = pdata->buck_gpios[1]; 749 s5m8767->buck_gpios[2] = pdata->buck_gpios[2]; 750 s5m8767->buck_ds[0] = pdata->buck_ds[0]; 751 s5m8767->buck_ds[1] = pdata->buck_ds[1]; 752 s5m8767->buck_ds[2] = pdata->buck_ds[2]; 753 754 s5m8767->ramp_delay = pdata->buck_ramp_delay; 755 s5m8767->buck2_ramp = pdata->buck2_ramp_enable; 756 s5m8767->buck3_ramp = pdata->buck3_ramp_enable; 757 s5m8767->buck4_ramp = pdata->buck4_ramp_enable; 758 s5m8767->opmode = pdata->opmode; 759 760 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 761 pdata->buck2_init); 762 763 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2, 764 buck_init); 765 766 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 767 pdata->buck3_init); 768 769 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2, 770 buck_init); 771 772 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 773 pdata->buck4_init); 774 775 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2, 776 buck_init); 777 778 for (i = 0; i < 8; i++) { 779 if (s5m8767->buck2_gpiodvs) { 780 s5m8767->buck2_vol[i] = 781 s5m8767_convert_voltage_to_sel( 782 &buck_voltage_val2, 783 pdata->buck2_voltage[i]); 784 } 785 786 if (s5m8767->buck3_gpiodvs) { 787 s5m8767->buck3_vol[i] = 788 s5m8767_convert_voltage_to_sel( 789 &buck_voltage_val2, 790 pdata->buck3_voltage[i]); 791 } 792 793 if (s5m8767->buck4_gpiodvs) { 794 s5m8767->buck4_vol[i] = 795 s5m8767_convert_voltage_to_sel( 796 &buck_voltage_val2, 797 pdata->buck4_voltage[i]); 798 } 799 } 800 801 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 802 pdata->buck4_gpiodvs) { 803 804 if (!gpio_is_valid(pdata->buck_gpios[0]) || 805 !gpio_is_valid(pdata->buck_gpios[1]) || 806 !gpio_is_valid(pdata->buck_gpios[2])) { 807 dev_err(&pdev->dev, "GPIO NOT VALID\n"); 808 return -EINVAL; 809 } 810 811 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0], 812 "S5M8767 SET1"); 813 if (ret) 814 return ret; 815 816 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1], 817 "S5M8767 SET2"); 818 if (ret) 819 return ret; 820 821 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2], 822 "S5M8767 SET3"); 823 if (ret) 824 return ret; 825 826 /* SET1 GPIO */ 827 gpio_direction_output(pdata->buck_gpios[0], 828 (s5m8767->buck_gpioindex >> 2) & 0x1); 829 /* SET2 GPIO */ 830 gpio_direction_output(pdata->buck_gpios[1], 831 (s5m8767->buck_gpioindex >> 1) & 0x1); 832 /* SET3 GPIO */ 833 gpio_direction_output(pdata->buck_gpios[2], 834 (s5m8767->buck_gpioindex >> 0) & 0x1); 835 } 836 837 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2"); 838 if (ret) 839 return ret; 840 841 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3"); 842 if (ret) 843 return ret; 844 845 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4"); 846 if (ret) 847 return ret; 848 849 /* DS2 GPIO */ 850 gpio_direction_output(pdata->buck_ds[0], 0x0); 851 /* DS3 GPIO */ 852 gpio_direction_output(pdata->buck_ds[1], 0x0); 853 /* DS4 GPIO */ 854 gpio_direction_output(pdata->buck_ds[2], 0x0); 855 856 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 857 pdata->buck4_gpiodvs) { 858 regmap_update_bits(s5m8767->iodev->regmap_pmic, 859 S5M8767_REG_BUCK2CTRL, 1 << 1, 860 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1)); 861 regmap_update_bits(s5m8767->iodev->regmap_pmic, 862 S5M8767_REG_BUCK3CTRL, 1 << 1, 863 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1)); 864 regmap_update_bits(s5m8767->iodev->regmap_pmic, 865 S5M8767_REG_BUCK4CTRL, 1 << 1, 866 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1)); 867 } 868 869 /* Initialize GPIO DVS registers */ 870 for (i = 0; i < 8; i++) { 871 if (s5m8767->buck2_gpiodvs) { 872 regmap_write(s5m8767->iodev->regmap_pmic, 873 S5M8767_REG_BUCK2DVS1 + i, 874 s5m8767->buck2_vol[i]); 875 } 876 877 if (s5m8767->buck3_gpiodvs) { 878 regmap_write(s5m8767->iodev->regmap_pmic, 879 S5M8767_REG_BUCK3DVS1 + i, 880 s5m8767->buck3_vol[i]); 881 } 882 883 if (s5m8767->buck4_gpiodvs) { 884 regmap_write(s5m8767->iodev->regmap_pmic, 885 S5M8767_REG_BUCK4DVS1 + i, 886 s5m8767->buck4_vol[i]); 887 } 888 } 889 890 if (s5m8767->buck2_ramp) 891 regmap_update_bits(s5m8767->iodev->regmap_pmic, 892 S5M8767_REG_DVSRAMP, 0x08, 0x08); 893 894 if (s5m8767->buck3_ramp) 895 regmap_update_bits(s5m8767->iodev->regmap_pmic, 896 S5M8767_REG_DVSRAMP, 0x04, 0x04); 897 898 if (s5m8767->buck4_ramp) 899 regmap_update_bits(s5m8767->iodev->regmap_pmic, 900 S5M8767_REG_DVSRAMP, 0x02, 0x02); 901 902 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp 903 || s5m8767->buck4_ramp) { 904 unsigned int val; 905 switch (s5m8767->ramp_delay) { 906 case 5: 907 val = S5M8767_DVS_BUCK_RAMP_5; 908 break; 909 case 10: 910 val = S5M8767_DVS_BUCK_RAMP_10; 911 break; 912 case 25: 913 val = S5M8767_DVS_BUCK_RAMP_25; 914 break; 915 case 50: 916 val = S5M8767_DVS_BUCK_RAMP_50; 917 break; 918 case 100: 919 val = S5M8767_DVS_BUCK_RAMP_100; 920 break; 921 default: 922 val = S5M8767_DVS_BUCK_RAMP_10; 923 } 924 regmap_update_bits(s5m8767->iodev->regmap_pmic, 925 S5M8767_REG_DVSRAMP, 926 S5M8767_DVS_BUCK_RAMP_MASK, 927 val << S5M8767_DVS_BUCK_RAMP_SHIFT); 928 } 929 930 for (i = 0; i < pdata->num_regulators; i++) { 931 const struct sec_voltage_desc *desc; 932 int id = pdata->regulators[i].id; 933 int enable_reg, enable_val; 934 struct regulator_dev *rdev; 935 936 desc = reg_voltage_map[id]; 937 if (desc) { 938 regulators[id].n_voltages = 939 (desc->max - desc->min) / desc->step + 1; 940 regulators[id].min_uV = desc->min; 941 regulators[id].uV_step = desc->step; 942 regulators[id].vsel_reg = 943 s5m8767_get_vsel_reg(id, s5m8767); 944 if (id < S5M8767_BUCK1) 945 regulators[id].vsel_mask = 0x3f; 946 else 947 regulators[id].vsel_mask = 0xff; 948 949 ret = s5m8767_get_register(s5m8767, id, &enable_reg, 950 &enable_val); 951 if (ret) { 952 dev_err(s5m8767->dev, "error reading registers\n"); 953 return ret; 954 } 955 regulators[id].enable_reg = enable_reg; 956 regulators[id].enable_mask = S5M8767_ENCTRL_MASK; 957 regulators[id].enable_val = enable_val; 958 } 959 960 config.dev = s5m8767->dev; 961 config.init_data = pdata->regulators[i].initdata; 962 config.driver_data = s5m8767; 963 config.regmap = iodev->regmap_pmic; 964 config.of_node = pdata->regulators[i].reg_node; 965 config.ena_gpiod = NULL; 966 if (pdata->regulators[i].ext_control_gpiod) 967 s5m8767_regulator_config_ext_control(s5m8767, 968 &pdata->regulators[i], &config); 969 970 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], 971 &config); 972 if (IS_ERR(rdev)) { 973 ret = PTR_ERR(rdev); 974 dev_err(s5m8767->dev, "regulator init failed for %d\n", 975 id); 976 return ret; 977 } 978 979 if (pdata->regulators[i].ext_control_gpiod) { 980 ret = s5m8767_enable_ext_control(s5m8767, rdev); 981 if (ret < 0) { 982 dev_err(s5m8767->dev, 983 "failed to enable gpio control over %s: %d\n", 984 rdev->desc->name, ret); 985 return ret; 986 } 987 } 988 } 989 990 return 0; 991 } 992 993 static const struct platform_device_id s5m8767_pmic_id[] = { 994 { "s5m8767-pmic", 0}, 995 { }, 996 }; 997 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id); 998 999 static struct platform_driver s5m8767_pmic_driver = { 1000 .driver = { 1001 .name = "s5m8767-pmic", 1002 }, 1003 .probe = s5m8767_pmic_probe, 1004 .id_table = s5m8767_pmic_id, 1005 }; 1006 1007 static int __init s5m8767_pmic_init(void) 1008 { 1009 return platform_driver_register(&s5m8767_pmic_driver); 1010 } 1011 subsys_initcall(s5m8767_pmic_init); 1012 1013 static void __exit s5m8767_pmic_exit(void) 1014 { 1015 platform_driver_unregister(&s5m8767_pmic_driver); 1016 } 1017 module_exit(s5m8767_pmic_exit); 1018 1019 /* Module information */ 1020 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 1021 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver"); 1022 MODULE_LICENSE("GPL"); 1023