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 return -ENOMEM; 549 550 rmode = devm_kcalloc(&pdev->dev, 551 pdata->num_regulators, sizeof(*rmode), 552 GFP_KERNEL); 553 if (!rmode) 554 return -ENOMEM; 555 556 pdata->regulators = rdata; 557 pdata->opmode = rmode; 558 for_each_child_of_node(regulators_np, reg_np) { 559 for (i = 0; i < ARRAY_SIZE(regulators); i++) 560 if (of_node_name_eq(reg_np, regulators[i].name)) 561 break; 562 563 if (i == ARRAY_SIZE(regulators)) { 564 dev_warn(iodev->dev, 565 "don't know how to configure regulator %pOFn\n", 566 reg_np); 567 continue; 568 } 569 570 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node( 571 &pdev->dev, 572 reg_np, 573 "s5m8767,pmic-ext-control-gpios", 574 0, 575 GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE, 576 "s5m8767"); 577 if (IS_ERR(rdata->ext_control_gpiod)) 578 return PTR_ERR(rdata->ext_control_gpiod); 579 580 rdata->id = i; 581 rdata->initdata = of_get_regulator_init_data( 582 &pdev->dev, reg_np, 583 ®ulators[i]); 584 rdata->reg_node = reg_np; 585 rdata++; 586 rmode->id = i; 587 if (of_property_read_u32(reg_np, "op_mode", 588 &rmode->mode)) { 589 dev_warn(iodev->dev, 590 "no op_mode property property at %pOF\n", 591 reg_np); 592 593 rmode->mode = S5M8767_OPMODE_NORMAL_MODE; 594 } 595 rmode++; 596 } 597 598 of_node_put(regulators_np); 599 600 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) { 601 pdata->buck2_gpiodvs = true; 602 603 if (of_property_read_u32_array(pmic_np, 604 "s5m8767,pmic-buck2-dvs-voltage", 605 pdata->buck2_voltage, dvs_voltage_nr)) { 606 dev_err(iodev->dev, "buck2 voltages not specified\n"); 607 return -EINVAL; 608 } 609 } 610 611 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) { 612 pdata->buck3_gpiodvs = true; 613 614 if (of_property_read_u32_array(pmic_np, 615 "s5m8767,pmic-buck3-dvs-voltage", 616 pdata->buck3_voltage, dvs_voltage_nr)) { 617 dev_err(iodev->dev, "buck3 voltages not specified\n"); 618 return -EINVAL; 619 } 620 } 621 622 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) { 623 pdata->buck4_gpiodvs = true; 624 625 if (of_property_read_u32_array(pmic_np, 626 "s5m8767,pmic-buck4-dvs-voltage", 627 pdata->buck4_voltage, dvs_voltage_nr)) { 628 dev_err(iodev->dev, "buck4 voltages not specified\n"); 629 return -EINVAL; 630 } 631 } 632 633 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 634 pdata->buck4_gpiodvs) { 635 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); 636 if (ret) 637 return -EINVAL; 638 639 if (of_property_read_u32(pmic_np, 640 "s5m8767,pmic-buck-default-dvs-idx", 641 &pdata->buck_default_idx)) { 642 pdata->buck_default_idx = 0; 643 } else { 644 if (pdata->buck_default_idx >= 8) { 645 pdata->buck_default_idx = 0; 646 dev_info(iodev->dev, 647 "invalid value for default dvs index, use 0\n"); 648 } 649 } 650 } 651 652 ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np); 653 if (ret) 654 return -EINVAL; 655 656 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL)) 657 pdata->buck2_ramp_enable = true; 658 659 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL)) 660 pdata->buck3_ramp_enable = true; 661 662 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL)) 663 pdata->buck4_ramp_enable = true; 664 665 if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable 666 || pdata->buck4_ramp_enable) { 667 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay", 668 &pdata->buck_ramp_delay)) 669 pdata->buck_ramp_delay = 0; 670 } 671 672 return 0; 673 } 674 #else 675 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, 676 struct sec_platform_data *pdata) 677 { 678 return 0; 679 } 680 #endif /* CONFIG_OF */ 681 682 static int s5m8767_pmic_probe(struct platform_device *pdev) 683 { 684 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); 685 struct sec_platform_data *pdata = iodev->pdata; 686 struct regulator_config config = { }; 687 struct s5m8767_info *s5m8767; 688 int i, ret, buck_init; 689 690 if (!pdata) { 691 dev_err(pdev->dev.parent, "Platform data not supplied\n"); 692 return -ENODEV; 693 } 694 695 if (iodev->dev->of_node) { 696 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata); 697 if (ret) 698 return ret; 699 } 700 701 if (pdata->buck2_gpiodvs) { 702 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) { 703 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 704 return -EINVAL; 705 } 706 } 707 708 if (pdata->buck3_gpiodvs) { 709 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) { 710 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 711 return -EINVAL; 712 } 713 } 714 715 if (pdata->buck4_gpiodvs) { 716 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) { 717 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n"); 718 return -EINVAL; 719 } 720 } 721 722 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info), 723 GFP_KERNEL); 724 if (!s5m8767) 725 return -ENOMEM; 726 727 s5m8767->dev = &pdev->dev; 728 s5m8767->iodev = iodev; 729 s5m8767->num_regulators = pdata->num_regulators; 730 platform_set_drvdata(pdev, s5m8767); 731 732 s5m8767->buck_gpioindex = pdata->buck_default_idx; 733 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs; 734 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs; 735 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs; 736 s5m8767->buck_gpios[0] = pdata->buck_gpios[0]; 737 s5m8767->buck_gpios[1] = pdata->buck_gpios[1]; 738 s5m8767->buck_gpios[2] = pdata->buck_gpios[2]; 739 s5m8767->buck_ds[0] = pdata->buck_ds[0]; 740 s5m8767->buck_ds[1] = pdata->buck_ds[1]; 741 s5m8767->buck_ds[2] = pdata->buck_ds[2]; 742 743 s5m8767->ramp_delay = pdata->buck_ramp_delay; 744 s5m8767->buck2_ramp = pdata->buck2_ramp_enable; 745 s5m8767->buck3_ramp = pdata->buck3_ramp_enable; 746 s5m8767->buck4_ramp = pdata->buck4_ramp_enable; 747 s5m8767->opmode = pdata->opmode; 748 749 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 750 pdata->buck2_init); 751 752 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2, 753 buck_init); 754 755 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 756 pdata->buck3_init); 757 758 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2, 759 buck_init); 760 761 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2, 762 pdata->buck4_init); 763 764 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2, 765 buck_init); 766 767 for (i = 0; i < 8; i++) { 768 if (s5m8767->buck2_gpiodvs) { 769 s5m8767->buck2_vol[i] = 770 s5m8767_convert_voltage_to_sel( 771 &buck_voltage_val2, 772 pdata->buck2_voltage[i]); 773 } 774 775 if (s5m8767->buck3_gpiodvs) { 776 s5m8767->buck3_vol[i] = 777 s5m8767_convert_voltage_to_sel( 778 &buck_voltage_val2, 779 pdata->buck3_voltage[i]); 780 } 781 782 if (s5m8767->buck4_gpiodvs) { 783 s5m8767->buck4_vol[i] = 784 s5m8767_convert_voltage_to_sel( 785 &buck_voltage_val2, 786 pdata->buck4_voltage[i]); 787 } 788 } 789 790 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 791 pdata->buck4_gpiodvs) { 792 793 if (!gpio_is_valid(pdata->buck_gpios[0]) || 794 !gpio_is_valid(pdata->buck_gpios[1]) || 795 !gpio_is_valid(pdata->buck_gpios[2])) { 796 dev_err(&pdev->dev, "GPIO NOT VALID\n"); 797 return -EINVAL; 798 } 799 800 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0], 801 "S5M8767 SET1"); 802 if (ret) 803 return ret; 804 805 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1], 806 "S5M8767 SET2"); 807 if (ret) 808 return ret; 809 810 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2], 811 "S5M8767 SET3"); 812 if (ret) 813 return ret; 814 815 /* SET1 GPIO */ 816 gpio_direction_output(pdata->buck_gpios[0], 817 (s5m8767->buck_gpioindex >> 2) & 0x1); 818 /* SET2 GPIO */ 819 gpio_direction_output(pdata->buck_gpios[1], 820 (s5m8767->buck_gpioindex >> 1) & 0x1); 821 /* SET3 GPIO */ 822 gpio_direction_output(pdata->buck_gpios[2], 823 (s5m8767->buck_gpioindex >> 0) & 0x1); 824 } 825 826 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2"); 827 if (ret) 828 return ret; 829 830 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3"); 831 if (ret) 832 return ret; 833 834 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4"); 835 if (ret) 836 return ret; 837 838 /* DS2 GPIO */ 839 gpio_direction_output(pdata->buck_ds[0], 0x0); 840 /* DS3 GPIO */ 841 gpio_direction_output(pdata->buck_ds[1], 0x0); 842 /* DS4 GPIO */ 843 gpio_direction_output(pdata->buck_ds[2], 0x0); 844 845 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs || 846 pdata->buck4_gpiodvs) { 847 regmap_update_bits(s5m8767->iodev->regmap_pmic, 848 S5M8767_REG_BUCK2CTRL, 1 << 1, 849 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1)); 850 regmap_update_bits(s5m8767->iodev->regmap_pmic, 851 S5M8767_REG_BUCK3CTRL, 1 << 1, 852 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1)); 853 regmap_update_bits(s5m8767->iodev->regmap_pmic, 854 S5M8767_REG_BUCK4CTRL, 1 << 1, 855 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1)); 856 } 857 858 /* Initialize GPIO DVS registers */ 859 for (i = 0; i < 8; i++) { 860 if (s5m8767->buck2_gpiodvs) { 861 regmap_write(s5m8767->iodev->regmap_pmic, 862 S5M8767_REG_BUCK2DVS1 + i, 863 s5m8767->buck2_vol[i]); 864 } 865 866 if (s5m8767->buck3_gpiodvs) { 867 regmap_write(s5m8767->iodev->regmap_pmic, 868 S5M8767_REG_BUCK3DVS1 + i, 869 s5m8767->buck3_vol[i]); 870 } 871 872 if (s5m8767->buck4_gpiodvs) { 873 regmap_write(s5m8767->iodev->regmap_pmic, 874 S5M8767_REG_BUCK4DVS1 + i, 875 s5m8767->buck4_vol[i]); 876 } 877 } 878 879 if (s5m8767->buck2_ramp) 880 regmap_update_bits(s5m8767->iodev->regmap_pmic, 881 S5M8767_REG_DVSRAMP, 0x08, 0x08); 882 883 if (s5m8767->buck3_ramp) 884 regmap_update_bits(s5m8767->iodev->regmap_pmic, 885 S5M8767_REG_DVSRAMP, 0x04, 0x04); 886 887 if (s5m8767->buck4_ramp) 888 regmap_update_bits(s5m8767->iodev->regmap_pmic, 889 S5M8767_REG_DVSRAMP, 0x02, 0x02); 890 891 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp 892 || s5m8767->buck4_ramp) { 893 unsigned int val; 894 switch (s5m8767->ramp_delay) { 895 case 5: 896 val = S5M8767_DVS_BUCK_RAMP_5; 897 break; 898 case 10: 899 val = S5M8767_DVS_BUCK_RAMP_10; 900 break; 901 case 25: 902 val = S5M8767_DVS_BUCK_RAMP_25; 903 break; 904 case 50: 905 val = S5M8767_DVS_BUCK_RAMP_50; 906 break; 907 case 100: 908 val = S5M8767_DVS_BUCK_RAMP_100; 909 break; 910 default: 911 val = S5M8767_DVS_BUCK_RAMP_10; 912 } 913 regmap_update_bits(s5m8767->iodev->regmap_pmic, 914 S5M8767_REG_DVSRAMP, 915 S5M8767_DVS_BUCK_RAMP_MASK, 916 val << S5M8767_DVS_BUCK_RAMP_SHIFT); 917 } 918 919 for (i = 0; i < pdata->num_regulators; i++) { 920 const struct sec_voltage_desc *desc; 921 int id = pdata->regulators[i].id; 922 int enable_reg, enable_val; 923 struct regulator_dev *rdev; 924 925 desc = reg_voltage_map[id]; 926 if (desc) { 927 regulators[id].n_voltages = 928 (desc->max - desc->min) / desc->step + 1; 929 regulators[id].min_uV = desc->min; 930 regulators[id].uV_step = desc->step; 931 regulators[id].vsel_reg = 932 s5m8767_get_vsel_reg(id, s5m8767); 933 if (id < S5M8767_BUCK1) 934 regulators[id].vsel_mask = 0x3f; 935 else 936 regulators[id].vsel_mask = 0xff; 937 938 ret = s5m8767_get_register(s5m8767, id, &enable_reg, 939 &enable_val); 940 if (ret) { 941 dev_err(s5m8767->dev, "error reading registers\n"); 942 return ret; 943 } 944 regulators[id].enable_reg = enable_reg; 945 regulators[id].enable_mask = S5M8767_ENCTRL_MASK; 946 regulators[id].enable_val = enable_val; 947 } 948 949 config.dev = s5m8767->dev; 950 config.init_data = pdata->regulators[i].initdata; 951 config.driver_data = s5m8767; 952 config.regmap = iodev->regmap_pmic; 953 config.of_node = pdata->regulators[i].reg_node; 954 config.ena_gpiod = NULL; 955 if (pdata->regulators[i].ext_control_gpiod) { 956 /* Assigns config.ena_gpiod */ 957 s5m8767_regulator_config_ext_control(s5m8767, 958 &pdata->regulators[i], &config); 959 960 /* 961 * Hand the GPIO descriptor management over to the 962 * regulator core, remove it from devres management. 963 */ 964 devm_gpiod_unhinge(s5m8767->dev, config.ena_gpiod); 965 } 966 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], 967 &config); 968 if (IS_ERR(rdev)) { 969 ret = PTR_ERR(rdev); 970 dev_err(s5m8767->dev, "regulator init failed for %d\n", 971 id); 972 return ret; 973 } 974 975 if (pdata->regulators[i].ext_control_gpiod) { 976 ret = s5m8767_enable_ext_control(s5m8767, rdev); 977 if (ret < 0) { 978 dev_err(s5m8767->dev, 979 "failed to enable gpio control over %s: %d\n", 980 rdev->desc->name, ret); 981 return ret; 982 } 983 } 984 } 985 986 return 0; 987 } 988 989 static const struct platform_device_id s5m8767_pmic_id[] = { 990 { "s5m8767-pmic", 0}, 991 { }, 992 }; 993 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id); 994 995 static struct platform_driver s5m8767_pmic_driver = { 996 .driver = { 997 .name = "s5m8767-pmic", 998 }, 999 .probe = s5m8767_pmic_probe, 1000 .id_table = s5m8767_pmic_id, 1001 }; 1002 1003 static int __init s5m8767_pmic_init(void) 1004 { 1005 return platform_driver_register(&s5m8767_pmic_driver); 1006 } 1007 subsys_initcall(s5m8767_pmic_init); 1008 1009 static void __exit s5m8767_pmic_exit(void) 1010 { 1011 platform_driver_unregister(&s5m8767_pmic_driver); 1012 } 1013 module_exit(s5m8767_pmic_exit); 1014 1015 /* Module information */ 1016 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 1017 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver"); 1018 MODULE_LICENSE("GPL"); 1019