1/* 2 * max77802.c - Regulator driver for the Maxim 77802 3 * 4 * Copyright (C) 2013-2014 Google, Inc 5 * Simon Glass <sjg@chromium.org> 6 * 7 * Copyright (C) 2012 Samsung Electronics 8 * Chiwoong Byun <woong.byun@smasung.com> 9 * Jonghwa Lee <jonghwa3.lee@samsung.com> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * This driver is based on max8997.c 22 */ 23 24#include <linux/kernel.h> 25#include <linux/bug.h> 26#include <linux/err.h> 27#include <linux/gpio.h> 28#include <linux/slab.h> 29#include <linux/gpio/consumer.h> 30#include <linux/platform_device.h> 31#include <linux/regulator/driver.h> 32#include <linux/regulator/machine.h> 33#include <linux/regulator/of_regulator.h> 34#include <linux/mfd/max77686.h> 35#include <linux/mfd/max77686-private.h> 36#include <dt-bindings/regulator/maxim,max77802.h> 37 38/* Default ramp delay in case it is not manually set */ 39#define MAX77802_RAMP_DELAY 100000 /* uV/us */ 40 41#define MAX77802_OPMODE_SHIFT_LDO 6 42#define MAX77802_OPMODE_BUCK234_SHIFT 4 43#define MAX77802_OPMODE_MASK 0x3 44 45#define MAX77802_VSEL_MASK 0x3F 46#define MAX77802_DVS_VSEL_MASK 0xFF 47 48#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 49#define MAX77802_RAMP_RATE_SHIFT_2BIT 6 50#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 51#define MAX77802_RAMP_RATE_SHIFT_4BIT 4 52 53#define MAX77802_STATUS_OFF 0x0 54#define MAX77802_OFF_PWRREQ 0x1 55#define MAX77802_LP_PWRREQ 0x2 56 57/* MAX77802 has two register formats: 2-bit and 4-bit */ 58static const unsigned int ramp_table_77802_2bit[] = { 59 12500, 60 25000, 61 50000, 62 100000, 63}; 64 65static unsigned int ramp_table_77802_4bit[] = { 66 1000, 2000, 3030, 4000, 67 5000, 5880, 7140, 8330, 68 9090, 10000, 11110, 12500, 69 16670, 25000, 50000, 100000, 70}; 71 72struct max77802_regulator_prv { 73 /* Array indexed by regulator id */ 74 unsigned int opmode[MAX77802_REG_MAX]; 75}; 76 77static inline unsigned int max77802_map_mode(unsigned int mode) 78{ 79 return mode == MAX77802_OPMODE_NORMAL ? 80 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY; 81} 82 83static int max77802_get_opmode_shift(int id) 84{ 85 if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && 86 id <= MAX77802_BUCK10)) 87 return 0; 88 89 if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) 90 return MAX77802_OPMODE_BUCK234_SHIFT; 91 92 if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) 93 return MAX77802_OPMODE_SHIFT_LDO; 94 95 return -EINVAL; 96} 97 98/** 99 * max77802_set_suspend_disable - Disable the regulator during system suspend 100 * @rdev: regulator to mark as disabled 101 * 102 * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ. 103 * Configure the regulator so the PMIC will turn it OFF during system suspend. 104 */ 105static int max77802_set_suspend_disable(struct regulator_dev *rdev) 106{ 107 unsigned int val = MAX77802_OFF_PWRREQ; 108 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 109 int id = rdev_get_id(rdev); 110 int shift = max77802_get_opmode_shift(id); 111 112 max77802->opmode[id] = val; 113 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 114 rdev->desc->enable_mask, val << shift); 115} 116 117/* 118 * Some LDOs support Low Power Mode while the system is running. 119 * 120 * LDOs 1, 3, 20, 21. 121 */ 122static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode) 123{ 124 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 125 int id = rdev_get_id(rdev); 126 unsigned int val; 127 int shift = max77802_get_opmode_shift(id); 128 129 switch (mode) { 130 case REGULATOR_MODE_STANDBY: 131 val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */ 132 break; 133 case REGULATOR_MODE_NORMAL: 134 val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */ 135 break; 136 default: 137 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", 138 rdev->desc->name, mode); 139 return -EINVAL; 140 } 141 142 max77802->opmode[id] = val; 143 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 144 rdev->desc->enable_mask, val << shift); 145} 146 147static unsigned max77802_get_mode(struct regulator_dev *rdev) 148{ 149 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 150 int id = rdev_get_id(rdev); 151 152 return max77802_map_mode(max77802->opmode[id]); 153} 154 155/** 156 * max77802_set_suspend_mode - set regulator opmode when the system is suspended 157 * @rdev: regulator to change mode 158 * @mode: operating mode to be set 159 * 160 * Will set the operating mode for the regulators during system suspend. 161 * This function is valid for the three different enable control logics: 162 * 163 * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35) 164 * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21) 165 * Enable Control Logic3 by PWRREQ (LDO 3) 166 * 167 * If setting the regulator mode fails, the function only warns but does 168 * not return an error code to avoid the regulator core to stop setting 169 * the operating mode for the remaining regulators. 170 */ 171static int max77802_set_suspend_mode(struct regulator_dev *rdev, 172 unsigned int mode) 173{ 174 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 175 int id = rdev_get_id(rdev); 176 unsigned int val; 177 int shift = max77802_get_opmode_shift(id); 178 179 /* 180 * If the regulator has been disabled for suspend 181 * then is invalid to try setting a suspend mode. 182 */ 183 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) { 184 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n", 185 rdev->desc->name, mode); 186 return 0; 187 } 188 189 switch (mode) { 190 case REGULATOR_MODE_STANDBY: 191 /* 192 * If the regulator opmode is normal then enable 193 * ON in Low Power Mode by PWRREQ. If the mode is 194 * already Low Power then no action is required. 195 */ 196 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL) 197 val = MAX77802_LP_PWRREQ; 198 else 199 return 0; 200 break; 201 case REGULATOR_MODE_NORMAL: 202 /* 203 * If the regulator operating mode is Low Power then 204 * normal is not a valid opmode in suspend. If the 205 * mode is already normal then no action is required. 206 */ 207 if (max77802->opmode[id] == MAX77802_OPMODE_LP) 208 dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n", 209 rdev->desc->name, mode); 210 return 0; 211 default: 212 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", 213 rdev->desc->name, mode); 214 return -EINVAL; 215 } 216 217 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 218 rdev->desc->enable_mask, val << shift); 219} 220 221static int max77802_enable(struct regulator_dev *rdev) 222{ 223 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 224 int id = rdev_get_id(rdev); 225 int shift = max77802_get_opmode_shift(id); 226 227 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) 228 max77802->opmode[id] = MAX77802_OPMODE_NORMAL; 229 230 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 231 rdev->desc->enable_mask, 232 max77802->opmode[id] << shift); 233} 234 235static int max77802_find_ramp_value(struct regulator_dev *rdev, 236 const unsigned int limits[], int size, 237 unsigned int ramp_delay) 238{ 239 int i; 240 241 for (i = 0; i < size; i++) { 242 if (ramp_delay <= limits[i]) 243 return i; 244 } 245 246 /* Use maximum value for no ramp control */ 247 dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", 248 rdev->desc->name, ramp_delay); 249 return size - 1; 250} 251 252/* Used for BUCKs 2-4 */ 253static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, 254 int ramp_delay) 255{ 256 int id = rdev_get_id(rdev); 257 unsigned int ramp_value; 258 259 if (id > MAX77802_BUCK4) { 260 dev_warn(&rdev->dev, 261 "%s: regulator: ramp delay not supported\n", 262 rdev->desc->name); 263 return -EINVAL; 264 } 265 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, 266 ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); 267 268 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 269 MAX77802_RAMP_RATE_MASK_2BIT, 270 ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); 271} 272 273/* For BUCK1, 6 */ 274static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, 275 int ramp_delay) 276{ 277 unsigned int ramp_value; 278 279 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, 280 ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); 281 282 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 283 MAX77802_RAMP_RATE_MASK_4BIT, 284 ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); 285} 286 287/* 288 * LDOs 2, 4-19, 22-35 289 */ 290static struct regulator_ops max77802_ldo_ops_logic1 = { 291 .list_voltage = regulator_list_voltage_linear, 292 .map_voltage = regulator_map_voltage_linear, 293 .is_enabled = regulator_is_enabled_regmap, 294 .enable = max77802_enable, 295 .disable = regulator_disable_regmap, 296 .get_voltage_sel = regulator_get_voltage_sel_regmap, 297 .set_voltage_sel = regulator_set_voltage_sel_regmap, 298 .set_voltage_time_sel = regulator_set_voltage_time_sel, 299 .set_suspend_disable = max77802_set_suspend_disable, 300 .set_suspend_mode = max77802_set_suspend_mode, 301}; 302 303/* 304 * LDOs 1, 20, 21, 3 305 */ 306static struct regulator_ops max77802_ldo_ops_logic2 = { 307 .list_voltage = regulator_list_voltage_linear, 308 .map_voltage = regulator_map_voltage_linear, 309 .is_enabled = regulator_is_enabled_regmap, 310 .enable = max77802_enable, 311 .disable = regulator_disable_regmap, 312 .get_voltage_sel = regulator_get_voltage_sel_regmap, 313 .set_voltage_sel = regulator_set_voltage_sel_regmap, 314 .set_voltage_time_sel = regulator_set_voltage_time_sel, 315 .set_mode = max77802_set_mode, 316 .get_mode = max77802_get_mode, 317 .set_suspend_mode = max77802_set_suspend_mode, 318}; 319 320/* BUCKS 1, 6 */ 321static struct regulator_ops max77802_buck_16_dvs_ops = { 322 .list_voltage = regulator_list_voltage_linear, 323 .map_voltage = regulator_map_voltage_linear, 324 .is_enabled = regulator_is_enabled_regmap, 325 .enable = max77802_enable, 326 .disable = regulator_disable_regmap, 327 .get_voltage_sel = regulator_get_voltage_sel_regmap, 328 .set_voltage_sel = regulator_set_voltage_sel_regmap, 329 .set_voltage_time_sel = regulator_set_voltage_time_sel, 330 .set_ramp_delay = max77802_set_ramp_delay_4bit, 331 .set_suspend_disable = max77802_set_suspend_disable, 332}; 333 334/* BUCKs 2-4 */ 335static struct regulator_ops max77802_buck_234_ops = { 336 .list_voltage = regulator_list_voltage_linear, 337 .map_voltage = regulator_map_voltage_linear, 338 .is_enabled = regulator_is_enabled_regmap, 339 .enable = max77802_enable, 340 .disable = regulator_disable_regmap, 341 .get_voltage_sel = regulator_get_voltage_sel_regmap, 342 .set_voltage_sel = regulator_set_voltage_sel_regmap, 343 .set_voltage_time_sel = regulator_set_voltage_time_sel, 344 .set_ramp_delay = max77802_set_ramp_delay_2bit, 345 .set_suspend_disable = max77802_set_suspend_disable, 346 .set_suspend_mode = max77802_set_suspend_mode, 347}; 348 349/* BUCKs 5, 7-10 */ 350static struct regulator_ops max77802_buck_dvs_ops = { 351 .list_voltage = regulator_list_voltage_linear, 352 .map_voltage = regulator_map_voltage_linear, 353 .is_enabled = regulator_is_enabled_regmap, 354 .enable = max77802_enable, 355 .disable = regulator_disable_regmap, 356 .get_voltage_sel = regulator_get_voltage_sel_regmap, 357 .set_voltage_sel = regulator_set_voltage_sel_regmap, 358 .set_voltage_time_sel = regulator_set_voltage_time_sel, 359 .set_ramp_delay = max77802_set_ramp_delay_2bit, 360 .set_suspend_disable = max77802_set_suspend_disable, 361}; 362 363/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ 364#define regulator_77802_desc_p_ldo(num, supply, log) { \ 365 .name = "LDO"#num, \ 366 .of_match = of_match_ptr("LDO"#num), \ 367 .regulators_node = of_match_ptr("regulators"), \ 368 .id = MAX77802_LDO##num, \ 369 .supply_name = "inl"#supply, \ 370 .ops = &max77802_ldo_ops_logic##log, \ 371 .type = REGULATOR_VOLTAGE, \ 372 .owner = THIS_MODULE, \ 373 .min_uV = 800000, \ 374 .uV_step = 50000, \ 375 .ramp_delay = MAX77802_RAMP_DELAY, \ 376 .n_voltages = 1 << 6, \ 377 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 378 .vsel_mask = MAX77802_VSEL_MASK, \ 379 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 380 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ 381 .of_map_mode = max77802_map_mode, \ 382} 383 384/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ 385#define regulator_77802_desc_n_ldo(num, supply, log) { \ 386 .name = "LDO"#num, \ 387 .of_match = of_match_ptr("LDO"#num), \ 388 .regulators_node = of_match_ptr("regulators"), \ 389 .id = MAX77802_LDO##num, \ 390 .supply_name = "inl"#supply, \ 391 .ops = &max77802_ldo_ops_logic##log, \ 392 .type = REGULATOR_VOLTAGE, \ 393 .owner = THIS_MODULE, \ 394 .min_uV = 800000, \ 395 .uV_step = 25000, \ 396 .ramp_delay = MAX77802_RAMP_DELAY, \ 397 .n_voltages = 1 << 6, \ 398 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 399 .vsel_mask = MAX77802_VSEL_MASK, \ 400 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 401 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ 402 .of_map_mode = max77802_map_mode, \ 403} 404 405/* BUCKs 1, 6 */ 406#define regulator_77802_desc_16_buck(num) { \ 407 .name = "BUCK"#num, \ 408 .of_match = of_match_ptr("BUCK"#num), \ 409 .regulators_node = of_match_ptr("regulators"), \ 410 .id = MAX77802_BUCK##num, \ 411 .supply_name = "inb"#num, \ 412 .ops = &max77802_buck_16_dvs_ops, \ 413 .type = REGULATOR_VOLTAGE, \ 414 .owner = THIS_MODULE, \ 415 .min_uV = 612500, \ 416 .uV_step = 6250, \ 417 .ramp_delay = MAX77802_RAMP_DELAY, \ 418 .n_voltages = 1 << 8, \ 419 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ 420 .vsel_mask = MAX77802_DVS_VSEL_MASK, \ 421 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ 422 .enable_mask = MAX77802_OPMODE_MASK, \ 423 .of_map_mode = max77802_map_mode, \ 424} 425 426/* BUCKS 2-4 */ 427#define regulator_77802_desc_234_buck(num) { \ 428 .name = "BUCK"#num, \ 429 .of_match = of_match_ptr("BUCK"#num), \ 430 .regulators_node = of_match_ptr("regulators"), \ 431 .id = MAX77802_BUCK##num, \ 432 .supply_name = "inb"#num, \ 433 .ops = &max77802_buck_234_ops, \ 434 .type = REGULATOR_VOLTAGE, \ 435 .owner = THIS_MODULE, \ 436 .min_uV = 600000, \ 437 .uV_step = 6250, \ 438 .ramp_delay = MAX77802_RAMP_DELAY, \ 439 .n_voltages = 0x91, \ 440 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ 441 .vsel_mask = MAX77802_DVS_VSEL_MASK, \ 442 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ 443 .enable_mask = MAX77802_OPMODE_MASK << \ 444 MAX77802_OPMODE_BUCK234_SHIFT, \ 445 .of_map_mode = max77802_map_mode, \ 446} 447 448/* BUCK 5 */ 449#define regulator_77802_desc_buck5(num) { \ 450 .name = "BUCK"#num, \ 451 .of_match = of_match_ptr("BUCK"#num), \ 452 .regulators_node = of_match_ptr("regulators"), \ 453 .id = MAX77802_BUCK##num, \ 454 .supply_name = "inb"#num, \ 455 .ops = &max77802_buck_dvs_ops, \ 456 .type = REGULATOR_VOLTAGE, \ 457 .owner = THIS_MODULE, \ 458 .min_uV = 750000, \ 459 .uV_step = 50000, \ 460 .ramp_delay = MAX77802_RAMP_DELAY, \ 461 .n_voltages = 1 << 6, \ 462 .vsel_reg = MAX77802_REG_BUCK5OUT, \ 463 .vsel_mask = MAX77802_VSEL_MASK, \ 464 .enable_reg = MAX77802_REG_BUCK5CTRL, \ 465 .enable_mask = MAX77802_OPMODE_MASK, \ 466 .of_map_mode = max77802_map_mode, \ 467} 468 469/* BUCKs 7-10 */ 470#define regulator_77802_desc_buck7_10(num) { \ 471 .name = "BUCK"#num, \ 472 .of_match = of_match_ptr("BUCK"#num), \ 473 .regulators_node = of_match_ptr("regulators"), \ 474 .id = MAX77802_BUCK##num, \ 475 .supply_name = "inb"#num, \ 476 .ops = &max77802_buck_dvs_ops, \ 477 .type = REGULATOR_VOLTAGE, \ 478 .owner = THIS_MODULE, \ 479 .min_uV = 750000, \ 480 .uV_step = 50000, \ 481 .ramp_delay = MAX77802_RAMP_DELAY, \ 482 .n_voltages = 1 << 6, \ 483 .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ 484 .vsel_mask = MAX77802_VSEL_MASK, \ 485 .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ 486 .enable_mask = MAX77802_OPMODE_MASK, \ 487 .of_map_mode = max77802_map_mode, \ 488} 489 490static const struct regulator_desc regulators[] = { 491 regulator_77802_desc_16_buck(1), 492 regulator_77802_desc_234_buck(2), 493 regulator_77802_desc_234_buck(3), 494 regulator_77802_desc_234_buck(4), 495 regulator_77802_desc_buck5(5), 496 regulator_77802_desc_16_buck(6), 497 regulator_77802_desc_buck7_10(7), 498 regulator_77802_desc_buck7_10(8), 499 regulator_77802_desc_buck7_10(9), 500 regulator_77802_desc_buck7_10(10), 501 regulator_77802_desc_n_ldo(1, 10, 2), 502 regulator_77802_desc_n_ldo(2, 10, 1), 503 regulator_77802_desc_p_ldo(3, 3, 2), 504 regulator_77802_desc_p_ldo(4, 6, 1), 505 regulator_77802_desc_p_ldo(5, 3, 1), 506 regulator_77802_desc_p_ldo(6, 3, 1), 507 regulator_77802_desc_p_ldo(7, 3, 1), 508 regulator_77802_desc_n_ldo(8, 1, 1), 509 regulator_77802_desc_p_ldo(9, 5, 1), 510 regulator_77802_desc_p_ldo(10, 4, 1), 511 regulator_77802_desc_p_ldo(11, 4, 1), 512 regulator_77802_desc_p_ldo(12, 9, 1), 513 regulator_77802_desc_p_ldo(13, 4, 1), 514 regulator_77802_desc_p_ldo(14, 4, 1), 515 regulator_77802_desc_n_ldo(15, 1, 1), 516 regulator_77802_desc_n_ldo(17, 2, 1), 517 regulator_77802_desc_p_ldo(18, 7, 1), 518 regulator_77802_desc_p_ldo(19, 5, 1), 519 regulator_77802_desc_p_ldo(20, 7, 2), 520 regulator_77802_desc_p_ldo(21, 6, 2), 521 regulator_77802_desc_p_ldo(23, 9, 1), 522 regulator_77802_desc_p_ldo(24, 6, 1), 523 regulator_77802_desc_p_ldo(25, 9, 1), 524 regulator_77802_desc_p_ldo(26, 9, 1), 525 regulator_77802_desc_n_ldo(27, 2, 1), 526 regulator_77802_desc_p_ldo(28, 7, 1), 527 regulator_77802_desc_p_ldo(29, 7, 1), 528 regulator_77802_desc_n_ldo(30, 2, 1), 529 regulator_77802_desc_p_ldo(32, 9, 1), 530 regulator_77802_desc_p_ldo(33, 6, 1), 531 regulator_77802_desc_p_ldo(34, 9, 1), 532 regulator_77802_desc_n_ldo(35, 2, 1), 533}; 534 535static int max77802_pmic_probe(struct platform_device *pdev) 536{ 537 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); 538 struct max77802_regulator_prv *max77802; 539 int i, val; 540 struct regulator_config config = { }; 541 542 max77802 = devm_kzalloc(&pdev->dev, 543 sizeof(struct max77802_regulator_prv), 544 GFP_KERNEL); 545 if (!max77802) 546 return -ENOMEM; 547 548 config.dev = iodev->dev; 549 config.regmap = iodev->regmap; 550 config.driver_data = max77802; 551 platform_set_drvdata(pdev, max77802); 552 553 for (i = 0; i < MAX77802_REG_MAX; i++) { 554 struct regulator_dev *rdev; 555 int id = regulators[i].id; 556 int shift = max77802_get_opmode_shift(id); 557 int ret; 558 559 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); 560 if (ret < 0) { 561 dev_warn(&pdev->dev, 562 "cannot read current mode for %d\n", i); 563 val = MAX77802_OPMODE_NORMAL; 564 } else { 565 val = val >> shift & MAX77802_OPMODE_MASK; 566 } 567 568 /* 569 * If the regulator is disabled and the system warm rebooted, 570 * the hardware reports OFF as the regulator operating mode. 571 * Default to operating mode NORMAL in that case. 572 */ 573 if (val == MAX77802_STATUS_OFF) 574 max77802->opmode[id] = MAX77802_OPMODE_NORMAL; 575 else 576 max77802->opmode[id] = val; 577 578 rdev = devm_regulator_register(&pdev->dev, 579 ®ulators[i], &config); 580 if (IS_ERR(rdev)) { 581 ret = PTR_ERR(rdev); 582 dev_err(&pdev->dev, 583 "regulator init failed for %d: %d\n", i, ret); 584 return ret; 585 } 586 } 587 588 return 0; 589} 590 591static const struct platform_device_id max77802_pmic_id[] = { 592 {"max77802-pmic", 0}, 593 { }, 594}; 595MODULE_DEVICE_TABLE(platform, max77802_pmic_id); 596 597static struct platform_driver max77802_pmic_driver = { 598 .driver = { 599 .name = "max77802-pmic", 600 }, 601 .probe = max77802_pmic_probe, 602 .id_table = max77802_pmic_id, 603}; 604 605module_platform_driver(max77802_pmic_driver); 606 607MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); 608MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); 609MODULE_LICENSE("GPL"); 610