1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // max77802.c - Regulator driver for the Maxim 77802 4 // 5 // Copyright (C) 2013-2014 Google, Inc 6 // Simon Glass <sjg@chromium.org> 7 // 8 // Copyright (C) 2012 Samsung Electronics 9 // Chiwoong Byun <woong.byun@samsung.com> 10 // Jonghwa Lee <jonghwa3.lee@samsung.com> 11 // 12 // This driver is based on max8997.c 13 14 #include <linux/kernel.h> 15 #include <linux/bug.h> 16 #include <linux/err.h> 17 #include <linux/slab.h> 18 #include <linux/module.h> 19 #include <linux/platform_device.h> 20 #include <linux/regulator/driver.h> 21 #include <linux/regulator/machine.h> 22 #include <linux/regulator/of_regulator.h> 23 #include <linux/mfd/max77686.h> 24 #include <linux/mfd/max77686-private.h> 25 #include <dt-bindings/regulator/maxim,max77802.h> 26 27 /* Default ramp delay in case it is not manually set */ 28 #define MAX77802_RAMP_DELAY 100000 /* uV/us */ 29 30 #define MAX77802_OPMODE_SHIFT_LDO 6 31 #define MAX77802_OPMODE_BUCK234_SHIFT 4 32 #define MAX77802_OPMODE_MASK 0x3 33 34 #define MAX77802_VSEL_MASK 0x3F 35 #define MAX77802_DVS_VSEL_MASK 0xFF 36 37 #define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 38 #define MAX77802_RAMP_RATE_SHIFT_2BIT 6 39 #define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 40 #define MAX77802_RAMP_RATE_SHIFT_4BIT 4 41 42 #define MAX77802_STATUS_OFF 0x0 43 #define MAX77802_OFF_PWRREQ 0x1 44 #define MAX77802_LP_PWRREQ 0x2 45 46 /* MAX77802 has two register formats: 2-bit and 4-bit */ 47 static const unsigned int ramp_table_77802_2bit[] = { 48 12500, 49 25000, 50 50000, 51 100000, 52 }; 53 54 static unsigned int ramp_table_77802_4bit[] = { 55 1000, 2000, 3030, 4000, 56 5000, 5880, 7140, 8330, 57 9090, 10000, 11110, 12500, 58 16670, 25000, 50000, 100000, 59 }; 60 61 struct max77802_regulator_prv { 62 /* Array indexed by regulator id */ 63 unsigned int opmode[MAX77802_REG_MAX]; 64 }; 65 66 static inline unsigned int max77802_map_mode(unsigned int mode) 67 { 68 return mode == MAX77802_OPMODE_NORMAL ? 69 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY; 70 } 71 72 static int max77802_get_opmode_shift(int id) 73 { 74 if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && 75 id <= MAX77802_BUCK10)) 76 return 0; 77 78 if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) 79 return MAX77802_OPMODE_BUCK234_SHIFT; 80 81 if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) 82 return MAX77802_OPMODE_SHIFT_LDO; 83 84 return -EINVAL; 85 } 86 87 /** 88 * max77802_set_suspend_disable - Disable the regulator during system suspend 89 * @rdev: regulator to mark as disabled 90 * 91 * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ. 92 * Configure the regulator so the PMIC will turn it OFF during system suspend. 93 */ 94 static int max77802_set_suspend_disable(struct regulator_dev *rdev) 95 { 96 unsigned int val = MAX77802_OFF_PWRREQ; 97 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 98 int id = rdev_get_id(rdev); 99 int shift = max77802_get_opmode_shift(id); 100 101 max77802->opmode[id] = val; 102 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 103 rdev->desc->enable_mask, val << shift); 104 } 105 106 /* 107 * Some LDOs support Low Power Mode while the system is running. 108 * 109 * LDOs 1, 3, 20, 21. 110 */ 111 static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode) 112 { 113 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 114 int id = rdev_get_id(rdev); 115 unsigned int val; 116 int shift = max77802_get_opmode_shift(id); 117 118 switch (mode) { 119 case REGULATOR_MODE_STANDBY: 120 val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */ 121 break; 122 case REGULATOR_MODE_NORMAL: 123 val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */ 124 break; 125 default: 126 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", 127 rdev->desc->name, mode); 128 return -EINVAL; 129 } 130 131 max77802->opmode[id] = val; 132 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 133 rdev->desc->enable_mask, val << shift); 134 } 135 136 static unsigned max77802_get_mode(struct regulator_dev *rdev) 137 { 138 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 139 int id = rdev_get_id(rdev); 140 141 return max77802_map_mode(max77802->opmode[id]); 142 } 143 144 /** 145 * max77802_set_suspend_mode - set regulator opmode when the system is suspended 146 * @rdev: regulator to change mode 147 * @mode: operating mode to be set 148 * 149 * Will set the operating mode for the regulators during system suspend. 150 * This function is valid for the three different enable control logics: 151 * 152 * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35) 153 * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21) 154 * Enable Control Logic3 by PWRREQ (LDO 3) 155 * 156 * If setting the regulator mode fails, the function only warns but does 157 * not return an error code to avoid the regulator core to stop setting 158 * the operating mode for the remaining regulators. 159 */ 160 static int max77802_set_suspend_mode(struct regulator_dev *rdev, 161 unsigned int mode) 162 { 163 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 164 int id = rdev_get_id(rdev); 165 unsigned int val; 166 int shift = max77802_get_opmode_shift(id); 167 168 /* 169 * If the regulator has been disabled for suspend 170 * then is invalid to try setting a suspend mode. 171 */ 172 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) { 173 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n", 174 rdev->desc->name, mode); 175 return 0; 176 } 177 178 switch (mode) { 179 case REGULATOR_MODE_STANDBY: 180 /* 181 * If the regulator opmode is normal then enable 182 * ON in Low Power Mode by PWRREQ. If the mode is 183 * already Low Power then no action is required. 184 */ 185 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL) 186 val = MAX77802_LP_PWRREQ; 187 else 188 return 0; 189 break; 190 case REGULATOR_MODE_NORMAL: 191 /* 192 * If the regulator operating mode is Low Power then 193 * normal is not a valid opmode in suspend. If the 194 * mode is already normal then no action is required. 195 */ 196 if (max77802->opmode[id] == MAX77802_OPMODE_LP) 197 dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n", 198 rdev->desc->name, mode); 199 return 0; 200 default: 201 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", 202 rdev->desc->name, mode); 203 return -EINVAL; 204 } 205 206 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 207 rdev->desc->enable_mask, val << shift); 208 } 209 210 static int max77802_enable(struct regulator_dev *rdev) 211 { 212 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 213 int id = rdev_get_id(rdev); 214 int shift = max77802_get_opmode_shift(id); 215 216 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) 217 max77802->opmode[id] = MAX77802_OPMODE_NORMAL; 218 219 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 220 rdev->desc->enable_mask, 221 max77802->opmode[id] << shift); 222 } 223 224 static int max77802_find_ramp_value(struct regulator_dev *rdev, 225 const unsigned int limits[], int size, 226 unsigned int ramp_delay) 227 { 228 int i; 229 230 for (i = 0; i < size; i++) { 231 if (ramp_delay <= limits[i]) 232 return i; 233 } 234 235 /* Use maximum value for no ramp control */ 236 dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", 237 rdev->desc->name, ramp_delay); 238 return size - 1; 239 } 240 241 /* Used for BUCKs 2-4 */ 242 static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, 243 int ramp_delay) 244 { 245 int id = rdev_get_id(rdev); 246 unsigned int ramp_value; 247 248 if (id > MAX77802_BUCK4) { 249 dev_warn(&rdev->dev, 250 "%s: regulator: ramp delay not supported\n", 251 rdev->desc->name); 252 return -EINVAL; 253 } 254 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, 255 ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); 256 257 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 258 MAX77802_RAMP_RATE_MASK_2BIT, 259 ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); 260 } 261 262 /* For BUCK1, 6 */ 263 static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, 264 int ramp_delay) 265 { 266 unsigned int ramp_value; 267 268 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, 269 ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); 270 271 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 272 MAX77802_RAMP_RATE_MASK_4BIT, 273 ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); 274 } 275 276 /* 277 * LDOs 2, 4-19, 22-35 278 */ 279 static const struct regulator_ops max77802_ldo_ops_logic1 = { 280 .list_voltage = regulator_list_voltage_linear, 281 .map_voltage = regulator_map_voltage_linear, 282 .is_enabled = regulator_is_enabled_regmap, 283 .enable = max77802_enable, 284 .disable = regulator_disable_regmap, 285 .get_voltage_sel = regulator_get_voltage_sel_regmap, 286 .set_voltage_sel = regulator_set_voltage_sel_regmap, 287 .set_voltage_time_sel = regulator_set_voltage_time_sel, 288 .set_suspend_disable = max77802_set_suspend_disable, 289 .set_suspend_mode = max77802_set_suspend_mode, 290 }; 291 292 /* 293 * LDOs 1, 20, 21, 3 294 */ 295 static const struct regulator_ops max77802_ldo_ops_logic2 = { 296 .list_voltage = regulator_list_voltage_linear, 297 .map_voltage = regulator_map_voltage_linear, 298 .is_enabled = regulator_is_enabled_regmap, 299 .enable = max77802_enable, 300 .disable = regulator_disable_regmap, 301 .get_voltage_sel = regulator_get_voltage_sel_regmap, 302 .set_voltage_sel = regulator_set_voltage_sel_regmap, 303 .set_voltage_time_sel = regulator_set_voltage_time_sel, 304 .set_mode = max77802_set_mode, 305 .get_mode = max77802_get_mode, 306 .set_suspend_mode = max77802_set_suspend_mode, 307 }; 308 309 /* BUCKS 1, 6 */ 310 static const struct regulator_ops max77802_buck_16_dvs_ops = { 311 .list_voltage = regulator_list_voltage_linear, 312 .map_voltage = regulator_map_voltage_linear, 313 .is_enabled = regulator_is_enabled_regmap, 314 .enable = max77802_enable, 315 .disable = regulator_disable_regmap, 316 .get_voltage_sel = regulator_get_voltage_sel_regmap, 317 .set_voltage_sel = regulator_set_voltage_sel_regmap, 318 .set_voltage_time_sel = regulator_set_voltage_time_sel, 319 .set_ramp_delay = max77802_set_ramp_delay_4bit, 320 .set_suspend_disable = max77802_set_suspend_disable, 321 }; 322 323 /* BUCKs 2-4 */ 324 static const struct regulator_ops max77802_buck_234_ops = { 325 .list_voltage = regulator_list_voltage_linear, 326 .map_voltage = regulator_map_voltage_linear, 327 .is_enabled = regulator_is_enabled_regmap, 328 .enable = max77802_enable, 329 .disable = regulator_disable_regmap, 330 .get_voltage_sel = regulator_get_voltage_sel_regmap, 331 .set_voltage_sel = regulator_set_voltage_sel_regmap, 332 .set_voltage_time_sel = regulator_set_voltage_time_sel, 333 .set_ramp_delay = max77802_set_ramp_delay_2bit, 334 .set_suspend_disable = max77802_set_suspend_disable, 335 .set_suspend_mode = max77802_set_suspend_mode, 336 }; 337 338 /* BUCKs 5, 7-10 */ 339 static const struct regulator_ops max77802_buck_dvs_ops = { 340 .list_voltage = regulator_list_voltage_linear, 341 .map_voltage = regulator_map_voltage_linear, 342 .is_enabled = regulator_is_enabled_regmap, 343 .enable = max77802_enable, 344 .disable = regulator_disable_regmap, 345 .get_voltage_sel = regulator_get_voltage_sel_regmap, 346 .set_voltage_sel = regulator_set_voltage_sel_regmap, 347 .set_voltage_time_sel = regulator_set_voltage_time_sel, 348 .set_ramp_delay = max77802_set_ramp_delay_2bit, 349 .set_suspend_disable = max77802_set_suspend_disable, 350 }; 351 352 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ 353 #define regulator_77802_desc_p_ldo(num, supply, log) { \ 354 .name = "LDO"#num, \ 355 .of_match = of_match_ptr("LDO"#num), \ 356 .regulators_node = of_match_ptr("regulators"), \ 357 .id = MAX77802_LDO##num, \ 358 .supply_name = "inl"#supply, \ 359 .ops = &max77802_ldo_ops_logic##log, \ 360 .type = REGULATOR_VOLTAGE, \ 361 .owner = THIS_MODULE, \ 362 .min_uV = 800000, \ 363 .uV_step = 50000, \ 364 .ramp_delay = MAX77802_RAMP_DELAY, \ 365 .n_voltages = 1 << 6, \ 366 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 367 .vsel_mask = MAX77802_VSEL_MASK, \ 368 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 369 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ 370 .of_map_mode = max77802_map_mode, \ 371 } 372 373 /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ 374 #define regulator_77802_desc_n_ldo(num, supply, log) { \ 375 .name = "LDO"#num, \ 376 .of_match = of_match_ptr("LDO"#num), \ 377 .regulators_node = of_match_ptr("regulators"), \ 378 .id = MAX77802_LDO##num, \ 379 .supply_name = "inl"#supply, \ 380 .ops = &max77802_ldo_ops_logic##log, \ 381 .type = REGULATOR_VOLTAGE, \ 382 .owner = THIS_MODULE, \ 383 .min_uV = 800000, \ 384 .uV_step = 25000, \ 385 .ramp_delay = MAX77802_RAMP_DELAY, \ 386 .n_voltages = 1 << 6, \ 387 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 388 .vsel_mask = MAX77802_VSEL_MASK, \ 389 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 390 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ 391 .of_map_mode = max77802_map_mode, \ 392 } 393 394 /* BUCKs 1, 6 */ 395 #define regulator_77802_desc_16_buck(num) { \ 396 .name = "BUCK"#num, \ 397 .of_match = of_match_ptr("BUCK"#num), \ 398 .regulators_node = of_match_ptr("regulators"), \ 399 .id = MAX77802_BUCK##num, \ 400 .supply_name = "inb"#num, \ 401 .ops = &max77802_buck_16_dvs_ops, \ 402 .type = REGULATOR_VOLTAGE, \ 403 .owner = THIS_MODULE, \ 404 .min_uV = 612500, \ 405 .uV_step = 6250, \ 406 .ramp_delay = MAX77802_RAMP_DELAY, \ 407 .n_voltages = 1 << 8, \ 408 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ 409 .vsel_mask = MAX77802_DVS_VSEL_MASK, \ 410 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ 411 .enable_mask = MAX77802_OPMODE_MASK, \ 412 .of_map_mode = max77802_map_mode, \ 413 } 414 415 /* BUCKS 2-4 */ 416 #define regulator_77802_desc_234_buck(num) { \ 417 .name = "BUCK"#num, \ 418 .of_match = of_match_ptr("BUCK"#num), \ 419 .regulators_node = of_match_ptr("regulators"), \ 420 .id = MAX77802_BUCK##num, \ 421 .supply_name = "inb"#num, \ 422 .ops = &max77802_buck_234_ops, \ 423 .type = REGULATOR_VOLTAGE, \ 424 .owner = THIS_MODULE, \ 425 .min_uV = 600000, \ 426 .uV_step = 6250, \ 427 .ramp_delay = MAX77802_RAMP_DELAY, \ 428 .n_voltages = 0x91, \ 429 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ 430 .vsel_mask = MAX77802_DVS_VSEL_MASK, \ 431 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ 432 .enable_mask = MAX77802_OPMODE_MASK << \ 433 MAX77802_OPMODE_BUCK234_SHIFT, \ 434 .of_map_mode = max77802_map_mode, \ 435 } 436 437 /* BUCK 5 */ 438 #define regulator_77802_desc_buck5(num) { \ 439 .name = "BUCK"#num, \ 440 .of_match = of_match_ptr("BUCK"#num), \ 441 .regulators_node = of_match_ptr("regulators"), \ 442 .id = MAX77802_BUCK##num, \ 443 .supply_name = "inb"#num, \ 444 .ops = &max77802_buck_dvs_ops, \ 445 .type = REGULATOR_VOLTAGE, \ 446 .owner = THIS_MODULE, \ 447 .min_uV = 750000, \ 448 .uV_step = 50000, \ 449 .ramp_delay = MAX77802_RAMP_DELAY, \ 450 .n_voltages = 1 << 6, \ 451 .vsel_reg = MAX77802_REG_BUCK5OUT, \ 452 .vsel_mask = MAX77802_VSEL_MASK, \ 453 .enable_reg = MAX77802_REG_BUCK5CTRL, \ 454 .enable_mask = MAX77802_OPMODE_MASK, \ 455 .of_map_mode = max77802_map_mode, \ 456 } 457 458 /* BUCKs 7-10 */ 459 #define regulator_77802_desc_buck7_10(num) { \ 460 .name = "BUCK"#num, \ 461 .of_match = of_match_ptr("BUCK"#num), \ 462 .regulators_node = of_match_ptr("regulators"), \ 463 .id = MAX77802_BUCK##num, \ 464 .supply_name = "inb"#num, \ 465 .ops = &max77802_buck_dvs_ops, \ 466 .type = REGULATOR_VOLTAGE, \ 467 .owner = THIS_MODULE, \ 468 .min_uV = 750000, \ 469 .uV_step = 50000, \ 470 .ramp_delay = MAX77802_RAMP_DELAY, \ 471 .n_voltages = 1 << 6, \ 472 .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ 473 .vsel_mask = MAX77802_VSEL_MASK, \ 474 .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ 475 .enable_mask = MAX77802_OPMODE_MASK, \ 476 .of_map_mode = max77802_map_mode, \ 477 } 478 479 static const struct regulator_desc regulators[] = { 480 regulator_77802_desc_16_buck(1), 481 regulator_77802_desc_234_buck(2), 482 regulator_77802_desc_234_buck(3), 483 regulator_77802_desc_234_buck(4), 484 regulator_77802_desc_buck5(5), 485 regulator_77802_desc_16_buck(6), 486 regulator_77802_desc_buck7_10(7), 487 regulator_77802_desc_buck7_10(8), 488 regulator_77802_desc_buck7_10(9), 489 regulator_77802_desc_buck7_10(10), 490 regulator_77802_desc_n_ldo(1, 10, 2), 491 regulator_77802_desc_n_ldo(2, 10, 1), 492 regulator_77802_desc_p_ldo(3, 3, 2), 493 regulator_77802_desc_p_ldo(4, 6, 1), 494 regulator_77802_desc_p_ldo(5, 3, 1), 495 regulator_77802_desc_p_ldo(6, 3, 1), 496 regulator_77802_desc_p_ldo(7, 3, 1), 497 regulator_77802_desc_n_ldo(8, 1, 1), 498 regulator_77802_desc_p_ldo(9, 5, 1), 499 regulator_77802_desc_p_ldo(10, 4, 1), 500 regulator_77802_desc_p_ldo(11, 4, 1), 501 regulator_77802_desc_p_ldo(12, 9, 1), 502 regulator_77802_desc_p_ldo(13, 4, 1), 503 regulator_77802_desc_p_ldo(14, 4, 1), 504 regulator_77802_desc_n_ldo(15, 1, 1), 505 regulator_77802_desc_n_ldo(17, 2, 1), 506 regulator_77802_desc_p_ldo(18, 7, 1), 507 regulator_77802_desc_p_ldo(19, 5, 1), 508 regulator_77802_desc_p_ldo(20, 7, 2), 509 regulator_77802_desc_p_ldo(21, 6, 2), 510 regulator_77802_desc_p_ldo(23, 9, 1), 511 regulator_77802_desc_p_ldo(24, 6, 1), 512 regulator_77802_desc_p_ldo(25, 9, 1), 513 regulator_77802_desc_p_ldo(26, 9, 1), 514 regulator_77802_desc_n_ldo(27, 2, 1), 515 regulator_77802_desc_p_ldo(28, 7, 1), 516 regulator_77802_desc_p_ldo(29, 7, 1), 517 regulator_77802_desc_n_ldo(30, 2, 1), 518 regulator_77802_desc_p_ldo(32, 9, 1), 519 regulator_77802_desc_p_ldo(33, 6, 1), 520 regulator_77802_desc_p_ldo(34, 9, 1), 521 regulator_77802_desc_n_ldo(35, 2, 1), 522 }; 523 524 static int max77802_pmic_probe(struct platform_device *pdev) 525 { 526 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); 527 struct max77802_regulator_prv *max77802; 528 int i, val; 529 struct regulator_config config = { }; 530 531 max77802 = devm_kzalloc(&pdev->dev, 532 sizeof(struct max77802_regulator_prv), 533 GFP_KERNEL); 534 if (!max77802) 535 return -ENOMEM; 536 537 config.dev = iodev->dev; 538 config.regmap = iodev->regmap; 539 config.driver_data = max77802; 540 platform_set_drvdata(pdev, max77802); 541 542 for (i = 0; i < MAX77802_REG_MAX; i++) { 543 struct regulator_dev *rdev; 544 int id = regulators[i].id; 545 int shift = max77802_get_opmode_shift(id); 546 int ret; 547 548 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); 549 if (ret < 0) { 550 dev_warn(&pdev->dev, 551 "cannot read current mode for %d\n", i); 552 val = MAX77802_OPMODE_NORMAL; 553 } else { 554 val = val >> shift & MAX77802_OPMODE_MASK; 555 } 556 557 /* 558 * If the regulator is disabled and the system warm rebooted, 559 * the hardware reports OFF as the regulator operating mode. 560 * Default to operating mode NORMAL in that case. 561 */ 562 if (val == MAX77802_STATUS_OFF) 563 max77802->opmode[id] = MAX77802_OPMODE_NORMAL; 564 else 565 max77802->opmode[id] = val; 566 567 rdev = devm_regulator_register(&pdev->dev, 568 ®ulators[i], &config); 569 if (IS_ERR(rdev)) { 570 ret = PTR_ERR(rdev); 571 dev_err(&pdev->dev, 572 "regulator init failed for %d: %d\n", i, ret); 573 return ret; 574 } 575 } 576 577 return 0; 578 } 579 580 static const struct platform_device_id max77802_pmic_id[] = { 581 {"max77802-pmic", 0}, 582 { }, 583 }; 584 MODULE_DEVICE_TABLE(platform, max77802_pmic_id); 585 586 static struct platform_driver max77802_pmic_driver = { 587 .driver = { 588 .name = "max77802-pmic", 589 }, 590 .probe = max77802_pmic_probe, 591 .id_table = max77802_pmic_id, 592 }; 593 594 module_platform_driver(max77802_pmic_driver); 595 596 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); 597 MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); 598 MODULE_LICENSE("GPL"); 599