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 static const unsigned int max77802_buck234_ramp_table[] = { 47 12500, 48 25000, 49 50000, 50 100000, 51 }; 52 53 static const unsigned int max77802_buck16_ramp_table[] = { 54 1000, 2000, 3030, 4000, 55 5000, 5880, 7140, 8330, 56 9090, 10000, 11110, 12500, 57 16670, 25000, 50000, 100000, 58 }; 59 60 struct max77802_regulator_prv { 61 /* Array indexed by regulator id */ 62 unsigned int opmode[MAX77802_REG_MAX]; 63 }; 64 max77802_map_mode(unsigned int mode)65 static inline unsigned int max77802_map_mode(unsigned int mode) 66 { 67 return mode == MAX77802_OPMODE_NORMAL ? 68 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY; 69 } 70 max77802_get_opmode_shift(int id)71 static int max77802_get_opmode_shift(int id) 72 { 73 if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && 74 id <= MAX77802_BUCK10)) 75 return 0; 76 77 if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) 78 return MAX77802_OPMODE_BUCK234_SHIFT; 79 80 if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) 81 return MAX77802_OPMODE_SHIFT_LDO; 82 83 return -EINVAL; 84 } 85 86 /** 87 * max77802_set_suspend_disable - Disable the regulator during system suspend 88 * @rdev: regulator to mark as disabled 89 * 90 * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ. 91 * Configure the regulator so the PMIC will turn it OFF during system suspend. 92 */ max77802_set_suspend_disable(struct regulator_dev * rdev)93 static int max77802_set_suspend_disable(struct regulator_dev *rdev) 94 { 95 unsigned int val = MAX77802_OFF_PWRREQ; 96 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 97 unsigned int id = rdev_get_id(rdev); 98 int shift = max77802_get_opmode_shift(id); 99 100 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode))) 101 return -EINVAL; 102 max77802->opmode[id] = val; 103 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 104 rdev->desc->enable_mask, val << shift); 105 } 106 107 /* 108 * Some LDOs support Low Power Mode while the system is running. 109 * 110 * LDOs 1, 3, 20, 21. 111 */ max77802_set_mode(struct regulator_dev * rdev,unsigned int mode)112 static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode) 113 { 114 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 115 unsigned int id = rdev_get_id(rdev); 116 unsigned int val; 117 int shift = max77802_get_opmode_shift(id); 118 119 switch (mode) { 120 case REGULATOR_MODE_STANDBY: 121 val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */ 122 break; 123 case REGULATOR_MODE_NORMAL: 124 val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */ 125 break; 126 default: 127 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", 128 rdev->desc->name, mode); 129 return -EINVAL; 130 } 131 132 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode))) 133 return -EINVAL; 134 135 max77802->opmode[id] = val; 136 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 137 rdev->desc->enable_mask, val << shift); 138 } 139 max77802_get_mode(struct regulator_dev * rdev)140 static unsigned max77802_get_mode(struct regulator_dev *rdev) 141 { 142 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 143 unsigned int id = rdev_get_id(rdev); 144 145 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode))) 146 return -EINVAL; 147 return max77802_map_mode(max77802->opmode[id]); 148 } 149 150 /** 151 * max77802_set_suspend_mode - set regulator opmode when the system is suspended 152 * @rdev: regulator to change mode 153 * @mode: operating mode to be set 154 * 155 * Will set the operating mode for the regulators during system suspend. 156 * This function is valid for the three different enable control logics: 157 * 158 * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35) 159 * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21) 160 * Enable Control Logic3 by PWRREQ (LDO 3) 161 * 162 * If setting the regulator mode fails, the function only warns but does 163 * not return a negative error number to avoid the regulator core to stop 164 * setting the operating mode for the remaining regulators. 165 */ max77802_set_suspend_mode(struct regulator_dev * rdev,unsigned int mode)166 static int max77802_set_suspend_mode(struct regulator_dev *rdev, 167 unsigned int mode) 168 { 169 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 170 unsigned int id = rdev_get_id(rdev); 171 unsigned int val; 172 int shift = max77802_get_opmode_shift(id); 173 174 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode))) 175 return -EINVAL; 176 177 /* 178 * If the regulator has been disabled for suspend 179 * then is invalid to try setting a suspend mode. 180 */ 181 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) { 182 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n", 183 rdev->desc->name, mode); 184 return 0; 185 } 186 187 switch (mode) { 188 case REGULATOR_MODE_STANDBY: 189 /* 190 * If the regulator opmode is normal then enable 191 * ON in Low Power Mode by PWRREQ. If the mode is 192 * already Low Power then no action is required. 193 */ 194 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL) 195 val = MAX77802_LP_PWRREQ; 196 else 197 return 0; 198 break; 199 case REGULATOR_MODE_NORMAL: 200 /* 201 * If the regulator operating mode is Low Power then 202 * normal is not a valid opmode in suspend. If the 203 * mode is already normal then no action is required. 204 */ 205 if (max77802->opmode[id] == MAX77802_OPMODE_LP) 206 dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n", 207 rdev->desc->name, mode); 208 return 0; 209 default: 210 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", 211 rdev->desc->name, mode); 212 return -EINVAL; 213 } 214 215 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 216 rdev->desc->enable_mask, val << shift); 217 } 218 max77802_enable(struct regulator_dev * rdev)219 static int max77802_enable(struct regulator_dev *rdev) 220 { 221 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); 222 unsigned int id = rdev_get_id(rdev); 223 int shift = max77802_get_opmode_shift(id); 224 225 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode))) 226 return -EINVAL; 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 } 234 235 /* 236 * LDOs 2, 4-19, 22-35 237 */ 238 static const struct regulator_ops max77802_ldo_ops_logic1 = { 239 .list_voltage = regulator_list_voltage_linear, 240 .map_voltage = regulator_map_voltage_linear, 241 .is_enabled = regulator_is_enabled_regmap, 242 .enable = max77802_enable, 243 .disable = regulator_disable_regmap, 244 .get_voltage_sel = regulator_get_voltage_sel_regmap, 245 .set_voltage_sel = regulator_set_voltage_sel_regmap, 246 .set_voltage_time_sel = regulator_set_voltage_time_sel, 247 .set_suspend_disable = max77802_set_suspend_disable, 248 .set_suspend_mode = max77802_set_suspend_mode, 249 }; 250 251 /* 252 * LDOs 1, 20, 21, 3 253 */ 254 static const struct regulator_ops max77802_ldo_ops_logic2 = { 255 .list_voltage = regulator_list_voltage_linear, 256 .map_voltage = regulator_map_voltage_linear, 257 .is_enabled = regulator_is_enabled_regmap, 258 .enable = max77802_enable, 259 .disable = regulator_disable_regmap, 260 .get_voltage_sel = regulator_get_voltage_sel_regmap, 261 .set_voltage_sel = regulator_set_voltage_sel_regmap, 262 .set_voltage_time_sel = regulator_set_voltage_time_sel, 263 .set_mode = max77802_set_mode, 264 .get_mode = max77802_get_mode, 265 .set_suspend_mode = max77802_set_suspend_mode, 266 }; 267 268 /* BUCKS 1, 6 */ 269 static const struct regulator_ops max77802_buck_16_dvs_ops = { 270 .list_voltage = regulator_list_voltage_linear, 271 .map_voltage = regulator_map_voltage_linear, 272 .is_enabled = regulator_is_enabled_regmap, 273 .enable = max77802_enable, 274 .disable = regulator_disable_regmap, 275 .get_voltage_sel = regulator_get_voltage_sel_regmap, 276 .set_voltage_sel = regulator_set_voltage_sel_regmap, 277 .set_voltage_time_sel = regulator_set_voltage_time_sel, 278 .set_ramp_delay = regulator_set_ramp_delay_regmap, 279 .set_suspend_disable = max77802_set_suspend_disable, 280 }; 281 282 /* BUCKs 2-4 */ 283 static const struct regulator_ops max77802_buck_234_ops = { 284 .list_voltage = regulator_list_voltage_linear, 285 .map_voltage = regulator_map_voltage_linear, 286 .is_enabled = regulator_is_enabled_regmap, 287 .enable = max77802_enable, 288 .disable = regulator_disable_regmap, 289 .get_voltage_sel = regulator_get_voltage_sel_regmap, 290 .set_voltage_sel = regulator_set_voltage_sel_regmap, 291 .set_voltage_time_sel = regulator_set_voltage_time_sel, 292 .set_ramp_delay = regulator_set_ramp_delay_regmap, 293 .set_suspend_disable = max77802_set_suspend_disable, 294 .set_suspend_mode = max77802_set_suspend_mode, 295 }; 296 297 /* BUCKs 5, 7-10 */ 298 static const struct regulator_ops max77802_buck_dvs_ops = { 299 .list_voltage = regulator_list_voltage_linear, 300 .map_voltage = regulator_map_voltage_linear, 301 .is_enabled = regulator_is_enabled_regmap, 302 .enable = max77802_enable, 303 .disable = regulator_disable_regmap, 304 .get_voltage_sel = regulator_get_voltage_sel_regmap, 305 .set_voltage_sel = regulator_set_voltage_sel_regmap, 306 .set_voltage_time_sel = regulator_set_voltage_time_sel, 307 .set_suspend_disable = max77802_set_suspend_disable, 308 }; 309 310 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ 311 #define regulator_77802_desc_p_ldo(num, supply, log) { \ 312 .name = "LDO"#num, \ 313 .of_match = of_match_ptr("LDO"#num), \ 314 .regulators_node = of_match_ptr("regulators"), \ 315 .id = MAX77802_LDO##num, \ 316 .supply_name = "inl"#supply, \ 317 .ops = &max77802_ldo_ops_logic##log, \ 318 .type = REGULATOR_VOLTAGE, \ 319 .owner = THIS_MODULE, \ 320 .min_uV = 800000, \ 321 .uV_step = 50000, \ 322 .ramp_delay = MAX77802_RAMP_DELAY, \ 323 .n_voltages = 1 << 6, \ 324 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 325 .vsel_mask = MAX77802_VSEL_MASK, \ 326 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 327 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ 328 .of_map_mode = max77802_map_mode, \ 329 } 330 331 /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ 332 #define regulator_77802_desc_n_ldo(num, supply, log) { \ 333 .name = "LDO"#num, \ 334 .of_match = of_match_ptr("LDO"#num), \ 335 .regulators_node = of_match_ptr("regulators"), \ 336 .id = MAX77802_LDO##num, \ 337 .supply_name = "inl"#supply, \ 338 .ops = &max77802_ldo_ops_logic##log, \ 339 .type = REGULATOR_VOLTAGE, \ 340 .owner = THIS_MODULE, \ 341 .min_uV = 800000, \ 342 .uV_step = 25000, \ 343 .ramp_delay = MAX77802_RAMP_DELAY, \ 344 .n_voltages = 1 << 6, \ 345 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 346 .vsel_mask = MAX77802_VSEL_MASK, \ 347 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ 348 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ 349 .of_map_mode = max77802_map_mode, \ 350 } 351 352 /* BUCKs 1, 6 */ 353 #define regulator_77802_desc_16_buck(num) { \ 354 .name = "BUCK"#num, \ 355 .of_match = of_match_ptr("BUCK"#num), \ 356 .regulators_node = of_match_ptr("regulators"), \ 357 .id = MAX77802_BUCK##num, \ 358 .supply_name = "inb"#num, \ 359 .ops = &max77802_buck_16_dvs_ops, \ 360 .type = REGULATOR_VOLTAGE, \ 361 .owner = THIS_MODULE, \ 362 .min_uV = 612500, \ 363 .uV_step = 6250, \ 364 .ramp_delay = MAX77802_RAMP_DELAY, \ 365 .n_voltages = 1 << 8, \ 366 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ 367 .vsel_mask = MAX77802_DVS_VSEL_MASK, \ 368 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ 369 .enable_mask = MAX77802_OPMODE_MASK, \ 370 .ramp_reg = MAX77802_REG_BUCK ## num ## CTRL, \ 371 .ramp_mask = MAX77802_RAMP_RATE_MASK_4BIT, \ 372 .ramp_delay_table = max77802_buck16_ramp_table, \ 373 .n_ramp_values = ARRAY_SIZE(max77802_buck16_ramp_table), \ 374 .of_map_mode = max77802_map_mode, \ 375 } 376 377 /* BUCKS 2-4 */ 378 #define regulator_77802_desc_234_buck(num) { \ 379 .name = "BUCK"#num, \ 380 .of_match = of_match_ptr("BUCK"#num), \ 381 .regulators_node = of_match_ptr("regulators"), \ 382 .id = MAX77802_BUCK##num, \ 383 .supply_name = "inb"#num, \ 384 .ops = &max77802_buck_234_ops, \ 385 .type = REGULATOR_VOLTAGE, \ 386 .owner = THIS_MODULE, \ 387 .min_uV = 600000, \ 388 .uV_step = 6250, \ 389 .ramp_delay = MAX77802_RAMP_DELAY, \ 390 .n_voltages = 0x91, \ 391 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ 392 .vsel_mask = MAX77802_DVS_VSEL_MASK, \ 393 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ 394 .enable_mask = MAX77802_OPMODE_MASK << \ 395 MAX77802_OPMODE_BUCK234_SHIFT, \ 396 .ramp_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ 397 .ramp_mask = MAX77802_RAMP_RATE_MASK_2BIT, \ 398 .ramp_delay_table = max77802_buck234_ramp_table, \ 399 .n_ramp_values = ARRAY_SIZE(max77802_buck234_ramp_table), \ 400 .of_map_mode = max77802_map_mode, \ 401 } 402 403 /* BUCK 5 */ 404 #define regulator_77802_desc_buck5(num) { \ 405 .name = "BUCK"#num, \ 406 .of_match = of_match_ptr("BUCK"#num), \ 407 .regulators_node = of_match_ptr("regulators"), \ 408 .id = MAX77802_BUCK##num, \ 409 .supply_name = "inb"#num, \ 410 .ops = &max77802_buck_dvs_ops, \ 411 .type = REGULATOR_VOLTAGE, \ 412 .owner = THIS_MODULE, \ 413 .min_uV = 750000, \ 414 .uV_step = 50000, \ 415 .ramp_delay = MAX77802_RAMP_DELAY, \ 416 .n_voltages = 1 << 6, \ 417 .vsel_reg = MAX77802_REG_BUCK5OUT, \ 418 .vsel_mask = MAX77802_VSEL_MASK, \ 419 .enable_reg = MAX77802_REG_BUCK5CTRL, \ 420 .enable_mask = MAX77802_OPMODE_MASK, \ 421 .of_map_mode = max77802_map_mode, \ 422 } 423 424 /* BUCKs 7-10 */ 425 #define regulator_77802_desc_buck7_10(num) { \ 426 .name = "BUCK"#num, \ 427 .of_match = of_match_ptr("BUCK"#num), \ 428 .regulators_node = of_match_ptr("regulators"), \ 429 .id = MAX77802_BUCK##num, \ 430 .supply_name = "inb"#num, \ 431 .ops = &max77802_buck_dvs_ops, \ 432 .type = REGULATOR_VOLTAGE, \ 433 .owner = THIS_MODULE, \ 434 .min_uV = 750000, \ 435 .uV_step = 50000, \ 436 .ramp_delay = MAX77802_RAMP_DELAY, \ 437 .n_voltages = 1 << 6, \ 438 .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ 439 .vsel_mask = MAX77802_VSEL_MASK, \ 440 .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ 441 .enable_mask = MAX77802_OPMODE_MASK, \ 442 .of_map_mode = max77802_map_mode, \ 443 } 444 445 static const struct regulator_desc regulators[] = { 446 regulator_77802_desc_16_buck(1), 447 regulator_77802_desc_234_buck(2), 448 regulator_77802_desc_234_buck(3), 449 regulator_77802_desc_234_buck(4), 450 regulator_77802_desc_buck5(5), 451 regulator_77802_desc_16_buck(6), 452 regulator_77802_desc_buck7_10(7), 453 regulator_77802_desc_buck7_10(8), 454 regulator_77802_desc_buck7_10(9), 455 regulator_77802_desc_buck7_10(10), 456 regulator_77802_desc_n_ldo(1, 10, 2), 457 regulator_77802_desc_n_ldo(2, 10, 1), 458 regulator_77802_desc_p_ldo(3, 3, 2), 459 regulator_77802_desc_p_ldo(4, 6, 1), 460 regulator_77802_desc_p_ldo(5, 3, 1), 461 regulator_77802_desc_p_ldo(6, 3, 1), 462 regulator_77802_desc_p_ldo(7, 3, 1), 463 regulator_77802_desc_n_ldo(8, 1, 1), 464 regulator_77802_desc_p_ldo(9, 5, 1), 465 regulator_77802_desc_p_ldo(10, 4, 1), 466 regulator_77802_desc_p_ldo(11, 4, 1), 467 regulator_77802_desc_p_ldo(12, 9, 1), 468 regulator_77802_desc_p_ldo(13, 4, 1), 469 regulator_77802_desc_p_ldo(14, 4, 1), 470 regulator_77802_desc_n_ldo(15, 1, 1), 471 regulator_77802_desc_n_ldo(17, 2, 1), 472 regulator_77802_desc_p_ldo(18, 7, 1), 473 regulator_77802_desc_p_ldo(19, 5, 1), 474 regulator_77802_desc_p_ldo(20, 7, 2), 475 regulator_77802_desc_p_ldo(21, 6, 2), 476 regulator_77802_desc_p_ldo(23, 9, 1), 477 regulator_77802_desc_p_ldo(24, 6, 1), 478 regulator_77802_desc_p_ldo(25, 9, 1), 479 regulator_77802_desc_p_ldo(26, 9, 1), 480 regulator_77802_desc_n_ldo(27, 2, 1), 481 regulator_77802_desc_p_ldo(28, 7, 1), 482 regulator_77802_desc_p_ldo(29, 7, 1), 483 regulator_77802_desc_n_ldo(30, 2, 1), 484 regulator_77802_desc_p_ldo(32, 9, 1), 485 regulator_77802_desc_p_ldo(33, 6, 1), 486 regulator_77802_desc_p_ldo(34, 9, 1), 487 regulator_77802_desc_n_ldo(35, 2, 1), 488 }; 489 max77802_pmic_probe(struct platform_device * pdev)490 static int max77802_pmic_probe(struct platform_device *pdev) 491 { 492 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); 493 struct max77802_regulator_prv *max77802; 494 int i, val; 495 struct regulator_config config = { }; 496 497 max77802 = devm_kzalloc(&pdev->dev, 498 sizeof(struct max77802_regulator_prv), 499 GFP_KERNEL); 500 if (!max77802) 501 return -ENOMEM; 502 503 config.dev = iodev->dev; 504 config.regmap = iodev->regmap; 505 config.driver_data = max77802; 506 platform_set_drvdata(pdev, max77802); 507 508 for (i = 0; i < MAX77802_REG_MAX; i++) { 509 struct regulator_dev *rdev; 510 unsigned int id = regulators[i].id; 511 int shift = max77802_get_opmode_shift(id); 512 int ret; 513 514 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); 515 if (ret < 0) { 516 dev_warn(&pdev->dev, 517 "cannot read current mode for %d\n", i); 518 val = MAX77802_OPMODE_NORMAL; 519 } else { 520 val = val >> shift & MAX77802_OPMODE_MASK; 521 } 522 523 /* 524 * If the regulator is disabled and the system warm rebooted, 525 * the hardware reports OFF as the regulator operating mode. 526 * Default to operating mode NORMAL in that case. 527 */ 528 if (id < ARRAY_SIZE(max77802->opmode)) { 529 if (val == MAX77802_STATUS_OFF) 530 max77802->opmode[id] = MAX77802_OPMODE_NORMAL; 531 else 532 max77802->opmode[id] = val; 533 } 534 535 rdev = devm_regulator_register(&pdev->dev, 536 ®ulators[i], &config); 537 if (IS_ERR(rdev)) { 538 ret = PTR_ERR(rdev); 539 dev_err(&pdev->dev, 540 "regulator init failed for %d: %d\n", i, ret); 541 return ret; 542 } 543 } 544 545 return 0; 546 } 547 548 static const struct platform_device_id max77802_pmic_id[] = { 549 {"max77802-pmic", 0}, 550 { }, 551 }; 552 MODULE_DEVICE_TABLE(platform, max77802_pmic_id); 553 554 static struct platform_driver max77802_pmic_driver = { 555 .driver = { 556 .name = "max77802-pmic", 557 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 558 }, 559 .probe = max77802_pmic_probe, 560 .id_table = max77802_pmic_id, 561 }; 562 563 module_platform_driver(max77802_pmic_driver); 564 565 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); 566 MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); 567 MODULE_LICENSE("GPL"); 568