1/* 2 * Regulators driver for Dialog Semiconductor DA903x 3 * 4 * Copyright (C) 2006-2008 Marvell International Ltd. 5 * Copyright (C) 2008 Compulab Ltd. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12#include <linux/kernel.h> 13#include <linux/init.h> 14#include <linux/err.h> 15#include <linux/module.h> 16#include <linux/platform_device.h> 17#include <linux/regulator/driver.h> 18#include <linux/regulator/machine.h> 19#include <linux/mfd/da903x.h> 20 21/* DA9030 Registers */ 22#define DA9030_INVAL (-1) 23#define DA9030_LDO1011 (0x10) 24#define DA9030_LDO15 (0x11) 25#define DA9030_LDO1416 (0x12) 26#define DA9030_LDO1819 (0x13) 27#define DA9030_LDO17 (0x14) 28#define DA9030_BUCK2DVM1 (0x15) 29#define DA9030_BUCK2DVM2 (0x16) 30#define DA9030_RCTL11 (0x17) 31#define DA9030_RCTL21 (0x18) 32#define DA9030_LDO1 (0x90) 33#define DA9030_LDO23 (0x91) 34#define DA9030_LDO45 (0x92) 35#define DA9030_LDO6 (0x93) 36#define DA9030_LDO78 (0x94) 37#define DA9030_LDO912 (0x95) 38#define DA9030_BUCK (0x96) 39#define DA9030_RCTL12 (0x97) 40#define DA9030_RCTL22 (0x98) 41#define DA9030_LDO_UNLOCK (0xa0) 42#define DA9030_LDO_UNLOCK_MASK (0xe0) 43#define DA9034_OVER1 (0x10) 44 45/* DA9034 Registers */ 46#define DA9034_INVAL (-1) 47#define DA9034_OVER2 (0x11) 48#define DA9034_OVER3 (0x12) 49#define DA9034_LDO643 (0x13) 50#define DA9034_LDO987 (0x14) 51#define DA9034_LDO1110 (0x15) 52#define DA9034_LDO1312 (0x16) 53#define DA9034_LDO1514 (0x17) 54#define DA9034_VCC1 (0x20) 55#define DA9034_ADTV1 (0x23) 56#define DA9034_ADTV2 (0x24) 57#define DA9034_AVRC (0x25) 58#define DA9034_CDTV1 (0x26) 59#define DA9034_CDTV2 (0x27) 60#define DA9034_CVRC (0x28) 61#define DA9034_SDTV1 (0x29) 62#define DA9034_SDTV2 (0x2a) 63#define DA9034_SVRC (0x2b) 64#define DA9034_MDTV1 (0x32) 65#define DA9034_MDTV2 (0x33) 66#define DA9034_MVRC (0x34) 67 68/* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */ 69#define DA9035_OVER3 (0x12) 70#define DA9035_VCC2 (0x1f) 71#define DA9035_3DTV1 (0x2c) 72#define DA9035_3DTV2 (0x2d) 73#define DA9035_3VRC (0x2e) 74#define DA9035_AUTOSKIP (0x2f) 75 76struct da903x_regulator_info { 77 struct regulator_desc desc; 78 79 int max_uV; 80 int vol_reg; 81 int vol_shift; 82 int vol_nbits; 83 int update_reg; 84 int update_bit; 85 int enable_reg; 86 int enable_bit; 87}; 88 89static inline struct device *to_da903x_dev(struct regulator_dev *rdev) 90{ 91 return rdev_get_dev(rdev)->parent->parent; 92} 93 94static inline int check_range(struct da903x_regulator_info *info, 95 int min_uV, int max_uV) 96{ 97 if (min_uV < info->desc.min_uV || min_uV > info->max_uV) 98 return -EINVAL; 99 100 return 0; 101} 102 103/* DA9030/DA9034 common operations */ 104static int da903x_set_voltage_sel(struct regulator_dev *rdev, unsigned selector) 105{ 106 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 107 struct device *da9034_dev = to_da903x_dev(rdev); 108 uint8_t val, mask; 109 110 if (rdev->desc->n_voltages == 1) 111 return -EINVAL; 112 113 val = selector << info->vol_shift; 114 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; 115 116 return da903x_update(da9034_dev, info->vol_reg, val, mask); 117} 118 119static int da903x_get_voltage_sel(struct regulator_dev *rdev) 120{ 121 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 122 struct device *da9034_dev = to_da903x_dev(rdev); 123 uint8_t val, mask; 124 int ret; 125 126 if (rdev->desc->n_voltages == 1) 127 return 0; 128 129 ret = da903x_read(da9034_dev, info->vol_reg, &val); 130 if (ret) 131 return ret; 132 133 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; 134 val = (val & mask) >> info->vol_shift; 135 136 return val; 137} 138 139static int da903x_enable(struct regulator_dev *rdev) 140{ 141 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 142 struct device *da9034_dev = to_da903x_dev(rdev); 143 144 return da903x_set_bits(da9034_dev, info->enable_reg, 145 1 << info->enable_bit); 146} 147 148static int da903x_disable(struct regulator_dev *rdev) 149{ 150 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 151 struct device *da9034_dev = to_da903x_dev(rdev); 152 153 return da903x_clr_bits(da9034_dev, info->enable_reg, 154 1 << info->enable_bit); 155} 156 157static int da903x_is_enabled(struct regulator_dev *rdev) 158{ 159 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 160 struct device *da9034_dev = to_da903x_dev(rdev); 161 uint8_t reg_val; 162 int ret; 163 164 ret = da903x_read(da9034_dev, info->enable_reg, ®_val); 165 if (ret) 166 return ret; 167 168 return !!(reg_val & (1 << info->enable_bit)); 169} 170 171/* DA9030 specific operations */ 172static int da9030_set_ldo1_15_voltage_sel(struct regulator_dev *rdev, 173 unsigned selector) 174{ 175 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 176 struct device *da903x_dev = to_da903x_dev(rdev); 177 uint8_t val, mask; 178 int ret; 179 180 val = selector << info->vol_shift; 181 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; 182 val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */ 183 mask |= DA9030_LDO_UNLOCK_MASK; 184 185 /* write twice */ 186 ret = da903x_update(da903x_dev, info->vol_reg, val, mask); 187 if (ret) 188 return ret; 189 190 return da903x_update(da903x_dev, info->vol_reg, val, mask); 191} 192 193static int da9030_map_ldo14_voltage(struct regulator_dev *rdev, 194 int min_uV, int max_uV) 195{ 196 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 197 int thresh, sel; 198 199 if (check_range(info, min_uV, max_uV)) { 200 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV); 201 return -EINVAL; 202 } 203 204 thresh = (info->max_uV + info->desc.min_uV) / 2; 205 if (min_uV < thresh) { 206 sel = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step); 207 sel |= 0x4; 208 } else { 209 sel = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step); 210 } 211 212 return sel; 213} 214 215static int da9030_list_ldo14_voltage(struct regulator_dev *rdev, 216 unsigned selector) 217{ 218 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 219 int volt; 220 221 if (selector & 0x4) 222 volt = rdev->desc->min_uV + 223 rdev->desc->uV_step * (3 - (selector & ~0x4)); 224 else 225 volt = (info->max_uV + rdev->desc->min_uV) / 2 + 226 rdev->desc->uV_step * (selector & ~0x4); 227 228 if (volt > info->max_uV) 229 return -EINVAL; 230 231 return volt; 232} 233 234/* DA9034 specific operations */ 235static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev, 236 unsigned selector) 237{ 238 struct da903x_regulator_info *info = rdev_get_drvdata(rdev); 239 struct device *da9034_dev = to_da903x_dev(rdev); 240 uint8_t val, mask; 241 int ret; 242 243 val = selector << info->vol_shift; 244 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; 245 246 ret = da903x_update(da9034_dev, info->vol_reg, val, mask); 247 if (ret) 248 return ret; 249 250 ret = da903x_set_bits(da9034_dev, info->update_reg, 251 1 << info->update_bit); 252 return ret; 253} 254 255static const struct regulator_linear_range da9034_ldo12_ranges[] = { 256 REGULATOR_LINEAR_RANGE(1700000, 0, 7, 50000), 257 REGULATOR_LINEAR_RANGE(2700000, 8, 15, 50000), 258}; 259 260static struct regulator_ops da903x_regulator_ldo_ops = { 261 .set_voltage_sel = da903x_set_voltage_sel, 262 .get_voltage_sel = da903x_get_voltage_sel, 263 .list_voltage = regulator_list_voltage_linear, 264 .map_voltage = regulator_map_voltage_linear, 265 .enable = da903x_enable, 266 .disable = da903x_disable, 267 .is_enabled = da903x_is_enabled, 268}; 269 270/* NOTE: this is dedicated for the insane DA9030 LDO14 */ 271static struct regulator_ops da9030_regulator_ldo14_ops = { 272 .set_voltage_sel = da903x_set_voltage_sel, 273 .get_voltage_sel = da903x_get_voltage_sel, 274 .list_voltage = da9030_list_ldo14_voltage, 275 .map_voltage = da9030_map_ldo14_voltage, 276 .enable = da903x_enable, 277 .disable = da903x_disable, 278 .is_enabled = da903x_is_enabled, 279}; 280 281/* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */ 282static struct regulator_ops da9030_regulator_ldo1_15_ops = { 283 .set_voltage_sel = da9030_set_ldo1_15_voltage_sel, 284 .get_voltage_sel = da903x_get_voltage_sel, 285 .list_voltage = regulator_list_voltage_linear, 286 .map_voltage = regulator_map_voltage_linear, 287 .enable = da903x_enable, 288 .disable = da903x_disable, 289 .is_enabled = da903x_is_enabled, 290}; 291 292static struct regulator_ops da9034_regulator_dvc_ops = { 293 .set_voltage_sel = da9034_set_dvc_voltage_sel, 294 .get_voltage_sel = da903x_get_voltage_sel, 295 .list_voltage = regulator_list_voltage_linear, 296 .map_voltage = regulator_map_voltage_linear, 297 .enable = da903x_enable, 298 .disable = da903x_disable, 299 .is_enabled = da903x_is_enabled, 300}; 301 302/* NOTE: this is dedicated for the insane LDO12 */ 303static struct regulator_ops da9034_regulator_ldo12_ops = { 304 .set_voltage_sel = da903x_set_voltage_sel, 305 .get_voltage_sel = da903x_get_voltage_sel, 306 .list_voltage = regulator_list_voltage_linear_range, 307 .map_voltage = regulator_map_voltage_linear_range, 308 .enable = da903x_enable, 309 .disable = da903x_disable, 310 .is_enabled = da903x_is_enabled, 311}; 312 313#define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \ 314{ \ 315 .desc = { \ 316 .name = "LDO" #_id, \ 317 .ops = &da903x_regulator_ldo_ops, \ 318 .type = REGULATOR_VOLTAGE, \ 319 .id = _pmic##_ID_LDO##_id, \ 320 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \ 321 .owner = THIS_MODULE, \ 322 .min_uV = (min) * 1000, \ 323 .uV_step = (step) * 1000, \ 324 }, \ 325 .max_uV = (max) * 1000, \ 326 .vol_reg = _pmic##_##vreg, \ 327 .vol_shift = (shift), \ 328 .vol_nbits = (nbits), \ 329 .enable_reg = _pmic##_##ereg, \ 330 .enable_bit = (ebit), \ 331} 332 333#define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \ 334{ \ 335 .desc = { \ 336 .name = #_id, \ 337 .ops = &da9034_regulator_dvc_ops, \ 338 .type = REGULATOR_VOLTAGE, \ 339 .id = _pmic##_ID_##_id, \ 340 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \ 341 .owner = THIS_MODULE, \ 342 .min_uV = (min) * 1000, \ 343 .uV_step = (step) * 1000, \ 344 }, \ 345 .max_uV = (max) * 1000, \ 346 .vol_reg = _pmic##_##vreg, \ 347 .vol_shift = (0), \ 348 .vol_nbits = (nbits), \ 349 .update_reg = _pmic##_##ureg, \ 350 .update_bit = (ubit), \ 351 .enable_reg = _pmic##_##ereg, \ 352 .enable_bit = (ebit), \ 353} 354 355#define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \ 356 DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit) 357 358#define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \ 359 DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit) 360 361#define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \ 362 DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \ 363 ereg, ebit) 364 365#define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \ 366 DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \ 367 ereg, ebit) 368 369#define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \ 370 DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \ 371 ereg, ebit) 372 373static struct da903x_regulator_info da903x_regulator_info[] = { 374 /* DA9030 */ 375 DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0), 376 377 DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1), 378 DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2), 379 DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3), 380 DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4), 381 DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5), 382 DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6), 383 DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7), 384 DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0), 385 DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1), 386 DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2), 387 DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3), 388 DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4), 389 DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4), 390 DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5), 391 DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6), 392 DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7), 393 DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2), 394 DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1), 395 DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */ 396 397 /* DA9034 */ 398 DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0), 399 DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1), 400 DA9034_DVC(LDO2, 725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2), 401 DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4), 402 403 DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5), 404 DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6), 405 DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0), 406 DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1), 407 DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2), 408 DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3), 409 DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4), 410 DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5), 411 DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6), 412 DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7), 413 DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0), 414 DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1), 415 DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */ 416 417 /* DA9035 */ 418 DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3), 419}; 420 421static inline struct da903x_regulator_info *find_regulator_info(int id) 422{ 423 struct da903x_regulator_info *ri; 424 int i; 425 426 for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) { 427 ri = &da903x_regulator_info[i]; 428 if (ri->desc.id == id) 429 return ri; 430 } 431 return NULL; 432} 433 434static int da903x_regulator_probe(struct platform_device *pdev) 435{ 436 struct da903x_regulator_info *ri = NULL; 437 struct regulator_dev *rdev; 438 struct regulator_config config = { }; 439 440 ri = find_regulator_info(pdev->id); 441 if (ri == NULL) { 442 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 443 return -EINVAL; 444 } 445 446 /* Workaround for the weird LDO12 voltage setting */ 447 if (ri->desc.id == DA9034_ID_LDO12) { 448 ri->desc.ops = &da9034_regulator_ldo12_ops; 449 ri->desc.n_voltages = 16; 450 ri->desc.linear_ranges = da9034_ldo12_ranges; 451 ri->desc.n_linear_ranges = ARRAY_SIZE(da9034_ldo12_ranges); 452 } 453 454 if (ri->desc.id == DA9030_ID_LDO14) 455 ri->desc.ops = &da9030_regulator_ldo14_ops; 456 457 if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15) 458 ri->desc.ops = &da9030_regulator_ldo1_15_ops; 459 460 config.dev = &pdev->dev; 461 config.init_data = dev_get_platdata(&pdev->dev); 462 config.driver_data = ri; 463 464 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config); 465 if (IS_ERR(rdev)) { 466 dev_err(&pdev->dev, "failed to register regulator %s\n", 467 ri->desc.name); 468 return PTR_ERR(rdev); 469 } 470 471 platform_set_drvdata(pdev, rdev); 472 return 0; 473} 474 475static struct platform_driver da903x_regulator_driver = { 476 .driver = { 477 .name = "da903x-regulator", 478 .owner = THIS_MODULE, 479 }, 480 .probe = da903x_regulator_probe, 481}; 482 483static int __init da903x_regulator_init(void) 484{ 485 return platform_driver_register(&da903x_regulator_driver); 486} 487subsys_initcall(da903x_regulator_init); 488 489static void __exit da903x_regulator_exit(void) 490{ 491 platform_driver_unregister(&da903x_regulator_driver); 492} 493module_exit(da903x_regulator_exit); 494 495MODULE_LICENSE("GPL"); 496MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>" 497 "Mike Rapoport <mike@compulab.co.il>"); 498MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC"); 499MODULE_ALIAS("platform:da903x-regulator"); 500