1// SPDX-License-Identifier: GPL-2.0+ 2// 3// da9052-regulator.c: Regulator driver for DA9052 4// 5// Copyright(c) 2011 Dialog Semiconductor Ltd. 6// 7// Author: David Dajun Chen <dchen@diasemi.com> 8 9#include <linux/module.h> 10#include <linux/moduleparam.h> 11#include <linux/init.h> 12#include <linux/err.h> 13#include <linux/platform_device.h> 14#include <linux/regulator/driver.h> 15#include <linux/regulator/machine.h> 16#include <linux/of.h> 17#include <linux/regulator/of_regulator.h> 18 19#include <linux/mfd/da9052/da9052.h> 20#include <linux/mfd/da9052/reg.h> 21#include <linux/mfd/da9052/pdata.h> 22 23/* Buck step size */ 24#define DA9052_BUCK_PERI_3uV_STEP 100000 25#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24 26#define DA9052_CONST_3uV 3000000 27 28#define DA9052_MIN_UA 0 29#define DA9052_MAX_UA 3 30#define DA9052_CURRENT_RANGE 4 31 32/* Bit masks */ 33#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c 34#define DA9052_BUCK_ILIM_MASK_ODD 0xc0 35 36/* DA9052 REGULATOR IDs */ 37#define DA9052_ID_BUCK1 0 38#define DA9052_ID_BUCK2 1 39#define DA9052_ID_BUCK3 2 40#define DA9052_ID_BUCK4 3 41#define DA9052_ID_LDO1 4 42#define DA9052_ID_LDO2 5 43#define DA9052_ID_LDO3 6 44#define DA9052_ID_LDO4 7 45#define DA9052_ID_LDO5 8 46#define DA9052_ID_LDO6 9 47#define DA9052_ID_LDO7 10 48#define DA9052_ID_LDO8 11 49#define DA9052_ID_LDO9 12 50#define DA9052_ID_LDO10 13 51 52static const u32 da9052_current_limits[3][4] = { 53 {700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */ 54 {1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */ 55 {800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO, 56 * BUCK-MEM and BUCK-PERI 57 */ 58}; 59 60struct da9052_regulator_info { 61 struct regulator_desc reg_desc; 62 int step_uV; 63 int min_uV; 64 int max_uV; 65 unsigned char activate_bit; 66}; 67 68struct da9052_regulator { 69 struct da9052 *da9052; 70 struct da9052_regulator_info *info; 71 struct regulator_dev *rdev; 72}; 73 74static int verify_range(struct da9052_regulator_info *info, 75 int min_uV, int max_uV) 76{ 77 if (min_uV > info->max_uV || max_uV < info->min_uV) 78 return -EINVAL; 79 80 return 0; 81} 82 83static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev) 84{ 85 struct da9052_regulator *regulator = rdev_get_drvdata(rdev); 86 int offset = rdev_get_id(rdev); 87 int ret, row = 2; 88 89 ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2); 90 if (ret < 0) 91 return ret; 92 93 /* Determine the even or odd position of the buck current limit 94 * register field 95 */ 96 if (offset % 2 == 0) 97 ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2; 98 else 99 ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6; 100 101 /* Select the appropriate current limit range */ 102 if (regulator->da9052->chip_id == DA9052) 103 row = 0; 104 else if (offset == 0) 105 row = 1; 106 107 return da9052_current_limits[row][ret]; 108} 109 110static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA, 111 int max_uA) 112{ 113 struct da9052_regulator *regulator = rdev_get_drvdata(rdev); 114 int offset = rdev_get_id(rdev); 115 int reg_val = 0; 116 int i, row = 2; 117 118 /* Select the appropriate current limit range */ 119 if (regulator->da9052->chip_id == DA9052) 120 row = 0; 121 else if (offset == 0) 122 row = 1; 123 124 for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) { 125 if ((min_uA <= da9052_current_limits[row][i]) && 126 (da9052_current_limits[row][i] <= max_uA)) { 127 reg_val = i; 128 break; 129 } 130 } 131 132 if (i < 0) 133 return -EINVAL; 134 135 /* Determine the even or odd position of the buck current limit 136 * register field 137 */ 138 if (offset % 2 == 0) 139 return da9052_reg_update(regulator->da9052, 140 DA9052_BUCKA_REG + offset/2, 141 DA9052_BUCK_ILIM_MASK_EVEN, 142 reg_val << 2); 143 else 144 return da9052_reg_update(regulator->da9052, 145 DA9052_BUCKA_REG + offset/2, 146 DA9052_BUCK_ILIM_MASK_ODD, 147 reg_val << 6); 148} 149 150static int da9052_list_voltage(struct regulator_dev *rdev, 151 unsigned int selector) 152{ 153 struct da9052_regulator *regulator = rdev_get_drvdata(rdev); 154 struct da9052_regulator_info *info = regulator->info; 155 int id = rdev_get_id(rdev); 156 int volt_uV; 157 158 if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052) 159 && (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) { 160 volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV) 161 + info->min_uV); 162 volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV) 163 * (DA9052_BUCK_PERI_3uV_STEP); 164 } else { 165 volt_uV = (selector * info->step_uV) + info->min_uV; 166 } 167 168 if (volt_uV > info->max_uV) 169 return -EINVAL; 170 171 return volt_uV; 172} 173 174static int da9052_map_voltage(struct regulator_dev *rdev, 175 int min_uV, int max_uV) 176{ 177 struct da9052_regulator *regulator = rdev_get_drvdata(rdev); 178 struct da9052_regulator_info *info = regulator->info; 179 int id = rdev_get_id(rdev); 180 int ret, sel; 181 182 ret = verify_range(info, min_uV, max_uV); 183 if (ret < 0) 184 return ret; 185 186 if (min_uV < info->min_uV) 187 min_uV = info->min_uV; 188 189 if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052) 190 && (min_uV >= DA9052_CONST_3uV)) { 191 sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV + 192 DIV_ROUND_UP(min_uV - DA9052_CONST_3uV, 193 DA9052_BUCK_PERI_3uV_STEP); 194 } else { 195 sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV); 196 } 197 198 ret = da9052_list_voltage(rdev, sel); 199 if (ret < 0) 200 return ret; 201 202 return sel; 203} 204 205static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev, 206 unsigned int selector) 207{ 208 struct da9052_regulator *regulator = rdev_get_drvdata(rdev); 209 struct da9052_regulator_info *info = regulator->info; 210 int id = rdev_get_id(rdev); 211 int ret; 212 213 ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg, 214 rdev->desc->vsel_mask, selector); 215 if (ret < 0) 216 return ret; 217 218 /* Some LDOs and DCDCs are DVC controlled which requires enabling of 219 * the activate bit to implment the changes on the output. 220 */ 221 switch (id) { 222 case DA9052_ID_BUCK1: 223 case DA9052_ID_BUCK2: 224 case DA9052_ID_BUCK3: 225 case DA9052_ID_LDO2: 226 case DA9052_ID_LDO3: 227 ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG, 228 info->activate_bit, info->activate_bit); 229 break; 230 } 231 232 return ret; 233} 234 235static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev, 236 unsigned int old_sel, 237 unsigned int new_sel) 238{ 239 struct da9052_regulator *regulator = rdev_get_drvdata(rdev); 240 struct da9052_regulator_info *info = regulator->info; 241 int id = rdev_get_id(rdev); 242 int ret = 0; 243 244 /* The DVC controlled LDOs and DCDCs ramp with 6.25mV/��s after enabling 245 * the activate bit. 246 */ 247 switch (id) { 248 case DA9052_ID_BUCK1: 249 case DA9052_ID_BUCK2: 250 case DA9052_ID_BUCK3: 251 case DA9052_ID_LDO2: 252 case DA9052_ID_LDO3: 253 ret = DIV_ROUND_UP(abs(new_sel - old_sel) * info->step_uV, 254 6250); 255 break; 256 } 257 258 return ret; 259} 260 261static const struct regulator_ops da9052_dcdc_ops = { 262 .get_current_limit = da9052_dcdc_get_current_limit, 263 .set_current_limit = da9052_dcdc_set_current_limit, 264 265 .list_voltage = da9052_list_voltage, 266 .map_voltage = da9052_map_voltage, 267 .get_voltage_sel = regulator_get_voltage_sel_regmap, 268 .set_voltage_sel = da9052_regulator_set_voltage_sel, 269 .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel, 270 .is_enabled = regulator_is_enabled_regmap, 271 .enable = regulator_enable_regmap, 272 .disable = regulator_disable_regmap, 273}; 274 275static const struct regulator_ops da9052_ldo_ops = { 276 .list_voltage = da9052_list_voltage, 277 .map_voltage = da9052_map_voltage, 278 .get_voltage_sel = regulator_get_voltage_sel_regmap, 279 .set_voltage_sel = da9052_regulator_set_voltage_sel, 280 .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel, 281 .is_enabled = regulator_is_enabled_regmap, 282 .enable = regulator_enable_regmap, 283 .disable = regulator_disable_regmap, 284}; 285 286#define DA9052_LDO(_id, _name, step, min, max, sbits, ebits, abits) \ 287{\ 288 .reg_desc = {\ 289 .name = #_name,\ 290 .of_match = of_match_ptr(#_name),\ 291 .regulators_node = of_match_ptr("regulators"),\ 292 .ops = &da9052_ldo_ops,\ 293 .type = REGULATOR_VOLTAGE,\ 294 .id = DA9052_ID_##_id,\ 295 .n_voltages = (max - min) / step + 1, \ 296 .owner = THIS_MODULE,\ 297 .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ 298 .vsel_mask = (1 << (sbits)) - 1,\ 299 .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ 300 .enable_mask = 1 << (ebits),\ 301 },\ 302 .min_uV = (min) * 1000,\ 303 .max_uV = (max) * 1000,\ 304 .step_uV = (step) * 1000,\ 305 .activate_bit = (abits),\ 306} 307 308#define DA9052_DCDC(_id, _name, step, min, max, sbits, ebits, abits) \ 309{\ 310 .reg_desc = {\ 311 .name = #_name,\ 312 .of_match = of_match_ptr(#_name),\ 313 .regulators_node = of_match_ptr("regulators"),\ 314 .ops = &da9052_dcdc_ops,\ 315 .type = REGULATOR_VOLTAGE,\ 316 .id = DA9052_ID_##_id,\ 317 .n_voltages = (max - min) / step + 1, \ 318 .owner = THIS_MODULE,\ 319 .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ 320 .vsel_mask = (1 << (sbits)) - 1,\ 321 .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ 322 .enable_mask = 1 << (ebits),\ 323 },\ 324 .min_uV = (min) * 1000,\ 325 .max_uV = (max) * 1000,\ 326 .step_uV = (step) * 1000,\ 327 .activate_bit = (abits),\ 328} 329 330static struct da9052_regulator_info da9052_regulator_info[] = { 331 DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO), 332 DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO), 333 DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO), 334 DA9052_DCDC(BUCK4, buck4, 50, 1800, 3600, 5, 6, 0), 335 DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0), 336 DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO), 337 DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO), 338 DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0), 339 DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0), 340 DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0), 341 DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0), 342 DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0), 343 DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0), 344 DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0), 345}; 346 347static struct da9052_regulator_info da9053_regulator_info[] = { 348 DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO), 349 DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO), 350 DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO), 351 DA9052_DCDC(BUCK4, buck4, 25, 950, 2525, 6, 6, 0), 352 DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0), 353 DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO), 354 DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO), 355 DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0), 356 DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0), 357 DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0), 358 DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0), 359 DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0), 360 DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0), 361 DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0), 362}; 363 364static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id, 365 int id) 366{ 367 struct da9052_regulator_info *info; 368 int i; 369 370 switch (chip_id) { 371 case DA9052: 372 for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) { 373 info = &da9052_regulator_info[i]; 374 if (info->reg_desc.id == id) 375 return info; 376 } 377 break; 378 case DA9053_AA: 379 case DA9053_BA: 380 case DA9053_BB: 381 case DA9053_BC: 382 for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) { 383 info = &da9053_regulator_info[i]; 384 if (info->reg_desc.id == id) 385 return info; 386 } 387 break; 388 } 389 390 return NULL; 391} 392 393static int da9052_regulator_probe(struct platform_device *pdev) 394{ 395 const struct mfd_cell *cell = mfd_get_cell(pdev); 396 struct regulator_config config = { }; 397 struct da9052_regulator *regulator; 398 struct da9052 *da9052; 399 struct da9052_pdata *pdata; 400 401 regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator), 402 GFP_KERNEL); 403 if (!regulator) 404 return -ENOMEM; 405 406 da9052 = dev_get_drvdata(pdev->dev.parent); 407 pdata = dev_get_platdata(da9052->dev); 408 regulator->da9052 = da9052; 409 410 regulator->info = find_regulator_info(regulator->da9052->chip_id, 411 cell->id); 412 if (regulator->info == NULL) { 413 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 414 return -EINVAL; 415 } 416 417 config.dev = da9052->dev; 418 config.driver_data = regulator; 419 config.regmap = da9052->regmap; 420 if (pdata) 421 config.init_data = pdata->regulators[cell->id]; 422 423 regulator->rdev = devm_regulator_register(&pdev->dev, 424 ®ulator->info->reg_desc, 425 &config); 426 if (IS_ERR(regulator->rdev)) { 427 dev_err(&pdev->dev, "failed to register regulator %s\n", 428 regulator->info->reg_desc.name); 429 return PTR_ERR(regulator->rdev); 430 } 431 432 platform_set_drvdata(pdev, regulator); 433 434 return 0; 435} 436 437static struct platform_driver da9052_regulator_driver = { 438 .probe = da9052_regulator_probe, 439 .driver = { 440 .name = "da9052-regulator", 441 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 442 }, 443}; 444 445static int __init da9052_regulator_init(void) 446{ 447 return platform_driver_register(&da9052_regulator_driver); 448} 449subsys_initcall(da9052_regulator_init); 450 451static void __exit da9052_regulator_exit(void) 452{ 453 platform_driver_unregister(&da9052_regulator_driver); 454} 455module_exit(da9052_regulator_exit); 456 457MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); 458MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC"); 459MODULE_LICENSE("GPL"); 460MODULE_ALIAS("platform:da9052-regulator"); 461