1 /* 2 * Broadcom BCM590xx regulator driver 3 * 4 * Copyright 2014 Linaro Limited 5 * Author: Matt Porter <mporter@linaro.org> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 */ 12 13 #include <linux/err.h> 14 #include <linux/init.h> 15 #include <linux/kernel.h> 16 #include <linux/mfd/bcm590xx.h> 17 #include <linux/module.h> 18 #include <linux/of.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/slab.h> 24 25 /* I2C slave 0 registers */ 26 #define BCM590XX_RFLDOPMCTRL1 0x60 27 #define BCM590XX_IOSR1PMCTRL1 0x7a 28 #define BCM590XX_IOSR2PMCTRL1 0x7c 29 #define BCM590XX_CSRPMCTRL1 0x7e 30 #define BCM590XX_SDSR1PMCTRL1 0x82 31 #define BCM590XX_SDSR2PMCTRL1 0x86 32 #define BCM590XX_MSRPMCTRL1 0x8a 33 #define BCM590XX_VSRPMCTRL1 0x8e 34 #define BCM590XX_RFLDOCTRL 0x96 35 #define BCM590XX_CSRVOUT1 0xc0 36 37 /* I2C slave 1 registers */ 38 #define BCM590XX_GPLDO5PMCTRL1 0x16 39 #define BCM590XX_GPLDO6PMCTRL1 0x18 40 #define BCM590XX_GPLDO1CTRL 0x1a 41 #define BCM590XX_GPLDO2CTRL 0x1b 42 #define BCM590XX_GPLDO3CTRL 0x1c 43 #define BCM590XX_GPLDO4CTRL 0x1d 44 #define BCM590XX_GPLDO5CTRL 0x1e 45 #define BCM590XX_GPLDO6CTRL 0x1f 46 #define BCM590XX_OTG_CTRL 0x40 47 #define BCM590XX_GPLDO1PMCTRL1 0x57 48 #define BCM590XX_GPLDO2PMCTRL1 0x59 49 #define BCM590XX_GPLDO3PMCTRL1 0x5b 50 #define BCM590XX_GPLDO4PMCTRL1 0x5d 51 52 #define BCM590XX_REG_ENABLE BIT(7) 53 #define BCM590XX_VBUS_ENABLE BIT(2) 54 #define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3) 55 #define BCM590XX_SR_VSEL_MASK GENMASK(5, 0) 56 57 /* 58 * RFLDO to VSR regulators are 59 * accessed via I2C slave 0 60 */ 61 62 /* LDO regulator IDs */ 63 #define BCM590XX_REG_RFLDO 0 64 #define BCM590XX_REG_CAMLDO1 1 65 #define BCM590XX_REG_CAMLDO2 2 66 #define BCM590XX_REG_SIMLDO1 3 67 #define BCM590XX_REG_SIMLDO2 4 68 #define BCM590XX_REG_SDLDO 5 69 #define BCM590XX_REG_SDXLDO 6 70 #define BCM590XX_REG_MMCLDO1 7 71 #define BCM590XX_REG_MMCLDO2 8 72 #define BCM590XX_REG_AUDLDO 9 73 #define BCM590XX_REG_MICLDO 10 74 #define BCM590XX_REG_USBLDO 11 75 #define BCM590XX_REG_VIBLDO 12 76 77 /* DCDC regulator IDs */ 78 #define BCM590XX_REG_CSR 13 79 #define BCM590XX_REG_IOSR1 14 80 #define BCM590XX_REG_IOSR2 15 81 #define BCM590XX_REG_MSR 16 82 #define BCM590XX_REG_SDSR1 17 83 #define BCM590XX_REG_SDSR2 18 84 #define BCM590XX_REG_VSR 19 85 86 /* 87 * GPLDO1 to VBUS regulators are 88 * accessed via I2C slave 1 89 */ 90 91 #define BCM590XX_REG_GPLDO1 20 92 #define BCM590XX_REG_GPLDO2 21 93 #define BCM590XX_REG_GPLDO3 22 94 #define BCM590XX_REG_GPLDO4 23 95 #define BCM590XX_REG_GPLDO5 24 96 #define BCM590XX_REG_GPLDO6 25 97 #define BCM590XX_REG_VBUS 26 98 99 #define BCM590XX_NUM_REGS 27 100 101 #define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR) 102 #define BCM590XX_REG_IS_GPLDO(n) \ 103 ((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS)) 104 #define BCM590XX_REG_IS_VBUS(n) (n == BCM590XX_REG_VBUS) 105 106 struct bcm590xx_board { 107 struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS]; 108 }; 109 110 /* LDO group A: supported voltages in microvolts */ 111 static const unsigned int ldo_a_table[] = { 112 1200000, 1800000, 2500000, 2700000, 2800000, 113 2900000, 3000000, 3300000, 114 }; 115 116 /* LDO group C: supported voltages in microvolts */ 117 static const unsigned int ldo_c_table[] = { 118 3100000, 1800000, 2500000, 2700000, 2800000, 119 2900000, 3000000, 3300000, 120 }; 121 122 /* DCDC group CSR: supported voltages in microvolts */ 123 static const struct regulator_linear_range dcdc_csr_ranges[] = { 124 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), 125 REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000), 126 REGULATOR_LINEAR_RANGE(900000, 56, 63, 0), 127 }; 128 129 /* DCDC group IOSR1: supported voltages in microvolts */ 130 static const struct regulator_linear_range dcdc_iosr1_ranges[] = { 131 REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000), 132 REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0), 133 REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0), 134 REGULATOR_LINEAR_RANGE(900000, 54, 63, 0), 135 }; 136 137 /* DCDC group SDSR1: supported voltages in microvolts */ 138 static const struct regulator_linear_range dcdc_sdsr1_ranges[] = { 139 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), 140 REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0), 141 REGULATOR_LINEAR_RANGE(900000, 52, 63, 0), 142 }; 143 144 struct bcm590xx_info { 145 const char *name; 146 const char *vin_name; 147 u8 n_voltages; 148 const unsigned int *volt_table; 149 u8 n_linear_ranges; 150 const struct regulator_linear_range *linear_ranges; 151 }; 152 153 #define BCM590XX_REG_TABLE(_name, _table) \ 154 { \ 155 .name = #_name, \ 156 .n_voltages = ARRAY_SIZE(_table), \ 157 .volt_table = _table, \ 158 } 159 160 #define BCM590XX_REG_RANGES(_name, _ranges) \ 161 { \ 162 .name = #_name, \ 163 .n_voltages = 64, \ 164 .n_linear_ranges = ARRAY_SIZE(_ranges), \ 165 .linear_ranges = _ranges, \ 166 } 167 168 static struct bcm590xx_info bcm590xx_regs[] = { 169 BCM590XX_REG_TABLE(rfldo, ldo_a_table), 170 BCM590XX_REG_TABLE(camldo1, ldo_c_table), 171 BCM590XX_REG_TABLE(camldo2, ldo_c_table), 172 BCM590XX_REG_TABLE(simldo1, ldo_a_table), 173 BCM590XX_REG_TABLE(simldo2, ldo_a_table), 174 BCM590XX_REG_TABLE(sdldo, ldo_c_table), 175 BCM590XX_REG_TABLE(sdxldo, ldo_a_table), 176 BCM590XX_REG_TABLE(mmcldo1, ldo_a_table), 177 BCM590XX_REG_TABLE(mmcldo2, ldo_a_table), 178 BCM590XX_REG_TABLE(audldo, ldo_a_table), 179 BCM590XX_REG_TABLE(micldo, ldo_a_table), 180 BCM590XX_REG_TABLE(usbldo, ldo_a_table), 181 BCM590XX_REG_TABLE(vibldo, ldo_c_table), 182 BCM590XX_REG_RANGES(csr, dcdc_csr_ranges), 183 BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges), 184 BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges), 185 BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges), 186 BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges), 187 BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges), 188 BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges), 189 BCM590XX_REG_TABLE(gpldo1, ldo_a_table), 190 BCM590XX_REG_TABLE(gpldo2, ldo_a_table), 191 BCM590XX_REG_TABLE(gpldo3, ldo_a_table), 192 BCM590XX_REG_TABLE(gpldo4, ldo_a_table), 193 BCM590XX_REG_TABLE(gpldo5, ldo_a_table), 194 BCM590XX_REG_TABLE(gpldo6, ldo_a_table), 195 }; 196 197 struct bcm590xx_reg { 198 struct regulator_desc *desc; 199 struct bcm590xx *mfd; 200 struct bcm590xx_info **info; 201 }; 202 203 static int bcm590xx_get_vsel_register(int id) 204 { 205 if (BCM590XX_REG_IS_LDO(id)) 206 return BCM590XX_RFLDOCTRL + id; 207 else if (BCM590XX_REG_IS_GPLDO(id)) 208 return BCM590XX_GPLDO1CTRL + id; 209 else 210 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3; 211 } 212 213 static int bcm590xx_get_enable_register(int id) 214 { 215 int reg = 0; 216 217 if (BCM590XX_REG_IS_LDO(id)) 218 reg = BCM590XX_RFLDOPMCTRL1 + id * 2; 219 else if (BCM590XX_REG_IS_GPLDO(id)) 220 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2; 221 else 222 switch (id) { 223 case BCM590XX_REG_CSR: 224 reg = BCM590XX_CSRPMCTRL1; 225 break; 226 case BCM590XX_REG_IOSR1: 227 reg = BCM590XX_IOSR1PMCTRL1; 228 break; 229 case BCM590XX_REG_IOSR2: 230 reg = BCM590XX_IOSR2PMCTRL1; 231 break; 232 case BCM590XX_REG_MSR: 233 reg = BCM590XX_MSRPMCTRL1; 234 break; 235 case BCM590XX_REG_SDSR1: 236 reg = BCM590XX_SDSR1PMCTRL1; 237 break; 238 case BCM590XX_REG_SDSR2: 239 reg = BCM590XX_SDSR2PMCTRL1; 240 break; 241 case BCM590XX_REG_VBUS: 242 reg = BCM590XX_OTG_CTRL; 243 }; 244 245 246 return reg; 247 } 248 249 static struct regulator_ops bcm590xx_ops_ldo = { 250 .is_enabled = regulator_is_enabled_regmap, 251 .enable = regulator_enable_regmap, 252 .disable = regulator_disable_regmap, 253 .get_voltage_sel = regulator_get_voltage_sel_regmap, 254 .set_voltage_sel = regulator_set_voltage_sel_regmap, 255 .list_voltage = regulator_list_voltage_table, 256 .map_voltage = regulator_map_voltage_iterate, 257 }; 258 259 static struct regulator_ops bcm590xx_ops_dcdc = { 260 .is_enabled = regulator_is_enabled_regmap, 261 .enable = regulator_enable_regmap, 262 .disable = regulator_disable_regmap, 263 .get_voltage_sel = regulator_get_voltage_sel_regmap, 264 .set_voltage_sel = regulator_set_voltage_sel_regmap, 265 .list_voltage = regulator_list_voltage_linear_range, 266 .map_voltage = regulator_map_voltage_linear_range, 267 }; 268 269 static struct regulator_ops bcm590xx_ops_vbus = { 270 .is_enabled = regulator_is_enabled_regmap, 271 .enable = regulator_enable_regmap, 272 .disable = regulator_disable_regmap, 273 }; 274 275 #define BCM590XX_MATCH(_name, _id) \ 276 { \ 277 .name = #_name, \ 278 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \ 279 } 280 281 static struct of_regulator_match bcm590xx_matches[] = { 282 BCM590XX_MATCH(rfldo, RFLDO), 283 BCM590XX_MATCH(camldo1, CAMLDO1), 284 BCM590XX_MATCH(camldo2, CAMLDO2), 285 BCM590XX_MATCH(simldo1, SIMLDO1), 286 BCM590XX_MATCH(simldo2, SIMLDO2), 287 BCM590XX_MATCH(sdldo, SDLDO), 288 BCM590XX_MATCH(sdxldo, SDXLDO), 289 BCM590XX_MATCH(mmcldo1, MMCLDO1), 290 BCM590XX_MATCH(mmcldo2, MMCLDO2), 291 BCM590XX_MATCH(audldo, AUDLDO), 292 BCM590XX_MATCH(micldo, MICLDO), 293 BCM590XX_MATCH(usbldo, USBLDO), 294 BCM590XX_MATCH(vibldo, VIBLDO), 295 BCM590XX_MATCH(csr, CSR), 296 BCM590XX_MATCH(iosr1, IOSR1), 297 BCM590XX_MATCH(iosr2, IOSR2), 298 BCM590XX_MATCH(msr, MSR), 299 BCM590XX_MATCH(sdsr1, SDSR1), 300 BCM590XX_MATCH(sdsr2, SDSR2), 301 BCM590XX_MATCH(vsr, VSR), 302 BCM590XX_MATCH(gpldo1, GPLDO1), 303 BCM590XX_MATCH(gpldo2, GPLDO2), 304 BCM590XX_MATCH(gpldo3, GPLDO3), 305 BCM590XX_MATCH(gpldo4, GPLDO4), 306 BCM590XX_MATCH(gpldo5, GPLDO5), 307 BCM590XX_MATCH(gpldo6, GPLDO6), 308 BCM590XX_MATCH(vbus, VBUS), 309 }; 310 311 static struct bcm590xx_board *bcm590xx_parse_dt_reg_data( 312 struct platform_device *pdev, 313 struct of_regulator_match **bcm590xx_reg_matches) 314 { 315 struct bcm590xx_board *data; 316 struct device_node *np = pdev->dev.parent->of_node; 317 struct device_node *regulators; 318 struct of_regulator_match *matches = bcm590xx_matches; 319 int count = ARRAY_SIZE(bcm590xx_matches); 320 int idx = 0; 321 int ret; 322 323 if (!np) { 324 dev_err(&pdev->dev, "of node not found\n"); 325 return NULL; 326 } 327 328 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 329 if (!data) { 330 dev_err(&pdev->dev, "failed to allocate regulator board data\n"); 331 return NULL; 332 } 333 334 np = of_node_get(np); 335 regulators = of_get_child_by_name(np, "regulators"); 336 if (!regulators) { 337 dev_warn(&pdev->dev, "regulator node not found\n"); 338 return NULL; 339 } 340 341 ret = of_regulator_match(&pdev->dev, regulators, matches, count); 342 of_node_put(regulators); 343 if (ret < 0) { 344 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", 345 ret); 346 return NULL; 347 } 348 349 *bcm590xx_reg_matches = matches; 350 351 for (idx = 0; idx < count; idx++) { 352 if (!matches[idx].init_data || !matches[idx].of_node) 353 continue; 354 355 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data; 356 } 357 358 return data; 359 } 360 361 static int bcm590xx_probe(struct platform_device *pdev) 362 { 363 struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent); 364 struct bcm590xx_board *pmu_data = NULL; 365 struct bcm590xx_reg *pmu; 366 struct regulator_config config = { }; 367 struct bcm590xx_info *info; 368 struct regulator_init_data *reg_data; 369 struct regulator_dev *rdev; 370 struct of_regulator_match *bcm590xx_reg_matches = NULL; 371 int i; 372 373 pmu_data = bcm590xx_parse_dt_reg_data(pdev, 374 &bcm590xx_reg_matches); 375 376 pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL); 377 if (!pmu) { 378 dev_err(&pdev->dev, "Memory allocation failed for pmu\n"); 379 return -ENOMEM; 380 } 381 382 pmu->mfd = bcm590xx; 383 384 platform_set_drvdata(pdev, pmu); 385 386 pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS * 387 sizeof(struct regulator_desc), GFP_KERNEL); 388 if (!pmu->desc) { 389 dev_err(&pdev->dev, "Memory alloc fails for desc\n"); 390 return -ENOMEM; 391 } 392 393 pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS * 394 sizeof(struct bcm590xx_info *), GFP_KERNEL); 395 if (!pmu->info) { 396 dev_err(&pdev->dev, "Memory alloc fails for info\n"); 397 return -ENOMEM; 398 } 399 400 info = bcm590xx_regs; 401 402 for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) { 403 if (pmu_data) 404 reg_data = pmu_data->bcm590xx_pmu_init_data[i]; 405 else 406 reg_data = NULL; 407 408 /* Register the regulators */ 409 pmu->info[i] = info; 410 411 pmu->desc[i].name = info->name; 412 pmu->desc[i].supply_name = info->vin_name; 413 pmu->desc[i].id = i; 414 pmu->desc[i].volt_table = info->volt_table; 415 pmu->desc[i].n_voltages = info->n_voltages; 416 pmu->desc[i].linear_ranges = info->linear_ranges; 417 pmu->desc[i].n_linear_ranges = info->n_linear_ranges; 418 419 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) { 420 pmu->desc[i].ops = &bcm590xx_ops_ldo; 421 pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK; 422 } else if (BCM590XX_REG_IS_VBUS(i)) 423 pmu->desc[i].ops = &bcm590xx_ops_vbus; 424 else { 425 pmu->desc[i].ops = &bcm590xx_ops_dcdc; 426 pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK; 427 } 428 429 if (BCM590XX_REG_IS_VBUS(i)) 430 pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE; 431 else { 432 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i); 433 pmu->desc[i].enable_is_inverted = true; 434 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE; 435 } 436 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i); 437 pmu->desc[i].type = REGULATOR_VOLTAGE; 438 pmu->desc[i].owner = THIS_MODULE; 439 440 config.dev = bcm590xx->dev; 441 config.init_data = reg_data; 442 config.driver_data = pmu; 443 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i)) 444 config.regmap = bcm590xx->regmap_sec; 445 else 446 config.regmap = bcm590xx->regmap_pri; 447 448 if (bcm590xx_reg_matches) 449 config.of_node = bcm590xx_reg_matches[i].of_node; 450 451 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i], 452 &config); 453 if (IS_ERR(rdev)) { 454 dev_err(bcm590xx->dev, 455 "failed to register %s regulator\n", 456 pdev->name); 457 return PTR_ERR(rdev); 458 } 459 } 460 461 return 0; 462 } 463 464 static struct platform_driver bcm590xx_regulator_driver = { 465 .driver = { 466 .name = "bcm590xx-vregs", 467 .owner = THIS_MODULE, 468 }, 469 .probe = bcm590xx_probe, 470 }; 471 module_platform_driver(bcm590xx_regulator_driver); 472 473 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); 474 MODULE_DESCRIPTION("BCM590xx voltage regulator driver"); 475 MODULE_LICENSE("GPL v2"); 476 MODULE_ALIAS("platform:bcm590xx-vregs"); 477