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 static const unsigned int ldo_vbus[] = { 123 5000000, 124 }; 125 126 /* DCDC group CSR: supported voltages in microvolts */ 127 static const struct regulator_linear_range dcdc_csr_ranges[] = { 128 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), 129 REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000), 130 REGULATOR_LINEAR_RANGE(900000, 56, 63, 0), 131 }; 132 133 /* DCDC group IOSR1: supported voltages in microvolts */ 134 static const struct regulator_linear_range dcdc_iosr1_ranges[] = { 135 REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000), 136 REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0), 137 REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0), 138 REGULATOR_LINEAR_RANGE(900000, 54, 63, 0), 139 }; 140 141 /* DCDC group SDSR1: supported voltages in microvolts */ 142 static const struct regulator_linear_range dcdc_sdsr1_ranges[] = { 143 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), 144 REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0), 145 REGULATOR_LINEAR_RANGE(900000, 52, 63, 0), 146 }; 147 148 struct bcm590xx_info { 149 const char *name; 150 const char *vin_name; 151 u8 n_voltages; 152 const unsigned int *volt_table; 153 u8 n_linear_ranges; 154 const struct regulator_linear_range *linear_ranges; 155 }; 156 157 #define BCM590XX_REG_TABLE(_name, _table) \ 158 { \ 159 .name = #_name, \ 160 .n_voltages = ARRAY_SIZE(_table), \ 161 .volt_table = _table, \ 162 } 163 164 #define BCM590XX_REG_RANGES(_name, _ranges) \ 165 { \ 166 .name = #_name, \ 167 .n_voltages = 64, \ 168 .n_linear_ranges = ARRAY_SIZE(_ranges), \ 169 .linear_ranges = _ranges, \ 170 } 171 172 static struct bcm590xx_info bcm590xx_regs[] = { 173 BCM590XX_REG_TABLE(rfldo, ldo_a_table), 174 BCM590XX_REG_TABLE(camldo1, ldo_c_table), 175 BCM590XX_REG_TABLE(camldo2, ldo_c_table), 176 BCM590XX_REG_TABLE(simldo1, ldo_a_table), 177 BCM590XX_REG_TABLE(simldo2, ldo_a_table), 178 BCM590XX_REG_TABLE(sdldo, ldo_c_table), 179 BCM590XX_REG_TABLE(sdxldo, ldo_a_table), 180 BCM590XX_REG_TABLE(mmcldo1, ldo_a_table), 181 BCM590XX_REG_TABLE(mmcldo2, ldo_a_table), 182 BCM590XX_REG_TABLE(audldo, ldo_a_table), 183 BCM590XX_REG_TABLE(micldo, ldo_a_table), 184 BCM590XX_REG_TABLE(usbldo, ldo_a_table), 185 BCM590XX_REG_TABLE(vibldo, ldo_c_table), 186 BCM590XX_REG_RANGES(csr, dcdc_csr_ranges), 187 BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges), 188 BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges), 189 BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges), 190 BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges), 191 BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges), 192 BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges), 193 BCM590XX_REG_TABLE(gpldo1, ldo_a_table), 194 BCM590XX_REG_TABLE(gpldo2, ldo_a_table), 195 BCM590XX_REG_TABLE(gpldo3, ldo_a_table), 196 BCM590XX_REG_TABLE(gpldo4, ldo_a_table), 197 BCM590XX_REG_TABLE(gpldo5, ldo_a_table), 198 BCM590XX_REG_TABLE(gpldo6, ldo_a_table), 199 BCM590XX_REG_TABLE(vbus, ldo_vbus), 200 }; 201 202 struct bcm590xx_reg { 203 struct regulator_desc *desc; 204 struct bcm590xx *mfd; 205 }; 206 207 static int bcm590xx_get_vsel_register(int id) 208 { 209 if (BCM590XX_REG_IS_LDO(id)) 210 return BCM590XX_RFLDOCTRL + id; 211 else if (BCM590XX_REG_IS_GPLDO(id)) 212 return BCM590XX_GPLDO1CTRL + id; 213 else 214 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3; 215 } 216 217 static int bcm590xx_get_enable_register(int id) 218 { 219 int reg = 0; 220 221 if (BCM590XX_REG_IS_LDO(id)) 222 reg = BCM590XX_RFLDOPMCTRL1 + id * 2; 223 else if (BCM590XX_REG_IS_GPLDO(id)) 224 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2; 225 else 226 switch (id) { 227 case BCM590XX_REG_CSR: 228 reg = BCM590XX_CSRPMCTRL1; 229 break; 230 case BCM590XX_REG_IOSR1: 231 reg = BCM590XX_IOSR1PMCTRL1; 232 break; 233 case BCM590XX_REG_IOSR2: 234 reg = BCM590XX_IOSR2PMCTRL1; 235 break; 236 case BCM590XX_REG_MSR: 237 reg = BCM590XX_MSRPMCTRL1; 238 break; 239 case BCM590XX_REG_SDSR1: 240 reg = BCM590XX_SDSR1PMCTRL1; 241 break; 242 case BCM590XX_REG_SDSR2: 243 reg = BCM590XX_SDSR2PMCTRL1; 244 break; 245 case BCM590XX_REG_VBUS: 246 reg = BCM590XX_OTG_CTRL; 247 } 248 249 250 return reg; 251 } 252 253 static struct regulator_ops bcm590xx_ops_ldo = { 254 .is_enabled = regulator_is_enabled_regmap, 255 .enable = regulator_enable_regmap, 256 .disable = regulator_disable_regmap, 257 .get_voltage_sel = regulator_get_voltage_sel_regmap, 258 .set_voltage_sel = regulator_set_voltage_sel_regmap, 259 .list_voltage = regulator_list_voltage_table, 260 .map_voltage = regulator_map_voltage_iterate, 261 }; 262 263 static struct regulator_ops bcm590xx_ops_dcdc = { 264 .is_enabled = regulator_is_enabled_regmap, 265 .enable = regulator_enable_regmap, 266 .disable = regulator_disable_regmap, 267 .get_voltage_sel = regulator_get_voltage_sel_regmap, 268 .set_voltage_sel = regulator_set_voltage_sel_regmap, 269 .list_voltage = regulator_list_voltage_linear_range, 270 .map_voltage = regulator_map_voltage_linear_range, 271 }; 272 273 static struct regulator_ops bcm590xx_ops_vbus = { 274 .is_enabled = regulator_is_enabled_regmap, 275 .enable = regulator_enable_regmap, 276 .disable = regulator_disable_regmap, 277 }; 278 279 #define BCM590XX_MATCH(_name, _id) \ 280 { \ 281 .name = #_name, \ 282 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \ 283 } 284 285 static struct of_regulator_match bcm590xx_matches[] = { 286 BCM590XX_MATCH(rfldo, RFLDO), 287 BCM590XX_MATCH(camldo1, CAMLDO1), 288 BCM590XX_MATCH(camldo2, CAMLDO2), 289 BCM590XX_MATCH(simldo1, SIMLDO1), 290 BCM590XX_MATCH(simldo2, SIMLDO2), 291 BCM590XX_MATCH(sdldo, SDLDO), 292 BCM590XX_MATCH(sdxldo, SDXLDO), 293 BCM590XX_MATCH(mmcldo1, MMCLDO1), 294 BCM590XX_MATCH(mmcldo2, MMCLDO2), 295 BCM590XX_MATCH(audldo, AUDLDO), 296 BCM590XX_MATCH(micldo, MICLDO), 297 BCM590XX_MATCH(usbldo, USBLDO), 298 BCM590XX_MATCH(vibldo, VIBLDO), 299 BCM590XX_MATCH(csr, CSR), 300 BCM590XX_MATCH(iosr1, IOSR1), 301 BCM590XX_MATCH(iosr2, IOSR2), 302 BCM590XX_MATCH(msr, MSR), 303 BCM590XX_MATCH(sdsr1, SDSR1), 304 BCM590XX_MATCH(sdsr2, SDSR2), 305 BCM590XX_MATCH(vsr, VSR), 306 BCM590XX_MATCH(gpldo1, GPLDO1), 307 BCM590XX_MATCH(gpldo2, GPLDO2), 308 BCM590XX_MATCH(gpldo3, GPLDO3), 309 BCM590XX_MATCH(gpldo4, GPLDO4), 310 BCM590XX_MATCH(gpldo5, GPLDO5), 311 BCM590XX_MATCH(gpldo6, GPLDO6), 312 BCM590XX_MATCH(vbus, VBUS), 313 }; 314 315 static struct bcm590xx_board *bcm590xx_parse_dt_reg_data( 316 struct platform_device *pdev, 317 struct of_regulator_match **bcm590xx_reg_matches) 318 { 319 struct bcm590xx_board *data; 320 struct device_node *np = pdev->dev.parent->of_node; 321 struct device_node *regulators; 322 struct of_regulator_match *matches = bcm590xx_matches; 323 int count = ARRAY_SIZE(bcm590xx_matches); 324 int idx = 0; 325 int ret; 326 327 if (!np) { 328 dev_err(&pdev->dev, "of node not found\n"); 329 return NULL; 330 } 331 332 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 333 if (!data) 334 return NULL; 335 336 np = of_node_get(np); 337 regulators = of_get_child_by_name(np, "regulators"); 338 if (!regulators) { 339 dev_warn(&pdev->dev, "regulator node not found\n"); 340 return NULL; 341 } 342 343 ret = of_regulator_match(&pdev->dev, regulators, matches, count); 344 of_node_put(regulators); 345 if (ret < 0) { 346 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", 347 ret); 348 return NULL; 349 } 350 351 *bcm590xx_reg_matches = matches; 352 353 for (idx = 0; idx < count; idx++) { 354 if (!matches[idx].init_data || !matches[idx].of_node) 355 continue; 356 357 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data; 358 } 359 360 return data; 361 } 362 363 static int bcm590xx_probe(struct platform_device *pdev) 364 { 365 struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent); 366 struct bcm590xx_board *pmu_data = NULL; 367 struct bcm590xx_reg *pmu; 368 struct regulator_config config = { }; 369 struct bcm590xx_info *info; 370 struct regulator_init_data *reg_data; 371 struct regulator_dev *rdev; 372 struct of_regulator_match *bcm590xx_reg_matches = NULL; 373 int i; 374 375 pmu_data = bcm590xx_parse_dt_reg_data(pdev, 376 &bcm590xx_reg_matches); 377 378 pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL); 379 if (!pmu) 380 return -ENOMEM; 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 return -ENOMEM; 390 391 info = bcm590xx_regs; 392 393 for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) { 394 if (pmu_data) 395 reg_data = pmu_data->bcm590xx_pmu_init_data[i]; 396 else 397 reg_data = NULL; 398 399 /* Register the regulators */ 400 pmu->desc[i].name = info->name; 401 pmu->desc[i].supply_name = info->vin_name; 402 pmu->desc[i].id = i; 403 pmu->desc[i].volt_table = info->volt_table; 404 pmu->desc[i].n_voltages = info->n_voltages; 405 pmu->desc[i].linear_ranges = info->linear_ranges; 406 pmu->desc[i].n_linear_ranges = info->n_linear_ranges; 407 408 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) { 409 pmu->desc[i].ops = &bcm590xx_ops_ldo; 410 pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK; 411 } else if (BCM590XX_REG_IS_VBUS(i)) 412 pmu->desc[i].ops = &bcm590xx_ops_vbus; 413 else { 414 pmu->desc[i].ops = &bcm590xx_ops_dcdc; 415 pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK; 416 } 417 418 if (BCM590XX_REG_IS_VBUS(i)) 419 pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE; 420 else { 421 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i); 422 pmu->desc[i].enable_is_inverted = true; 423 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE; 424 } 425 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i); 426 pmu->desc[i].type = REGULATOR_VOLTAGE; 427 pmu->desc[i].owner = THIS_MODULE; 428 429 config.dev = bcm590xx->dev; 430 config.init_data = reg_data; 431 config.driver_data = pmu; 432 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i)) 433 config.regmap = bcm590xx->regmap_sec; 434 else 435 config.regmap = bcm590xx->regmap_pri; 436 437 if (bcm590xx_reg_matches) 438 config.of_node = bcm590xx_reg_matches[i].of_node; 439 440 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i], 441 &config); 442 if (IS_ERR(rdev)) { 443 dev_err(bcm590xx->dev, 444 "failed to register %s regulator\n", 445 pdev->name); 446 return PTR_ERR(rdev); 447 } 448 } 449 450 return 0; 451 } 452 453 static struct platform_driver bcm590xx_regulator_driver = { 454 .driver = { 455 .name = "bcm590xx-vregs", 456 }, 457 .probe = bcm590xx_probe, 458 }; 459 module_platform_driver(bcm590xx_regulator_driver); 460 461 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); 462 MODULE_DESCRIPTION("BCM590xx voltage regulator driver"); 463 MODULE_LICENSE("GPL v2"); 464 MODULE_ALIAS("platform:bcm590xx-vregs"); 465