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 /* Register defs */ 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_REG_ENABLE BIT(7) 35 36 #define BCM590XX_RFLDOCTRL 0x96 37 #define BCM590XX_CSRVOUT1 0xc0 38 #define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3) 39 #define BCM590XX_SR_VSEL_MASK GENMASK(5, 0) 40 41 /* LDO regulator IDs */ 42 #define BCM590XX_REG_RFLDO 0 43 #define BCM590XX_REG_CAMLDO1 1 44 #define BCM590XX_REG_CAMLDO2 2 45 #define BCM590XX_REG_SIMLDO1 3 46 #define BCM590XX_REG_SIMLDO2 4 47 #define BCM590XX_REG_SDLDO 5 48 #define BCM590XX_REG_SDXLDO 6 49 #define BCM590XX_REG_MMCLDO1 7 50 #define BCM590XX_REG_MMCLDO2 8 51 #define BCM590XX_REG_AUDLDO 9 52 #define BCM590XX_REG_MICLDO 10 53 #define BCM590XX_REG_USBLDO 11 54 #define BCM590XX_REG_VIBLDO 12 55 56 /* DCDC regulator IDs */ 57 #define BCM590XX_REG_CSR 13 58 #define BCM590XX_REG_IOSR1 14 59 #define BCM590XX_REG_IOSR2 15 60 #define BCM590XX_REG_MSR 16 61 #define BCM590XX_REG_SDSR1 17 62 #define BCM590XX_REG_SDSR2 18 63 #define BCM590XX_REG_VSR 19 64 65 #define BCM590XX_NUM_REGS 20 66 67 #define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR) 68 69 struct bcm590xx_board { 70 struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS]; 71 }; 72 73 /* LDO group A: supported voltages in microvolts */ 74 static const unsigned int ldo_a_table[] = { 75 1200000, 1800000, 2500000, 2700000, 2800000, 76 2900000, 3000000, 3300000, 77 }; 78 79 /* LDO group C: supported voltages in microvolts */ 80 static const unsigned int ldo_c_table[] = { 81 3100000, 1800000, 2500000, 2700000, 2800000, 82 2900000, 3000000, 3300000, 83 }; 84 85 /* DCDC group CSR: supported voltages in microvolts */ 86 static const struct regulator_linear_range dcdc_csr_ranges[] = { 87 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), 88 REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000), 89 REGULATOR_LINEAR_RANGE(900000, 56, 63, 0), 90 }; 91 92 /* DCDC group IOSR1: supported voltages in microvolts */ 93 static const struct regulator_linear_range dcdc_iosr1_ranges[] = { 94 REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000), 95 REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0), 96 REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0), 97 REGULATOR_LINEAR_RANGE(900000, 54, 63, 0), 98 }; 99 100 /* DCDC group SDSR1: supported voltages in microvolts */ 101 static const struct regulator_linear_range dcdc_sdsr1_ranges[] = { 102 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), 103 REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0), 104 REGULATOR_LINEAR_RANGE(900000, 52, 63, 0), 105 }; 106 107 struct bcm590xx_info { 108 const char *name; 109 const char *vin_name; 110 u8 n_voltages; 111 const unsigned int *volt_table; 112 u8 n_linear_ranges; 113 const struct regulator_linear_range *linear_ranges; 114 }; 115 116 #define BCM590XX_REG_TABLE(_name, _table) \ 117 { \ 118 .name = #_name, \ 119 .n_voltages = ARRAY_SIZE(_table), \ 120 .volt_table = _table, \ 121 } 122 123 #define BCM590XX_REG_RANGES(_name, _ranges) \ 124 { \ 125 .name = #_name, \ 126 .n_voltages = 64, \ 127 .n_linear_ranges = ARRAY_SIZE(_ranges), \ 128 .linear_ranges = _ranges, \ 129 } 130 131 static struct bcm590xx_info bcm590xx_regs[] = { 132 BCM590XX_REG_TABLE(rfldo, ldo_a_table), 133 BCM590XX_REG_TABLE(camldo1, ldo_c_table), 134 BCM590XX_REG_TABLE(camldo2, ldo_c_table), 135 BCM590XX_REG_TABLE(simldo1, ldo_a_table), 136 BCM590XX_REG_TABLE(simldo2, ldo_a_table), 137 BCM590XX_REG_TABLE(sdldo, ldo_c_table), 138 BCM590XX_REG_TABLE(sdxldo, ldo_a_table), 139 BCM590XX_REG_TABLE(mmcldo1, ldo_a_table), 140 BCM590XX_REG_TABLE(mmcldo2, ldo_a_table), 141 BCM590XX_REG_TABLE(audldo, ldo_a_table), 142 BCM590XX_REG_TABLE(micldo, ldo_a_table), 143 BCM590XX_REG_TABLE(usbldo, ldo_a_table), 144 BCM590XX_REG_TABLE(vibldo, ldo_c_table), 145 BCM590XX_REG_RANGES(csr, dcdc_csr_ranges), 146 BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges), 147 BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges), 148 BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges), 149 BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges), 150 BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges), 151 BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges), 152 }; 153 154 struct bcm590xx_reg { 155 struct regulator_desc *desc; 156 struct bcm590xx *mfd; 157 struct bcm590xx_info **info; 158 }; 159 160 static int bcm590xx_get_vsel_register(int id) 161 { 162 if (BCM590XX_REG_IS_LDO(id)) 163 return BCM590XX_RFLDOCTRL + id; 164 else 165 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3; 166 } 167 168 static int bcm590xx_get_enable_register(int id) 169 { 170 int reg = 0; 171 172 if (BCM590XX_REG_IS_LDO(id)) 173 reg = BCM590XX_RFLDOPMCTRL1 + id * 2; 174 else 175 switch (id) { 176 case BCM590XX_REG_CSR: 177 reg = BCM590XX_CSRPMCTRL1; 178 break; 179 case BCM590XX_REG_IOSR1: 180 reg = BCM590XX_IOSR1PMCTRL1; 181 break; 182 case BCM590XX_REG_IOSR2: 183 reg = BCM590XX_IOSR2PMCTRL1; 184 break; 185 case BCM590XX_REG_MSR: 186 reg = BCM590XX_MSRPMCTRL1; 187 break; 188 case BCM590XX_REG_SDSR1: 189 reg = BCM590XX_SDSR1PMCTRL1; 190 break; 191 case BCM590XX_REG_SDSR2: 192 reg = BCM590XX_SDSR2PMCTRL1; 193 break; 194 }; 195 196 return reg; 197 } 198 199 static struct regulator_ops bcm590xx_ops_ldo = { 200 .is_enabled = regulator_is_enabled_regmap, 201 .enable = regulator_enable_regmap, 202 .disable = regulator_disable_regmap, 203 .get_voltage_sel = regulator_get_voltage_sel_regmap, 204 .set_voltage_sel = regulator_set_voltage_sel_regmap, 205 .list_voltage = regulator_list_voltage_table, 206 .map_voltage = regulator_map_voltage_iterate, 207 }; 208 209 static struct regulator_ops bcm590xx_ops_dcdc = { 210 .is_enabled = regulator_is_enabled_regmap, 211 .enable = regulator_enable_regmap, 212 .disable = regulator_disable_regmap, 213 .get_voltage_sel = regulator_get_voltage_sel_regmap, 214 .set_voltage_sel = regulator_set_voltage_sel_regmap, 215 .list_voltage = regulator_list_voltage_linear_range, 216 .map_voltage = regulator_map_voltage_linear_range, 217 }; 218 219 #define BCM590XX_MATCH(_name, _id) \ 220 { \ 221 .name = #_name, \ 222 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \ 223 } 224 225 static struct of_regulator_match bcm590xx_matches[] = { 226 BCM590XX_MATCH(rfldo, RFLDO), 227 BCM590XX_MATCH(camldo1, CAMLDO1), 228 BCM590XX_MATCH(camldo2, CAMLDO2), 229 BCM590XX_MATCH(simldo1, SIMLDO1), 230 BCM590XX_MATCH(simldo2, SIMLDO2), 231 BCM590XX_MATCH(sdldo, SDLDO), 232 BCM590XX_MATCH(sdxldo, SDXLDO), 233 BCM590XX_MATCH(mmcldo1, MMCLDO1), 234 BCM590XX_MATCH(mmcldo2, MMCLDO2), 235 BCM590XX_MATCH(audldo, AUDLDO), 236 BCM590XX_MATCH(micldo, MICLDO), 237 BCM590XX_MATCH(usbldo, USBLDO), 238 BCM590XX_MATCH(vibldo, VIBLDO), 239 BCM590XX_MATCH(csr, CSR), 240 BCM590XX_MATCH(iosr1, IOSR1), 241 BCM590XX_MATCH(iosr2, IOSR2), 242 BCM590XX_MATCH(msr, MSR), 243 BCM590XX_MATCH(sdsr1, SDSR1), 244 BCM590XX_MATCH(sdsr2, SDSR2), 245 BCM590XX_MATCH(vsr, VSR), 246 }; 247 248 static struct bcm590xx_board *bcm590xx_parse_dt_reg_data( 249 struct platform_device *pdev, 250 struct of_regulator_match **bcm590xx_reg_matches) 251 { 252 struct bcm590xx_board *data; 253 struct device_node *np = pdev->dev.parent->of_node; 254 struct device_node *regulators; 255 struct of_regulator_match *matches = bcm590xx_matches; 256 int count = ARRAY_SIZE(bcm590xx_matches); 257 int idx = 0; 258 int ret; 259 260 if (!np) { 261 dev_err(&pdev->dev, "of node not found\n"); 262 return NULL; 263 } 264 265 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 266 if (!data) { 267 dev_err(&pdev->dev, "failed to allocate regulator board data\n"); 268 return NULL; 269 } 270 271 np = of_node_get(np); 272 regulators = of_get_child_by_name(np, "regulators"); 273 if (!regulators) { 274 dev_warn(&pdev->dev, "regulator node not found\n"); 275 return NULL; 276 } 277 278 ret = of_regulator_match(&pdev->dev, regulators, matches, count); 279 of_node_put(regulators); 280 if (ret < 0) { 281 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", 282 ret); 283 return NULL; 284 } 285 286 *bcm590xx_reg_matches = matches; 287 288 for (idx = 0; idx < count; idx++) { 289 if (!matches[idx].init_data || !matches[idx].of_node) 290 continue; 291 292 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data; 293 } 294 295 return data; 296 } 297 298 static int bcm590xx_probe(struct platform_device *pdev) 299 { 300 struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent); 301 struct bcm590xx_board *pmu_data = NULL; 302 struct bcm590xx_reg *pmu; 303 struct regulator_config config = { }; 304 struct bcm590xx_info *info; 305 struct regulator_init_data *reg_data; 306 struct regulator_dev *rdev; 307 struct of_regulator_match *bcm590xx_reg_matches = NULL; 308 int i; 309 310 pmu_data = bcm590xx_parse_dt_reg_data(pdev, 311 &bcm590xx_reg_matches); 312 313 pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL); 314 if (!pmu) { 315 dev_err(&pdev->dev, "Memory allocation failed for pmu\n"); 316 return -ENOMEM; 317 } 318 319 pmu->mfd = bcm590xx; 320 321 platform_set_drvdata(pdev, pmu); 322 323 pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS * 324 sizeof(struct regulator_desc), GFP_KERNEL); 325 if (!pmu->desc) { 326 dev_err(&pdev->dev, "Memory alloc fails for desc\n"); 327 return -ENOMEM; 328 } 329 330 pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS * 331 sizeof(struct bcm590xx_info *), GFP_KERNEL); 332 if (!pmu->info) { 333 dev_err(&pdev->dev, "Memory alloc fails for info\n"); 334 return -ENOMEM; 335 } 336 337 info = bcm590xx_regs; 338 339 for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) { 340 if (pmu_data) 341 reg_data = pmu_data->bcm590xx_pmu_init_data[i]; 342 else 343 reg_data = NULL; 344 345 /* Register the regulators */ 346 pmu->info[i] = info; 347 348 pmu->desc[i].name = info->name; 349 pmu->desc[i].supply_name = info->vin_name; 350 pmu->desc[i].id = i; 351 pmu->desc[i].volt_table = info->volt_table; 352 pmu->desc[i].n_voltages = info->n_voltages; 353 pmu->desc[i].linear_ranges = info->linear_ranges; 354 pmu->desc[i].n_linear_ranges = info->n_linear_ranges; 355 356 if (BCM590XX_REG_IS_LDO(i)) { 357 pmu->desc[i].ops = &bcm590xx_ops_ldo; 358 pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK; 359 } else { 360 pmu->desc[i].ops = &bcm590xx_ops_dcdc; 361 pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK; 362 } 363 364 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i); 365 pmu->desc[i].enable_is_inverted = true; 366 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE; 367 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i); 368 pmu->desc[i].type = REGULATOR_VOLTAGE; 369 pmu->desc[i].owner = THIS_MODULE; 370 371 config.dev = bcm590xx->dev; 372 config.init_data = reg_data; 373 config.driver_data = pmu; 374 config.regmap = bcm590xx->regmap; 375 376 if (bcm590xx_reg_matches) 377 config.of_node = bcm590xx_reg_matches[i].of_node; 378 379 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i], 380 &config); 381 if (IS_ERR(rdev)) { 382 dev_err(bcm590xx->dev, 383 "failed to register %s regulator\n", 384 pdev->name); 385 return PTR_ERR(rdev); 386 } 387 } 388 389 return 0; 390 } 391 392 static struct platform_driver bcm590xx_regulator_driver = { 393 .driver = { 394 .name = "bcm590xx-vregs", 395 .owner = THIS_MODULE, 396 }, 397 .probe = bcm590xx_probe, 398 }; 399 module_platform_driver(bcm590xx_regulator_driver); 400 401 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); 402 MODULE_DESCRIPTION("BCM590xx voltage regulator driver"); 403 MODULE_LICENSE("GPL v2"); 404 MODULE_ALIAS("platform:bcm590xx-vregs"); 405