1 /* 2 * Regulator driver for TI TPS6586x 3 * 4 * Copyright (C) 2010 Compulab Ltd. 5 * Author: Mike Rapoport <mike@compulab.co.il> 6 * 7 * Based on da903x 8 * Copyright (C) 2006-2008 Marvell International Ltd. 9 * Copyright (C) 2008 Compulab Ltd. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/err.h> 20 #include <linux/slab.h> 21 #include <linux/platform_device.h> 22 #include <linux/regulator/driver.h> 23 #include <linux/regulator/machine.h> 24 #include <linux/mfd/tps6586x.h> 25 26 /* supply control and voltage setting */ 27 #define TPS6586X_SUPPLYENA 0x10 28 #define TPS6586X_SUPPLYENB 0x11 29 #define TPS6586X_SUPPLYENC 0x12 30 #define TPS6586X_SUPPLYEND 0x13 31 #define TPS6586X_SUPPLYENE 0x14 32 #define TPS6586X_VCC1 0x20 33 #define TPS6586X_VCC2 0x21 34 #define TPS6586X_SM1V1 0x23 35 #define TPS6586X_SM1V2 0x24 36 #define TPS6586X_SM1SL 0x25 37 #define TPS6586X_SM0V1 0x26 38 #define TPS6586X_SM0V2 0x27 39 #define TPS6586X_SM0SL 0x28 40 #define TPS6586X_LDO2AV1 0x29 41 #define TPS6586X_LDO2AV2 0x2A 42 #define TPS6586X_LDO2BV1 0x2F 43 #define TPS6586X_LDO2BV2 0x30 44 #define TPS6586X_LDO4V1 0x32 45 #define TPS6586X_LDO4V2 0x33 46 47 /* converter settings */ 48 #define TPS6586X_SUPPLYV1 0x41 49 #define TPS6586X_SUPPLYV2 0x42 50 #define TPS6586X_SUPPLYV3 0x43 51 #define TPS6586X_SUPPLYV4 0x44 52 #define TPS6586X_SUPPLYV5 0x45 53 #define TPS6586X_SUPPLYV6 0x46 54 #define TPS6586X_SMODE1 0x47 55 #define TPS6586X_SMODE2 0x48 56 57 struct tps6586x_regulator { 58 struct regulator_desc desc; 59 60 int volt_reg; 61 int volt_shift; 62 int volt_nbits; 63 int enable_bit[2]; 64 int enable_reg[2]; 65 66 int *voltages; 67 68 /* for DVM regulators */ 69 int go_reg; 70 int go_bit; 71 }; 72 73 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) 74 { 75 return rdev_get_dev(rdev)->parent->parent; 76 } 77 78 static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev, 79 unsigned selector) 80 { 81 struct tps6586x_regulator *info = rdev_get_drvdata(rdev); 82 int rid = rdev_get_id(rdev); 83 84 /* LDO0 has minimal voltage 1.2V rather than 1.25V */ 85 if ((rid == TPS6586X_ID_LDO_0) && (selector == 0)) 86 return (info->voltages[0] - 50) * 1000; 87 88 return info->voltages[selector] * 1000; 89 } 90 91 92 static int __tps6586x_ldo_set_voltage(struct device *parent, 93 struct tps6586x_regulator *ri, 94 int min_uV, int max_uV, 95 unsigned *selector) 96 { 97 int val, uV; 98 uint8_t mask; 99 100 for (val = 0; val < ri->desc.n_voltages; val++) { 101 uV = ri->voltages[val] * 1000; 102 103 /* LDO0 has minimal voltage 1.2 rather than 1.25 */ 104 if (ri->desc.id == TPS6586X_ID_LDO_0 && val == 0) 105 uV -= 50 * 1000; 106 107 /* use the first in-range value */ 108 if (min_uV <= uV && uV <= max_uV) { 109 110 *selector = val; 111 112 val <<= ri->volt_shift; 113 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; 114 115 return tps6586x_update(parent, ri->volt_reg, val, mask); 116 } 117 } 118 119 return -EINVAL; 120 } 121 122 static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev, 123 int min_uV, int max_uV, unsigned *selector) 124 { 125 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 126 struct device *parent = to_tps6586x_dev(rdev); 127 128 return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV, 129 selector); 130 } 131 132 static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev) 133 { 134 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 135 struct device *parent = to_tps6586x_dev(rdev); 136 uint8_t val, mask; 137 int ret; 138 139 ret = tps6586x_read(parent, ri->volt_reg, &val); 140 if (ret) 141 return ret; 142 143 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; 144 val = (val & mask) >> ri->volt_shift; 145 146 if (val >= ri->desc.n_voltages) 147 BUG(); 148 149 return ri->voltages[val] * 1000; 150 } 151 152 static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev, 153 int min_uV, int max_uV, unsigned *selector) 154 { 155 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 156 struct device *parent = to_tps6586x_dev(rdev); 157 int ret; 158 159 ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV, 160 selector); 161 if (ret) 162 return ret; 163 164 return tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit); 165 } 166 167 static int tps6586x_regulator_enable(struct regulator_dev *rdev) 168 { 169 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 170 struct device *parent = to_tps6586x_dev(rdev); 171 172 return tps6586x_set_bits(parent, ri->enable_reg[0], 173 1 << ri->enable_bit[0]); 174 } 175 176 static int tps6586x_regulator_disable(struct regulator_dev *rdev) 177 { 178 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 179 struct device *parent = to_tps6586x_dev(rdev); 180 181 return tps6586x_clr_bits(parent, ri->enable_reg[0], 182 1 << ri->enable_bit[0]); 183 } 184 185 static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev) 186 { 187 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 188 struct device *parent = to_tps6586x_dev(rdev); 189 uint8_t reg_val; 190 int ret; 191 192 ret = tps6586x_read(parent, ri->enable_reg[0], ®_val); 193 if (ret) 194 return ret; 195 196 return !!(reg_val & (1 << ri->enable_bit[0])); 197 } 198 199 static struct regulator_ops tps6586x_regulator_ldo_ops = { 200 .list_voltage = tps6586x_ldo_list_voltage, 201 .get_voltage = tps6586x_ldo_get_voltage, 202 .set_voltage = tps6586x_ldo_set_voltage, 203 204 .is_enabled = tps6586x_regulator_is_enabled, 205 .enable = tps6586x_regulator_enable, 206 .disable = tps6586x_regulator_disable, 207 }; 208 209 static struct regulator_ops tps6586x_regulator_dvm_ops = { 210 .list_voltage = tps6586x_ldo_list_voltage, 211 .get_voltage = tps6586x_ldo_get_voltage, 212 .set_voltage = tps6586x_dvm_set_voltage, 213 214 .is_enabled = tps6586x_regulator_is_enabled, 215 .enable = tps6586x_regulator_enable, 216 .disable = tps6586x_regulator_disable, 217 }; 218 219 static int tps6586x_ldo_voltages[] = { 220 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300, 221 }; 222 223 static int tps6586x_ldo4_voltages[] = { 224 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875, 225 1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075, 226 2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275, 227 2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475, 228 }; 229 230 static int tps6586x_sm2_voltages[] = { 231 3000, 3050, 3100, 3150, 3200, 3250, 3300, 3350, 232 3400, 3450, 3500, 3550, 3600, 3650, 3700, 3750, 233 3800, 3850, 3900, 3950, 4000, 4050, 4100, 4150, 234 4200, 4250, 4300, 4350, 4400, 4450, 4500, 4550, 235 }; 236 237 static int tps6586x_dvm_voltages[] = { 238 725, 750, 775, 800, 825, 850, 875, 900, 239 925, 950, 975, 1000, 1025, 1050, 1075, 1100, 240 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300, 241 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500, 242 }; 243 244 #define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits, \ 245 ereg0, ebit0, ereg1, ebit1) \ 246 .desc = { \ 247 .name = "REG-" #_id, \ 248 .ops = &tps6586x_regulator_##_ops, \ 249 .type = REGULATOR_VOLTAGE, \ 250 .id = TPS6586X_ID_##_id, \ 251 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ 252 .owner = THIS_MODULE, \ 253 }, \ 254 .volt_reg = TPS6586X_##vreg, \ 255 .volt_shift = (shift), \ 256 .volt_nbits = (nbits), \ 257 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ 258 .enable_bit[0] = (ebit0), \ 259 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ 260 .enable_bit[1] = (ebit1), \ 261 .voltages = tps6586x_##vdata##_voltages, 262 263 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ 264 .go_reg = TPS6586X_##goreg, \ 265 .go_bit = (gobit), 266 267 #define TPS6586X_LDO(_id, vdata, vreg, shift, nbits, \ 268 ereg0, ebit0, ereg1, ebit1) \ 269 { \ 270 TPS6586X_REGULATOR(_id, vdata, ldo_ops, vreg, shift, nbits, \ 271 ereg0, ebit0, ereg1, ebit1) \ 272 } 273 274 #define TPS6586X_DVM(_id, vdata, vreg, shift, nbits, \ 275 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 276 { \ 277 TPS6586X_REGULATOR(_id, vdata, dvm_ops, vreg, shift, nbits, \ 278 ereg0, ebit0, ereg1, ebit1) \ 279 TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ 280 } 281 282 static struct tps6586x_regulator tps6586x_regulator[] = { 283 TPS6586X_LDO(LDO_0, ldo, SUPPLYV1, 5, 3, ENC, 0, END, 0), 284 TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), 285 TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), 286 TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), 287 TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), 288 TPS6586X_LDO(LDO_8, ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6), 289 TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), 290 TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7), 291 TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), 292 TPS6586X_LDO(SM_2, sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7), 293 294 TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6), 295 TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6), 296 TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2), 297 TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0), 298 }; 299 300 /* 301 * TPS6586X has 2 enable bits that are OR'ed to determine the actual 302 * regulator state. Clearing one of this bits allows switching 303 * regulator on and of with single register write. 304 */ 305 static inline int tps6586x_regulator_preinit(struct device *parent, 306 struct tps6586x_regulator *ri) 307 { 308 uint8_t val1, val2; 309 int ret; 310 311 if (ri->enable_reg[0] == ri->enable_reg[1] && 312 ri->enable_bit[0] == ri->enable_bit[1]) 313 return 0; 314 315 ret = tps6586x_read(parent, ri->enable_reg[0], &val1); 316 if (ret) 317 return ret; 318 319 ret = tps6586x_read(parent, ri->enable_reg[1], &val2); 320 if (ret) 321 return ret; 322 323 if (!(val2 & (1 << ri->enable_bit[1]))) 324 return 0; 325 326 /* 327 * The regulator is on, but it's enabled with the bit we don't 328 * want to use, so we switch the enable bits 329 */ 330 if (!(val1 & (1 << ri->enable_bit[0]))) { 331 ret = tps6586x_set_bits(parent, ri->enable_reg[0], 332 1 << ri->enable_bit[0]); 333 if (ret) 334 return ret; 335 } 336 337 return tps6586x_clr_bits(parent, ri->enable_reg[1], 338 1 << ri->enable_bit[1]); 339 } 340 341 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev) 342 { 343 struct device *parent = pdev->dev.parent; 344 struct regulator_init_data *p = pdev->dev.platform_data; 345 struct tps6586x_settings *setting = p->driver_data; 346 uint8_t reg; 347 348 if (setting == NULL) 349 return 0; 350 351 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) 352 return 0; 353 354 /* only SM0 and SM1 can have the slew rate settings */ 355 switch (pdev->id) { 356 case TPS6586X_ID_SM_0: 357 reg = TPS6586X_SM0SL; 358 break; 359 case TPS6586X_ID_SM_1: 360 reg = TPS6586X_SM1SL; 361 break; 362 default: 363 dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); 364 return -EINVAL; 365 } 366 367 return tps6586x_write(parent, reg, 368 setting->slew_rate & TPS6586X_SLEW_RATE_MASK); 369 } 370 371 static inline struct tps6586x_regulator *find_regulator_info(int id) 372 { 373 struct tps6586x_regulator *ri; 374 int i; 375 376 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { 377 ri = &tps6586x_regulator[i]; 378 if (ri->desc.id == id) 379 return ri; 380 } 381 return NULL; 382 } 383 384 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) 385 { 386 struct tps6586x_regulator *ri = NULL; 387 struct regulator_dev *rdev; 388 int id = pdev->id; 389 int err; 390 391 dev_dbg(&pdev->dev, "Probing regulator %d\n", id); 392 393 ri = find_regulator_info(id); 394 if (ri == NULL) { 395 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 396 return -EINVAL; 397 } 398 399 err = tps6586x_regulator_preinit(pdev->dev.parent, ri); 400 if (err) 401 return err; 402 403 rdev = regulator_register(&ri->desc, &pdev->dev, 404 pdev->dev.platform_data, ri, NULL); 405 if (IS_ERR(rdev)) { 406 dev_err(&pdev->dev, "failed to register regulator %s\n", 407 ri->desc.name); 408 return PTR_ERR(rdev); 409 } 410 411 platform_set_drvdata(pdev, rdev); 412 413 return tps6586x_regulator_set_slew_rate(pdev); 414 } 415 416 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev) 417 { 418 struct regulator_dev *rdev = platform_get_drvdata(pdev); 419 420 regulator_unregister(rdev); 421 return 0; 422 } 423 424 static struct platform_driver tps6586x_regulator_driver = { 425 .driver = { 426 .name = "tps6586x-regulator", 427 .owner = THIS_MODULE, 428 }, 429 .probe = tps6586x_regulator_probe, 430 .remove = __devexit_p(tps6586x_regulator_remove), 431 }; 432 433 static int __init tps6586x_regulator_init(void) 434 { 435 return platform_driver_register(&tps6586x_regulator_driver); 436 } 437 subsys_initcall(tps6586x_regulator_init); 438 439 static void __exit tps6586x_regulator_exit(void) 440 { 441 platform_driver_unregister(&tps6586x_regulator_driver); 442 } 443 module_exit(tps6586x_regulator_exit); 444 445 MODULE_LICENSE("GPL"); 446 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); 447 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); 448 MODULE_ALIAS("platform:tps6586x-regulator"); 449