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