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 /* for DVM regulators */ 67 int go_reg; 68 int go_bit; 69 }; 70 71 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) 72 { 73 return rdev_get_dev(rdev)->parent; 74 } 75 76 static int tps6586x_set_voltage_sel(struct regulator_dev *rdev, 77 unsigned selector) 78 { 79 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 80 struct device *parent = to_tps6586x_dev(rdev); 81 int ret, val, rid = rdev_get_id(rdev); 82 uint8_t mask; 83 84 val = selector << ri->volt_shift; 85 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; 86 87 ret = tps6586x_update(parent, ri->volt_reg, val, mask); 88 if (ret) 89 return ret; 90 91 /* Update go bit for DVM regulators */ 92 switch (rid) { 93 case TPS6586X_ID_LDO_2: 94 case TPS6586X_ID_LDO_4: 95 case TPS6586X_ID_SM_0: 96 case TPS6586X_ID_SM_1: 97 ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit); 98 break; 99 } 100 return ret; 101 } 102 103 static int tps6586x_get_voltage_sel(struct regulator_dev *rdev) 104 { 105 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 106 struct device *parent = to_tps6586x_dev(rdev); 107 uint8_t val, mask; 108 int ret; 109 110 ret = tps6586x_read(parent, ri->volt_reg, &val); 111 if (ret) 112 return ret; 113 114 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; 115 val = (val & mask) >> ri->volt_shift; 116 117 if (val >= ri->desc.n_voltages) 118 BUG(); 119 120 return val; 121 } 122 123 static int tps6586x_regulator_enable(struct regulator_dev *rdev) 124 { 125 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 126 struct device *parent = to_tps6586x_dev(rdev); 127 128 return tps6586x_set_bits(parent, ri->enable_reg[0], 129 1 << ri->enable_bit[0]); 130 } 131 132 static int tps6586x_regulator_disable(struct regulator_dev *rdev) 133 { 134 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 135 struct device *parent = to_tps6586x_dev(rdev); 136 137 return tps6586x_clr_bits(parent, ri->enable_reg[0], 138 1 << ri->enable_bit[0]); 139 } 140 141 static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev) 142 { 143 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 144 struct device *parent = to_tps6586x_dev(rdev); 145 uint8_t reg_val; 146 int ret; 147 148 ret = tps6586x_read(parent, ri->enable_reg[0], ®_val); 149 if (ret) 150 return ret; 151 152 return !!(reg_val & (1 << ri->enable_bit[0])); 153 } 154 155 static struct regulator_ops tps6586x_regulator_ops = { 156 .list_voltage = regulator_list_voltage_table, 157 .get_voltage_sel = tps6586x_get_voltage_sel, 158 .set_voltage_sel = tps6586x_set_voltage_sel, 159 160 .is_enabled = tps6586x_regulator_is_enabled, 161 .enable = tps6586x_regulator_enable, 162 .disable = tps6586x_regulator_disable, 163 }; 164 165 static const unsigned int tps6586x_ldo0_voltages[] = { 166 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 167 }; 168 169 static const unsigned int tps6586x_ldo4_voltages[] = { 170 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000, 171 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000, 172 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000, 173 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000, 174 }; 175 176 static const unsigned int tps6586x_ldo_voltages[] = { 177 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 178 }; 179 180 static const unsigned int tps6586x_sm2_voltages[] = { 181 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000, 182 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000, 183 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000, 184 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000, 185 }; 186 187 static const unsigned int tps6586x_dvm_voltages[] = { 188 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000, 189 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000, 190 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000, 191 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000, 192 }; 193 194 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \ 195 ereg0, ebit0, ereg1, ebit1) \ 196 .desc = { \ 197 .supply_name = _pin_name, \ 198 .name = "REG-" #_id, \ 199 .ops = &tps6586x_regulator_ops, \ 200 .type = REGULATOR_VOLTAGE, \ 201 .id = TPS6586X_ID_##_id, \ 202 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ 203 .volt_table = tps6586x_##vdata##_voltages, \ 204 .owner = THIS_MODULE, \ 205 }, \ 206 .volt_reg = TPS6586X_##vreg, \ 207 .volt_shift = (shift), \ 208 .volt_nbits = (nbits), \ 209 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ 210 .enable_bit[0] = (ebit0), \ 211 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ 212 .enable_bit[1] = (ebit1), 213 214 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ 215 .go_reg = TPS6586X_##goreg, \ 216 .go_bit = (gobit), 217 218 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \ 219 ereg0, ebit0, ereg1, ebit1) \ 220 { \ 221 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ 222 ereg0, ebit0, ereg1, ebit1) \ 223 } 224 225 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \ 226 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 227 { \ 228 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ 229 ereg0, ebit0, ereg1, ebit1) \ 230 TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ 231 } 232 233 static struct tps6586x_regulator tps6586x_regulator[] = { 234 TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0), 235 TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), 236 TPS6586X_LDO(LDO_5, NULL, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), 237 TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), 238 TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), 239 TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6), 240 TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), 241 TPS6586X_LDO(LDO_RTC, NULL, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7), 242 TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), 243 TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7), 244 245 TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3, 246 ENB, 3, VCC2, 6), 247 TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3, 248 END, 3, VCC1, 6), 249 TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1, 250 ENB, 1, VCC1, 2), 251 TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0, 252 ENB, 0, VCC1, 0), 253 }; 254 255 /* 256 * TPS6586X has 2 enable bits that are OR'ed to determine the actual 257 * regulator state. Clearing one of this bits allows switching 258 * regulator on and of with single register write. 259 */ 260 static inline int tps6586x_regulator_preinit(struct device *parent, 261 struct tps6586x_regulator *ri) 262 { 263 uint8_t val1, val2; 264 int ret; 265 266 if (ri->enable_reg[0] == ri->enable_reg[1] && 267 ri->enable_bit[0] == ri->enable_bit[1]) 268 return 0; 269 270 ret = tps6586x_read(parent, ri->enable_reg[0], &val1); 271 if (ret) 272 return ret; 273 274 ret = tps6586x_read(parent, ri->enable_reg[1], &val2); 275 if (ret) 276 return ret; 277 278 if (!(val2 & (1 << ri->enable_bit[1]))) 279 return 0; 280 281 /* 282 * The regulator is on, but it's enabled with the bit we don't 283 * want to use, so we switch the enable bits 284 */ 285 if (!(val1 & (1 << ri->enable_bit[0]))) { 286 ret = tps6586x_set_bits(parent, ri->enable_reg[0], 287 1 << ri->enable_bit[0]); 288 if (ret) 289 return ret; 290 } 291 292 return tps6586x_clr_bits(parent, ri->enable_reg[1], 293 1 << ri->enable_bit[1]); 294 } 295 296 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev) 297 { 298 struct device *parent = pdev->dev.parent; 299 struct regulator_init_data *p = pdev->dev.platform_data; 300 struct tps6586x_settings *setting = p->driver_data; 301 uint8_t reg; 302 303 if (setting == NULL) 304 return 0; 305 306 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) 307 return 0; 308 309 /* only SM0 and SM1 can have the slew rate settings */ 310 switch (pdev->id) { 311 case TPS6586X_ID_SM_0: 312 reg = TPS6586X_SM0SL; 313 break; 314 case TPS6586X_ID_SM_1: 315 reg = TPS6586X_SM1SL; 316 break; 317 default: 318 dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); 319 return -EINVAL; 320 } 321 322 return tps6586x_write(parent, reg, 323 setting->slew_rate & TPS6586X_SLEW_RATE_MASK); 324 } 325 326 static inline struct tps6586x_regulator *find_regulator_info(int id) 327 { 328 struct tps6586x_regulator *ri; 329 int i; 330 331 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { 332 ri = &tps6586x_regulator[i]; 333 if (ri->desc.id == id) 334 return ri; 335 } 336 return NULL; 337 } 338 339 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) 340 { 341 struct tps6586x_regulator *ri = NULL; 342 struct regulator_config config = { }; 343 struct regulator_dev *rdev; 344 int id = pdev->id; 345 int err; 346 347 dev_dbg(&pdev->dev, "Probing regulator %d\n", id); 348 349 ri = find_regulator_info(id); 350 if (ri == NULL) { 351 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 352 return -EINVAL; 353 } 354 355 err = tps6586x_regulator_preinit(pdev->dev.parent, ri); 356 if (err) 357 return err; 358 359 config.dev = pdev->dev.parent; 360 config.of_node = pdev->dev.of_node; 361 config.init_data = pdev->dev.platform_data; 362 config.driver_data = ri; 363 364 rdev = regulator_register(&ri->desc, &config); 365 if (IS_ERR(rdev)) { 366 dev_err(&pdev->dev, "failed to register regulator %s\n", 367 ri->desc.name); 368 return PTR_ERR(rdev); 369 } 370 371 platform_set_drvdata(pdev, rdev); 372 373 return tps6586x_regulator_set_slew_rate(pdev); 374 } 375 376 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev) 377 { 378 struct regulator_dev *rdev = platform_get_drvdata(pdev); 379 380 regulator_unregister(rdev); 381 return 0; 382 } 383 384 static struct platform_driver tps6586x_regulator_driver = { 385 .driver = { 386 .name = "tps6586x-regulator", 387 .owner = THIS_MODULE, 388 }, 389 .probe = tps6586x_regulator_probe, 390 .remove = __devexit_p(tps6586x_regulator_remove), 391 }; 392 393 static int __init tps6586x_regulator_init(void) 394 { 395 return platform_driver_register(&tps6586x_regulator_driver); 396 } 397 subsys_initcall(tps6586x_regulator_init); 398 399 static void __exit tps6586x_regulator_exit(void) 400 { 401 platform_driver_unregister(&tps6586x_regulator_driver); 402 } 403 module_exit(tps6586x_regulator_exit); 404 405 MODULE_LICENSE("GPL"); 406 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); 407 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); 408 MODULE_ALIAS("platform:tps6586x-regulator"); 409