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