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