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 enable_bit[2]; 61 int enable_reg[2]; 62 63 /* for DVM regulators */ 64 int go_reg; 65 int go_bit; 66 }; 67 68 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) 69 { 70 return rdev_get_dev(rdev)->parent; 71 } 72 73 static int tps6586x_set_voltage_sel(struct regulator_dev *rdev, 74 unsigned selector) 75 { 76 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); 77 struct device *parent = to_tps6586x_dev(rdev); 78 int ret, val, rid = rdev_get_id(rdev); 79 uint8_t mask; 80 81 val = selector << (ffs(rdev->desc->vsel_mask) - 1); 82 mask = rdev->desc->vsel_mask; 83 84 ret = tps6586x_update(parent, rdev->desc->vsel_reg, val, mask); 85 if (ret) 86 return ret; 87 88 /* Update go bit for DVM regulators */ 89 switch (rid) { 90 case TPS6586X_ID_LDO_2: 91 case TPS6586X_ID_LDO_4: 92 case TPS6586X_ID_SM_0: 93 case TPS6586X_ID_SM_1: 94 ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit); 95 break; 96 } 97 return ret; 98 } 99 100 static struct regulator_ops tps6586x_regulator_ops = { 101 .list_voltage = regulator_list_voltage_table, 102 .get_voltage_sel = regulator_get_voltage_sel_regmap, 103 .set_voltage_sel = tps6586x_set_voltage_sel, 104 105 .is_enabled = regulator_is_enabled_regmap, 106 .enable = regulator_enable_regmap, 107 .disable = regulator_disable_regmap, 108 }; 109 110 static struct regulator_ops tps6586x_sys_regulator_ops = { 111 }; 112 113 static const unsigned int tps6586x_ldo0_voltages[] = { 114 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 115 }; 116 117 static const unsigned int tps6586x_ldo4_voltages[] = { 118 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000, 119 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000, 120 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000, 121 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000, 122 }; 123 124 static const unsigned int tps6586x_ldo_voltages[] = { 125 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 126 }; 127 128 static const unsigned int tps6586x_sm2_voltages[] = { 129 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000, 130 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000, 131 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000, 132 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000, 133 }; 134 135 static const unsigned int tps6586x_dvm_voltages[] = { 136 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000, 137 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000, 138 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000, 139 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000, 140 }; 141 142 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \ 143 ereg0, ebit0, ereg1, ebit1) \ 144 .desc = { \ 145 .supply_name = _pin_name, \ 146 .name = "REG-" #_id, \ 147 .ops = &tps6586x_regulator_ops, \ 148 .type = REGULATOR_VOLTAGE, \ 149 .id = TPS6586X_ID_##_id, \ 150 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ 151 .volt_table = tps6586x_##vdata##_voltages, \ 152 .owner = THIS_MODULE, \ 153 .enable_reg = TPS6586X_SUPPLY##ereg0, \ 154 .enable_mask = 1 << (ebit0), \ 155 .vsel_reg = TPS6586X_##vreg, \ 156 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \ 157 }, \ 158 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ 159 .enable_bit[0] = (ebit0), \ 160 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ 161 .enable_bit[1] = (ebit1), 162 163 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ 164 .go_reg = TPS6586X_##goreg, \ 165 .go_bit = (gobit), 166 167 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \ 168 ereg0, ebit0, ereg1, ebit1) \ 169 { \ 170 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ 171 ereg0, ebit0, ereg1, ebit1) \ 172 } 173 174 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \ 175 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 176 { \ 177 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ 178 ereg0, ebit0, ereg1, ebit1) \ 179 TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ 180 } 181 182 #define TPS6586X_SYS_REGULATOR() \ 183 { \ 184 .desc = { \ 185 .supply_name = "sys", \ 186 .name = "REG-SYS", \ 187 .ops = &tps6586x_sys_regulator_ops, \ 188 .type = REGULATOR_VOLTAGE, \ 189 .id = TPS6586X_ID_SYS, \ 190 .owner = THIS_MODULE, \ 191 }, \ 192 } 193 194 static struct tps6586x_regulator tps6586x_regulator[] = { 195 TPS6586X_SYS_REGULATOR(), 196 TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0), 197 TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), 198 TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), 199 TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), 200 TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), 201 TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6), 202 TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), 203 TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7), 204 TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), 205 TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7), 206 207 TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3, 208 ENB, 3, VCC2, 6), 209 TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3, 210 END, 3, VCC1, 6), 211 TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1, 212 ENB, 1, VCC1, 2), 213 TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0, 214 ENB, 0, VCC1, 0), 215 }; 216 217 /* 218 * TPS6586X has 2 enable bits that are OR'ed to determine the actual 219 * regulator state. Clearing one of this bits allows switching 220 * regulator on and of with single register write. 221 */ 222 static inline int tps6586x_regulator_preinit(struct device *parent, 223 struct tps6586x_regulator *ri) 224 { 225 uint8_t val1, val2; 226 int ret; 227 228 if (ri->enable_reg[0] == ri->enable_reg[1] && 229 ri->enable_bit[0] == ri->enable_bit[1]) 230 return 0; 231 232 ret = tps6586x_read(parent, ri->enable_reg[0], &val1); 233 if (ret) 234 return ret; 235 236 ret = tps6586x_read(parent, ri->enable_reg[1], &val2); 237 if (ret) 238 return ret; 239 240 if (!(val2 & (1 << ri->enable_bit[1]))) 241 return 0; 242 243 /* 244 * The regulator is on, but it's enabled with the bit we don't 245 * want to use, so we switch the enable bits 246 */ 247 if (!(val1 & (1 << ri->enable_bit[0]))) { 248 ret = tps6586x_set_bits(parent, ri->enable_reg[0], 249 1 << ri->enable_bit[0]); 250 if (ret) 251 return ret; 252 } 253 254 return tps6586x_clr_bits(parent, ri->enable_reg[1], 255 1 << ri->enable_bit[1]); 256 } 257 258 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev) 259 { 260 struct device *parent = pdev->dev.parent; 261 struct regulator_init_data *p = pdev->dev.platform_data; 262 struct tps6586x_settings *setting = p->driver_data; 263 uint8_t reg; 264 265 if (setting == NULL) 266 return 0; 267 268 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) 269 return 0; 270 271 /* only SM0 and SM1 can have the slew rate settings */ 272 switch (pdev->id) { 273 case TPS6586X_ID_SM_0: 274 reg = TPS6586X_SM0SL; 275 break; 276 case TPS6586X_ID_SM_1: 277 reg = TPS6586X_SM1SL; 278 break; 279 default: 280 dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); 281 return -EINVAL; 282 } 283 284 return tps6586x_write(parent, reg, 285 setting->slew_rate & TPS6586X_SLEW_RATE_MASK); 286 } 287 288 static inline struct tps6586x_regulator *find_regulator_info(int id) 289 { 290 struct tps6586x_regulator *ri; 291 int i; 292 293 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { 294 ri = &tps6586x_regulator[i]; 295 if (ri->desc.id == id) 296 return ri; 297 } 298 return NULL; 299 } 300 301 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) 302 { 303 struct tps6586x_regulator *ri = NULL; 304 struct regulator_config config = { }; 305 struct regulator_dev *rdev; 306 int id = pdev->id; 307 int err; 308 309 dev_dbg(&pdev->dev, "Probing regulator %d\n", id); 310 311 ri = find_regulator_info(id); 312 if (ri == NULL) { 313 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 314 return -EINVAL; 315 } 316 317 err = tps6586x_regulator_preinit(pdev->dev.parent, ri); 318 if (err) 319 return err; 320 321 config.dev = pdev->dev.parent; 322 config.of_node = pdev->dev.of_node; 323 config.init_data = pdev->dev.platform_data; 324 config.driver_data = ri; 325 326 rdev = regulator_register(&ri->desc, &config); 327 if (IS_ERR(rdev)) { 328 dev_err(&pdev->dev, "failed to register regulator %s\n", 329 ri->desc.name); 330 return PTR_ERR(rdev); 331 } 332 333 platform_set_drvdata(pdev, rdev); 334 335 return tps6586x_regulator_set_slew_rate(pdev); 336 } 337 338 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev) 339 { 340 struct regulator_dev *rdev = platform_get_drvdata(pdev); 341 342 regulator_unregister(rdev); 343 return 0; 344 } 345 346 static struct platform_driver tps6586x_regulator_driver = { 347 .driver = { 348 .name = "tps6586x-regulator", 349 .owner = THIS_MODULE, 350 }, 351 .probe = tps6586x_regulator_probe, 352 .remove = __devexit_p(tps6586x_regulator_remove), 353 }; 354 355 static int __init tps6586x_regulator_init(void) 356 { 357 return platform_driver_register(&tps6586x_regulator_driver); 358 } 359 subsys_initcall(tps6586x_regulator_init); 360 361 static void __exit tps6586x_regulator_exit(void) 362 { 363 platform_driver_unregister(&tps6586x_regulator_driver); 364 } 365 module_exit(tps6586x_regulator_exit); 366 367 MODULE_LICENSE("GPL"); 368 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); 369 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); 370 MODULE_ALIAS("platform:tps6586x-regulator"); 371