1 /* 2 * Regulators driver for Marvell 88PM8607 3 * 4 * Copyright (C) 2009 Marvell International Ltd. 5 * Haojian Zhuang <haojian.zhuang@marvell.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #include <linux/kernel.h> 12 #include <linux/init.h> 13 #include <linux/err.h> 14 #include <linux/i2c.h> 15 #include <linux/platform_device.h> 16 #include <linux/regulator/driver.h> 17 #include <linux/regulator/machine.h> 18 #include <linux/mfd/88pm860x.h> 19 20 struct pm8607_regulator_info { 21 struct regulator_desc desc; 22 struct pm860x_chip *chip; 23 struct regulator_dev *regulator; 24 struct i2c_client *i2c; 25 26 unsigned int *vol_table; 27 unsigned int *vol_suspend; 28 29 int vol_reg; 30 int vol_shift; 31 int vol_nbits; 32 int update_reg; 33 int update_bit; 34 int enable_reg; 35 int enable_bit; 36 int slope_double; 37 }; 38 39 static const unsigned int BUCK1_table[] = { 40 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000, 41 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000, 42 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000, 43 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000, 44 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000, 45 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000, 46 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000, 47 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000, 48 }; 49 50 static const unsigned int BUCK1_suspend_table[] = { 51 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000, 52 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000, 53 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000, 54 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000, 55 800000, 825000, 850000, 875000, 900000, 925000, 950000, 975000, 56 1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 57 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000, 58 1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000, 59 }; 60 61 static const unsigned int BUCK2_table[] = { 62 0, 50000, 100000, 150000, 200000, 250000, 300000, 350000, 63 400000, 450000, 500000, 550000, 600000, 650000, 700000, 750000, 64 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 65 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, 66 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000, 67 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000, 68 2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000, 69 2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000, 70 }; 71 72 static const unsigned int BUCK2_suspend_table[] = { 73 0, 50000, 100000, 150000, 200000, 250000, 300000, 350000, 74 400000, 450000, 500000, 550000, 600000, 650000, 700000, 750000, 75 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 76 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, 77 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000, 78 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000, 79 2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000, 80 2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000, 81 }; 82 83 static const unsigned int BUCK3_table[] = { 84 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000, 85 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000, 86 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000, 87 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000, 88 800000, 825000, 850000, 875000, 900000, 925000, 950000, 975000, 89 1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 90 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000, 91 1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000, 92 }; 93 94 static const unsigned int BUCK3_suspend_table[] = { 95 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000, 96 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000, 97 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000, 98 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000, 99 800000, 825000, 850000, 875000, 900000, 925000, 950000, 975000, 100 1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 101 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000, 102 1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000, 103 }; 104 105 static const unsigned int LDO1_table[] = { 106 1800000, 1200000, 2800000, 0, 107 }; 108 109 static const unsigned int LDO1_suspend_table[] = { 110 1800000, 1200000, 0, 0, 111 }; 112 113 static const unsigned int LDO2_table[] = { 114 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000, 115 }; 116 117 static const unsigned int LDO2_suspend_table[] = { 118 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 119 }; 120 121 static const unsigned int LDO3_table[] = { 122 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000, 123 }; 124 125 static const unsigned int LDO3_suspend_table[] = { 126 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 127 }; 128 129 static const unsigned int LDO4_table[] = { 130 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000, 131 }; 132 133 static const unsigned int LDO4_suspend_table[] = { 134 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000, 135 }; 136 137 static const unsigned int LDO5_table[] = { 138 2900000, 3000000, 3100000, 3300000, 139 }; 140 141 static const unsigned int LDO5_suspend_table[] = { 142 2900000, 0, 0, 0, 143 }; 144 145 static const unsigned int LDO6_table[] = { 146 1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000, 147 }; 148 149 static const unsigned int LDO6_suspend_table[] = { 150 1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000, 151 }; 152 153 static const unsigned int LDO7_table[] = { 154 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 155 }; 156 157 static const unsigned int LDO7_suspend_table[] = { 158 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 159 }; 160 161 static const unsigned int LDO8_table[] = { 162 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 163 }; 164 165 static const unsigned int LDO8_suspend_table[] = { 166 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 167 }; 168 169 static const unsigned int LDO9_table[] = { 170 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000, 171 }; 172 173 static const unsigned int LDO9_suspend_table[] = { 174 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 175 }; 176 177 static const unsigned int LDO10_table[] = { 178 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000, 179 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 180 }; 181 182 static const unsigned int LDO10_suspend_table[] = { 183 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000, 184 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 185 }; 186 187 static const unsigned int LDO12_table[] = { 188 1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000, 189 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 190 }; 191 192 static const unsigned int LDO12_suspend_table[] = { 193 1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000, 194 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 195 }; 196 197 static const unsigned int LDO13_table[] = { 198 1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0, 0, 199 }; 200 201 static const unsigned int LDO13_suspend_table[] = { 202 0, 203 }; 204 205 static const unsigned int LDO14_table[] = { 206 1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000, 207 }; 208 209 static const unsigned int LDO14_suspend_table[] = { 210 1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000, 211 }; 212 213 static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index) 214 { 215 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); 216 int ret = -EINVAL; 217 218 if (info->vol_table && (index < (2 << info->vol_nbits))) { 219 ret = info->vol_table[index]; 220 if (info->slope_double) 221 ret <<= 1; 222 } 223 return ret; 224 } 225 226 static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) 227 { 228 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); 229 int i, ret = -ENOENT; 230 231 if (info->slope_double) { 232 min_uV = min_uV >> 1; 233 max_uV = max_uV >> 1; 234 } 235 if (info->vol_table) { 236 for (i = 0; i < (2 << info->vol_nbits); i++) { 237 if (!info->vol_table[i]) 238 break; 239 if ((min_uV <= info->vol_table[i]) 240 && (max_uV >= info->vol_table[i])) { 241 ret = i; 242 break; 243 } 244 } 245 } 246 if (ret < 0) 247 pr_err("invalid voltage range (%d %d) uV\n", min_uV, max_uV); 248 return ret; 249 } 250 251 static int pm8607_set_voltage(struct regulator_dev *rdev, 252 int min_uV, int max_uV) 253 { 254 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); 255 uint8_t val, mask; 256 int ret; 257 258 if (min_uV > max_uV) { 259 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV); 260 return -EINVAL; 261 } 262 263 ret = choose_voltage(rdev, min_uV, max_uV); 264 if (ret < 0) 265 return -EINVAL; 266 val = (uint8_t)(ret << info->vol_shift); 267 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; 268 269 ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, val); 270 if (ret) 271 return ret; 272 switch (info->desc.id) { 273 case PM8607_ID_BUCK1: 274 case PM8607_ID_BUCK3: 275 ret = pm860x_set_bits(info->i2c, info->update_reg, 276 1 << info->update_bit, 277 1 << info->update_bit); 278 break; 279 } 280 return ret; 281 } 282 283 static int pm8607_get_voltage(struct regulator_dev *rdev) 284 { 285 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); 286 uint8_t val, mask; 287 int ret; 288 289 ret = pm860x_reg_read(info->i2c, info->vol_reg); 290 if (ret < 0) 291 return ret; 292 293 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; 294 val = ((unsigned char)ret & mask) >> info->vol_shift; 295 296 return pm8607_list_voltage(rdev, val); 297 } 298 299 static int pm8607_enable(struct regulator_dev *rdev) 300 { 301 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); 302 303 return pm860x_set_bits(info->i2c, info->enable_reg, 304 1 << info->enable_bit, 305 1 << info->enable_bit); 306 } 307 308 static int pm8607_disable(struct regulator_dev *rdev) 309 { 310 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); 311 312 return pm860x_set_bits(info->i2c, info->enable_reg, 313 1 << info->enable_bit, 0); 314 } 315 316 static int pm8607_is_enabled(struct regulator_dev *rdev) 317 { 318 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); 319 int ret; 320 321 ret = pm860x_reg_read(info->i2c, info->enable_reg); 322 if (ret < 0) 323 return ret; 324 325 return !!((unsigned char)ret & (1 << info->enable_bit)); 326 } 327 328 static struct regulator_ops pm8607_regulator_ops = { 329 .set_voltage = pm8607_set_voltage, 330 .get_voltage = pm8607_get_voltage, 331 .enable = pm8607_enable, 332 .disable = pm8607_disable, 333 .is_enabled = pm8607_is_enabled, 334 }; 335 336 #define PM8607_DVC(vreg, nbits, ureg, ubit, ereg, ebit) \ 337 { \ 338 .desc = { \ 339 .name = #vreg, \ 340 .ops = &pm8607_regulator_ops, \ 341 .type = REGULATOR_VOLTAGE, \ 342 .id = PM8607_ID_##vreg, \ 343 .owner = THIS_MODULE, \ 344 }, \ 345 .vol_reg = PM8607_##vreg, \ 346 .vol_shift = (0), \ 347 .vol_nbits = (nbits), \ 348 .update_reg = PM8607_##ureg, \ 349 .update_bit = (ubit), \ 350 .enable_reg = PM8607_##ereg, \ 351 .enable_bit = (ebit), \ 352 .slope_double = (0), \ 353 .vol_table = (unsigned int *)&vreg##_table, \ 354 .vol_suspend = (unsigned int *)&vreg##_suspend_table, \ 355 } 356 357 #define PM8607_LDO(_id, vreg, shift, nbits, ereg, ebit) \ 358 { \ 359 .desc = { \ 360 .name = "LDO" #_id, \ 361 .ops = &pm8607_regulator_ops, \ 362 .type = REGULATOR_VOLTAGE, \ 363 .id = PM8607_ID_LDO##_id, \ 364 .owner = THIS_MODULE, \ 365 }, \ 366 .vol_reg = PM8607_##vreg, \ 367 .vol_shift = (shift), \ 368 .vol_nbits = (nbits), \ 369 .enable_reg = PM8607_##ereg, \ 370 .enable_bit = (ebit), \ 371 .slope_double = (0), \ 372 .vol_table = (unsigned int *)&LDO##_id##_table, \ 373 .vol_suspend = (unsigned int *)&LDO##_id##_suspend_table, \ 374 } 375 376 static struct pm8607_regulator_info pm8607_regulator_info[] = { 377 PM8607_DVC(BUCK1, 6, GO, 0, SUPPLIES_EN11, 0), 378 PM8607_DVC(BUCK2, 6, GO, 1, SUPPLIES_EN11, 1), 379 PM8607_DVC(BUCK3, 6, GO, 2, SUPPLIES_EN11, 2), 380 381 PM8607_LDO( 1, LDO1, 0, 2, SUPPLIES_EN11, 3), 382 PM8607_LDO( 2, LDO2, 0, 3, SUPPLIES_EN11, 4), 383 PM8607_LDO( 3, LDO3, 0, 3, SUPPLIES_EN11, 5), 384 PM8607_LDO( 4, LDO4, 0, 3, SUPPLIES_EN11, 6), 385 PM8607_LDO( 5, LDO5, 0, 2, SUPPLIES_EN11, 7), 386 PM8607_LDO( 6, LDO6, 0, 3, SUPPLIES_EN12, 0), 387 PM8607_LDO( 7, LDO7, 0, 3, SUPPLIES_EN12, 1), 388 PM8607_LDO( 8, LDO8, 0, 3, SUPPLIES_EN12, 2), 389 PM8607_LDO( 9, LDO9, 0, 3, SUPPLIES_EN12, 3), 390 PM8607_LDO(10, LDO10, 0, 3, SUPPLIES_EN12, 4), 391 PM8607_LDO(12, LDO12, 0, 4, SUPPLIES_EN12, 5), 392 PM8607_LDO(13, VIBRATOR_SET, 1, 3, VIBRATOR_SET, 0), 393 PM8607_LDO(14, LDO14, 0, 4, SUPPLIES_EN12, 6), 394 }; 395 396 static inline struct pm8607_regulator_info *find_regulator_info(int id) 397 { 398 struct pm8607_regulator_info *info; 399 int i; 400 401 for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) { 402 info = &pm8607_regulator_info[i]; 403 if (info->desc.id == id) 404 return info; 405 } 406 return NULL; 407 } 408 409 static int __devinit pm8607_regulator_probe(struct platform_device *pdev) 410 { 411 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); 412 struct pm860x_platform_data *pdata = chip->dev->platform_data; 413 struct pm8607_regulator_info *info = NULL; 414 415 info = find_regulator_info(pdev->id); 416 if (info == NULL) { 417 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 418 return -EINVAL; 419 } 420 421 info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion; 422 info->chip = chip; 423 424 info->regulator = regulator_register(&info->desc, &pdev->dev, 425 pdata->regulator[pdev->id], info); 426 if (IS_ERR(info->regulator)) { 427 dev_err(&pdev->dev, "failed to register regulator %s\n", 428 info->desc.name); 429 return PTR_ERR(info->regulator); 430 } 431 432 /* check DVC ramp slope double */ 433 if (info->desc.id == PM8607_ID_BUCK3) 434 if (info->chip->buck3_double) 435 info->slope_double = 1; 436 437 platform_set_drvdata(pdev, info); 438 return 0; 439 } 440 441 static int __devexit pm8607_regulator_remove(struct platform_device *pdev) 442 { 443 struct pm8607_regulator_info *info = platform_get_drvdata(pdev); 444 445 platform_set_drvdata(pdev, NULL); 446 regulator_unregister(info->regulator); 447 return 0; 448 } 449 450 static struct platform_driver pm8607_regulator_driver = { 451 .driver = { 452 .name = "88pm860x-regulator", 453 .owner = THIS_MODULE, 454 }, 455 .probe = pm8607_regulator_probe, 456 .remove = __devexit_p(pm8607_regulator_remove), 457 }; 458 459 static int __init pm8607_regulator_init(void) 460 { 461 return platform_driver_register(&pm8607_regulator_driver); 462 } 463 subsys_initcall(pm8607_regulator_init); 464 465 static void __exit pm8607_regulator_exit(void) 466 { 467 platform_driver_unregister(&pm8607_regulator_driver); 468 } 469 module_exit(pm8607_regulator_exit); 470 471 MODULE_LICENSE("GPL"); 472 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); 473 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC"); 474 MODULE_ALIAS("platform:88pm8607-regulator"); 475