1 /* 2 * Regulator Driver for Freescale MC13892 PMIC 3 * 4 * Copyright 2010 Yong Shen <yong.shen@linaro.org> 5 * 6 * Based on draft driver from Arnaud Patard <arnaud.patard@rtp-net.org> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/mfd/mc13892.h> 14 #include <linux/regulator/machine.h> 15 #include <linux/regulator/driver.h> 16 #include <linux/platform_device.h> 17 #include <linux/kernel.h> 18 #include <linux/slab.h> 19 #include <linux/init.h> 20 #include <linux/err.h> 21 #include <linux/module.h> 22 #include "mc13xxx.h" 23 24 #define MC13892_REVISION 7 25 26 #define MC13892_POWERCTL0 13 27 #define MC13892_POWERCTL0_USEROFFSPI 3 28 #define MC13892_POWERCTL0_VCOINCELLVSEL 20 29 #define MC13892_POWERCTL0_VCOINCELLVSEL_M (7<<20) 30 #define MC13892_POWERCTL0_VCOINCELLEN (1<<23) 31 32 #define MC13892_SWITCHERS0_SWxHI (1<<23) 33 34 #define MC13892_SWITCHERS0 24 35 #define MC13892_SWITCHERS0_SW1VSEL 0 36 #define MC13892_SWITCHERS0_SW1VSEL_M (0x1f<<0) 37 #define MC13892_SWITCHERS0_SW1HI (1<<23) 38 #define MC13892_SWITCHERS0_SW1EN 0 39 40 #define MC13892_SWITCHERS1 25 41 #define MC13892_SWITCHERS1_SW2VSEL 0 42 #define MC13892_SWITCHERS1_SW2VSEL_M (0x1f<<0) 43 #define MC13892_SWITCHERS1_SW2HI (1<<23) 44 #define MC13892_SWITCHERS1_SW2EN 0 45 46 #define MC13892_SWITCHERS2 26 47 #define MC13892_SWITCHERS2_SW3VSEL 0 48 #define MC13892_SWITCHERS2_SW3VSEL_M (0x1f<<0) 49 #define MC13892_SWITCHERS2_SW3HI (1<<23) 50 #define MC13892_SWITCHERS2_SW3EN 0 51 52 #define MC13892_SWITCHERS3 27 53 #define MC13892_SWITCHERS3_SW4VSEL 0 54 #define MC13892_SWITCHERS3_SW4VSEL_M (0x1f<<0) 55 #define MC13892_SWITCHERS3_SW4HI (1<<23) 56 #define MC13892_SWITCHERS3_SW4EN 0 57 58 #define MC13892_SWITCHERS4 28 59 #define MC13892_SWITCHERS4_SW1MODE 0 60 #define MC13892_SWITCHERS4_SW1MODE_AUTO (8<<0) 61 #define MC13892_SWITCHERS4_SW1MODE_M (0xf<<0) 62 #define MC13892_SWITCHERS4_SW2MODE 10 63 #define MC13892_SWITCHERS4_SW2MODE_AUTO (8<<10) 64 #define MC13892_SWITCHERS4_SW2MODE_M (0xf<<10) 65 66 #define MC13892_SWITCHERS5 29 67 #define MC13892_SWITCHERS5_SW3MODE 0 68 #define MC13892_SWITCHERS5_SW3MODE_AUTO (8<<0) 69 #define MC13892_SWITCHERS5_SW3MODE_M (0xf<<0) 70 #define MC13892_SWITCHERS5_SW4MODE 8 71 #define MC13892_SWITCHERS5_SW4MODE_AUTO (8<<8) 72 #define MC13892_SWITCHERS5_SW4MODE_M (0xf<<8) 73 #define MC13892_SWITCHERS5_SWBSTEN (1<<20) 74 75 #define MC13892_REGULATORSETTING0 30 76 #define MC13892_REGULATORSETTING0_VGEN1VSEL 0 77 #define MC13892_REGULATORSETTING0_VDIGVSEL 4 78 #define MC13892_REGULATORSETTING0_VGEN2VSEL 6 79 #define MC13892_REGULATORSETTING0_VPLLVSEL 9 80 #define MC13892_REGULATORSETTING0_VUSB2VSEL 11 81 #define MC13892_REGULATORSETTING0_VGEN3VSEL 14 82 #define MC13892_REGULATORSETTING0_VCAMVSEL 16 83 84 #define MC13892_REGULATORSETTING0_VGEN1VSEL_M (3<<0) 85 #define MC13892_REGULATORSETTING0_VDIGVSEL_M (3<<4) 86 #define MC13892_REGULATORSETTING0_VGEN2VSEL_M (7<<6) 87 #define MC13892_REGULATORSETTING0_VPLLVSEL_M (3<<9) 88 #define MC13892_REGULATORSETTING0_VUSB2VSEL_M (3<<11) 89 #define MC13892_REGULATORSETTING0_VGEN3VSEL_M (1<<14) 90 #define MC13892_REGULATORSETTING0_VCAMVSEL_M (3<<16) 91 92 #define MC13892_REGULATORSETTING1 31 93 #define MC13892_REGULATORSETTING1_VVIDEOVSEL 2 94 #define MC13892_REGULATORSETTING1_VAUDIOVSEL 4 95 #define MC13892_REGULATORSETTING1_VSDVSEL 6 96 97 #define MC13892_REGULATORSETTING1_VVIDEOVSEL_M (3<<2) 98 #define MC13892_REGULATORSETTING1_VAUDIOVSEL_M (3<<4) 99 #define MC13892_REGULATORSETTING1_VSDVSEL_M (7<<6) 100 101 #define MC13892_REGULATORMODE0 32 102 #define MC13892_REGULATORMODE0_VGEN1EN (1<<0) 103 #define MC13892_REGULATORMODE0_VGEN1STDBY (1<<1) 104 #define MC13892_REGULATORMODE0_VGEN1MODE (1<<2) 105 #define MC13892_REGULATORMODE0_VIOHIEN (1<<3) 106 #define MC13892_REGULATORMODE0_VIOHISTDBY (1<<4) 107 #define MC13892_REGULATORMODE0_VIOHIMODE (1<<5) 108 #define MC13892_REGULATORMODE0_VDIGEN (1<<9) 109 #define MC13892_REGULATORMODE0_VDIGSTDBY (1<<10) 110 #define MC13892_REGULATORMODE0_VDIGMODE (1<<11) 111 #define MC13892_REGULATORMODE0_VGEN2EN (1<<12) 112 #define MC13892_REGULATORMODE0_VGEN2STDBY (1<<13) 113 #define MC13892_REGULATORMODE0_VGEN2MODE (1<<14) 114 #define MC13892_REGULATORMODE0_VPLLEN (1<<15) 115 #define MC13892_REGULATORMODE0_VPLLSTDBY (1<<16) 116 #define MC13892_REGULATORMODE0_VPLLMODE (1<<17) 117 #define MC13892_REGULATORMODE0_VUSB2EN (1<<18) 118 #define MC13892_REGULATORMODE0_VUSB2STDBY (1<<19) 119 #define MC13892_REGULATORMODE0_VUSB2MODE (1<<20) 120 121 #define MC13892_REGULATORMODE1 33 122 #define MC13892_REGULATORMODE1_VGEN3EN (1<<0) 123 #define MC13892_REGULATORMODE1_VGEN3STDBY (1<<1) 124 #define MC13892_REGULATORMODE1_VGEN3MODE (1<<2) 125 #define MC13892_REGULATORMODE1_VCAMEN (1<<6) 126 #define MC13892_REGULATORMODE1_VCAMSTDBY (1<<7) 127 #define MC13892_REGULATORMODE1_VCAMMODE (1<<8) 128 #define MC13892_REGULATORMODE1_VCAMCONFIGEN (1<<9) 129 #define MC13892_REGULATORMODE1_VVIDEOEN (1<<12) 130 #define MC13892_REGULATORMODE1_VVIDEOSTDBY (1<<13) 131 #define MC13892_REGULATORMODE1_VVIDEOMODE (1<<14) 132 #define MC13892_REGULATORMODE1_VAUDIOEN (1<<15) 133 #define MC13892_REGULATORMODE1_VAUDIOSTDBY (1<<16) 134 #define MC13892_REGULATORMODE1_VAUDIOMODE (1<<17) 135 #define MC13892_REGULATORMODE1_VSDEN (1<<18) 136 #define MC13892_REGULATORMODE1_VSDSTDBY (1<<19) 137 #define MC13892_REGULATORMODE1_VSDMODE (1<<20) 138 139 #define MC13892_POWERMISC 34 140 #define MC13892_POWERMISC_GPO1EN (1<<6) 141 #define MC13892_POWERMISC_GPO2EN (1<<8) 142 #define MC13892_POWERMISC_GPO3EN (1<<10) 143 #define MC13892_POWERMISC_GPO4EN (1<<12) 144 #define MC13892_POWERMISC_PWGT1SPIEN (1<<15) 145 #define MC13892_POWERMISC_PWGT2SPIEN (1<<16) 146 #define MC13892_POWERMISC_GPO4ADINEN (1<<21) 147 148 #define MC13892_POWERMISC_PWGTSPI_M (3 << 15) 149 150 #define MC13892_USB1 50 151 #define MC13892_USB1_VUSBEN (1<<3) 152 153 static const unsigned int mc13892_vcoincell[] = { 154 2500000, 2700000, 2800000, 2900000, 3000000, 3100000, 155 3200000, 3300000, 156 }; 157 158 static const unsigned int mc13892_sw1[] = { 159 600000, 625000, 650000, 675000, 700000, 725000, 160 750000, 775000, 800000, 825000, 850000, 875000, 161 900000, 925000, 950000, 975000, 1000000, 1025000, 162 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 163 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 164 1350000, 1375000 165 }; 166 167 static const unsigned int mc13892_sw[] = { 168 600000, 625000, 650000, 675000, 700000, 725000, 169 750000, 775000, 800000, 825000, 850000, 875000, 170 900000, 925000, 950000, 975000, 1000000, 1025000, 171 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 172 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 173 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 174 1500000, 1525000, 1550000, 1575000, 1600000, 1625000, 175 1650000, 1675000, 1700000, 1725000, 1750000, 1775000, 176 1800000, 1825000, 1850000, 1875000 177 }; 178 179 static const unsigned int mc13892_swbst[] = { 180 5000000, 181 }; 182 183 static const unsigned int mc13892_viohi[] = { 184 2775000, 185 }; 186 187 static const unsigned int mc13892_vpll[] = { 188 1050000, 1250000, 1650000, 1800000, 189 }; 190 191 static const unsigned int mc13892_vdig[] = { 192 1050000, 1250000, 1650000, 1800000, 193 }; 194 195 static const unsigned int mc13892_vsd[] = { 196 1800000, 2000000, 2600000, 2700000, 197 2800000, 2900000, 3000000, 3150000, 198 }; 199 200 static const unsigned int mc13892_vusb2[] = { 201 2400000, 2600000, 2700000, 2775000, 202 }; 203 204 static const unsigned int mc13892_vvideo[] = { 205 2700000, 2775000, 2500000, 2600000, 206 }; 207 208 static const unsigned int mc13892_vaudio[] = { 209 2300000, 2500000, 2775000, 3000000, 210 }; 211 212 static const unsigned int mc13892_vcam[] = { 213 2500000, 2600000, 2750000, 3000000, 214 }; 215 216 static const unsigned int mc13892_vgen1[] = { 217 1200000, 1500000, 2775000, 3150000, 218 }; 219 220 static const unsigned int mc13892_vgen2[] = { 221 1200000, 1500000, 1600000, 1800000, 222 2700000, 2800000, 3000000, 3150000, 223 }; 224 225 static const unsigned int mc13892_vgen3[] = { 226 1800000, 2900000, 227 }; 228 229 static const unsigned int mc13892_vusb[] = { 230 3300000, 231 }; 232 233 static const unsigned int mc13892_gpo[] = { 234 2750000, 235 }; 236 237 static const unsigned int mc13892_pwgtdrv[] = { 238 5000000, 239 }; 240 241 static struct regulator_ops mc13892_gpo_regulator_ops; 242 /* sw regulators need special care due to the "hi bit" */ 243 static struct regulator_ops mc13892_sw_regulator_ops; 244 245 246 #define MC13892_FIXED_DEFINE(name, reg, voltages) \ 247 MC13xxx_FIXED_DEFINE(MC13892_, name, reg, voltages, \ 248 mc13xxx_fixed_regulator_ops) 249 250 #define MC13892_GPO_DEFINE(name, reg, voltages) \ 251 MC13xxx_GPO_DEFINE(MC13892_, name, reg, voltages, \ 252 mc13892_gpo_regulator_ops) 253 254 #define MC13892_SW_DEFINE(name, reg, vsel_reg, voltages) \ 255 MC13xxx_DEFINE(MC13892_, name, reg, vsel_reg, voltages, \ 256 mc13892_sw_regulator_ops) 257 258 #define MC13892_DEFINE_REGU(name, reg, vsel_reg, voltages) \ 259 MC13xxx_DEFINE(MC13892_, name, reg, vsel_reg, voltages, \ 260 mc13xxx_regulator_ops) 261 262 static struct mc13xxx_regulator mc13892_regulators[] = { 263 MC13892_DEFINE_REGU(VCOINCELL, POWERCTL0, POWERCTL0, mc13892_vcoincell), 264 MC13892_SW_DEFINE(SW1, SWITCHERS0, SWITCHERS0, mc13892_sw1), 265 MC13892_SW_DEFINE(SW2, SWITCHERS1, SWITCHERS1, mc13892_sw), 266 MC13892_SW_DEFINE(SW3, SWITCHERS2, SWITCHERS2, mc13892_sw), 267 MC13892_SW_DEFINE(SW4, SWITCHERS3, SWITCHERS3, mc13892_sw), 268 MC13892_FIXED_DEFINE(SWBST, SWITCHERS5, mc13892_swbst), 269 MC13892_FIXED_DEFINE(VIOHI, REGULATORMODE0, mc13892_viohi), 270 MC13892_DEFINE_REGU(VPLL, REGULATORMODE0, REGULATORSETTING0, \ 271 mc13892_vpll), 272 MC13892_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \ 273 mc13892_vdig), 274 MC13892_DEFINE_REGU(VSD, REGULATORMODE1, REGULATORSETTING1, \ 275 mc13892_vsd), 276 MC13892_DEFINE_REGU(VUSB2, REGULATORMODE0, REGULATORSETTING0, \ 277 mc13892_vusb2), 278 MC13892_DEFINE_REGU(VVIDEO, REGULATORMODE1, REGULATORSETTING1, \ 279 mc13892_vvideo), 280 MC13892_DEFINE_REGU(VAUDIO, REGULATORMODE1, REGULATORSETTING1, \ 281 mc13892_vaudio), 282 MC13892_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \ 283 mc13892_vcam), 284 MC13892_DEFINE_REGU(VGEN1, REGULATORMODE0, REGULATORSETTING0, \ 285 mc13892_vgen1), 286 MC13892_DEFINE_REGU(VGEN2, REGULATORMODE0, REGULATORSETTING0, \ 287 mc13892_vgen2), 288 MC13892_DEFINE_REGU(VGEN3, REGULATORMODE1, REGULATORSETTING0, \ 289 mc13892_vgen3), 290 MC13892_FIXED_DEFINE(VUSB, USB1, mc13892_vusb), 291 MC13892_GPO_DEFINE(GPO1, POWERMISC, mc13892_gpo), 292 MC13892_GPO_DEFINE(GPO2, POWERMISC, mc13892_gpo), 293 MC13892_GPO_DEFINE(GPO3, POWERMISC, mc13892_gpo), 294 MC13892_GPO_DEFINE(GPO4, POWERMISC, mc13892_gpo), 295 MC13892_GPO_DEFINE(PWGT1SPI, POWERMISC, mc13892_pwgtdrv), 296 MC13892_GPO_DEFINE(PWGT2SPI, POWERMISC, mc13892_pwgtdrv), 297 }; 298 299 static int mc13892_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask, 300 u32 val) 301 { 302 struct mc13xxx *mc13892 = priv->mc13xxx; 303 int ret; 304 u32 valread; 305 306 BUG_ON(val & ~mask); 307 308 ret = mc13xxx_reg_read(mc13892, MC13892_POWERMISC, &valread); 309 if (ret) 310 return ret; 311 312 /* Update the stored state for Power Gates. */ 313 priv->powermisc_pwgt_state = 314 (priv->powermisc_pwgt_state & ~mask) | val; 315 priv->powermisc_pwgt_state &= MC13892_POWERMISC_PWGTSPI_M; 316 317 /* Construct the new register value */ 318 valread = (valread & ~mask) | val; 319 /* Overwrite the PWGTxEN with the stored version */ 320 valread = (valread & ~MC13892_POWERMISC_PWGTSPI_M) | 321 priv->powermisc_pwgt_state; 322 323 return mc13xxx_reg_write(mc13892, MC13892_POWERMISC, valread); 324 } 325 326 static int mc13892_gpo_regulator_enable(struct regulator_dev *rdev) 327 { 328 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 329 int id = rdev_get_id(rdev); 330 int ret; 331 u32 en_val = mc13892_regulators[id].enable_bit; 332 u32 mask = mc13892_regulators[id].enable_bit; 333 334 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); 335 336 /* Power Gate enable value is 0 */ 337 if (id == MC13892_PWGT1SPI || id == MC13892_PWGT2SPI) 338 en_val = 0; 339 340 if (id == MC13892_GPO4) 341 mask |= MC13892_POWERMISC_GPO4ADINEN; 342 343 mc13xxx_lock(priv->mc13xxx); 344 ret = mc13892_powermisc_rmw(priv, mask, en_val); 345 mc13xxx_unlock(priv->mc13xxx); 346 347 return ret; 348 } 349 350 static int mc13892_gpo_regulator_disable(struct regulator_dev *rdev) 351 { 352 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 353 int id = rdev_get_id(rdev); 354 int ret; 355 u32 dis_val = 0; 356 357 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); 358 359 /* Power Gate disable value is 1 */ 360 if (id == MC13892_PWGT1SPI || id == MC13892_PWGT2SPI) 361 dis_val = mc13892_regulators[id].enable_bit; 362 363 mc13xxx_lock(priv->mc13xxx); 364 ret = mc13892_powermisc_rmw(priv, mc13892_regulators[id].enable_bit, 365 dis_val); 366 mc13xxx_unlock(priv->mc13xxx); 367 368 return ret; 369 } 370 371 static int mc13892_gpo_regulator_is_enabled(struct regulator_dev *rdev) 372 { 373 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 374 int ret, id = rdev_get_id(rdev); 375 unsigned int val; 376 377 mc13xxx_lock(priv->mc13xxx); 378 ret = mc13xxx_reg_read(priv->mc13xxx, mc13892_regulators[id].reg, &val); 379 mc13xxx_unlock(priv->mc13xxx); 380 381 if (ret) 382 return ret; 383 384 /* Power Gates state is stored in powermisc_pwgt_state 385 * where the meaning of bits is negated */ 386 val = (val & ~MC13892_POWERMISC_PWGTSPI_M) | 387 (priv->powermisc_pwgt_state ^ MC13892_POWERMISC_PWGTSPI_M); 388 389 return (val & mc13892_regulators[id].enable_bit) != 0; 390 } 391 392 393 static struct regulator_ops mc13892_gpo_regulator_ops = { 394 .enable = mc13892_gpo_regulator_enable, 395 .disable = mc13892_gpo_regulator_disable, 396 .is_enabled = mc13892_gpo_regulator_is_enabled, 397 .list_voltage = regulator_list_voltage_table, 398 .set_voltage = mc13xxx_fixed_regulator_set_voltage, 399 .get_voltage = mc13xxx_fixed_regulator_get_voltage, 400 }; 401 402 static int mc13892_sw_regulator_get_voltage(struct regulator_dev *rdev) 403 { 404 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 405 int ret, id = rdev_get_id(rdev); 406 unsigned int val, hi; 407 408 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); 409 410 mc13xxx_lock(priv->mc13xxx); 411 ret = mc13xxx_reg_read(priv->mc13xxx, 412 mc13892_regulators[id].vsel_reg, &val); 413 mc13xxx_unlock(priv->mc13xxx); 414 if (ret) 415 return ret; 416 417 hi = val & MC13892_SWITCHERS0_SWxHI; 418 val = (val & mc13892_regulators[id].vsel_mask) 419 >> mc13892_regulators[id].vsel_shift; 420 421 dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val); 422 423 if (hi) 424 val = (25000 * val) + 1100000; 425 else 426 val = (25000 * val) + 600000; 427 428 return val; 429 } 430 431 static int mc13892_sw_regulator_set_voltage_sel(struct regulator_dev *rdev, 432 unsigned selector) 433 { 434 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 435 int hi, value, mask, id = rdev_get_id(rdev); 436 u32 valread; 437 int ret; 438 439 value = rdev->desc->volt_table[selector]; 440 441 mc13xxx_lock(priv->mc13xxx); 442 ret = mc13xxx_reg_read(priv->mc13xxx, 443 mc13892_regulators[id].vsel_reg, &valread); 444 if (ret) 445 goto err; 446 447 if (value > 1375000) 448 hi = 1; 449 else if (value < 1100000) 450 hi = 0; 451 else 452 hi = valread & MC13892_SWITCHERS0_SWxHI; 453 454 if (hi) { 455 value = (value - 1100000) / 25000; 456 value |= MC13892_SWITCHERS0_SWxHI; 457 } else 458 value = (value - 600000) / 25000; 459 460 mask = mc13892_regulators[id].vsel_mask | MC13892_SWITCHERS0_SWxHI; 461 valread = (valread & ~mask) | 462 (value << mc13892_regulators[id].vsel_shift); 463 ret = mc13xxx_reg_write(priv->mc13xxx, mc13892_regulators[id].vsel_reg, 464 valread); 465 err: 466 mc13xxx_unlock(priv->mc13xxx); 467 468 return ret; 469 } 470 471 static struct regulator_ops mc13892_sw_regulator_ops = { 472 .list_voltage = regulator_list_voltage_table, 473 .set_voltage_sel = mc13892_sw_regulator_set_voltage_sel, 474 .get_voltage = mc13892_sw_regulator_get_voltage, 475 }; 476 477 static int mc13892_vcam_set_mode(struct regulator_dev *rdev, unsigned int mode) 478 { 479 unsigned int en_val = 0; 480 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 481 int ret, id = rdev_get_id(rdev); 482 483 if (mode == REGULATOR_MODE_FAST) 484 en_val = MC13892_REGULATORMODE1_VCAMCONFIGEN; 485 486 mc13xxx_lock(priv->mc13xxx); 487 ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].reg, 488 MC13892_REGULATORMODE1_VCAMCONFIGEN, en_val); 489 mc13xxx_unlock(priv->mc13xxx); 490 491 return ret; 492 } 493 494 static unsigned int mc13892_vcam_get_mode(struct regulator_dev *rdev) 495 { 496 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 497 int ret, id = rdev_get_id(rdev); 498 unsigned int val; 499 500 mc13xxx_lock(priv->mc13xxx); 501 ret = mc13xxx_reg_read(priv->mc13xxx, mc13892_regulators[id].reg, &val); 502 mc13xxx_unlock(priv->mc13xxx); 503 504 if (ret) 505 return ret; 506 507 if (val & MC13892_REGULATORMODE1_VCAMCONFIGEN) 508 return REGULATOR_MODE_FAST; 509 510 return REGULATOR_MODE_NORMAL; 511 } 512 513 514 static int __devinit mc13892_regulator_probe(struct platform_device *pdev) 515 { 516 struct mc13xxx_regulator_priv *priv; 517 struct mc13xxx *mc13892 = dev_get_drvdata(pdev->dev.parent); 518 struct mc13xxx_regulator_platform_data *pdata = 519 dev_get_platdata(&pdev->dev); 520 struct mc13xxx_regulator_init_data *mc13xxx_data; 521 struct regulator_config config = { }; 522 int i, ret; 523 int num_regulators = 0; 524 u32 val; 525 526 num_regulators = mc13xxx_get_num_regulators_dt(pdev); 527 if (num_regulators <= 0 && pdata) 528 num_regulators = pdata->num_regulators; 529 if (num_regulators <= 0) 530 return -EINVAL; 531 532 priv = devm_kzalloc(&pdev->dev, sizeof(*priv) + 533 num_regulators * sizeof(priv->regulators[0]), 534 GFP_KERNEL); 535 if (!priv) 536 return -ENOMEM; 537 538 priv->num_regulators = num_regulators; 539 priv->mc13xxx_regulators = mc13892_regulators; 540 priv->mc13xxx = mc13892; 541 platform_set_drvdata(pdev, priv); 542 543 mc13xxx_lock(mc13892); 544 ret = mc13xxx_reg_read(mc13892, MC13892_REVISION, &val); 545 if (ret) 546 goto err_unlock; 547 548 /* enable switch auto mode */ 549 if ((val & 0x0000FFFF) == 0x45d0) { 550 ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS4, 551 MC13892_SWITCHERS4_SW1MODE_M | 552 MC13892_SWITCHERS4_SW2MODE_M, 553 MC13892_SWITCHERS4_SW1MODE_AUTO | 554 MC13892_SWITCHERS4_SW2MODE_AUTO); 555 if (ret) 556 goto err_unlock; 557 558 ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS5, 559 MC13892_SWITCHERS5_SW3MODE_M | 560 MC13892_SWITCHERS5_SW4MODE_M, 561 MC13892_SWITCHERS5_SW3MODE_AUTO | 562 MC13892_SWITCHERS5_SW4MODE_AUTO); 563 if (ret) 564 goto err_unlock; 565 } 566 mc13xxx_unlock(mc13892); 567 568 mc13892_regulators[MC13892_VCAM].desc.ops->set_mode 569 = mc13892_vcam_set_mode; 570 mc13892_regulators[MC13892_VCAM].desc.ops->get_mode 571 = mc13892_vcam_get_mode; 572 573 mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13892_regulators, 574 ARRAY_SIZE(mc13892_regulators)); 575 for (i = 0; i < num_regulators; i++) { 576 struct regulator_init_data *init_data; 577 struct regulator_desc *desc; 578 struct device_node *node = NULL; 579 int id; 580 581 if (mc13xxx_data) { 582 id = mc13xxx_data[i].id; 583 init_data = mc13xxx_data[i].init_data; 584 node = mc13xxx_data[i].node; 585 } else { 586 id = pdata->regulators[i].id; 587 init_data = pdata->regulators[i].init_data; 588 } 589 desc = &mc13892_regulators[id].desc; 590 591 config.dev = &pdev->dev; 592 config.init_data = init_data; 593 config.driver_data = priv; 594 config.of_node = node; 595 596 priv->regulators[i] = regulator_register(desc, &config); 597 if (IS_ERR(priv->regulators[i])) { 598 dev_err(&pdev->dev, "failed to register regulator %s\n", 599 mc13892_regulators[i].desc.name); 600 ret = PTR_ERR(priv->regulators[i]); 601 goto err; 602 } 603 } 604 605 return 0; 606 err: 607 while (--i >= 0) 608 regulator_unregister(priv->regulators[i]); 609 return ret; 610 611 err_unlock: 612 mc13xxx_unlock(mc13892); 613 return ret; 614 } 615 616 static int __devexit mc13892_regulator_remove(struct platform_device *pdev) 617 { 618 struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev); 619 int i; 620 621 platform_set_drvdata(pdev, NULL); 622 623 for (i = 0; i < priv->num_regulators; i++) 624 regulator_unregister(priv->regulators[i]); 625 626 return 0; 627 } 628 629 static struct platform_driver mc13892_regulator_driver = { 630 .driver = { 631 .name = "mc13892-regulator", 632 .owner = THIS_MODULE, 633 }, 634 .remove = __devexit_p(mc13892_regulator_remove), 635 .probe = mc13892_regulator_probe, 636 }; 637 638 static int __init mc13892_regulator_init(void) 639 { 640 return platform_driver_register(&mc13892_regulator_driver); 641 } 642 subsys_initcall(mc13892_regulator_init); 643 644 static void __exit mc13892_regulator_exit(void) 645 { 646 platform_driver_unregister(&mc13892_regulator_driver); 647 } 648 module_exit(mc13892_regulator_exit); 649 650 MODULE_LICENSE("GPL v2"); 651 MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>"); 652 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13892 PMIC"); 653 MODULE_ALIAS("platform:mc13892-regulator"); 654