1 /* 2 * MFD driver for TWL6040 audio device 3 * 4 * Authors: Misael Lopez Cruz <misael.lopez@ti.com> 5 * Jorge Eduardo Candelaria <jorge.candelaria@ti.com> 6 * Peter Ujfalusi <peter.ujfalusi@ti.com> 7 * 8 * Copyright: (C) 2011 Texas Instruments, Inc. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 22 * 02110-1301 USA 23 * 24 */ 25 26 #include <linux/module.h> 27 #include <linux/types.h> 28 #include <linux/slab.h> 29 #include <linux/kernel.h> 30 #include <linux/err.h> 31 #include <linux/platform_device.h> 32 #include <linux/of.h> 33 #include <linux/of_irq.h> 34 #include <linux/of_gpio.h> 35 #include <linux/of_platform.h> 36 #include <linux/gpio.h> 37 #include <linux/delay.h> 38 #include <linux/i2c.h> 39 #include <linux/regmap.h> 40 #include <linux/mfd/core.h> 41 #include <linux/mfd/twl6040.h> 42 #include <linux/regulator/consumer.h> 43 44 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1) 45 #define TWL6040_NUM_SUPPLIES (2) 46 47 static const struct reg_default twl6040_defaults[] = { 48 { 0x01, 0x4B }, /* REG_ASICID (ro) */ 49 { 0x02, 0x00 }, /* REG_ASICREV (ro) */ 50 { 0x03, 0x00 }, /* REG_INTID */ 51 { 0x04, 0x00 }, /* REG_INTMR */ 52 { 0x05, 0x00 }, /* REG_NCPCTRL */ 53 { 0x06, 0x00 }, /* REG_LDOCTL */ 54 { 0x07, 0x60 }, /* REG_HPPLLCTL */ 55 { 0x08, 0x00 }, /* REG_LPPLLCTL */ 56 { 0x09, 0x4A }, /* REG_LPPLLDIV */ 57 { 0x0A, 0x00 }, /* REG_AMICBCTL */ 58 { 0x0B, 0x00 }, /* REG_DMICBCTL */ 59 { 0x0C, 0x00 }, /* REG_MICLCTL */ 60 { 0x0D, 0x00 }, /* REG_MICRCTL */ 61 { 0x0E, 0x00 }, /* REG_MICGAIN */ 62 { 0x0F, 0x1B }, /* REG_LINEGAIN */ 63 { 0x10, 0x00 }, /* REG_HSLCTL */ 64 { 0x11, 0x00 }, /* REG_HSRCTL */ 65 { 0x12, 0x00 }, /* REG_HSGAIN */ 66 { 0x13, 0x00 }, /* REG_EARCTL */ 67 { 0x14, 0x00 }, /* REG_HFLCTL */ 68 { 0x15, 0x00 }, /* REG_HFLGAIN */ 69 { 0x16, 0x00 }, /* REG_HFRCTL */ 70 { 0x17, 0x00 }, /* REG_HFRGAIN */ 71 { 0x18, 0x00 }, /* REG_VIBCTLL */ 72 { 0x19, 0x00 }, /* REG_VIBDATL */ 73 { 0x1A, 0x00 }, /* REG_VIBCTLR */ 74 { 0x1B, 0x00 }, /* REG_VIBDATR */ 75 { 0x1C, 0x00 }, /* REG_HKCTL1 */ 76 { 0x1D, 0x00 }, /* REG_HKCTL2 */ 77 { 0x1E, 0x00 }, /* REG_GPOCTL */ 78 { 0x1F, 0x00 }, /* REG_ALB */ 79 { 0x20, 0x00 }, /* REG_DLB */ 80 /* 0x28, REG_TRIM1 */ 81 /* 0x29, REG_TRIM2 */ 82 /* 0x2A, REG_TRIM3 */ 83 /* 0x2B, REG_HSOTRIM */ 84 /* 0x2C, REG_HFOTRIM */ 85 { 0x2D, 0x08 }, /* REG_ACCCTL */ 86 { 0x2E, 0x00 }, /* REG_STATUS (ro) */ 87 }; 88 89 static struct reg_default twl6040_patch[] = { 90 /* 91 * Select I2C bus access to dual access registers 92 * Interrupt register is cleared on read 93 * Select fast mode for i2c (400KHz) 94 */ 95 { TWL6040_REG_ACCCTL, 96 TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) }, 97 }; 98 99 100 static bool twl6040_has_vibra(struct device_node *node) 101 { 102 #ifdef CONFIG_OF 103 if (of_find_node_by_name(node, "vibra")) 104 return true; 105 #endif 106 return false; 107 } 108 109 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg) 110 { 111 int ret; 112 unsigned int val; 113 114 ret = regmap_read(twl6040->regmap, reg, &val); 115 if (ret < 0) 116 return ret; 117 118 return val; 119 } 120 EXPORT_SYMBOL(twl6040_reg_read); 121 122 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val) 123 { 124 int ret; 125 126 ret = regmap_write(twl6040->regmap, reg, val); 127 128 return ret; 129 } 130 EXPORT_SYMBOL(twl6040_reg_write); 131 132 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) 133 { 134 return regmap_update_bits(twl6040->regmap, reg, mask, mask); 135 } 136 EXPORT_SYMBOL(twl6040_set_bits); 137 138 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) 139 { 140 return regmap_update_bits(twl6040->regmap, reg, mask, 0); 141 } 142 EXPORT_SYMBOL(twl6040_clear_bits); 143 144 /* twl6040 codec manual power-up sequence */ 145 static int twl6040_power_up_manual(struct twl6040 *twl6040) 146 { 147 u8 ldoctl, ncpctl, lppllctl; 148 int ret; 149 150 /* enable high-side LDO, reference system and internal oscillator */ 151 ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA; 152 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 153 if (ret) 154 return ret; 155 usleep_range(10000, 10500); 156 157 /* enable negative charge pump */ 158 ncpctl = TWL6040_NCPENA; 159 ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); 160 if (ret) 161 goto ncp_err; 162 usleep_range(1000, 1500); 163 164 /* enable low-side LDO */ 165 ldoctl |= TWL6040_LSLDOENA; 166 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 167 if (ret) 168 goto lsldo_err; 169 usleep_range(1000, 1500); 170 171 /* enable low-power PLL */ 172 lppllctl = TWL6040_LPLLENA; 173 ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); 174 if (ret) 175 goto lppll_err; 176 usleep_range(5000, 5500); 177 178 /* disable internal oscillator */ 179 ldoctl &= ~TWL6040_OSCENA; 180 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 181 if (ret) 182 goto osc_err; 183 184 return 0; 185 186 osc_err: 187 lppllctl &= ~TWL6040_LPLLENA; 188 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); 189 lppll_err: 190 ldoctl &= ~TWL6040_LSLDOENA; 191 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 192 lsldo_err: 193 ncpctl &= ~TWL6040_NCPENA; 194 twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); 195 ncp_err: 196 ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); 197 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 198 199 dev_err(twl6040->dev, "manual power-up failed\n"); 200 return ret; 201 } 202 203 /* twl6040 manual power-down sequence */ 204 static void twl6040_power_down_manual(struct twl6040 *twl6040) 205 { 206 u8 ncpctl, ldoctl, lppllctl; 207 208 ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL); 209 ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL); 210 lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); 211 212 /* enable internal oscillator */ 213 ldoctl |= TWL6040_OSCENA; 214 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 215 usleep_range(1000, 1500); 216 217 /* disable low-power PLL */ 218 lppllctl &= ~TWL6040_LPLLENA; 219 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); 220 221 /* disable low-side LDO */ 222 ldoctl &= ~TWL6040_LSLDOENA; 223 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 224 225 /* disable negative charge pump */ 226 ncpctl &= ~TWL6040_NCPENA; 227 twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); 228 229 /* disable high-side LDO, reference system and internal oscillator */ 230 ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); 231 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); 232 } 233 234 static irqreturn_t twl6040_readyint_handler(int irq, void *data) 235 { 236 struct twl6040 *twl6040 = data; 237 238 complete(&twl6040->ready); 239 240 return IRQ_HANDLED; 241 } 242 243 static irqreturn_t twl6040_thint_handler(int irq, void *data) 244 { 245 struct twl6040 *twl6040 = data; 246 u8 status; 247 248 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS); 249 if (status & TWL6040_TSHUTDET) { 250 dev_warn(twl6040->dev, "Thermal shutdown, powering-off"); 251 twl6040_power(twl6040, 0); 252 } else { 253 dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on"); 254 twl6040_power(twl6040, 1); 255 } 256 257 return IRQ_HANDLED; 258 } 259 260 static int twl6040_power_up_automatic(struct twl6040 *twl6040) 261 { 262 int time_left; 263 264 gpio_set_value(twl6040->audpwron, 1); 265 266 time_left = wait_for_completion_timeout(&twl6040->ready, 267 msecs_to_jiffies(144)); 268 if (!time_left) { 269 u8 intid; 270 271 dev_warn(twl6040->dev, "timeout waiting for READYINT\n"); 272 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID); 273 if (!(intid & TWL6040_READYINT)) { 274 dev_err(twl6040->dev, "automatic power-up failed\n"); 275 gpio_set_value(twl6040->audpwron, 0); 276 return -ETIMEDOUT; 277 } 278 } 279 280 return 0; 281 } 282 283 int twl6040_power(struct twl6040 *twl6040, int on) 284 { 285 int ret = 0; 286 287 mutex_lock(&twl6040->mutex); 288 289 if (on) { 290 /* already powered-up */ 291 if (twl6040->power_count++) 292 goto out; 293 294 clk_prepare_enable(twl6040->clk32k); 295 296 /* Allow writes to the chip */ 297 regcache_cache_only(twl6040->regmap, false); 298 299 if (gpio_is_valid(twl6040->audpwron)) { 300 /* use automatic power-up sequence */ 301 ret = twl6040_power_up_automatic(twl6040); 302 if (ret) { 303 twl6040->power_count = 0; 304 goto out; 305 } 306 } else { 307 /* use manual power-up sequence */ 308 ret = twl6040_power_up_manual(twl6040); 309 if (ret) { 310 twl6040->power_count = 0; 311 goto out; 312 } 313 } 314 315 /* Sync with the HW */ 316 regcache_sync(twl6040->regmap); 317 318 /* Default PLL configuration after power up */ 319 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL; 320 twl6040->sysclk = 19200000; 321 twl6040->mclk = 32768; 322 } else { 323 /* already powered-down */ 324 if (!twl6040->power_count) { 325 dev_err(twl6040->dev, 326 "device is already powered-off\n"); 327 ret = -EPERM; 328 goto out; 329 } 330 331 if (--twl6040->power_count) 332 goto out; 333 334 if (gpio_is_valid(twl6040->audpwron)) { 335 /* use AUDPWRON line */ 336 gpio_set_value(twl6040->audpwron, 0); 337 338 /* power-down sequence latency */ 339 usleep_range(500, 700); 340 } else { 341 /* use manual power-down sequence */ 342 twl6040_power_down_manual(twl6040); 343 } 344 345 /* Set regmap to cache only and mark it as dirty */ 346 regcache_cache_only(twl6040->regmap, true); 347 regcache_mark_dirty(twl6040->regmap); 348 349 twl6040->sysclk = 0; 350 twl6040->mclk = 0; 351 352 clk_disable_unprepare(twl6040->clk32k); 353 } 354 355 out: 356 mutex_unlock(&twl6040->mutex); 357 return ret; 358 } 359 EXPORT_SYMBOL(twl6040_power); 360 361 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id, 362 unsigned int freq_in, unsigned int freq_out) 363 { 364 u8 hppllctl, lppllctl; 365 int ret = 0; 366 367 mutex_lock(&twl6040->mutex); 368 369 hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL); 370 lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); 371 372 /* Force full reconfiguration when switching between PLL */ 373 if (pll_id != twl6040->pll) { 374 twl6040->sysclk = 0; 375 twl6040->mclk = 0; 376 } 377 378 switch (pll_id) { 379 case TWL6040_SYSCLK_SEL_LPPLL: 380 /* low-power PLL divider */ 381 /* Change the sysclk configuration only if it has been canged */ 382 if (twl6040->sysclk != freq_out) { 383 switch (freq_out) { 384 case 17640000: 385 lppllctl |= TWL6040_LPLLFIN; 386 break; 387 case 19200000: 388 lppllctl &= ~TWL6040_LPLLFIN; 389 break; 390 default: 391 dev_err(twl6040->dev, 392 "freq_out %d not supported\n", 393 freq_out); 394 ret = -EINVAL; 395 goto pll_out; 396 } 397 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 398 lppllctl); 399 } 400 401 /* The PLL in use has not been change, we can exit */ 402 if (twl6040->pll == pll_id) 403 break; 404 405 switch (freq_in) { 406 case 32768: 407 lppllctl |= TWL6040_LPLLENA; 408 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 409 lppllctl); 410 mdelay(5); 411 lppllctl &= ~TWL6040_HPLLSEL; 412 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 413 lppllctl); 414 hppllctl &= ~TWL6040_HPLLENA; 415 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, 416 hppllctl); 417 break; 418 default: 419 dev_err(twl6040->dev, 420 "freq_in %d not supported\n", freq_in); 421 ret = -EINVAL; 422 goto pll_out; 423 } 424 break; 425 case TWL6040_SYSCLK_SEL_HPPLL: 426 /* high-performance PLL can provide only 19.2 MHz */ 427 if (freq_out != 19200000) { 428 dev_err(twl6040->dev, 429 "freq_out %d not supported\n", freq_out); 430 ret = -EINVAL; 431 goto pll_out; 432 } 433 434 if (twl6040->mclk != freq_in) { 435 hppllctl &= ~TWL6040_MCLK_MSK; 436 437 switch (freq_in) { 438 case 12000000: 439 /* PLL enabled, active mode */ 440 hppllctl |= TWL6040_MCLK_12000KHZ | 441 TWL6040_HPLLENA; 442 break; 443 case 19200000: 444 /* PLL enabled, bypass mode */ 445 hppllctl |= TWL6040_MCLK_19200KHZ | 446 TWL6040_HPLLBP | TWL6040_HPLLENA; 447 break; 448 case 26000000: 449 /* PLL enabled, active mode */ 450 hppllctl |= TWL6040_MCLK_26000KHZ | 451 TWL6040_HPLLENA; 452 break; 453 case 38400000: 454 /* PLL enabled, bypass mode */ 455 hppllctl |= TWL6040_MCLK_38400KHZ | 456 TWL6040_HPLLBP | TWL6040_HPLLENA; 457 break; 458 default: 459 dev_err(twl6040->dev, 460 "freq_in %d not supported\n", freq_in); 461 ret = -EINVAL; 462 goto pll_out; 463 } 464 465 /* 466 * enable clock slicer to ensure input waveform is 467 * square 468 */ 469 hppllctl |= TWL6040_HPLLSQRENA; 470 471 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, 472 hppllctl); 473 usleep_range(500, 700); 474 lppllctl |= TWL6040_HPLLSEL; 475 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 476 lppllctl); 477 lppllctl &= ~TWL6040_LPLLENA; 478 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 479 lppllctl); 480 } 481 break; 482 default: 483 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id); 484 ret = -EINVAL; 485 goto pll_out; 486 } 487 488 twl6040->sysclk = freq_out; 489 twl6040->mclk = freq_in; 490 twl6040->pll = pll_id; 491 492 pll_out: 493 mutex_unlock(&twl6040->mutex); 494 return ret; 495 } 496 EXPORT_SYMBOL(twl6040_set_pll); 497 498 int twl6040_get_pll(struct twl6040 *twl6040) 499 { 500 if (twl6040->power_count) 501 return twl6040->pll; 502 else 503 return -ENODEV; 504 } 505 EXPORT_SYMBOL(twl6040_get_pll); 506 507 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040) 508 { 509 return twl6040->sysclk; 510 } 511 EXPORT_SYMBOL(twl6040_get_sysclk); 512 513 /* Get the combined status of the vibra control register */ 514 int twl6040_get_vibralr_status(struct twl6040 *twl6040) 515 { 516 unsigned int reg; 517 int ret; 518 u8 status; 519 520 ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, ®); 521 if (ret != 0) 522 return ret; 523 status = reg; 524 525 ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, ®); 526 if (ret != 0) 527 return ret; 528 status |= reg; 529 530 status &= (TWL6040_VIBENA | TWL6040_VIBSEL); 531 532 return status; 533 } 534 EXPORT_SYMBOL(twl6040_get_vibralr_status); 535 536 static struct resource twl6040_vibra_rsrc[] = { 537 { 538 .flags = IORESOURCE_IRQ, 539 }, 540 }; 541 542 static struct resource twl6040_codec_rsrc[] = { 543 { 544 .flags = IORESOURCE_IRQ, 545 }, 546 }; 547 548 static bool twl6040_readable_reg(struct device *dev, unsigned int reg) 549 { 550 /* Register 0 is not readable */ 551 if (!reg) 552 return false; 553 return true; 554 } 555 556 static bool twl6040_volatile_reg(struct device *dev, unsigned int reg) 557 { 558 switch (reg) { 559 case TWL6040_REG_ASICID: 560 case TWL6040_REG_ASICREV: 561 case TWL6040_REG_INTID: 562 case TWL6040_REG_LPPLLCTL: 563 case TWL6040_REG_HPPLLCTL: 564 case TWL6040_REG_STATUS: 565 return true; 566 default: 567 return false; 568 } 569 } 570 571 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg) 572 { 573 switch (reg) { 574 case TWL6040_REG_ASICID: 575 case TWL6040_REG_ASICREV: 576 case TWL6040_REG_STATUS: 577 return false; 578 default: 579 return true; 580 } 581 } 582 583 static const struct regmap_config twl6040_regmap_config = { 584 .reg_bits = 8, 585 .val_bits = 8, 586 587 .reg_defaults = twl6040_defaults, 588 .num_reg_defaults = ARRAY_SIZE(twl6040_defaults), 589 590 .max_register = TWL6040_REG_STATUS, /* 0x2e */ 591 592 .readable_reg = twl6040_readable_reg, 593 .volatile_reg = twl6040_volatile_reg, 594 .writeable_reg = twl6040_writeable_reg, 595 596 .cache_type = REGCACHE_RBTREE, 597 }; 598 599 static const struct regmap_irq twl6040_irqs[] = { 600 { .reg_offset = 0, .mask = TWL6040_THINT, }, 601 { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, }, 602 { .reg_offset = 0, .mask = TWL6040_HOOKINT, }, 603 { .reg_offset = 0, .mask = TWL6040_HFINT, }, 604 { .reg_offset = 0, .mask = TWL6040_VIBINT, }, 605 { .reg_offset = 0, .mask = TWL6040_READYINT, }, 606 }; 607 608 static struct regmap_irq_chip twl6040_irq_chip = { 609 .name = "twl6040", 610 .irqs = twl6040_irqs, 611 .num_irqs = ARRAY_SIZE(twl6040_irqs), 612 613 .num_regs = 1, 614 .status_base = TWL6040_REG_INTID, 615 .mask_base = TWL6040_REG_INTMR, 616 }; 617 618 static int twl6040_probe(struct i2c_client *client, 619 const struct i2c_device_id *id) 620 { 621 struct device_node *node = client->dev.of_node; 622 struct twl6040 *twl6040; 623 struct mfd_cell *cell = NULL; 624 int irq, ret, children = 0; 625 626 if (!node) { 627 dev_err(&client->dev, "of node is missing\n"); 628 return -EINVAL; 629 } 630 631 /* In order to operate correctly we need valid interrupt config */ 632 if (!client->irq) { 633 dev_err(&client->dev, "Invalid IRQ configuration\n"); 634 return -EINVAL; 635 } 636 637 twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040), 638 GFP_KERNEL); 639 if (!twl6040) 640 return -ENOMEM; 641 642 twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config); 643 if (IS_ERR(twl6040->regmap)) 644 return PTR_ERR(twl6040->regmap); 645 646 i2c_set_clientdata(client, twl6040); 647 648 twl6040->clk32k = devm_clk_get(&client->dev, "clk32k"); 649 if (IS_ERR(twl6040->clk32k)) { 650 dev_info(&client->dev, "clk32k is not handled\n"); 651 twl6040->clk32k = NULL; 652 } 653 654 twl6040->supplies[0].supply = "vio"; 655 twl6040->supplies[1].supply = "v2v1"; 656 ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES, 657 twl6040->supplies); 658 if (ret != 0) { 659 dev_err(&client->dev, "Failed to get supplies: %d\n", ret); 660 return ret; 661 } 662 663 ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies); 664 if (ret != 0) { 665 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret); 666 return ret; 667 } 668 669 twl6040->dev = &client->dev; 670 twl6040->irq = client->irq; 671 672 mutex_init(&twl6040->mutex); 673 init_completion(&twl6040->ready); 674 675 regmap_register_patch(twl6040->regmap, twl6040_patch, 676 ARRAY_SIZE(twl6040_patch)); 677 678 twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV); 679 if (twl6040->rev < 0) { 680 dev_err(&client->dev, "Failed to read revision register: %d\n", 681 twl6040->rev); 682 ret = twl6040->rev; 683 goto gpio_err; 684 } 685 686 /* ERRATA: Automatic power-up is not possible in ES1.0 */ 687 if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) 688 twl6040->audpwron = of_get_named_gpio(node, 689 "ti,audpwron-gpio", 0); 690 else 691 twl6040->audpwron = -EINVAL; 692 693 if (gpio_is_valid(twl6040->audpwron)) { 694 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron, 695 GPIOF_OUT_INIT_LOW, "audpwron"); 696 if (ret) 697 goto gpio_err; 698 699 /* Clear any pending interrupt */ 700 twl6040_reg_read(twl6040, TWL6040_REG_INTID); 701 } 702 703 ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT, 704 0, &twl6040_irq_chip, &twl6040->irq_data); 705 if (ret < 0) 706 goto gpio_err; 707 708 twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data, 709 TWL6040_IRQ_READY); 710 twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data, 711 TWL6040_IRQ_TH); 712 713 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL, 714 twl6040_readyint_handler, IRQF_ONESHOT, 715 "twl6040_irq_ready", twl6040); 716 if (ret) { 717 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret); 718 goto readyirq_err; 719 } 720 721 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL, 722 twl6040_thint_handler, IRQF_ONESHOT, 723 "twl6040_irq_th", twl6040); 724 if (ret) { 725 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret); 726 goto readyirq_err; 727 } 728 729 /* 730 * The main functionality of twl6040 to provide audio on OMAP4+ systems. 731 * We can add the ASoC codec child whenever this driver has been loaded. 732 */ 733 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG); 734 cell = &twl6040->cells[children]; 735 cell->name = "twl6040-codec"; 736 twl6040_codec_rsrc[0].start = irq; 737 twl6040_codec_rsrc[0].end = irq; 738 cell->resources = twl6040_codec_rsrc; 739 cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc); 740 children++; 741 742 /* Vibra input driver support */ 743 if (twl6040_has_vibra(node)) { 744 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB); 745 746 cell = &twl6040->cells[children]; 747 cell->name = "twl6040-vibra"; 748 twl6040_vibra_rsrc[0].start = irq; 749 twl6040_vibra_rsrc[0].end = irq; 750 cell->resources = twl6040_vibra_rsrc; 751 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc); 752 children++; 753 } 754 755 /* GPO support */ 756 cell = &twl6040->cells[children]; 757 cell->name = "twl6040-gpo"; 758 children++; 759 760 /* The chip is powered down so mark regmap to cache only and dirty */ 761 regcache_cache_only(twl6040->regmap, true); 762 regcache_mark_dirty(twl6040->regmap); 763 764 ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children, 765 NULL, 0, NULL); 766 if (ret) 767 goto readyirq_err; 768 769 return 0; 770 771 readyirq_err: 772 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data); 773 gpio_err: 774 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies); 775 return ret; 776 } 777 778 static int twl6040_remove(struct i2c_client *client) 779 { 780 struct twl6040 *twl6040 = i2c_get_clientdata(client); 781 782 if (twl6040->power_count) 783 twl6040_power(twl6040, 0); 784 785 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data); 786 787 mfd_remove_devices(&client->dev); 788 789 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies); 790 791 return 0; 792 } 793 794 static const struct i2c_device_id twl6040_i2c_id[] = { 795 { "twl6040", 0, }, 796 { "twl6041", 0, }, 797 { }, 798 }; 799 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id); 800 801 static struct i2c_driver twl6040_driver = { 802 .driver = { 803 .name = "twl6040", 804 .owner = THIS_MODULE, 805 }, 806 .probe = twl6040_probe, 807 .remove = twl6040_remove, 808 .id_table = twl6040_i2c_id, 809 }; 810 811 module_i2c_driver(twl6040_driver); 812 813 MODULE_DESCRIPTION("TWL6040 MFD"); 814 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); 815 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>"); 816 MODULE_LICENSE("GPL"); 817