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_sequence 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 ret = clk_prepare_enable(twl6040->clk32k); 295 if (ret) { 296 twl6040->power_count = 0; 297 goto out; 298 } 299 300 /* Allow writes to the chip */ 301 regcache_cache_only(twl6040->regmap, false); 302 303 if (gpio_is_valid(twl6040->audpwron)) { 304 /* use automatic power-up sequence */ 305 ret = twl6040_power_up_automatic(twl6040); 306 if (ret) { 307 clk_disable_unprepare(twl6040->clk32k); 308 twl6040->power_count = 0; 309 goto out; 310 } 311 } else { 312 /* use manual power-up sequence */ 313 ret = twl6040_power_up_manual(twl6040); 314 if (ret) { 315 clk_disable_unprepare(twl6040->clk32k); 316 twl6040->power_count = 0; 317 goto out; 318 } 319 } 320 321 /* Sync with the HW */ 322 regcache_sync(twl6040->regmap); 323 324 /* Default PLL configuration after power up */ 325 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL; 326 twl6040->sysclk_rate = 19200000; 327 } else { 328 /* already powered-down */ 329 if (!twl6040->power_count) { 330 dev_err(twl6040->dev, 331 "device is already powered-off\n"); 332 ret = -EPERM; 333 goto out; 334 } 335 336 if (--twl6040->power_count) 337 goto out; 338 339 if (gpio_is_valid(twl6040->audpwron)) { 340 /* use AUDPWRON line */ 341 gpio_set_value(twl6040->audpwron, 0); 342 343 /* power-down sequence latency */ 344 usleep_range(500, 700); 345 } else { 346 /* use manual power-down sequence */ 347 twl6040_power_down_manual(twl6040); 348 } 349 350 /* Set regmap to cache only and mark it as dirty */ 351 regcache_cache_only(twl6040->regmap, true); 352 regcache_mark_dirty(twl6040->regmap); 353 354 twl6040->sysclk_rate = 0; 355 356 if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) { 357 clk_disable_unprepare(twl6040->mclk); 358 twl6040->mclk_rate = 0; 359 } 360 361 clk_disable_unprepare(twl6040->clk32k); 362 } 363 364 out: 365 mutex_unlock(&twl6040->mutex); 366 return ret; 367 } 368 EXPORT_SYMBOL(twl6040_power); 369 370 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id, 371 unsigned int freq_in, unsigned int freq_out) 372 { 373 u8 hppllctl, lppllctl; 374 int ret = 0; 375 376 mutex_lock(&twl6040->mutex); 377 378 hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL); 379 lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); 380 381 /* Force full reconfiguration when switching between PLL */ 382 if (pll_id != twl6040->pll) { 383 twl6040->sysclk_rate = 0; 384 twl6040->mclk_rate = 0; 385 } 386 387 switch (pll_id) { 388 case TWL6040_SYSCLK_SEL_LPPLL: 389 /* low-power PLL divider */ 390 /* Change the sysclk configuration only if it has been canged */ 391 if (twl6040->sysclk_rate != freq_out) { 392 switch (freq_out) { 393 case 17640000: 394 lppllctl |= TWL6040_LPLLFIN; 395 break; 396 case 19200000: 397 lppllctl &= ~TWL6040_LPLLFIN; 398 break; 399 default: 400 dev_err(twl6040->dev, 401 "freq_out %d not supported\n", 402 freq_out); 403 ret = -EINVAL; 404 goto pll_out; 405 } 406 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 407 lppllctl); 408 } 409 410 /* The PLL in use has not been change, we can exit */ 411 if (twl6040->pll == pll_id) 412 break; 413 414 switch (freq_in) { 415 case 32768: 416 lppllctl |= TWL6040_LPLLENA; 417 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 418 lppllctl); 419 mdelay(5); 420 lppllctl &= ~TWL6040_HPLLSEL; 421 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 422 lppllctl); 423 hppllctl &= ~TWL6040_HPLLENA; 424 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, 425 hppllctl); 426 break; 427 default: 428 dev_err(twl6040->dev, 429 "freq_in %d not supported\n", freq_in); 430 ret = -EINVAL; 431 goto pll_out; 432 } 433 434 clk_disable_unprepare(twl6040->mclk); 435 break; 436 case TWL6040_SYSCLK_SEL_HPPLL: 437 /* high-performance PLL can provide only 19.2 MHz */ 438 if (freq_out != 19200000) { 439 dev_err(twl6040->dev, 440 "freq_out %d not supported\n", freq_out); 441 ret = -EINVAL; 442 goto pll_out; 443 } 444 445 if (twl6040->mclk_rate != freq_in) { 446 hppllctl &= ~TWL6040_MCLK_MSK; 447 448 switch (freq_in) { 449 case 12000000: 450 /* PLL enabled, active mode */ 451 hppllctl |= TWL6040_MCLK_12000KHZ | 452 TWL6040_HPLLENA; 453 break; 454 case 19200000: 455 /* PLL enabled, bypass mode */ 456 hppllctl |= TWL6040_MCLK_19200KHZ | 457 TWL6040_HPLLBP | TWL6040_HPLLENA; 458 break; 459 case 26000000: 460 /* PLL enabled, active mode */ 461 hppllctl |= TWL6040_MCLK_26000KHZ | 462 TWL6040_HPLLENA; 463 break; 464 case 38400000: 465 /* PLL enabled, bypass mode */ 466 hppllctl |= TWL6040_MCLK_38400KHZ | 467 TWL6040_HPLLBP | TWL6040_HPLLENA; 468 break; 469 default: 470 dev_err(twl6040->dev, 471 "freq_in %d not supported\n", freq_in); 472 ret = -EINVAL; 473 goto pll_out; 474 } 475 476 /* When switching to HPPLL, enable the mclk first */ 477 if (pll_id != twl6040->pll) 478 clk_prepare_enable(twl6040->mclk); 479 /* 480 * enable clock slicer to ensure input waveform is 481 * square 482 */ 483 hppllctl |= TWL6040_HPLLSQRENA; 484 485 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, 486 hppllctl); 487 usleep_range(500, 700); 488 lppllctl |= TWL6040_HPLLSEL; 489 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 490 lppllctl); 491 lppllctl &= ~TWL6040_LPLLENA; 492 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, 493 lppllctl); 494 495 twl6040->mclk_rate = freq_in; 496 } 497 break; 498 default: 499 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id); 500 ret = -EINVAL; 501 goto pll_out; 502 } 503 504 twl6040->sysclk_rate = freq_out; 505 twl6040->pll = pll_id; 506 507 pll_out: 508 mutex_unlock(&twl6040->mutex); 509 return ret; 510 } 511 EXPORT_SYMBOL(twl6040_set_pll); 512 513 int twl6040_get_pll(struct twl6040 *twl6040) 514 { 515 if (twl6040->power_count) 516 return twl6040->pll; 517 else 518 return -ENODEV; 519 } 520 EXPORT_SYMBOL(twl6040_get_pll); 521 522 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040) 523 { 524 return twl6040->sysclk_rate; 525 } 526 EXPORT_SYMBOL(twl6040_get_sysclk); 527 528 /* Get the combined status of the vibra control register */ 529 int twl6040_get_vibralr_status(struct twl6040 *twl6040) 530 { 531 unsigned int reg; 532 int ret; 533 u8 status; 534 535 ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, ®); 536 if (ret != 0) 537 return ret; 538 status = reg; 539 540 ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, ®); 541 if (ret != 0) 542 return ret; 543 status |= reg; 544 545 status &= (TWL6040_VIBENA | TWL6040_VIBSEL); 546 547 return status; 548 } 549 EXPORT_SYMBOL(twl6040_get_vibralr_status); 550 551 static struct resource twl6040_vibra_rsrc[] = { 552 { 553 .flags = IORESOURCE_IRQ, 554 }, 555 }; 556 557 static struct resource twl6040_codec_rsrc[] = { 558 { 559 .flags = IORESOURCE_IRQ, 560 }, 561 }; 562 563 static bool twl6040_readable_reg(struct device *dev, unsigned int reg) 564 { 565 /* Register 0 is not readable */ 566 if (!reg) 567 return false; 568 return true; 569 } 570 571 static bool twl6040_volatile_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_INTID: 577 case TWL6040_REG_LPPLLCTL: 578 case TWL6040_REG_HPPLLCTL: 579 case TWL6040_REG_STATUS: 580 return true; 581 default: 582 return false; 583 } 584 } 585 586 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg) 587 { 588 switch (reg) { 589 case TWL6040_REG_ASICID: 590 case TWL6040_REG_ASICREV: 591 case TWL6040_REG_STATUS: 592 return false; 593 default: 594 return true; 595 } 596 } 597 598 static const struct regmap_config twl6040_regmap_config = { 599 .reg_bits = 8, 600 .val_bits = 8, 601 602 .reg_defaults = twl6040_defaults, 603 .num_reg_defaults = ARRAY_SIZE(twl6040_defaults), 604 605 .max_register = TWL6040_REG_STATUS, /* 0x2e */ 606 607 .readable_reg = twl6040_readable_reg, 608 .volatile_reg = twl6040_volatile_reg, 609 .writeable_reg = twl6040_writeable_reg, 610 611 .cache_type = REGCACHE_RBTREE, 612 .use_single_rw = true, 613 }; 614 615 static const struct regmap_irq twl6040_irqs[] = { 616 { .reg_offset = 0, .mask = TWL6040_THINT, }, 617 { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, }, 618 { .reg_offset = 0, .mask = TWL6040_HOOKINT, }, 619 { .reg_offset = 0, .mask = TWL6040_HFINT, }, 620 { .reg_offset = 0, .mask = TWL6040_VIBINT, }, 621 { .reg_offset = 0, .mask = TWL6040_READYINT, }, 622 }; 623 624 static struct regmap_irq_chip twl6040_irq_chip = { 625 .name = "twl6040", 626 .irqs = twl6040_irqs, 627 .num_irqs = ARRAY_SIZE(twl6040_irqs), 628 629 .num_regs = 1, 630 .status_base = TWL6040_REG_INTID, 631 .mask_base = TWL6040_REG_INTMR, 632 }; 633 634 static int twl6040_probe(struct i2c_client *client, 635 const struct i2c_device_id *id) 636 { 637 struct device_node *node = client->dev.of_node; 638 struct twl6040 *twl6040; 639 struct mfd_cell *cell = NULL; 640 int irq, ret, children = 0; 641 642 if (!node) { 643 dev_err(&client->dev, "of node is missing\n"); 644 return -EINVAL; 645 } 646 647 /* In order to operate correctly we need valid interrupt config */ 648 if (!client->irq) { 649 dev_err(&client->dev, "Invalid IRQ configuration\n"); 650 return -EINVAL; 651 } 652 653 twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040), 654 GFP_KERNEL); 655 if (!twl6040) 656 return -ENOMEM; 657 658 twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config); 659 if (IS_ERR(twl6040->regmap)) 660 return PTR_ERR(twl6040->regmap); 661 662 i2c_set_clientdata(client, twl6040); 663 664 twl6040->clk32k = devm_clk_get(&client->dev, "clk32k"); 665 if (IS_ERR(twl6040->clk32k)) { 666 if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER) 667 return -EPROBE_DEFER; 668 dev_dbg(&client->dev, "clk32k is not handled\n"); 669 twl6040->clk32k = NULL; 670 } 671 672 twl6040->mclk = devm_clk_get(&client->dev, "mclk"); 673 if (IS_ERR(twl6040->mclk)) { 674 if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER) 675 return -EPROBE_DEFER; 676 dev_dbg(&client->dev, "mclk is not handled\n"); 677 twl6040->mclk = NULL; 678 } 679 680 twl6040->supplies[0].supply = "vio"; 681 twl6040->supplies[1].supply = "v2v1"; 682 ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES, 683 twl6040->supplies); 684 if (ret != 0) { 685 dev_err(&client->dev, "Failed to get supplies: %d\n", ret); 686 return ret; 687 } 688 689 ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies); 690 if (ret != 0) { 691 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret); 692 return ret; 693 } 694 695 twl6040->dev = &client->dev; 696 twl6040->irq = client->irq; 697 698 mutex_init(&twl6040->mutex); 699 init_completion(&twl6040->ready); 700 701 regmap_register_patch(twl6040->regmap, twl6040_patch, 702 ARRAY_SIZE(twl6040_patch)); 703 704 twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV); 705 if (twl6040->rev < 0) { 706 dev_err(&client->dev, "Failed to read revision register: %d\n", 707 twl6040->rev); 708 ret = twl6040->rev; 709 goto gpio_err; 710 } 711 712 /* ERRATA: Automatic power-up is not possible in ES1.0 */ 713 if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) 714 twl6040->audpwron = of_get_named_gpio(node, 715 "ti,audpwron-gpio", 0); 716 else 717 twl6040->audpwron = -EINVAL; 718 719 if (gpio_is_valid(twl6040->audpwron)) { 720 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron, 721 GPIOF_OUT_INIT_LOW, "audpwron"); 722 if (ret) 723 goto gpio_err; 724 725 /* Clear any pending interrupt */ 726 twl6040_reg_read(twl6040, TWL6040_REG_INTID); 727 } 728 729 ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT, 730 0, &twl6040_irq_chip, &twl6040->irq_data); 731 if (ret < 0) 732 goto gpio_err; 733 734 twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data, 735 TWL6040_IRQ_READY); 736 twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data, 737 TWL6040_IRQ_TH); 738 739 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL, 740 twl6040_readyint_handler, IRQF_ONESHOT, 741 "twl6040_irq_ready", twl6040); 742 if (ret) { 743 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret); 744 goto readyirq_err; 745 } 746 747 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL, 748 twl6040_thint_handler, IRQF_ONESHOT, 749 "twl6040_irq_th", twl6040); 750 if (ret) { 751 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret); 752 goto readyirq_err; 753 } 754 755 /* 756 * The main functionality of twl6040 to provide audio on OMAP4+ systems. 757 * We can add the ASoC codec child whenever this driver has been loaded. 758 */ 759 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG); 760 cell = &twl6040->cells[children]; 761 cell->name = "twl6040-codec"; 762 twl6040_codec_rsrc[0].start = irq; 763 twl6040_codec_rsrc[0].end = irq; 764 cell->resources = twl6040_codec_rsrc; 765 cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc); 766 children++; 767 768 /* Vibra input driver support */ 769 if (twl6040_has_vibra(node)) { 770 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB); 771 772 cell = &twl6040->cells[children]; 773 cell->name = "twl6040-vibra"; 774 twl6040_vibra_rsrc[0].start = irq; 775 twl6040_vibra_rsrc[0].end = irq; 776 cell->resources = twl6040_vibra_rsrc; 777 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc); 778 children++; 779 } 780 781 /* GPO support */ 782 cell = &twl6040->cells[children]; 783 cell->name = "twl6040-gpo"; 784 children++; 785 786 /* PDM clock support */ 787 cell = &twl6040->cells[children]; 788 cell->name = "twl6040-pdmclk"; 789 children++; 790 791 /* The chip is powered down so mark regmap to cache only and dirty */ 792 regcache_cache_only(twl6040->regmap, true); 793 regcache_mark_dirty(twl6040->regmap); 794 795 ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children, 796 NULL, 0, NULL); 797 if (ret) 798 goto readyirq_err; 799 800 return 0; 801 802 readyirq_err: 803 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data); 804 gpio_err: 805 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies); 806 return ret; 807 } 808 809 static int twl6040_remove(struct i2c_client *client) 810 { 811 struct twl6040 *twl6040 = i2c_get_clientdata(client); 812 813 if (twl6040->power_count) 814 twl6040_power(twl6040, 0); 815 816 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data); 817 818 mfd_remove_devices(&client->dev); 819 820 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies); 821 822 return 0; 823 } 824 825 static const struct i2c_device_id twl6040_i2c_id[] = { 826 { "twl6040", 0, }, 827 { "twl6041", 0, }, 828 { }, 829 }; 830 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id); 831 832 static struct i2c_driver twl6040_driver = { 833 .driver = { 834 .name = "twl6040", 835 }, 836 .probe = twl6040_probe, 837 .remove = twl6040_remove, 838 .id_table = twl6040_i2c_id, 839 }; 840 841 module_i2c_driver(twl6040_driver); 842 843 MODULE_DESCRIPTION("TWL6040 MFD"); 844 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); 845 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>"); 846 MODULE_LICENSE("GPL"); 847