1 /* 2 * Copyright (C) 2004 Texas Instruments, Inc. 3 * 4 * Some parts based tps65010.c: 5 * Copyright (C) 2004 Texas Instruments and 6 * Copyright (C) 2004-2005 David Brownell 7 * 8 * Some parts based on tlv320aic24.c: 9 * Copyright (C) by Kai Svahn <kai.svahn@nokia.com> 10 * 11 * Changes for interrupt handling and clean-up by 12 * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com> 13 * Cleanup and generalized support for voltage setting by 14 * Juha Yrjola 15 * Added support for controlling VCORE and regulator sleep states, 16 * Amit Kucheria <amit.kucheria@nokia.com> 17 * Copyright (C) 2005, 2006 Nokia Corporation 18 * 19 * This program is free software; you can redistribute it and/or modify 20 * it under the terms of the GNU General Public License as published by 21 * the Free Software Foundation; either version 2 of the License, or 22 * (at your option) any later version. 23 * 24 * This program is distributed in the hope that it will be useful, 25 * but WITHOUT ANY WARRANTY; without even the implied warranty of 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 27 * GNU General Public License for more details. 28 * 29 * You should have received a copy of the GNU General Public License 30 * along with this program; if not, write to the Free Software 31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 32 */ 33 34 #include <linux/module.h> 35 #include <linux/i2c.h> 36 #include <linux/interrupt.h> 37 #include <linux/sched.h> 38 #include <linux/mutex.h> 39 #include <linux/workqueue.h> 40 #include <linux/delay.h> 41 #include <linux/rtc.h> 42 #include <linux/bcd.h> 43 #include <linux/slab.h> 44 #include <linux/mfd/menelaus.h> 45 46 #include <asm/mach/irq.h> 47 48 #include <asm/gpio.h> 49 50 #define DRIVER_NAME "menelaus" 51 52 #define MENELAUS_I2C_ADDRESS 0x72 53 54 #define MENELAUS_REV 0x01 55 #define MENELAUS_VCORE_CTRL1 0x02 56 #define MENELAUS_VCORE_CTRL2 0x03 57 #define MENELAUS_VCORE_CTRL3 0x04 58 #define MENELAUS_VCORE_CTRL4 0x05 59 #define MENELAUS_VCORE_CTRL5 0x06 60 #define MENELAUS_DCDC_CTRL1 0x07 61 #define MENELAUS_DCDC_CTRL2 0x08 62 #define MENELAUS_DCDC_CTRL3 0x09 63 #define MENELAUS_LDO_CTRL1 0x0A 64 #define MENELAUS_LDO_CTRL2 0x0B 65 #define MENELAUS_LDO_CTRL3 0x0C 66 #define MENELAUS_LDO_CTRL4 0x0D 67 #define MENELAUS_LDO_CTRL5 0x0E 68 #define MENELAUS_LDO_CTRL6 0x0F 69 #define MENELAUS_LDO_CTRL7 0x10 70 #define MENELAUS_LDO_CTRL8 0x11 71 #define MENELAUS_SLEEP_CTRL1 0x12 72 #define MENELAUS_SLEEP_CTRL2 0x13 73 #define MENELAUS_DEVICE_OFF 0x14 74 #define MENELAUS_OSC_CTRL 0x15 75 #define MENELAUS_DETECT_CTRL 0x16 76 #define MENELAUS_INT_MASK1 0x17 77 #define MENELAUS_INT_MASK2 0x18 78 #define MENELAUS_INT_STATUS1 0x19 79 #define MENELAUS_INT_STATUS2 0x1A 80 #define MENELAUS_INT_ACK1 0x1B 81 #define MENELAUS_INT_ACK2 0x1C 82 #define MENELAUS_GPIO_CTRL 0x1D 83 #define MENELAUS_GPIO_IN 0x1E 84 #define MENELAUS_GPIO_OUT 0x1F 85 #define MENELAUS_BBSMS 0x20 86 #define MENELAUS_RTC_CTRL 0x21 87 #define MENELAUS_RTC_UPDATE 0x22 88 #define MENELAUS_RTC_SEC 0x23 89 #define MENELAUS_RTC_MIN 0x24 90 #define MENELAUS_RTC_HR 0x25 91 #define MENELAUS_RTC_DAY 0x26 92 #define MENELAUS_RTC_MON 0x27 93 #define MENELAUS_RTC_YR 0x28 94 #define MENELAUS_RTC_WKDAY 0x29 95 #define MENELAUS_RTC_AL_SEC 0x2A 96 #define MENELAUS_RTC_AL_MIN 0x2B 97 #define MENELAUS_RTC_AL_HR 0x2C 98 #define MENELAUS_RTC_AL_DAY 0x2D 99 #define MENELAUS_RTC_AL_MON 0x2E 100 #define MENELAUS_RTC_AL_YR 0x2F 101 #define MENELAUS_RTC_COMP_MSB 0x30 102 #define MENELAUS_RTC_COMP_LSB 0x31 103 #define MENELAUS_S1_PULL_EN 0x32 104 #define MENELAUS_S1_PULL_DIR 0x33 105 #define MENELAUS_S2_PULL_EN 0x34 106 #define MENELAUS_S2_PULL_DIR 0x35 107 #define MENELAUS_MCT_CTRL1 0x36 108 #define MENELAUS_MCT_CTRL2 0x37 109 #define MENELAUS_MCT_CTRL3 0x38 110 #define MENELAUS_MCT_PIN_ST 0x39 111 #define MENELAUS_DEBOUNCE1 0x3A 112 113 #define IH_MENELAUS_IRQS 12 114 #define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */ 115 #define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */ 116 #define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */ 117 #define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */ 118 #define MENELAUS_LOWBAT_IRQ 4 /* Low battery */ 119 #define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */ 120 #define MENELAUS_UVLO_IRQ 6 /* UVLO detect */ 121 #define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */ 122 #define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */ 123 #define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */ 124 #define MENELAUS_RTCERR_IRQ 10 /* RTC error */ 125 #define MENELAUS_PSHBTN_IRQ 11 /* Push button */ 126 #define MENELAUS_RESERVED12_IRQ 12 /* Reserved */ 127 #define MENELAUS_RESERVED13_IRQ 13 /* Reserved */ 128 #define MENELAUS_RESERVED14_IRQ 14 /* Reserved */ 129 #define MENELAUS_RESERVED15_IRQ 15 /* Reserved */ 130 131 /* VCORE_CTRL1 register */ 132 #define VCORE_CTRL1_BYP_COMP (1 << 5) 133 #define VCORE_CTRL1_HW_NSW (1 << 7) 134 135 /* GPIO_CTRL register */ 136 #define GPIO_CTRL_SLOTSELEN (1 << 5) 137 #define GPIO_CTRL_SLPCTLEN (1 << 6) 138 #define GPIO1_DIR_INPUT (1 << 0) 139 #define GPIO2_DIR_INPUT (1 << 1) 140 #define GPIO3_DIR_INPUT (1 << 2) 141 142 /* MCT_CTRL1 register */ 143 #define MCT_CTRL1_S1_CMD_OD (1 << 2) 144 #define MCT_CTRL1_S2_CMD_OD (1 << 3) 145 146 /* MCT_CTRL2 register */ 147 #define MCT_CTRL2_VS2_SEL_D0 (1 << 0) 148 #define MCT_CTRL2_VS2_SEL_D1 (1 << 1) 149 #define MCT_CTRL2_S1CD_BUFEN (1 << 4) 150 #define MCT_CTRL2_S2CD_BUFEN (1 << 5) 151 #define MCT_CTRL2_S1CD_DBEN (1 << 6) 152 #define MCT_CTRL2_S2CD_BEN (1 << 7) 153 154 /* MCT_CTRL3 register */ 155 #define MCT_CTRL3_SLOT1_EN (1 << 0) 156 #define MCT_CTRL3_SLOT2_EN (1 << 1) 157 #define MCT_CTRL3_S1_AUTO_EN (1 << 2) 158 #define MCT_CTRL3_S2_AUTO_EN (1 << 3) 159 160 /* MCT_PIN_ST register */ 161 #define MCT_PIN_ST_S1_CD_ST (1 << 0) 162 #define MCT_PIN_ST_S2_CD_ST (1 << 1) 163 164 static void menelaus_work(struct work_struct *_menelaus); 165 166 struct menelaus_chip { 167 struct mutex lock; 168 struct i2c_client *client; 169 struct work_struct work; 170 #ifdef CONFIG_RTC_DRV_TWL92330 171 struct rtc_device *rtc; 172 u8 rtc_control; 173 unsigned uie:1; 174 #endif 175 unsigned vcore_hw_mode:1; 176 u8 mask1, mask2; 177 void (*handlers[16])(struct menelaus_chip *); 178 void (*mmc_callback)(void *data, u8 mask); 179 void *mmc_callback_data; 180 }; 181 182 static struct menelaus_chip *the_menelaus; 183 184 static int menelaus_write_reg(int reg, u8 value) 185 { 186 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value); 187 188 if (val < 0) { 189 pr_err(DRIVER_NAME ": write error"); 190 return val; 191 } 192 193 return 0; 194 } 195 196 static int menelaus_read_reg(int reg) 197 { 198 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg); 199 200 if (val < 0) 201 pr_err(DRIVER_NAME ": read error"); 202 203 return val; 204 } 205 206 static int menelaus_enable_irq(int irq) 207 { 208 if (irq > 7) { 209 irq -= 8; 210 the_menelaus->mask2 &= ~(1 << irq); 211 return menelaus_write_reg(MENELAUS_INT_MASK2, 212 the_menelaus->mask2); 213 } else { 214 the_menelaus->mask1 &= ~(1 << irq); 215 return menelaus_write_reg(MENELAUS_INT_MASK1, 216 the_menelaus->mask1); 217 } 218 } 219 220 static int menelaus_disable_irq(int irq) 221 { 222 if (irq > 7) { 223 irq -= 8; 224 the_menelaus->mask2 |= (1 << irq); 225 return menelaus_write_reg(MENELAUS_INT_MASK2, 226 the_menelaus->mask2); 227 } else { 228 the_menelaus->mask1 |= (1 << irq); 229 return menelaus_write_reg(MENELAUS_INT_MASK1, 230 the_menelaus->mask1); 231 } 232 } 233 234 static int menelaus_ack_irq(int irq) 235 { 236 if (irq > 7) 237 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8)); 238 else 239 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq); 240 } 241 242 /* Adds a handler for an interrupt. Does not run in interrupt context */ 243 static int menelaus_add_irq_work(int irq, 244 void (*handler)(struct menelaus_chip *)) 245 { 246 int ret = 0; 247 248 mutex_lock(&the_menelaus->lock); 249 the_menelaus->handlers[irq] = handler; 250 ret = menelaus_enable_irq(irq); 251 mutex_unlock(&the_menelaus->lock); 252 253 return ret; 254 } 255 256 /* Removes handler for an interrupt */ 257 static int menelaus_remove_irq_work(int irq) 258 { 259 int ret = 0; 260 261 mutex_lock(&the_menelaus->lock); 262 ret = menelaus_disable_irq(irq); 263 the_menelaus->handlers[irq] = NULL; 264 mutex_unlock(&the_menelaus->lock); 265 266 return ret; 267 } 268 269 /* 270 * Gets scheduled when a card detect interrupt happens. Note that in some cases 271 * this line is wired to card cover switch rather than the card detect switch 272 * in each slot. In this case the cards are not seen by menelaus. 273 * FIXME: Add handling for D1 too 274 */ 275 static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw) 276 { 277 int reg; 278 unsigned char card_mask = 0; 279 280 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST); 281 if (reg < 0) 282 return; 283 284 if (!(reg & 0x1)) 285 card_mask |= MCT_PIN_ST_S1_CD_ST; 286 287 if (!(reg & 0x2)) 288 card_mask |= MCT_PIN_ST_S2_CD_ST; 289 290 if (menelaus_hw->mmc_callback) 291 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data, 292 card_mask); 293 } 294 295 /* 296 * Toggles the MMC slots between open-drain and push-pull mode. 297 */ 298 int menelaus_set_mmc_opendrain(int slot, int enable) 299 { 300 int ret, val; 301 302 if (slot != 1 && slot != 2) 303 return -EINVAL; 304 mutex_lock(&the_menelaus->lock); 305 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1); 306 if (ret < 0) { 307 mutex_unlock(&the_menelaus->lock); 308 return ret; 309 } 310 val = ret; 311 if (slot == 1) { 312 if (enable) 313 val |= MCT_CTRL1_S1_CMD_OD; 314 else 315 val &= ~MCT_CTRL1_S1_CMD_OD; 316 } else { 317 if (enable) 318 val |= MCT_CTRL1_S2_CMD_OD; 319 else 320 val &= ~MCT_CTRL1_S2_CMD_OD; 321 } 322 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val); 323 mutex_unlock(&the_menelaus->lock); 324 325 return ret; 326 } 327 EXPORT_SYMBOL(menelaus_set_mmc_opendrain); 328 329 int menelaus_set_slot_sel(int enable) 330 { 331 int ret; 332 333 mutex_lock(&the_menelaus->lock); 334 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); 335 if (ret < 0) 336 goto out; 337 ret |= GPIO2_DIR_INPUT; 338 if (enable) 339 ret |= GPIO_CTRL_SLOTSELEN; 340 else 341 ret &= ~GPIO_CTRL_SLOTSELEN; 342 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); 343 out: 344 mutex_unlock(&the_menelaus->lock); 345 return ret; 346 } 347 EXPORT_SYMBOL(menelaus_set_slot_sel); 348 349 int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en) 350 { 351 int ret, val; 352 353 if (slot != 1 && slot != 2) 354 return -EINVAL; 355 if (power >= 3) 356 return -EINVAL; 357 358 mutex_lock(&the_menelaus->lock); 359 360 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2); 361 if (ret < 0) 362 goto out; 363 val = ret; 364 if (slot == 1) { 365 if (cd_en) 366 val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN; 367 else 368 val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN); 369 } else { 370 if (cd_en) 371 val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN; 372 else 373 val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN); 374 } 375 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val); 376 if (ret < 0) 377 goto out; 378 379 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3); 380 if (ret < 0) 381 goto out; 382 val = ret; 383 if (slot == 1) { 384 if (enable) 385 val |= MCT_CTRL3_SLOT1_EN; 386 else 387 val &= ~MCT_CTRL3_SLOT1_EN; 388 } else { 389 int b; 390 391 if (enable) 392 val |= MCT_CTRL3_SLOT2_EN; 393 else 394 val &= ~MCT_CTRL3_SLOT2_EN; 395 b = menelaus_read_reg(MENELAUS_MCT_CTRL2); 396 b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1); 397 b |= power; 398 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b); 399 if (ret < 0) 400 goto out; 401 } 402 /* Disable autonomous shutdown */ 403 val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN); 404 ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val); 405 out: 406 mutex_unlock(&the_menelaus->lock); 407 return ret; 408 } 409 EXPORT_SYMBOL(menelaus_set_mmc_slot); 410 411 int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask), 412 void *data) 413 { 414 int ret = 0; 415 416 the_menelaus->mmc_callback_data = data; 417 the_menelaus->mmc_callback = callback; 418 ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ, 419 menelaus_mmc_cd_work); 420 if (ret < 0) 421 return ret; 422 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ, 423 menelaus_mmc_cd_work); 424 if (ret < 0) 425 return ret; 426 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ, 427 menelaus_mmc_cd_work); 428 if (ret < 0) 429 return ret; 430 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ, 431 menelaus_mmc_cd_work); 432 433 return ret; 434 } 435 EXPORT_SYMBOL(menelaus_register_mmc_callback); 436 437 void menelaus_unregister_mmc_callback(void) 438 { 439 menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ); 440 menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ); 441 menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ); 442 menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ); 443 444 the_menelaus->mmc_callback = NULL; 445 the_menelaus->mmc_callback_data = 0; 446 } 447 EXPORT_SYMBOL(menelaus_unregister_mmc_callback); 448 449 struct menelaus_vtg { 450 const char *name; 451 u8 vtg_reg; 452 u8 vtg_shift; 453 u8 vtg_bits; 454 u8 mode_reg; 455 }; 456 457 struct menelaus_vtg_value { 458 u16 vtg; 459 u16 val; 460 }; 461 462 static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV, 463 int vtg_val, int mode) 464 { 465 int val, ret; 466 struct i2c_client *c = the_menelaus->client; 467 468 mutex_lock(&the_menelaus->lock); 469 if (vtg == 0) 470 goto set_voltage; 471 472 ret = menelaus_read_reg(vtg->vtg_reg); 473 if (ret < 0) 474 goto out; 475 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift); 476 val |= vtg_val << vtg->vtg_shift; 477 478 dev_dbg(&c->dev, "Setting voltage '%s'" 479 "to %d mV (reg 0x%02x, val 0x%02x)\n", 480 vtg->name, mV, vtg->vtg_reg, val); 481 482 ret = menelaus_write_reg(vtg->vtg_reg, val); 483 if (ret < 0) 484 goto out; 485 set_voltage: 486 ret = menelaus_write_reg(vtg->mode_reg, mode); 487 out: 488 mutex_unlock(&the_menelaus->lock); 489 if (ret == 0) { 490 /* Wait for voltage to stabilize */ 491 msleep(1); 492 } 493 return ret; 494 } 495 496 static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl, 497 int n) 498 { 499 int i; 500 501 for (i = 0; i < n; i++, tbl++) 502 if (tbl->vtg == vtg) 503 return tbl->val; 504 return -EINVAL; 505 } 506 507 /* 508 * Vcore can be programmed in two ways: 509 * SW-controlled: Required voltage is programmed into VCORE_CTRL1 510 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3 511 * and VCORE_CTRL4 512 * 513 * Call correct 'set' function accordingly 514 */ 515 516 static const struct menelaus_vtg_value vcore_values[] = { 517 { 1000, 0 }, 518 { 1025, 1 }, 519 { 1050, 2 }, 520 { 1075, 3 }, 521 { 1100, 4 }, 522 { 1125, 5 }, 523 { 1150, 6 }, 524 { 1175, 7 }, 525 { 1200, 8 }, 526 { 1225, 9 }, 527 { 1250, 10 }, 528 { 1275, 11 }, 529 { 1300, 12 }, 530 { 1325, 13 }, 531 { 1350, 14 }, 532 { 1375, 15 }, 533 { 1400, 16 }, 534 { 1425, 17 }, 535 { 1450, 18 }, 536 }; 537 538 int menelaus_set_vcore_sw(unsigned int mV) 539 { 540 int val, ret; 541 struct i2c_client *c = the_menelaus->client; 542 543 val = menelaus_get_vtg_value(mV, vcore_values, 544 ARRAY_SIZE(vcore_values)); 545 if (val < 0) 546 return -EINVAL; 547 548 dev_dbg(&c->dev, "Setting VCORE to %d mV (val 0x%02x)\n", mV, val); 549 550 /* Set SW mode and the voltage in one go. */ 551 mutex_lock(&the_menelaus->lock); 552 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val); 553 if (ret == 0) 554 the_menelaus->vcore_hw_mode = 0; 555 mutex_unlock(&the_menelaus->lock); 556 msleep(1); 557 558 return ret; 559 } 560 561 int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV) 562 { 563 int fval, rval, val, ret; 564 struct i2c_client *c = the_menelaus->client; 565 566 rval = menelaus_get_vtg_value(roof_mV, vcore_values, 567 ARRAY_SIZE(vcore_values)); 568 if (rval < 0) 569 return -EINVAL; 570 fval = menelaus_get_vtg_value(floor_mV, vcore_values, 571 ARRAY_SIZE(vcore_values)); 572 if (fval < 0) 573 return -EINVAL; 574 575 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n", 576 floor_mV, roof_mV); 577 578 mutex_lock(&the_menelaus->lock); 579 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval); 580 if (ret < 0) 581 goto out; 582 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval); 583 if (ret < 0) 584 goto out; 585 if (!the_menelaus->vcore_hw_mode) { 586 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1); 587 /* HW mode, turn OFF byte comparator */ 588 val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP); 589 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val); 590 the_menelaus->vcore_hw_mode = 1; 591 } 592 msleep(1); 593 out: 594 mutex_unlock(&the_menelaus->lock); 595 return ret; 596 } 597 598 static const struct menelaus_vtg vmem_vtg = { 599 .name = "VMEM", 600 .vtg_reg = MENELAUS_LDO_CTRL1, 601 .vtg_shift = 0, 602 .vtg_bits = 2, 603 .mode_reg = MENELAUS_LDO_CTRL3, 604 }; 605 606 static const struct menelaus_vtg_value vmem_values[] = { 607 { 1500, 0 }, 608 { 1800, 1 }, 609 { 1900, 2 }, 610 { 2500, 3 }, 611 }; 612 613 int menelaus_set_vmem(unsigned int mV) 614 { 615 int val; 616 617 if (mV == 0) 618 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0); 619 620 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values)); 621 if (val < 0) 622 return -EINVAL; 623 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02); 624 } 625 EXPORT_SYMBOL(menelaus_set_vmem); 626 627 static const struct menelaus_vtg vio_vtg = { 628 .name = "VIO", 629 .vtg_reg = MENELAUS_LDO_CTRL1, 630 .vtg_shift = 2, 631 .vtg_bits = 2, 632 .mode_reg = MENELAUS_LDO_CTRL4, 633 }; 634 635 static const struct menelaus_vtg_value vio_values[] = { 636 { 1500, 0 }, 637 { 1800, 1 }, 638 { 2500, 2 }, 639 { 2800, 3 }, 640 }; 641 642 int menelaus_set_vio(unsigned int mV) 643 { 644 int val; 645 646 if (mV == 0) 647 return menelaus_set_voltage(&vio_vtg, 0, 0, 0); 648 649 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values)); 650 if (val < 0) 651 return -EINVAL; 652 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02); 653 } 654 EXPORT_SYMBOL(menelaus_set_vio); 655 656 static const struct menelaus_vtg_value vdcdc_values[] = { 657 { 1500, 0 }, 658 { 1800, 1 }, 659 { 2000, 2 }, 660 { 2200, 3 }, 661 { 2400, 4 }, 662 { 2800, 5 }, 663 { 3000, 6 }, 664 { 3300, 7 }, 665 }; 666 667 static const struct menelaus_vtg vdcdc2_vtg = { 668 .name = "VDCDC2", 669 .vtg_reg = MENELAUS_DCDC_CTRL1, 670 .vtg_shift = 0, 671 .vtg_bits = 3, 672 .mode_reg = MENELAUS_DCDC_CTRL2, 673 }; 674 675 static const struct menelaus_vtg vdcdc3_vtg = { 676 .name = "VDCDC3", 677 .vtg_reg = MENELAUS_DCDC_CTRL1, 678 .vtg_shift = 3, 679 .vtg_bits = 3, 680 .mode_reg = MENELAUS_DCDC_CTRL3, 681 }; 682 683 int menelaus_set_vdcdc(int dcdc, unsigned int mV) 684 { 685 const struct menelaus_vtg *vtg; 686 int val; 687 688 if (dcdc != 2 && dcdc != 3) 689 return -EINVAL; 690 if (dcdc == 2) 691 vtg = &vdcdc2_vtg; 692 else 693 vtg = &vdcdc3_vtg; 694 695 if (mV == 0) 696 return menelaus_set_voltage(vtg, 0, 0, 0); 697 698 val = menelaus_get_vtg_value(mV, vdcdc_values, 699 ARRAY_SIZE(vdcdc_values)); 700 if (val < 0) 701 return -EINVAL; 702 return menelaus_set_voltage(vtg, mV, val, 0x03); 703 } 704 705 static const struct menelaus_vtg_value vmmc_values[] = { 706 { 1850, 0 }, 707 { 2800, 1 }, 708 { 3000, 2 }, 709 { 3100, 3 }, 710 }; 711 712 static const struct menelaus_vtg vmmc_vtg = { 713 .name = "VMMC", 714 .vtg_reg = MENELAUS_LDO_CTRL1, 715 .vtg_shift = 6, 716 .vtg_bits = 2, 717 .mode_reg = MENELAUS_LDO_CTRL7, 718 }; 719 720 int menelaus_set_vmmc(unsigned int mV) 721 { 722 int val; 723 724 if (mV == 0) 725 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0); 726 727 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values)); 728 if (val < 0) 729 return -EINVAL; 730 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02); 731 } 732 EXPORT_SYMBOL(menelaus_set_vmmc); 733 734 735 static const struct menelaus_vtg_value vaux_values[] = { 736 { 1500, 0 }, 737 { 1800, 1 }, 738 { 2500, 2 }, 739 { 2800, 3 }, 740 }; 741 742 static const struct menelaus_vtg vaux_vtg = { 743 .name = "VAUX", 744 .vtg_reg = MENELAUS_LDO_CTRL1, 745 .vtg_shift = 4, 746 .vtg_bits = 2, 747 .mode_reg = MENELAUS_LDO_CTRL6, 748 }; 749 750 int menelaus_set_vaux(unsigned int mV) 751 { 752 int val; 753 754 if (mV == 0) 755 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0); 756 757 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values)); 758 if (val < 0) 759 return -EINVAL; 760 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02); 761 } 762 EXPORT_SYMBOL(menelaus_set_vaux); 763 764 int menelaus_get_slot_pin_states(void) 765 { 766 return menelaus_read_reg(MENELAUS_MCT_PIN_ST); 767 } 768 EXPORT_SYMBOL(menelaus_get_slot_pin_states); 769 770 int menelaus_set_regulator_sleep(int enable, u32 val) 771 { 772 int t, ret; 773 struct i2c_client *c = the_menelaus->client; 774 775 mutex_lock(&the_menelaus->lock); 776 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val); 777 if (ret < 0) 778 goto out; 779 780 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val); 781 782 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); 783 if (ret < 0) 784 goto out; 785 t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT); 786 if (enable) 787 ret |= t; 788 else 789 ret &= ~t; 790 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); 791 out: 792 mutex_unlock(&the_menelaus->lock); 793 return ret; 794 } 795 796 /*-----------------------------------------------------------------------*/ 797 798 /* Handles Menelaus interrupts. Does not run in interrupt context */ 799 static void menelaus_work(struct work_struct *_menelaus) 800 { 801 struct menelaus_chip *menelaus = 802 container_of(_menelaus, struct menelaus_chip, work); 803 void (*handler)(struct menelaus_chip *menelaus); 804 805 while (1) { 806 unsigned isr; 807 808 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2) 809 & ~menelaus->mask2) << 8; 810 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1) 811 & ~menelaus->mask1; 812 if (!isr) 813 break; 814 815 while (isr) { 816 int irq = fls(isr) - 1; 817 isr &= ~(1 << irq); 818 819 mutex_lock(&menelaus->lock); 820 menelaus_disable_irq(irq); 821 menelaus_ack_irq(irq); 822 handler = menelaus->handlers[irq]; 823 if (handler) 824 handler(menelaus); 825 menelaus_enable_irq(irq); 826 mutex_unlock(&menelaus->lock); 827 } 828 } 829 enable_irq(menelaus->client->irq); 830 } 831 832 /* 833 * We cannot use I2C in interrupt context, so we just schedule work. 834 */ 835 static irqreturn_t menelaus_irq(int irq, void *_menelaus) 836 { 837 struct menelaus_chip *menelaus = _menelaus; 838 839 disable_irq_nosync(irq); 840 (void)schedule_work(&menelaus->work); 841 842 return IRQ_HANDLED; 843 } 844 845 /*-----------------------------------------------------------------------*/ 846 847 /* 848 * The RTC needs to be set once, then it runs on backup battery power. 849 * It supports alarms, including system wake alarms (from some modes); 850 * and 1/second IRQs if requested. 851 */ 852 #ifdef CONFIG_RTC_DRV_TWL92330 853 854 #define RTC_CTRL_RTC_EN (1 << 0) 855 #define RTC_CTRL_AL_EN (1 << 1) 856 #define RTC_CTRL_MODE12 (1 << 2) 857 #define RTC_CTRL_EVERY_MASK (3 << 3) 858 #define RTC_CTRL_EVERY_SEC (0 << 3) 859 #define RTC_CTRL_EVERY_MIN (1 << 3) 860 #define RTC_CTRL_EVERY_HR (2 << 3) 861 #define RTC_CTRL_EVERY_DAY (3 << 3) 862 863 #define RTC_UPDATE_EVERY 0x08 864 865 #define RTC_HR_PM (1 << 7) 866 867 static void menelaus_to_time(char *regs, struct rtc_time *t) 868 { 869 t->tm_sec = bcd2bin(regs[0]); 870 t->tm_min = bcd2bin(regs[1]); 871 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { 872 t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1; 873 if (regs[2] & RTC_HR_PM) 874 t->tm_hour += 12; 875 } else 876 t->tm_hour = bcd2bin(regs[2] & 0x3f); 877 t->tm_mday = bcd2bin(regs[3]); 878 t->tm_mon = bcd2bin(regs[4]) - 1; 879 t->tm_year = bcd2bin(regs[5]) + 100; 880 } 881 882 static int time_to_menelaus(struct rtc_time *t, int regnum) 883 { 884 int hour, status; 885 886 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec)); 887 if (status < 0) 888 goto fail; 889 890 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min)); 891 if (status < 0) 892 goto fail; 893 894 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { 895 hour = t->tm_hour + 1; 896 if (hour > 12) 897 hour = RTC_HR_PM | bin2bcd(hour - 12); 898 else 899 hour = bin2bcd(hour); 900 } else 901 hour = bin2bcd(t->tm_hour); 902 status = menelaus_write_reg(regnum++, hour); 903 if (status < 0) 904 goto fail; 905 906 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday)); 907 if (status < 0) 908 goto fail; 909 910 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1)); 911 if (status < 0) 912 goto fail; 913 914 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100)); 915 if (status < 0) 916 goto fail; 917 918 return 0; 919 fail: 920 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n", 921 --regnum, status); 922 return status; 923 } 924 925 static int menelaus_read_time(struct device *dev, struct rtc_time *t) 926 { 927 struct i2c_msg msg[2]; 928 char regs[7]; 929 int status; 930 931 /* block read date and time registers */ 932 regs[0] = MENELAUS_RTC_SEC; 933 934 msg[0].addr = MENELAUS_I2C_ADDRESS; 935 msg[0].flags = 0; 936 msg[0].len = 1; 937 msg[0].buf = regs; 938 939 msg[1].addr = MENELAUS_I2C_ADDRESS; 940 msg[1].flags = I2C_M_RD; 941 msg[1].len = sizeof(regs); 942 msg[1].buf = regs; 943 944 status = i2c_transfer(the_menelaus->client->adapter, msg, 2); 945 if (status != 2) { 946 dev_err(dev, "%s error %d\n", "read", status); 947 return -EIO; 948 } 949 950 menelaus_to_time(regs, t); 951 t->tm_wday = bcd2bin(regs[6]); 952 953 return 0; 954 } 955 956 static int menelaus_set_time(struct device *dev, struct rtc_time *t) 957 { 958 int status; 959 960 /* write date and time registers */ 961 status = time_to_menelaus(t, MENELAUS_RTC_SEC); 962 if (status < 0) 963 return status; 964 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday)); 965 if (status < 0) { 966 dev_err(&the_menelaus->client->dev, "rtc write reg %02x " 967 "err %d\n", MENELAUS_RTC_WKDAY, status); 968 return status; 969 } 970 971 /* now commit the write */ 972 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY); 973 if (status < 0) 974 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n", 975 status); 976 977 return 0; 978 } 979 980 static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w) 981 { 982 struct i2c_msg msg[2]; 983 char regs[6]; 984 int status; 985 986 /* block read alarm registers */ 987 regs[0] = MENELAUS_RTC_AL_SEC; 988 989 msg[0].addr = MENELAUS_I2C_ADDRESS; 990 msg[0].flags = 0; 991 msg[0].len = 1; 992 msg[0].buf = regs; 993 994 msg[1].addr = MENELAUS_I2C_ADDRESS; 995 msg[1].flags = I2C_M_RD; 996 msg[1].len = sizeof(regs); 997 msg[1].buf = regs; 998 999 status = i2c_transfer(the_menelaus->client->adapter, msg, 2); 1000 if (status != 2) { 1001 dev_err(dev, "%s error %d\n", "alarm read", status); 1002 return -EIO; 1003 } 1004 1005 menelaus_to_time(regs, &w->time); 1006 1007 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN); 1008 1009 /* NOTE we *could* check if actually pending... */ 1010 w->pending = 0; 1011 1012 return 0; 1013 } 1014 1015 static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w) 1016 { 1017 int status; 1018 1019 if (the_menelaus->client->irq <= 0 && w->enabled) 1020 return -ENODEV; 1021 1022 /* clear previous alarm enable */ 1023 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) { 1024 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; 1025 status = menelaus_write_reg(MENELAUS_RTC_CTRL, 1026 the_menelaus->rtc_control); 1027 if (status < 0) 1028 return status; 1029 } 1030 1031 /* write alarm registers */ 1032 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC); 1033 if (status < 0) 1034 return status; 1035 1036 /* enable alarm if requested */ 1037 if (w->enabled) { 1038 the_menelaus->rtc_control |= RTC_CTRL_AL_EN; 1039 status = menelaus_write_reg(MENELAUS_RTC_CTRL, 1040 the_menelaus->rtc_control); 1041 } 1042 1043 return status; 1044 } 1045 1046 #ifdef CONFIG_RTC_INTF_DEV 1047 1048 static void menelaus_rtc_update_work(struct menelaus_chip *m) 1049 { 1050 /* report 1/sec update */ 1051 local_irq_disable(); 1052 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF); 1053 local_irq_enable(); 1054 } 1055 1056 static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg) 1057 { 1058 int status; 1059 1060 if (the_menelaus->client->irq <= 0) 1061 return -ENOIOCTLCMD; 1062 1063 switch (cmd) { 1064 /* alarm IRQ */ 1065 case RTC_AIE_ON: 1066 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) 1067 return 0; 1068 the_menelaus->rtc_control |= RTC_CTRL_AL_EN; 1069 break; 1070 case RTC_AIE_OFF: 1071 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN)) 1072 return 0; 1073 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; 1074 break; 1075 /* 1/second "update" IRQ */ 1076 case RTC_UIE_ON: 1077 if (the_menelaus->uie) 1078 return 0; 1079 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); 1080 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ, 1081 menelaus_rtc_update_work); 1082 if (status == 0) 1083 the_menelaus->uie = 1; 1084 return status; 1085 case RTC_UIE_OFF: 1086 if (!the_menelaus->uie) 1087 return 0; 1088 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); 1089 if (status == 0) 1090 the_menelaus->uie = 0; 1091 return status; 1092 default: 1093 return -ENOIOCTLCMD; 1094 } 1095 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); 1096 } 1097 1098 #else 1099 #define menelaus_ioctl NULL 1100 #endif 1101 1102 /* REVISIT no compensation register support ... */ 1103 1104 static const struct rtc_class_ops menelaus_rtc_ops = { 1105 .ioctl = menelaus_ioctl, 1106 .read_time = menelaus_read_time, 1107 .set_time = menelaus_set_time, 1108 .read_alarm = menelaus_read_alarm, 1109 .set_alarm = menelaus_set_alarm, 1110 }; 1111 1112 static void menelaus_rtc_alarm_work(struct menelaus_chip *m) 1113 { 1114 /* report alarm */ 1115 local_irq_disable(); 1116 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF); 1117 local_irq_enable(); 1118 1119 /* then disable it; alarms are oneshot */ 1120 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; 1121 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); 1122 } 1123 1124 static inline void menelaus_rtc_init(struct menelaus_chip *m) 1125 { 1126 int alarm = (m->client->irq > 0); 1127 1128 /* assume 32KDETEN pin is pulled high */ 1129 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) { 1130 dev_dbg(&m->client->dev, "no 32k oscillator\n"); 1131 return; 1132 } 1133 1134 /* support RTC alarm; it can issue wakeups */ 1135 if (alarm) { 1136 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ, 1137 menelaus_rtc_alarm_work) < 0) { 1138 dev_err(&m->client->dev, "can't handle RTC alarm\n"); 1139 return; 1140 } 1141 device_init_wakeup(&m->client->dev, 1); 1142 } 1143 1144 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */ 1145 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL); 1146 if (!(m->rtc_control & RTC_CTRL_RTC_EN) 1147 || (m->rtc_control & RTC_CTRL_AL_EN) 1148 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) { 1149 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) { 1150 dev_warn(&m->client->dev, "rtc clock needs setting\n"); 1151 m->rtc_control |= RTC_CTRL_RTC_EN; 1152 } 1153 m->rtc_control &= ~RTC_CTRL_EVERY_MASK; 1154 m->rtc_control &= ~RTC_CTRL_AL_EN; 1155 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control); 1156 } 1157 1158 m->rtc = rtc_device_register(DRIVER_NAME, 1159 &m->client->dev, 1160 &menelaus_rtc_ops, THIS_MODULE); 1161 if (IS_ERR(m->rtc)) { 1162 if (alarm) { 1163 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ); 1164 device_init_wakeup(&m->client->dev, 0); 1165 } 1166 dev_err(&m->client->dev, "can't register RTC: %d\n", 1167 (int) PTR_ERR(m->rtc)); 1168 the_menelaus->rtc = NULL; 1169 } 1170 } 1171 1172 #else 1173 1174 static inline void menelaus_rtc_init(struct menelaus_chip *m) 1175 { 1176 /* nothing */ 1177 } 1178 1179 #endif 1180 1181 /*-----------------------------------------------------------------------*/ 1182 1183 static struct i2c_driver menelaus_i2c_driver; 1184 1185 static int menelaus_probe(struct i2c_client *client, 1186 const struct i2c_device_id *id) 1187 { 1188 struct menelaus_chip *menelaus; 1189 int rev = 0, val; 1190 int err = 0; 1191 struct menelaus_platform_data *menelaus_pdata = 1192 client->dev.platform_data; 1193 1194 if (the_menelaus) { 1195 dev_dbg(&client->dev, "only one %s for now\n", 1196 DRIVER_NAME); 1197 return -ENODEV; 1198 } 1199 1200 menelaus = kzalloc(sizeof *menelaus, GFP_KERNEL); 1201 if (!menelaus) 1202 return -ENOMEM; 1203 1204 i2c_set_clientdata(client, menelaus); 1205 1206 the_menelaus = menelaus; 1207 menelaus->client = client; 1208 1209 /* If a true probe check the device */ 1210 rev = menelaus_read_reg(MENELAUS_REV); 1211 if (rev < 0) { 1212 pr_err(DRIVER_NAME ": device not found"); 1213 err = -ENODEV; 1214 goto fail1; 1215 } 1216 1217 /* Ack and disable all Menelaus interrupts */ 1218 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff); 1219 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff); 1220 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff); 1221 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff); 1222 menelaus->mask1 = 0xff; 1223 menelaus->mask2 = 0xff; 1224 1225 /* Set output buffer strengths */ 1226 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73); 1227 1228 if (client->irq > 0) { 1229 err = request_irq(client->irq, menelaus_irq, 0, 1230 DRIVER_NAME, menelaus); 1231 if (err) { 1232 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", 1233 client->irq, err); 1234 goto fail1; 1235 } 1236 } 1237 1238 mutex_init(&menelaus->lock); 1239 INIT_WORK(&menelaus->work, menelaus_work); 1240 1241 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f); 1242 1243 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1); 1244 if (val < 0) 1245 goto fail2; 1246 if (val & (1 << 7)) 1247 menelaus->vcore_hw_mode = 1; 1248 else 1249 menelaus->vcore_hw_mode = 0; 1250 1251 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) { 1252 err = menelaus_pdata->late_init(&client->dev); 1253 if (err < 0) 1254 goto fail2; 1255 } 1256 1257 menelaus_rtc_init(menelaus); 1258 1259 return 0; 1260 fail2: 1261 free_irq(client->irq, menelaus); 1262 flush_work(&menelaus->work); 1263 fail1: 1264 kfree(menelaus); 1265 return err; 1266 } 1267 1268 static int __exit menelaus_remove(struct i2c_client *client) 1269 { 1270 struct menelaus_chip *menelaus = i2c_get_clientdata(client); 1271 1272 free_irq(client->irq, menelaus); 1273 flush_work(&menelaus->work); 1274 kfree(menelaus); 1275 the_menelaus = NULL; 1276 return 0; 1277 } 1278 1279 static const struct i2c_device_id menelaus_id[] = { 1280 { "menelaus", 0 }, 1281 { } 1282 }; 1283 MODULE_DEVICE_TABLE(i2c, menelaus_id); 1284 1285 static struct i2c_driver menelaus_i2c_driver = { 1286 .driver = { 1287 .name = DRIVER_NAME, 1288 }, 1289 .probe = menelaus_probe, 1290 .remove = __exit_p(menelaus_remove), 1291 .id_table = menelaus_id, 1292 }; 1293 1294 static int __init menelaus_init(void) 1295 { 1296 int res; 1297 1298 res = i2c_add_driver(&menelaus_i2c_driver); 1299 if (res < 0) { 1300 pr_err(DRIVER_NAME ": driver registration failed\n"); 1301 return res; 1302 } 1303 1304 return 0; 1305 } 1306 1307 static void __exit menelaus_exit(void) 1308 { 1309 i2c_del_driver(&menelaus_i2c_driver); 1310 1311 /* FIXME: Shutdown menelaus parts that can be shut down */ 1312 } 1313 1314 MODULE_AUTHOR("Texas Instruments, Inc. (and others)"); 1315 MODULE_DESCRIPTION("I2C interface for Menelaus."); 1316 MODULE_LICENSE("GPL"); 1317 1318 module_init(menelaus_init); 1319 module_exit(menelaus_exit); 1320