1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved. 3 */ 4 5 #include <linux/module.h> 6 #include <linux/platform_device.h> 7 #include <linux/kernel.h> 8 #include <linux/interrupt.h> 9 #include <linux/slab.h> 10 #include <linux/input.h> 11 #include <linux/bitops.h> 12 #include <linux/delay.h> 13 #include <linux/mutex.h> 14 #include <linux/regmap.h> 15 #include <linux/of.h> 16 #include <linux/input/matrix_keypad.h> 17 18 #define PM8XXX_MAX_ROWS 18 19 #define PM8XXX_MAX_COLS 8 20 #define PM8XXX_ROW_SHIFT 3 21 #define PM8XXX_MATRIX_MAX_SIZE (PM8XXX_MAX_ROWS * PM8XXX_MAX_COLS) 22 23 #define PM8XXX_MIN_ROWS 5 24 #define PM8XXX_MIN_COLS 5 25 26 #define MAX_SCAN_DELAY 128 27 #define MIN_SCAN_DELAY 1 28 29 /* in nanoseconds */ 30 #define MAX_ROW_HOLD_DELAY 122000 31 #define MIN_ROW_HOLD_DELAY 30500 32 33 #define MAX_DEBOUNCE_TIME 20 34 #define MIN_DEBOUNCE_TIME 5 35 36 #define KEYP_CTRL 0x148 37 38 #define KEYP_CTRL_EVNTS BIT(0) 39 #define KEYP_CTRL_EVNTS_MASK 0x3 40 41 #define KEYP_CTRL_SCAN_COLS_SHIFT 5 42 #define KEYP_CTRL_SCAN_COLS_MIN 5 43 #define KEYP_CTRL_SCAN_COLS_BITS 0x3 44 45 #define KEYP_CTRL_SCAN_ROWS_SHIFT 2 46 #define KEYP_CTRL_SCAN_ROWS_MIN 5 47 #define KEYP_CTRL_SCAN_ROWS_BITS 0x7 48 49 #define KEYP_CTRL_KEYP_EN BIT(7) 50 51 #define KEYP_SCAN 0x149 52 53 #define KEYP_SCAN_READ_STATE BIT(0) 54 #define KEYP_SCAN_DBOUNCE_SHIFT 1 55 #define KEYP_SCAN_PAUSE_SHIFT 3 56 #define KEYP_SCAN_ROW_HOLD_SHIFT 6 57 58 #define KEYP_TEST 0x14A 59 60 #define KEYP_TEST_CLEAR_RECENT_SCAN BIT(6) 61 #define KEYP_TEST_CLEAR_OLD_SCAN BIT(5) 62 #define KEYP_TEST_READ_RESET BIT(4) 63 #define KEYP_TEST_DTEST_EN BIT(3) 64 #define KEYP_TEST_ABORT_READ BIT(0) 65 66 #define KEYP_TEST_DBG_SELECT_SHIFT 1 67 68 /* bits of these registers represent 69 * '0' for key press 70 * '1' for key release 71 */ 72 #define KEYP_RECENT_DATA 0x14B 73 #define KEYP_OLD_DATA 0x14C 74 75 #define KEYP_CLOCK_FREQ 32768 76 77 /** 78 * struct pmic8xxx_kp - internal keypad data structure 79 * @num_cols: number of columns of keypad 80 * @num_rows: number of row of keypad 81 * @input: input device pointer for keypad 82 * @regmap: regmap handle 83 * @key_sense_irq: key press/release irq number 84 * @key_stuck_irq: key stuck notification irq number 85 * @keycodes: array to hold the key codes 86 * @dev: parent device pointer 87 * @keystate: present key press/release state 88 * @stuckstate: present state when key stuck irq 89 * @ctrl_reg: control register value 90 */ 91 struct pmic8xxx_kp { 92 unsigned int num_rows; 93 unsigned int num_cols; 94 struct input_dev *input; 95 struct regmap *regmap; 96 int key_sense_irq; 97 int key_stuck_irq; 98 99 unsigned short keycodes[PM8XXX_MATRIX_MAX_SIZE]; 100 101 struct device *dev; 102 u16 keystate[PM8XXX_MAX_ROWS]; 103 u16 stuckstate[PM8XXX_MAX_ROWS]; 104 105 u8 ctrl_reg; 106 }; 107 108 static u8 pmic8xxx_col_state(struct pmic8xxx_kp *kp, u8 col) 109 { 110 /* all keys pressed on that particular row? */ 111 if (col == 0x00) 112 return 1 << kp->num_cols; 113 else 114 return col & ((1 << kp->num_cols) - 1); 115 } 116 117 /* 118 * Synchronous read protocol for RevB0 onwards: 119 * 120 * 1. Write '1' to ReadState bit in KEYP_SCAN register 121 * 2. Wait 2*32KHz clocks, so that HW can successfully enter read mode 122 * synchronously 123 * 3. Read rows in old array first if events are more than one 124 * 4. Read rows in recent array 125 * 5. Wait 4*32KHz clocks 126 * 6. Write '0' to ReadState bit of KEYP_SCAN register so that hw can 127 * synchronously exit read mode. 128 */ 129 static int pmic8xxx_chk_sync_read(struct pmic8xxx_kp *kp) 130 { 131 int rc; 132 unsigned int scan_val; 133 134 rc = regmap_read(kp->regmap, KEYP_SCAN, &scan_val); 135 if (rc < 0) { 136 dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc); 137 return rc; 138 } 139 140 scan_val |= 0x1; 141 142 rc = regmap_write(kp->regmap, KEYP_SCAN, scan_val); 143 if (rc < 0) { 144 dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc); 145 return rc; 146 } 147 148 /* 2 * 32KHz clocks */ 149 udelay((2 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1); 150 151 return rc; 152 } 153 154 static int pmic8xxx_kp_read_data(struct pmic8xxx_kp *kp, u16 *state, 155 u16 data_reg, int read_rows) 156 { 157 int rc, row; 158 unsigned int val; 159 160 for (row = 0; row < read_rows; row++) { 161 rc = regmap_read(kp->regmap, data_reg, &val); 162 if (rc) 163 return rc; 164 dev_dbg(kp->dev, "%d = %d\n", row, val); 165 state[row] = pmic8xxx_col_state(kp, val); 166 } 167 168 return 0; 169 } 170 171 static int pmic8xxx_kp_read_matrix(struct pmic8xxx_kp *kp, u16 *new_state, 172 u16 *old_state) 173 { 174 int rc, read_rows; 175 unsigned int scan_val; 176 177 if (kp->num_rows < PM8XXX_MIN_ROWS) 178 read_rows = PM8XXX_MIN_ROWS; 179 else 180 read_rows = kp->num_rows; 181 182 pmic8xxx_chk_sync_read(kp); 183 184 if (old_state) { 185 rc = pmic8xxx_kp_read_data(kp, old_state, KEYP_OLD_DATA, 186 read_rows); 187 if (rc < 0) { 188 dev_err(kp->dev, 189 "Error reading KEYP_OLD_DATA, rc=%d\n", rc); 190 return rc; 191 } 192 } 193 194 rc = pmic8xxx_kp_read_data(kp, new_state, KEYP_RECENT_DATA, 195 read_rows); 196 if (rc < 0) { 197 dev_err(kp->dev, 198 "Error reading KEYP_RECENT_DATA, rc=%d\n", rc); 199 return rc; 200 } 201 202 /* 4 * 32KHz clocks */ 203 udelay((4 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1); 204 205 rc = regmap_read(kp->regmap, KEYP_SCAN, &scan_val); 206 if (rc < 0) { 207 dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc); 208 return rc; 209 } 210 211 scan_val &= 0xFE; 212 rc = regmap_write(kp->regmap, KEYP_SCAN, scan_val); 213 if (rc < 0) 214 dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc); 215 216 return rc; 217 } 218 219 static void __pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, u16 *new_state, 220 u16 *old_state) 221 { 222 int row, col, code; 223 224 for (row = 0; row < kp->num_rows; row++) { 225 int bits_changed = new_state[row] ^ old_state[row]; 226 227 if (!bits_changed) 228 continue; 229 230 for (col = 0; col < kp->num_cols; col++) { 231 if (!(bits_changed & (1 << col))) 232 continue; 233 234 dev_dbg(kp->dev, "key [%d:%d] %s\n", row, col, 235 !(new_state[row] & (1 << col)) ? 236 "pressed" : "released"); 237 238 code = MATRIX_SCAN_CODE(row, col, PM8XXX_ROW_SHIFT); 239 240 input_event(kp->input, EV_MSC, MSC_SCAN, code); 241 input_report_key(kp->input, 242 kp->keycodes[code], 243 !(new_state[row] & (1 << col))); 244 245 input_sync(kp->input); 246 } 247 } 248 } 249 250 static bool pmic8xxx_detect_ghost_keys(struct pmic8xxx_kp *kp, u16 *new_state) 251 { 252 int row, found_first = -1; 253 u16 check, row_state; 254 255 check = 0; 256 for (row = 0; row < kp->num_rows; row++) { 257 row_state = (~new_state[row]) & 258 ((1 << kp->num_cols) - 1); 259 260 if (hweight16(row_state) > 1) { 261 if (found_first == -1) 262 found_first = row; 263 if (check & row_state) { 264 dev_dbg(kp->dev, "detected ghost key on row[%d]" 265 " and row[%d]\n", found_first, row); 266 return true; 267 } 268 } 269 check |= row_state; 270 } 271 return false; 272 } 273 274 static int pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, unsigned int events) 275 { 276 u16 new_state[PM8XXX_MAX_ROWS]; 277 u16 old_state[PM8XXX_MAX_ROWS]; 278 int rc; 279 280 switch (events) { 281 case 0x1: 282 rc = pmic8xxx_kp_read_matrix(kp, new_state, NULL); 283 if (rc < 0) 284 return rc; 285 286 /* detecting ghost key is not an error */ 287 if (pmic8xxx_detect_ghost_keys(kp, new_state)) 288 return 0; 289 __pmic8xxx_kp_scan_matrix(kp, new_state, kp->keystate); 290 memcpy(kp->keystate, new_state, sizeof(new_state)); 291 break; 292 case 0x3: /* two events - eventcounter is gray-coded */ 293 rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state); 294 if (rc < 0) 295 return rc; 296 297 __pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate); 298 __pmic8xxx_kp_scan_matrix(kp, new_state, old_state); 299 memcpy(kp->keystate, new_state, sizeof(new_state)); 300 break; 301 case 0x2: 302 dev_dbg(kp->dev, "Some key events were lost\n"); 303 rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state); 304 if (rc < 0) 305 return rc; 306 __pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate); 307 __pmic8xxx_kp_scan_matrix(kp, new_state, old_state); 308 memcpy(kp->keystate, new_state, sizeof(new_state)); 309 break; 310 default: 311 rc = -EINVAL; 312 } 313 return rc; 314 } 315 316 /* 317 * NOTE: We are reading recent and old data registers blindly 318 * whenever key-stuck interrupt happens, because events counter doesn't 319 * get updated when this interrupt happens due to key stuck doesn't get 320 * considered as key state change. 321 * 322 * We are not using old data register contents after they are being read 323 * because it might report the key which was pressed before the key being stuck 324 * as stuck key because it's pressed status is stored in the old data 325 * register. 326 */ 327 static irqreturn_t pmic8xxx_kp_stuck_irq(int irq, void *data) 328 { 329 u16 new_state[PM8XXX_MAX_ROWS]; 330 u16 old_state[PM8XXX_MAX_ROWS]; 331 int rc; 332 struct pmic8xxx_kp *kp = data; 333 334 rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state); 335 if (rc < 0) { 336 dev_err(kp->dev, "failed to read keypad matrix\n"); 337 return IRQ_HANDLED; 338 } 339 340 __pmic8xxx_kp_scan_matrix(kp, new_state, kp->stuckstate); 341 342 return IRQ_HANDLED; 343 } 344 345 static irqreturn_t pmic8xxx_kp_irq(int irq, void *data) 346 { 347 struct pmic8xxx_kp *kp = data; 348 unsigned int ctrl_val, events; 349 int rc; 350 351 rc = regmap_read(kp->regmap, KEYP_CTRL, &ctrl_val); 352 if (rc < 0) { 353 dev_err(kp->dev, "failed to read keyp_ctrl register\n"); 354 return IRQ_HANDLED; 355 } 356 357 events = ctrl_val & KEYP_CTRL_EVNTS_MASK; 358 359 rc = pmic8xxx_kp_scan_matrix(kp, events); 360 if (rc < 0) 361 dev_err(kp->dev, "failed to scan matrix\n"); 362 363 return IRQ_HANDLED; 364 } 365 366 static int pmic8xxx_kpd_init(struct pmic8xxx_kp *kp, 367 struct platform_device *pdev) 368 { 369 const struct device_node *of_node = pdev->dev.of_node; 370 unsigned int scan_delay_ms; 371 unsigned int row_hold_ns; 372 unsigned int debounce_ms; 373 int bits, rc, cycles; 374 u8 scan_val = 0, ctrl_val = 0; 375 static const u8 row_bits[] = { 376 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7, 377 }; 378 379 /* Find column bits */ 380 if (kp->num_cols < KEYP_CTRL_SCAN_COLS_MIN) 381 bits = 0; 382 else 383 bits = kp->num_cols - KEYP_CTRL_SCAN_COLS_MIN; 384 ctrl_val = (bits & KEYP_CTRL_SCAN_COLS_BITS) << 385 KEYP_CTRL_SCAN_COLS_SHIFT; 386 387 /* Find row bits */ 388 if (kp->num_rows < KEYP_CTRL_SCAN_ROWS_MIN) 389 bits = 0; 390 else 391 bits = row_bits[kp->num_rows - KEYP_CTRL_SCAN_ROWS_MIN]; 392 393 ctrl_val |= (bits << KEYP_CTRL_SCAN_ROWS_SHIFT); 394 395 rc = regmap_write(kp->regmap, KEYP_CTRL, ctrl_val); 396 if (rc < 0) { 397 dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc); 398 return rc; 399 } 400 401 if (of_property_read_u32(of_node, "scan-delay", &scan_delay_ms)) 402 scan_delay_ms = MIN_SCAN_DELAY; 403 404 if (scan_delay_ms > MAX_SCAN_DELAY || scan_delay_ms < MIN_SCAN_DELAY || 405 !is_power_of_2(scan_delay_ms)) { 406 dev_err(&pdev->dev, "invalid keypad scan time supplied\n"); 407 return -EINVAL; 408 } 409 410 if (of_property_read_u32(of_node, "row-hold", &row_hold_ns)) 411 row_hold_ns = MIN_ROW_HOLD_DELAY; 412 413 if (row_hold_ns > MAX_ROW_HOLD_DELAY || 414 row_hold_ns < MIN_ROW_HOLD_DELAY || 415 ((row_hold_ns % MIN_ROW_HOLD_DELAY) != 0)) { 416 dev_err(&pdev->dev, "invalid keypad row hold time supplied\n"); 417 return -EINVAL; 418 } 419 420 if (of_property_read_u32(of_node, "debounce", &debounce_ms)) 421 debounce_ms = MIN_DEBOUNCE_TIME; 422 423 if (((debounce_ms % 5) != 0) || 424 debounce_ms > MAX_DEBOUNCE_TIME || 425 debounce_ms < MIN_DEBOUNCE_TIME) { 426 dev_err(&pdev->dev, "invalid debounce time supplied\n"); 427 return -EINVAL; 428 } 429 430 bits = (debounce_ms / 5) - 1; 431 432 scan_val |= (bits << KEYP_SCAN_DBOUNCE_SHIFT); 433 434 bits = fls(scan_delay_ms) - 1; 435 scan_val |= (bits << KEYP_SCAN_PAUSE_SHIFT); 436 437 /* Row hold time is a multiple of 32KHz cycles. */ 438 cycles = (row_hold_ns * KEYP_CLOCK_FREQ) / NSEC_PER_SEC; 439 440 scan_val |= (cycles << KEYP_SCAN_ROW_HOLD_SHIFT); 441 442 rc = regmap_write(kp->regmap, KEYP_SCAN, scan_val); 443 if (rc) 444 dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc); 445 446 return rc; 447 448 } 449 450 static int pmic8xxx_kp_enable(struct pmic8xxx_kp *kp) 451 { 452 int rc; 453 454 kp->ctrl_reg |= KEYP_CTRL_KEYP_EN; 455 456 rc = regmap_write(kp->regmap, KEYP_CTRL, kp->ctrl_reg); 457 if (rc < 0) 458 dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc); 459 460 return rc; 461 } 462 463 static int pmic8xxx_kp_disable(struct pmic8xxx_kp *kp) 464 { 465 int rc; 466 467 kp->ctrl_reg &= ~KEYP_CTRL_KEYP_EN; 468 469 rc = regmap_write(kp->regmap, KEYP_CTRL, kp->ctrl_reg); 470 if (rc < 0) 471 return rc; 472 473 return rc; 474 } 475 476 static int pmic8xxx_kp_open(struct input_dev *dev) 477 { 478 struct pmic8xxx_kp *kp = input_get_drvdata(dev); 479 480 return pmic8xxx_kp_enable(kp); 481 } 482 483 static void pmic8xxx_kp_close(struct input_dev *dev) 484 { 485 struct pmic8xxx_kp *kp = input_get_drvdata(dev); 486 487 pmic8xxx_kp_disable(kp); 488 } 489 490 /* 491 * keypad controller should be initialized in the following sequence 492 * only, otherwise it might get into FSM stuck state. 493 * 494 * - Initialize keypad control parameters, like no. of rows, columns, 495 * timing values etc., 496 * - configure rows and column gpios pull up/down. 497 * - set irq edge type. 498 * - enable the keypad controller. 499 */ 500 static int pmic8xxx_kp_probe(struct platform_device *pdev) 501 { 502 struct device_node *np = pdev->dev.of_node; 503 unsigned int rows, cols; 504 bool repeat; 505 bool wakeup; 506 struct pmic8xxx_kp *kp; 507 int rc; 508 unsigned int ctrl_val; 509 510 rc = matrix_keypad_parse_properties(&pdev->dev, &rows, &cols); 511 if (rc) 512 return rc; 513 514 if (cols > PM8XXX_MAX_COLS || rows > PM8XXX_MAX_ROWS || 515 cols < PM8XXX_MIN_COLS) { 516 dev_err(&pdev->dev, "invalid platform data\n"); 517 return -EINVAL; 518 } 519 520 repeat = !of_property_read_bool(np, "linux,input-no-autorepeat"); 521 522 wakeup = of_property_read_bool(np, "wakeup-source") || 523 /* legacy name */ 524 of_property_read_bool(np, "linux,keypad-wakeup"); 525 526 kp = devm_kzalloc(&pdev->dev, sizeof(*kp), GFP_KERNEL); 527 if (!kp) 528 return -ENOMEM; 529 530 kp->regmap = dev_get_regmap(pdev->dev.parent, NULL); 531 if (!kp->regmap) 532 return -ENODEV; 533 534 platform_set_drvdata(pdev, kp); 535 536 kp->num_rows = rows; 537 kp->num_cols = cols; 538 kp->dev = &pdev->dev; 539 540 kp->input = devm_input_allocate_device(&pdev->dev); 541 if (!kp->input) { 542 dev_err(&pdev->dev, "unable to allocate input device\n"); 543 return -ENOMEM; 544 } 545 546 kp->key_sense_irq = platform_get_irq(pdev, 0); 547 if (kp->key_sense_irq < 0) 548 return kp->key_sense_irq; 549 550 kp->key_stuck_irq = platform_get_irq(pdev, 1); 551 if (kp->key_stuck_irq < 0) 552 return kp->key_stuck_irq; 553 554 kp->input->name = "PMIC8XXX keypad"; 555 kp->input->phys = "pmic8xxx_keypad/input0"; 556 557 kp->input->id.bustype = BUS_I2C; 558 kp->input->id.version = 0x0001; 559 kp->input->id.product = 0x0001; 560 kp->input->id.vendor = 0x0001; 561 562 kp->input->open = pmic8xxx_kp_open; 563 kp->input->close = pmic8xxx_kp_close; 564 565 rc = matrix_keypad_build_keymap(NULL, NULL, 566 PM8XXX_MAX_ROWS, PM8XXX_MAX_COLS, 567 kp->keycodes, kp->input); 568 if (rc) { 569 dev_err(&pdev->dev, "failed to build keymap\n"); 570 return rc; 571 } 572 573 if (repeat) 574 __set_bit(EV_REP, kp->input->evbit); 575 input_set_capability(kp->input, EV_MSC, MSC_SCAN); 576 577 input_set_drvdata(kp->input, kp); 578 579 /* initialize keypad state */ 580 memset(kp->keystate, 0xff, sizeof(kp->keystate)); 581 memset(kp->stuckstate, 0xff, sizeof(kp->stuckstate)); 582 583 rc = pmic8xxx_kpd_init(kp, pdev); 584 if (rc < 0) { 585 dev_err(&pdev->dev, "unable to initialize keypad controller\n"); 586 return rc; 587 } 588 589 rc = devm_request_any_context_irq(&pdev->dev, kp->key_sense_irq, 590 pmic8xxx_kp_irq, IRQF_TRIGGER_RISING, "pmic-keypad", 591 kp); 592 if (rc < 0) { 593 dev_err(&pdev->dev, "failed to request keypad sense irq\n"); 594 return rc; 595 } 596 597 rc = devm_request_any_context_irq(&pdev->dev, kp->key_stuck_irq, 598 pmic8xxx_kp_stuck_irq, IRQF_TRIGGER_RISING, 599 "pmic-keypad-stuck", kp); 600 if (rc < 0) { 601 dev_err(&pdev->dev, "failed to request keypad stuck irq\n"); 602 return rc; 603 } 604 605 rc = regmap_read(kp->regmap, KEYP_CTRL, &ctrl_val); 606 if (rc < 0) { 607 dev_err(&pdev->dev, "failed to read KEYP_CTRL register\n"); 608 return rc; 609 } 610 611 kp->ctrl_reg = ctrl_val; 612 613 rc = input_register_device(kp->input); 614 if (rc < 0) { 615 dev_err(&pdev->dev, "unable to register keypad input device\n"); 616 return rc; 617 } 618 619 device_init_wakeup(&pdev->dev, wakeup); 620 621 return 0; 622 } 623 624 static int pmic8xxx_kp_suspend(struct device *dev) 625 { 626 struct platform_device *pdev = to_platform_device(dev); 627 struct pmic8xxx_kp *kp = platform_get_drvdata(pdev); 628 struct input_dev *input_dev = kp->input; 629 630 if (device_may_wakeup(dev)) { 631 enable_irq_wake(kp->key_sense_irq); 632 } else { 633 mutex_lock(&input_dev->mutex); 634 635 if (input_device_enabled(input_dev)) 636 pmic8xxx_kp_disable(kp); 637 638 mutex_unlock(&input_dev->mutex); 639 } 640 641 return 0; 642 } 643 644 static int pmic8xxx_kp_resume(struct device *dev) 645 { 646 struct platform_device *pdev = to_platform_device(dev); 647 struct pmic8xxx_kp *kp = platform_get_drvdata(pdev); 648 struct input_dev *input_dev = kp->input; 649 650 if (device_may_wakeup(dev)) { 651 disable_irq_wake(kp->key_sense_irq); 652 } else { 653 mutex_lock(&input_dev->mutex); 654 655 if (input_device_enabled(input_dev)) 656 pmic8xxx_kp_enable(kp); 657 658 mutex_unlock(&input_dev->mutex); 659 } 660 661 return 0; 662 } 663 664 static DEFINE_SIMPLE_DEV_PM_OPS(pm8xxx_kp_pm_ops, 665 pmic8xxx_kp_suspend, pmic8xxx_kp_resume); 666 667 static const struct of_device_id pm8xxx_match_table[] = { 668 { .compatible = "qcom,pm8058-keypad" }, 669 { .compatible = "qcom,pm8921-keypad" }, 670 { } 671 }; 672 MODULE_DEVICE_TABLE(of, pm8xxx_match_table); 673 674 static struct platform_driver pmic8xxx_kp_driver = { 675 .probe = pmic8xxx_kp_probe, 676 .driver = { 677 .name = "pm8xxx-keypad", 678 .pm = pm_sleep_ptr(&pm8xxx_kp_pm_ops), 679 .of_match_table = pm8xxx_match_table, 680 }, 681 }; 682 module_platform_driver(pmic8xxx_kp_driver); 683 684 MODULE_LICENSE("GPL v2"); 685 MODULE_DESCRIPTION("PMIC8XXX keypad driver"); 686 MODULE_ALIAS("platform:pmic8xxx_keypad"); 687 MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>"); 688