drivers/input/misc/kxtj9.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
kxtj9_i2c_read
kxtj9_report_acceleration_data
kxtj9_isr
kxtj9_update_g_range
kxtj9_update_odr
kxtj9_device_power_on
kxtj9_device_power_off
kxtj9_enable
kxtj9_disable
kxtj9_input_open
kxtj9_input_close
kxtj9_init_input_device
kxtj9_setup_input_device
kxtj9_get_poll
kxtj9_set_poll
kxtj9_poll
kxtj9_polled_input_open
kxtj9_polled_input_close
kxtj9_setup_polled_device
kxtj9_teardown_polled_device
kxtj9_setup_polled_device
kxtj9_teardown_polled_device
kxtj9_verify
kxtj9_probe
kxtj9_remove
kxtj9_suspend
kxtj9_resume
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2011 Kionix, Inc.
   4  * Written by Chris Hudson <chudson@kionix.com>
   5  */
   6 
   7 #include <linux/delay.h>
   8 #include <linux/i2c.h>
   9 #include <linux/input.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <linux/input/kxtj9.h>
  14 #include <linux/input-polldev.h>
  15 
  16 #define NAME                    "kxtj9"
  17 #define G_MAX                   8000
  18 /* OUTPUT REGISTERS */
  19 #define XOUT_L                  0x06
  20 #define WHO_AM_I                0x0F
  21 /* CONTROL REGISTERS */
  22 #define INT_REL                 0x1A
  23 #define CTRL_REG1               0x1B
  24 #define INT_CTRL1               0x1E
  25 #define DATA_CTRL               0x21
  26 /* CONTROL REGISTER 1 BITS */
  27 #define PC1_OFF                 0x7F
  28 #define PC1_ON                  (1 << 7)
  29 /* Data ready funtion enable bit: set during probe if using irq mode */
  30 #define DRDYE                   (1 << 5)
  31 /* DATA CONTROL REGISTER BITS */
  32 #define ODR12_5F                0
  33 #define ODR25F                  1
  34 #define ODR50F                  2
  35 #define ODR100F         3
  36 #define ODR200F         4
  37 #define ODR400F         5
  38 #define ODR800F         6
  39 /* INTERRUPT CONTROL REGISTER 1 BITS */
  40 /* Set these during probe if using irq mode */
  41 #define KXTJ9_IEL               (1 << 3)
  42 #define KXTJ9_IEA               (1 << 4)
  43 #define KXTJ9_IEN               (1 << 5)
  44 /* INPUT_ABS CONSTANTS */
  45 #define FUZZ                    3
  46 #define FLAT                    3
  47 /* RESUME STATE INDICES */
  48 #define RES_DATA_CTRL           0
  49 #define RES_CTRL_REG1           1
  50 #define RES_INT_CTRL1           2
  51 #define RESUME_ENTRIES          3
  52 
  53 /*
  54  * The following table lists the maximum appropriate poll interval for each
  55  * available output data rate.
  56  */
  57 static const struct {
  58         unsigned int cutoff;
  59         u8 mask;
  60 } kxtj9_odr_table[] = {
  61         { 3,    ODR800F },
  62         { 5,    ODR400F },
  63         { 10,   ODR200F },
  64         { 20,   ODR100F },
  65         { 40,   ODR50F  },
  66         { 80,   ODR25F  },
  67         { 0,    ODR12_5F},
  68 };
  69 
  70 struct kxtj9_data {
  71         struct i2c_client *client;
  72         struct kxtj9_platform_data pdata;
  73         struct input_dev *input_dev;
  74 #ifdef CONFIG_INPUT_KXTJ9_POLLED_MODE
  75         struct input_polled_dev *poll_dev;
  76 #endif
  77         unsigned int last_poll_interval;
  78         u8 shift;
  79         u8 ctrl_reg1;
  80         u8 data_ctrl;
  81         u8 int_ctrl;
  82 };
  83 
  84 static int kxtj9_i2c_read(struct kxtj9_data *tj9, u8 addr, u8 *data, int len)
  85 {
  86         struct i2c_msg msgs[] = {
  87                 {
  88                         .addr = tj9->client->addr,
  89                         .flags = tj9->client->flags,
  90                         .len = 1,
  91                         .buf = &addr,
  92                 },
  93                 {
  94                         .addr = tj9->client->addr,
  95                         .flags = tj9->client->flags | I2C_M_RD,
  96                         .len = len,
  97                         .buf = data,
  98                 },
  99         };
 100 
 101         return i2c_transfer(tj9->client->adapter, msgs, 2);
 102 }
 103 
 104 static void kxtj9_report_acceleration_data(struct kxtj9_data *tj9)
 105 {
 106         s16 acc_data[3]; /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
 107         s16 x, y, z;
 108         int err;
 109 
 110         err = kxtj9_i2c_read(tj9, XOUT_L, (u8 *)acc_data, 6);
 111         if (err < 0)
 112                 dev_err(&tj9->client->dev, "accelerometer data read failed\n");
 113 
 114         x = le16_to_cpu(acc_data[tj9->pdata.axis_map_x]);
 115         y = le16_to_cpu(acc_data[tj9->pdata.axis_map_y]);
 116         z = le16_to_cpu(acc_data[tj9->pdata.axis_map_z]);
 117 
 118         x >>= tj9->shift;
 119         y >>= tj9->shift;
 120         z >>= tj9->shift;
 121 
 122         input_report_abs(tj9->input_dev, ABS_X, tj9->pdata.negate_x ? -x : x);
 123         input_report_abs(tj9->input_dev, ABS_Y, tj9->pdata.negate_y ? -y : y);
 124         input_report_abs(tj9->input_dev, ABS_Z, tj9->pdata.negate_z ? -z : z);
 125         input_sync(tj9->input_dev);
 126 }
 127 
 128 static irqreturn_t kxtj9_isr(int irq, void *dev)
 129 {
 130         struct kxtj9_data *tj9 = dev;
 131         int err;
 132 
 133         /* data ready is the only possible interrupt type */
 134         kxtj9_report_acceleration_data(tj9);
 135 
 136         err = i2c_smbus_read_byte_data(tj9->client, INT_REL);
 137         if (err < 0)
 138                 dev_err(&tj9->client->dev,
 139                         "error clearing interrupt status: %d\n", err);
 140 
 141         return IRQ_HANDLED;
 142 }
 143 
 144 static int kxtj9_update_g_range(struct kxtj9_data *tj9, u8 new_g_range)
 145 {
 146         switch (new_g_range) {
 147         case KXTJ9_G_2G:
 148                 tj9->shift = 4;
 149                 break;
 150         case KXTJ9_G_4G:
 151                 tj9->shift = 3;
 152                 break;
 153         case KXTJ9_G_8G:
 154                 tj9->shift = 2;
 155                 break;
 156         default:
 157                 return -EINVAL;
 158         }
 159 
 160         tj9->ctrl_reg1 &= 0xe7;
 161         tj9->ctrl_reg1 |= new_g_range;
 162 
 163         return 0;
 164 }
 165 
 166 static int kxtj9_update_odr(struct kxtj9_data *tj9, unsigned int poll_interval)
 167 {
 168         int err;
 169         int i;
 170 
 171         /* Use the lowest ODR that can support the requested poll interval */
 172         for (i = 0; i < ARRAY_SIZE(kxtj9_odr_table); i++) {
 173                 tj9->data_ctrl = kxtj9_odr_table[i].mask;
 174                 if (poll_interval < kxtj9_odr_table[i].cutoff)
 175                         break;
 176         }
 177 
 178         err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0);
 179         if (err < 0)
 180                 return err;
 181 
 182         err = i2c_smbus_write_byte_data(tj9->client, DATA_CTRL, tj9->data_ctrl);
 183         if (err < 0)
 184                 return err;
 185 
 186         err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1);
 187         if (err < 0)
 188                 return err;
 189 
 190         return 0;
 191 }
 192 
 193 static int kxtj9_device_power_on(struct kxtj9_data *tj9)
 194 {
 195         if (tj9->pdata.power_on)
 196                 return tj9->pdata.power_on();
 197 
 198         return 0;
 199 }
 200 
 201 static void kxtj9_device_power_off(struct kxtj9_data *tj9)
 202 {
 203         int err;
 204 
 205         tj9->ctrl_reg1 &= PC1_OFF;
 206         err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1);
 207         if (err < 0)
 208                 dev_err(&tj9->client->dev, "soft power off failed\n");
 209 
 210         if (tj9->pdata.power_off)
 211                 tj9->pdata.power_off();
 212 }
 213 
 214 static int kxtj9_enable(struct kxtj9_data *tj9)
 215 {
 216         int err;
 217 
 218         err = kxtj9_device_power_on(tj9);
 219         if (err < 0)
 220                 return err;
 221 
 222         /* ensure that PC1 is cleared before updating control registers */
 223         err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0);
 224         if (err < 0)
 225                 return err;
 226 
 227         /* only write INT_CTRL_REG1 if in irq mode */
 228         if (tj9->client->irq) {
 229                 err = i2c_smbus_write_byte_data(tj9->client,
 230                                                 INT_CTRL1, tj9->int_ctrl);
 231                 if (err < 0)
 232                         return err;
 233         }
 234 
 235         err = kxtj9_update_g_range(tj9, tj9->pdata.g_range);
 236         if (err < 0)
 237                 return err;
 238 
 239         /* turn on outputs */
 240         tj9->ctrl_reg1 |= PC1_ON;
 241         err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1);
 242         if (err < 0)
 243                 return err;
 244 
 245         err = kxtj9_update_odr(tj9, tj9->last_poll_interval);
 246         if (err < 0)
 247                 return err;
 248 
 249         /* clear initial interrupt if in irq mode */
 250         if (tj9->client->irq) {
 251                 err = i2c_smbus_read_byte_data(tj9->client, INT_REL);
 252                 if (err < 0) {
 253                         dev_err(&tj9->client->dev,
 254                                 "error clearing interrupt: %d\n", err);
 255                         goto fail;
 256                 }
 257         }
 258 
 259         return 0;
 260 
 261 fail:
 262         kxtj9_device_power_off(tj9);
 263         return err;
 264 }
 265 
 266 static void kxtj9_disable(struct kxtj9_data *tj9)
 267 {
 268         kxtj9_device_power_off(tj9);
 269 }
 270 
 271 static int kxtj9_input_open(struct input_dev *input)
 272 {
 273         struct kxtj9_data *tj9 = input_get_drvdata(input);
 274 
 275         return kxtj9_enable(tj9);
 276 }
 277 
 278 static void kxtj9_input_close(struct input_dev *dev)
 279 {
 280         struct kxtj9_data *tj9 = input_get_drvdata(dev);
 281 
 282         kxtj9_disable(tj9);
 283 }
 284 
 285 static void kxtj9_init_input_device(struct kxtj9_data *tj9,
 286                                               struct input_dev *input_dev)
 287 {
 288         __set_bit(EV_ABS, input_dev->evbit);
 289         input_set_abs_params(input_dev, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT);
 290         input_set_abs_params(input_dev, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT);
 291         input_set_abs_params(input_dev, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT);
 292 
 293         input_dev->name = "kxtj9_accel";
 294         input_dev->id.bustype = BUS_I2C;
 295         input_dev->dev.parent = &tj9->client->dev;
 296 }
 297 
 298 static int kxtj9_setup_input_device(struct kxtj9_data *tj9)
 299 {
 300         struct input_dev *input_dev;
 301         int err;
 302 
 303         input_dev = input_allocate_device();
 304         if (!input_dev) {
 305                 dev_err(&tj9->client->dev, "input device allocate failed\n");
 306                 return -ENOMEM;
 307         }
 308 
 309         tj9->input_dev = input_dev;
 310 
 311         input_dev->open = kxtj9_input_open;
 312         input_dev->close = kxtj9_input_close;
 313         input_set_drvdata(input_dev, tj9);
 314 
 315         kxtj9_init_input_device(tj9, input_dev);
 316 
 317         err = input_register_device(tj9->input_dev);
 318         if (err) {
 319                 dev_err(&tj9->client->dev,
 320                         "unable to register input polled device %s: %d\n",
 321                         tj9->input_dev->name, err);
 322                 input_free_device(tj9->input_dev);
 323                 return err;
 324         }
 325 
 326         return 0;
 327 }
 328 
 329 /*
 330  * When IRQ mode is selected, we need to provide an interface to allow the user
 331  * to change the output data rate of the part.  For consistency, we are using
 332  * the set_poll method, which accepts a poll interval in milliseconds, and then
 333  * calls update_odr() while passing this value as an argument.  In IRQ mode, the
 334  * data outputs will not be read AT the requested poll interval, rather, the
 335  * lowest ODR that can support the requested interval.  The client application
 336  * will be responsible for retrieving data from the input node at the desired
 337  * interval.
 338  */
 339 
 340 /* Returns currently selected poll interval (in ms) */
 341 static ssize_t kxtj9_get_poll(struct device *dev,
 342                                 struct device_attribute *attr, char *buf)
 343 {
 344         struct i2c_client *client = to_i2c_client(dev);
 345         struct kxtj9_data *tj9 = i2c_get_clientdata(client);
 346 
 347         return sprintf(buf, "%d\n", tj9->last_poll_interval);
 348 }
 349 
 350 /* Allow users to select a new poll interval (in ms) */
 351 static ssize_t kxtj9_set_poll(struct device *dev, struct device_attribute *attr,
 352                                                 const char *buf, size_t count)
 353 {
 354         struct i2c_client *client = to_i2c_client(dev);
 355         struct kxtj9_data *tj9 = i2c_get_clientdata(client);
 356         struct input_dev *input_dev = tj9->input_dev;
 357         unsigned int interval;
 358         int error;
 359 
 360         error = kstrtouint(buf, 10, &interval);
 361         if (error < 0)
 362                 return error;
 363 
 364         /* Lock the device to prevent races with open/close (and itself) */
 365         mutex_lock(&input_dev->mutex);
 366 
 367         disable_irq(client->irq);
 368 
 369         /*
 370          * Set current interval to the greater of the minimum interval or
 371          * the requested interval
 372          */
 373         tj9->last_poll_interval = max(interval, tj9->pdata.min_interval);
 374 
 375         kxtj9_update_odr(tj9, tj9->last_poll_interval);
 376 
 377         enable_irq(client->irq);
 378         mutex_unlock(&input_dev->mutex);
 379 
 380         return count;
 381 }
 382 
 383 static DEVICE_ATTR(poll, S_IRUGO|S_IWUSR, kxtj9_get_poll, kxtj9_set_poll);
 384 
 385 static struct attribute *kxtj9_attributes[] = {
 386         &dev_attr_poll.attr,
 387         NULL
 388 };
 389 
 390 static struct attribute_group kxtj9_attribute_group = {
 391         .attrs = kxtj9_attributes
 392 };
 393 
 394 
 395 #ifdef CONFIG_INPUT_KXTJ9_POLLED_MODE
 396 static void kxtj9_poll(struct input_polled_dev *dev)
 397 {
 398         struct kxtj9_data *tj9 = dev->private;
 399         unsigned int poll_interval = dev->poll_interval;
 400 
 401         kxtj9_report_acceleration_data(tj9);
 402 
 403         if (poll_interval != tj9->last_poll_interval) {
 404                 kxtj9_update_odr(tj9, poll_interval);
 405                 tj9->last_poll_interval = poll_interval;
 406         }
 407 }
 408 
 409 static void kxtj9_polled_input_open(struct input_polled_dev *dev)
 410 {
 411         struct kxtj9_data *tj9 = dev->private;
 412 
 413         kxtj9_enable(tj9);
 414 }
 415 
 416 static void kxtj9_polled_input_close(struct input_polled_dev *dev)
 417 {
 418         struct kxtj9_data *tj9 = dev->private;
 419 
 420         kxtj9_disable(tj9);
 421 }
 422 
 423 static int kxtj9_setup_polled_device(struct kxtj9_data *tj9)
 424 {
 425         int err;
 426         struct input_polled_dev *poll_dev;
 427         poll_dev = input_allocate_polled_device();
 428 
 429         if (!poll_dev) {
 430                 dev_err(&tj9->client->dev,
 431                         "Failed to allocate polled device\n");
 432                 return -ENOMEM;
 433         }
 434 
 435         tj9->poll_dev = poll_dev;
 436         tj9->input_dev = poll_dev->input;
 437 
 438         poll_dev->private = tj9;
 439         poll_dev->poll = kxtj9_poll;
 440         poll_dev->open = kxtj9_polled_input_open;
 441         poll_dev->close = kxtj9_polled_input_close;
 442 
 443         kxtj9_init_input_device(tj9, poll_dev->input);
 444 
 445         err = input_register_polled_device(poll_dev);
 446         if (err) {
 447                 dev_err(&tj9->client->dev,
 448                         "Unable to register polled device, err=%d\n", err);
 449                 input_free_polled_device(poll_dev);
 450                 return err;
 451         }
 452 
 453         return 0;
 454 }
 455 
 456 static void kxtj9_teardown_polled_device(struct kxtj9_data *tj9)
 457 {
 458         input_unregister_polled_device(tj9->poll_dev);
 459         input_free_polled_device(tj9->poll_dev);
 460 }
 461 
 462 #else
 463 
 464 static inline int kxtj9_setup_polled_device(struct kxtj9_data *tj9)
 465 {
 466         return -ENOSYS;
 467 }
 468 
 469 static inline void kxtj9_teardown_polled_device(struct kxtj9_data *tj9)
 470 {
 471 }
 472 
 473 #endif
 474 
 475 static int kxtj9_verify(struct kxtj9_data *tj9)
 476 {
 477         int retval;
 478 
 479         retval = kxtj9_device_power_on(tj9);
 480         if (retval < 0)
 481                 return retval;
 482 
 483         retval = i2c_smbus_read_byte_data(tj9->client, WHO_AM_I);
 484         if (retval < 0) {
 485                 dev_err(&tj9->client->dev, "read err int source\n");
 486                 goto out;
 487         }
 488 
 489         retval = (retval != 0x07 && retval != 0x08) ? -EIO : 0;
 490 
 491 out:
 492         kxtj9_device_power_off(tj9);
 493         return retval;
 494 }
 495 
 496 static int kxtj9_probe(struct i2c_client *client,
 497                                  const struct i2c_device_id *id)
 498 {
 499         const struct kxtj9_platform_data *pdata =
 500                         dev_get_platdata(&client->dev);
 501         struct kxtj9_data *tj9;
 502         int err;
 503 
 504         if (!i2c_check_functionality(client->adapter,
 505                                 I2C_FUNC_I2C | I2C_FUNC_SMBUS_BYTE_DATA)) {
 506                 dev_err(&client->dev, "client is not i2c capable\n");
 507                 return -ENXIO;
 508         }
 509 
 510         if (!pdata) {
 511                 dev_err(&client->dev, "platform data is NULL; exiting\n");
 512                 return -EINVAL;
 513         }
 514 
 515         tj9 = kzalloc(sizeof(*tj9), GFP_KERNEL);
 516         if (!tj9) {
 517                 dev_err(&client->dev,
 518                         "failed to allocate memory for module data\n");
 519                 return -ENOMEM;
 520         }
 521 
 522         tj9->client = client;
 523         tj9->pdata = *pdata;
 524 
 525         if (pdata->init) {
 526                 err = pdata->init();
 527                 if (err < 0)
 528                         goto err_free_mem;
 529         }
 530 
 531         err = kxtj9_verify(tj9);
 532         if (err < 0) {
 533                 dev_err(&client->dev, "device not recognized\n");
 534                 goto err_pdata_exit;
 535         }
 536 
 537         i2c_set_clientdata(client, tj9);
 538 
 539         tj9->ctrl_reg1 = tj9->pdata.res_12bit | tj9->pdata.g_range;
 540         tj9->last_poll_interval = tj9->pdata.init_interval;
 541 
 542         if (client->irq) {
 543                 /* If in irq mode, populate INT_CTRL_REG1 and enable DRDY. */
 544                 tj9->int_ctrl |= KXTJ9_IEN | KXTJ9_IEA | KXTJ9_IEL;
 545                 tj9->ctrl_reg1 |= DRDYE;
 546 
 547                 err = kxtj9_setup_input_device(tj9);
 548                 if (err)
 549                         goto err_pdata_exit;
 550 
 551                 err = request_threaded_irq(client->irq, NULL, kxtj9_isr,
 552                                            IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 553                                            "kxtj9-irq", tj9);
 554                 if (err) {
 555                         dev_err(&client->dev, "request irq failed: %d\n", err);
 556                         goto err_destroy_input;
 557                 }
 558 
 559                 err = sysfs_create_group(&client->dev.kobj, &kxtj9_attribute_group);
 560                 if (err) {
 561                         dev_err(&client->dev, "sysfs create failed: %d\n", err);
 562                         goto err_free_irq;
 563                 }
 564 
 565         } else {
 566                 err = kxtj9_setup_polled_device(tj9);
 567                 if (err)
 568                         goto err_pdata_exit;
 569         }
 570 
 571         return 0;
 572 
 573 err_free_irq:
 574         free_irq(client->irq, tj9);
 575 err_destroy_input:
 576         input_unregister_device(tj9->input_dev);
 577 err_pdata_exit:
 578         if (tj9->pdata.exit)
 579                 tj9->pdata.exit();
 580 err_free_mem:
 581         kfree(tj9);
 582         return err;
 583 }
 584 
 585 static int kxtj9_remove(struct i2c_client *client)
 586 {
 587         struct kxtj9_data *tj9 = i2c_get_clientdata(client);
 588 
 589         if (client->irq) {
 590                 sysfs_remove_group(&client->dev.kobj, &kxtj9_attribute_group);
 591                 free_irq(client->irq, tj9);
 592                 input_unregister_device(tj9->input_dev);
 593         } else {
 594                 kxtj9_teardown_polled_device(tj9);
 595         }
 596 
 597         if (tj9->pdata.exit)
 598                 tj9->pdata.exit();
 599 
 600         kfree(tj9);
 601 
 602         return 0;
 603 }
 604 
 605 static int __maybe_unused kxtj9_suspend(struct device *dev)
 606 {
 607         struct i2c_client *client = to_i2c_client(dev);
 608         struct kxtj9_data *tj9 = i2c_get_clientdata(client);
 609         struct input_dev *input_dev = tj9->input_dev;
 610 
 611         mutex_lock(&input_dev->mutex);
 612 
 613         if (input_dev->users)
 614                 kxtj9_disable(tj9);
 615 
 616         mutex_unlock(&input_dev->mutex);
 617         return 0;
 618 }
 619 
 620 static int __maybe_unused kxtj9_resume(struct device *dev)
 621 {
 622         struct i2c_client *client = to_i2c_client(dev);
 623         struct kxtj9_data *tj9 = i2c_get_clientdata(client);
 624         struct input_dev *input_dev = tj9->input_dev;
 625 
 626         mutex_lock(&input_dev->mutex);
 627 
 628         if (input_dev->users)
 629                 kxtj9_enable(tj9);
 630 
 631         mutex_unlock(&input_dev->mutex);
 632         return 0;
 633 }
 634 
 635 static SIMPLE_DEV_PM_OPS(kxtj9_pm_ops, kxtj9_suspend, kxtj9_resume);
 636 
 637 static const struct i2c_device_id kxtj9_id[] = {
 638         { NAME, 0 },
 639         { },
 640 };
 641 
 642 MODULE_DEVICE_TABLE(i2c, kxtj9_id);
 643 
 644 static struct i2c_driver kxtj9_driver = {
 645         .driver = {
 646                 .name   = NAME,
 647                 .pm     = &kxtj9_pm_ops,
 648         },
 649         .probe          = kxtj9_probe,
 650         .remove         = kxtj9_remove,
 651         .id_table       = kxtj9_id,
 652 };
 653 
 654 module_i2c_driver(kxtj9_driver);
 655 
 656 MODULE_DESCRIPTION("KXTJ9 accelerometer driver");
 657 MODULE_AUTHOR("Chris Hudson <chudson@kionix.com>");
 658 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/input/misc/kxtj9.c

DEFINITIONS
