drivers/input/keyboard/spitzkbd.c

   1 /*
   2  *  Keyboard driver for Sharp Spitz, Borzoi and Akita (SL-Cxx00 series)
   3  *
   4  *  Copyright (c) 2005 Richard Purdie
   5  *
   6  *  Based on corgikbd.c
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/init.h>
  17 #include <linux/input.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/jiffies.h>
  20 #include <linux/module.h>
  21 #include <linux/slab.h>
  22
  23 #include <asm/arch/spitz.h>
  24 #include <asm/arch/hardware.h>
  25 #include <asm/arch/pxa-regs.h>
  26 #include <asm/arch/pxa2xx-gpio.h>
  27
  28 #define KB_ROWS                 7
  29 #define KB_COLS                 11
  30 #define KB_ROWMASK(r)           (1 << (r))
  31 #define SCANCODE(r,c)           (((r)<<4) + (c) + 1)
  32 #define NR_SCANCODES            ((KB_ROWS<<4) + 1)
  33
  34 #define SCAN_INTERVAL           (50) /* ms */
  35 #define HINGE_SCAN_INTERVAL     (150) /* ms */
  36
  37 #define SPITZ_KEY_CALENDER      KEY_F1
  38 #define SPITZ_KEY_ADDRESS       KEY_F2
  39 #define SPITZ_KEY_FN            KEY_F3
  40 #define SPITZ_KEY_CANCEL        KEY_F4
  41 #define SPITZ_KEY_EXOK          KEY_F5
  42 #define SPITZ_KEY_EXCANCEL      KEY_F6
  43 #define SPITZ_KEY_EXJOGDOWN     KEY_F7
  44 #define SPITZ_KEY_EXJOGUP       KEY_F8
  45 #define SPITZ_KEY_JAP1          KEY_LEFTALT
  46 #define SPITZ_KEY_JAP2          KEY_RIGHTCTRL
  47 #define SPITZ_KEY_SYNC          KEY_F9
  48 #define SPITZ_KEY_MAIL          KEY_F10
  49 #define SPITZ_KEY_OK            KEY_F11
  50 #define SPITZ_KEY_MENU          KEY_F12
  51
  52 static unsigned char spitzkbd_keycode[NR_SCANCODES] = {
  53         0,                                                                                                                /* 0 */
  54         KEY_LEFTCTRL, KEY_1, KEY_3, KEY_5, KEY_6, KEY_7, KEY_9, KEY_0, KEY_BACKSPACE, SPITZ_KEY_EXOK, SPITZ_KEY_EXCANCEL, 0, 0, 0, 0, 0,  /* 1-16 */
  55         0, KEY_2, KEY_4, KEY_R, KEY_Y, KEY_8, KEY_I, KEY_O, KEY_P, SPITZ_KEY_EXJOGDOWN, SPITZ_KEY_EXJOGUP, 0, 0, 0, 0, 0, /* 17-32 */
  56         KEY_TAB, KEY_Q, KEY_E, KEY_T, KEY_G, KEY_U, KEY_J, KEY_K, 0, 0, 0, 0, 0, 0, 0, 0,                                 /* 33-48 */
  57         SPITZ_KEY_ADDRESS, KEY_W, KEY_S, KEY_F, KEY_V, KEY_H, KEY_M, KEY_L, 0, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 0,         /* 49-64 */
  58         SPITZ_KEY_CALENDER, KEY_A, KEY_D, KEY_C, KEY_B, KEY_N, KEY_DOT, 0, KEY_ENTER, KEY_LEFTSHIFT, 0, 0, 0, 0, 0, 0,    /* 65-80 */
  59         SPITZ_KEY_MAIL, KEY_Z, KEY_X, KEY_MINUS, KEY_SPACE, KEY_COMMA, 0, KEY_UP, 0, 0, SPITZ_KEY_FN, 0, 0, 0, 0, 0,      /* 81-96 */
  60         KEY_SYSRQ, SPITZ_KEY_JAP1, SPITZ_KEY_JAP2, SPITZ_KEY_CANCEL, SPITZ_KEY_OK, SPITZ_KEY_MENU, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0, 0, 0, 0  /* 97-112 */
  61 };
  62
  63 static int spitz_strobes[] = {
  64         SPITZ_GPIO_KEY_STROBE0,
  65         SPITZ_GPIO_KEY_STROBE1,
  66         SPITZ_GPIO_KEY_STROBE2,
  67         SPITZ_GPIO_KEY_STROBE3,
  68         SPITZ_GPIO_KEY_STROBE4,
  69         SPITZ_GPIO_KEY_STROBE5,
  70         SPITZ_GPIO_KEY_STROBE6,
  71         SPITZ_GPIO_KEY_STROBE7,
  72         SPITZ_GPIO_KEY_STROBE8,
  73         SPITZ_GPIO_KEY_STROBE9,
  74         SPITZ_GPIO_KEY_STROBE10,
  75 };
  76
  77 static int spitz_senses[] = {
  78         SPITZ_GPIO_KEY_SENSE0,
  79         SPITZ_GPIO_KEY_SENSE1,
  80         SPITZ_GPIO_KEY_SENSE2,
  81         SPITZ_GPIO_KEY_SENSE3,
  82         SPITZ_GPIO_KEY_SENSE4,
  83         SPITZ_GPIO_KEY_SENSE5,
  84         SPITZ_GPIO_KEY_SENSE6,
  85 };
  86
  87 struct spitzkbd {
  88         unsigned char keycode[ARRAY_SIZE(spitzkbd_keycode)];
  89         struct input_dev *input;
  90         char phys[32];
  91
  92         spinlock_t lock;
  93         struct timer_list timer;
  94         struct timer_list htimer;
  95
  96         unsigned int suspended;
  97         unsigned long suspend_jiffies;
  98 };
  99
 100 #define KB_DISCHARGE_DELAY      10
 101 #define KB_ACTIVATE_DELAY       10
 102
 103 /* Helper functions for reading the keyboard matrix
 104  * Note: We should really be using pxa_gpio_mode to alter GPDR but it
 105  *       requires a function call per GPIO bit which is excessive
 106  *       when we need to access 11 bits at once, multiple times.
 107  * These functions must be called within local_irq_save()/local_irq_restore()
 108  * or similar.
 109  */
 110 static inline void spitzkbd_discharge_all(void)
 111 {
 112         /* STROBE All HiZ */
 113         GPCR0  =  SPITZ_GPIO_G0_STROBE_BIT;
 114         GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 115         GPCR1  =  SPITZ_GPIO_G1_STROBE_BIT;
 116         GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 117         GPCR2  =  SPITZ_GPIO_G2_STROBE_BIT;
 118         GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 119         GPCR3  =  SPITZ_GPIO_G3_STROBE_BIT;
 120         GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 121 }
 122
 123 static inline void spitzkbd_activate_all(void)
 124 {
 125         /* STROBE ALL -> High */
 126         GPSR0  =  SPITZ_GPIO_G0_STROBE_BIT;
 127         GPDR0 |=  SPITZ_GPIO_G0_STROBE_BIT;
 128         GPSR1  =  SPITZ_GPIO_G1_STROBE_BIT;
 129         GPDR1 |=  SPITZ_GPIO_G1_STROBE_BIT;
 130         GPSR2  =  SPITZ_GPIO_G2_STROBE_BIT;
 131         GPDR2 |=  SPITZ_GPIO_G2_STROBE_BIT;
 132         GPSR3  =  SPITZ_GPIO_G3_STROBE_BIT;
 133         GPDR3 |=  SPITZ_GPIO_G3_STROBE_BIT;
 134
 135         udelay(KB_DISCHARGE_DELAY);
 136
 137         /* Clear any interrupts we may have triggered when altering the GPIO lines */
 138         GEDR0 = SPITZ_GPIO_G0_SENSE_BIT;
 139         GEDR1 = SPITZ_GPIO_G1_SENSE_BIT;
 140         GEDR2 = SPITZ_GPIO_G2_SENSE_BIT;
 141         GEDR3 = SPITZ_GPIO_G3_SENSE_BIT;
 142 }
 143
 144 static inline void spitzkbd_activate_col(int col)
 145 {
 146         int gpio = spitz_strobes[col];
 147         GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 148         GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 149         GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 150         GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 151         GPSR(gpio) = GPIO_bit(gpio);
 152         GPDR(gpio) |= GPIO_bit(gpio);
 153 }
 154
 155 static inline void spitzkbd_reset_col(int col)
 156 {
 157         int gpio = spitz_strobes[col];
 158         GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 159         GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 160         GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 161         GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 162         GPCR(gpio) = GPIO_bit(gpio);
 163         GPDR(gpio) |= GPIO_bit(gpio);
 164 }
 165
 166 static inline int spitzkbd_get_row_status(int col)
 167 {
 168         return ((GPLR0 >> 12) & 0x01) | ((GPLR0 >> 16) & 0x02)
 169                 | ((GPLR2 >> 25) & 0x04) | ((GPLR1 << 1) & 0x08)
 170                 | ((GPLR1 >> 0) & 0x10) | ((GPLR1 >> 1) & 0x60);
 171 }
 172
 173 /*
 174  * The spitz keyboard only generates interrupts when a key is pressed.
 175  * When a key is pressed, we enable a timer which then scans the
 176  * keyboard to detect when the key is released.
 177  */
 178
 179 /* Scan the hardware keyboard and push any changes up through the input layer */
 180 static void spitzkbd_scankeyboard(struct spitzkbd *spitzkbd_data)
 181 {
 182         unsigned int row, col, rowd;
 183         unsigned long flags;
 184         unsigned int num_pressed, pwrkey = ((GPLR(SPITZ_GPIO_ON_KEY) & GPIO_bit(SPITZ_GPIO_ON_KEY)) != 0);
 185
 186         if (spitzkbd_data->suspended)
 187                 return;
 188
 189         spin_lock_irqsave(&spitzkbd_data->lock, flags);
 190
 191         num_pressed = 0;
 192         for (col = 0; col < KB_COLS; col++) {
 193                 /*
 194                  * Discharge the output driver capacitatance
 195                  * in the keyboard matrix. (Yes it is significant..)
 196                  */
 197
 198                 spitzkbd_discharge_all();
 199                 udelay(KB_DISCHARGE_DELAY);
 200
 201                 spitzkbd_activate_col(col);
 202                 udelay(KB_ACTIVATE_DELAY);
 203
 204                 rowd = spitzkbd_get_row_status(col);
 205                 for (row = 0; row < KB_ROWS; row++) {
 206                         unsigned int scancode, pressed;
 207
 208                         scancode = SCANCODE(row, col);
 209                         pressed = rowd & KB_ROWMASK(row);
 210
 211                         input_report_key(spitzkbd_data->input, spitzkbd_data->keycode[scancode], pressed);
 212
 213                         if (pressed)
 214                                 num_pressed++;
 215                 }
 216                 spitzkbd_reset_col(col);
 217         }
 218
 219         spitzkbd_activate_all();
 220
 221         input_report_key(spitzkbd_data->input, SPITZ_KEY_SYNC, (GPLR(SPITZ_GPIO_SYNC) & GPIO_bit(SPITZ_GPIO_SYNC)) != 0 );
 222         input_report_key(spitzkbd_data->input, KEY_SUSPEND, pwrkey);
 223
 224         if (pwrkey && time_after(jiffies, spitzkbd_data->suspend_jiffies + msecs_to_jiffies(1000))) {
 225                 input_event(spitzkbd_data->input, EV_PWR, KEY_SUSPEND, 1);
 226                 spitzkbd_data->suspend_jiffies = jiffies;
 227         }
 228
 229         input_sync(spitzkbd_data->input);
 230
 231         /* if any keys are pressed, enable the timer */
 232         if (num_pressed)
 233                 mod_timer(&spitzkbd_data->timer, jiffies + msecs_to_jiffies(SCAN_INTERVAL));
 234
 235         spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
 236 }
 237
 238 /*
 239  * spitz keyboard interrupt handler.
 240  */
 241 static irqreturn_t spitzkbd_interrupt(int irq, void *dev_id)
 242 {
 243         struct spitzkbd *spitzkbd_data = dev_id;
 244
 245         if (!timer_pending(&spitzkbd_data->timer)) {
 246                 /** wait chattering delay **/
 247                 udelay(20);
 248                 spitzkbd_scankeyboard(spitzkbd_data);
 249         }
 250
 251         return IRQ_HANDLED;
 252 }
 253
 254 /*
 255  * spitz timer checking for released keys
 256  */
 257 static void spitzkbd_timer_callback(unsigned long data)
 258 {
 259         struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
 260
 261         spitzkbd_scankeyboard(spitzkbd_data);
 262 }
 263
 264 /*
 265  * The hinge switches generate an interrupt.
 266  * We debounce the switches and pass them to the input system.
 267  */
 268
 269 static irqreturn_t spitzkbd_hinge_isr(int irq, void *dev_id)
 270 {
 271         struct spitzkbd *spitzkbd_data = dev_id;
 272
 273         if (!timer_pending(&spitzkbd_data->htimer))
 274                 mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
 275
 276         return IRQ_HANDLED;
 277 }
 278
 279 #define HINGE_STABLE_COUNT 2
 280 static int sharpsl_hinge_state;
 281 static int hinge_count;
 282
 283 static void spitzkbd_hinge_timer(unsigned long data)
 284 {
 285         struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
 286         unsigned long state;
 287         unsigned long flags;
 288
 289         state = GPLR(SPITZ_GPIO_SWA) & (GPIO_bit(SPITZ_GPIO_SWA)|GPIO_bit(SPITZ_GPIO_SWB));
 290         state |= (GPLR(SPITZ_GPIO_AK_INT) & GPIO_bit(SPITZ_GPIO_AK_INT));
 291         if (state != sharpsl_hinge_state) {
 292                 hinge_count = 0;
 293                 sharpsl_hinge_state = state;
 294         } else if (hinge_count < HINGE_STABLE_COUNT) {
 295                 hinge_count++;
 296         }
 297
 298         if (hinge_count >= HINGE_STABLE_COUNT) {
 299                 spin_lock_irqsave(&spitzkbd_data->lock, flags);
 300
 301                 input_report_switch(spitzkbd_data->input, SW_LID, ((GPLR(SPITZ_GPIO_SWA) & GPIO_bit(SPITZ_GPIO_SWA)) != 0));
 302                 input_report_switch(spitzkbd_data->input, SW_TABLET_MODE, ((GPLR(SPITZ_GPIO_SWB) & GPIO_bit(SPITZ_GPIO_SWB)) != 0));
 303                 input_report_switch(spitzkbd_data->input, SW_HEADPHONE_INSERT, ((GPLR(SPITZ_GPIO_AK_INT) & GPIO_bit(SPITZ_GPIO_AK_INT)) != 0));
 304                 input_sync(spitzkbd_data->input);
 305
 306                 spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
 307         } else {
 308                 mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
 309         }
 310 }
 311
 312 #ifdef CONFIG_PM
 313 static int spitzkbd_suspend(struct platform_device *dev, pm_message_t state)
 314 {
 315         int i;
 316         struct spitzkbd *spitzkbd = platform_get_drvdata(dev);
 317         spitzkbd->suspended = 1;
 318
 319         /* Set Strobe lines as inputs - *except* strobe line 0 leave this
 320            enabled so we can detect a power button press for resume */
 321         for (i = 1; i < SPITZ_KEY_STROBE_NUM; i++)
 322                 pxa_gpio_mode(spitz_strobes[i] | GPIO_IN);
 323
 324         return 0;
 325 }
 326
 327 static int spitzkbd_resume(struct platform_device *dev)
 328 {
 329         int i;
 330         struct spitzkbd *spitzkbd = platform_get_drvdata(dev);
 331
 332         for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
 333                 pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
 334
 335         /* Upon resume, ignore the suspend key for a short while */
 336         spitzkbd->suspend_jiffies = jiffies;
 337         spitzkbd->suspended = 0;
 338
 339         return 0;
 340 }
 341 #else
 342 #define spitzkbd_suspend        NULL
 343 #define spitzkbd_resume         NULL
 344 #endif
 345
 346 static int __init spitzkbd_probe(struct platform_device *dev)
 347 {
 348         struct spitzkbd *spitzkbd;
 349         struct input_dev *input_dev;
 350         int i, err = -ENOMEM;
 351
 352         spitzkbd = kzalloc(sizeof(struct spitzkbd), GFP_KERNEL);
 353         input_dev = input_allocate_device();
 354         if (!spitzkbd || !input_dev)
 355                 goto fail;
 356
 357         platform_set_drvdata(dev, spitzkbd);
 358         strcpy(spitzkbd->phys, "spitzkbd/input0");
 359
 360         spin_lock_init(&spitzkbd->lock);
 361
 362         /* Init Keyboard rescan timer */
 363         init_timer(&spitzkbd->timer);
 364         spitzkbd->timer.function = spitzkbd_timer_callback;
 365         spitzkbd->timer.data = (unsigned long) spitzkbd;
 366
 367         /* Init Hinge Timer */
 368         init_timer(&spitzkbd->htimer);
 369         spitzkbd->htimer.function = spitzkbd_hinge_timer;
 370         spitzkbd->htimer.data = (unsigned long) spitzkbd;
 371
 372         spitzkbd->suspend_jiffies = jiffies;
 373
 374         spitzkbd->input = input_dev;
 375
 376         input_dev->name = "Spitz Keyboard";
 377         input_dev->phys = spitzkbd->phys;
 378         input_dev->dev.parent = &dev->dev;
 379
 380         input_dev->id.bustype = BUS_HOST;
 381         input_dev->id.vendor = 0x0001;
 382         input_dev->id.product = 0x0001;
 383         input_dev->id.version = 0x0100;
 384
 385         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
 386                 BIT_MASK(EV_PWR) | BIT_MASK(EV_SW);
 387         input_dev->keycode = spitzkbd->keycode;
 388         input_dev->keycodesize = sizeof(unsigned char);
 389         input_dev->keycodemax = ARRAY_SIZE(spitzkbd_keycode);
 390
 391         memcpy(spitzkbd->keycode, spitzkbd_keycode, sizeof(spitzkbd->keycode));
 392         for (i = 0; i < ARRAY_SIZE(spitzkbd_keycode); i++)
 393                 set_bit(spitzkbd->keycode[i], input_dev->keybit);
 394         clear_bit(0, input_dev->keybit);
 395         set_bit(KEY_SUSPEND, input_dev->keybit);
 396         set_bit(SW_LID, input_dev->swbit);
 397         set_bit(SW_TABLET_MODE, input_dev->swbit);
 398         set_bit(SW_HEADPHONE_INSERT, input_dev->swbit);
 399
 400         err = input_register_device(input_dev);
 401         if (err)
 402                 goto fail;
 403
 404         mod_timer(&spitzkbd->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
 405
 406         /* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
 407         for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++) {
 408                 pxa_gpio_mode(spitz_senses[i] | GPIO_IN);
 409                 if (request_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd_interrupt,
 410                                 IRQF_DISABLED|IRQF_TRIGGER_RISING,
 411                                 "Spitzkbd Sense", spitzkbd))
 412                         printk(KERN_WARNING "spitzkbd: Can't get Sense IRQ: %d!\n", i);
 413         }
 414
 415         /* Set Strobe lines as outputs - set high */
 416         for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
 417                 pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
 418
 419         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
 420         pxa_gpio_mode(SPITZ_GPIO_ON_KEY | GPIO_IN);
 421         pxa_gpio_mode(SPITZ_GPIO_SWA | GPIO_IN);
 422         pxa_gpio_mode(SPITZ_GPIO_SWB | GPIO_IN);
 423
 424         request_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd_interrupt,
 425                     IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 426                     "Spitzkbd Sync", spitzkbd);
 427         request_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd_interrupt,
 428                     IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 429                     "Spitzkbd PwrOn", spitzkbd);
 430         request_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd_hinge_isr,
 431                     IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 432                     "Spitzkbd SWA", spitzkbd);
 433         request_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd_hinge_isr,
 434                     IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 435                     "Spitzkbd SWB", spitzkbd);
 436         request_irq(SPITZ_IRQ_GPIO_AK_INT, spitzkbd_hinge_isr,
 437                     IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 438                     "Spitzkbd HP", spitzkbd);
 439
 440         return 0;
 441
 442  fail:  input_free_device(input_dev);
 443         kfree(spitzkbd);
 444         return err;
 445 }
 446
 447 static int spitzkbd_remove(struct platform_device *dev)
 448 {
 449         int i;
 450         struct spitzkbd *spitzkbd = platform_get_drvdata(dev);
 451
 452         for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++)
 453                 free_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd);
 454
 455         free_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd);
 456         free_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd);
 457         free_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd);
 458         free_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd);
 459         free_irq(SPITZ_IRQ_GPIO_AK_INT, spitzkbd);
 460
 461         del_timer_sync(&spitzkbd->htimer);
 462         del_timer_sync(&spitzkbd->timer);
 463
 464         input_unregister_device(spitzkbd->input);
 465
 466         kfree(spitzkbd);
 467
 468         return 0;
 469 }
 470
 471 static struct platform_driver spitzkbd_driver = {
 472         .probe          = spitzkbd_probe,
 473         .remove         = spitzkbd_remove,
 474         .suspend        = spitzkbd_suspend,
 475         .resume         = spitzkbd_resume,
 476         .driver         = {
 477                 .name   = "spitz-keyboard",
 478                 .owner  = THIS_MODULE,
 479         },
 480 };
 481
 482 static int __devinit spitzkbd_init(void)
 483 {
 484         return platform_driver_register(&spitzkbd_driver);
 485 }
 486
 487 static void __exit spitzkbd_exit(void)
 488 {
 489         platform_driver_unregister(&spitzkbd_driver);
 490 }
 491
 492 module_init(spitzkbd_init);
 493 module_exit(spitzkbd_exit);
 494
 495 MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
 496 MODULE_DESCRIPTION("Spitz Keyboard Driver");
 497 MODULE_LICENSE("GPL v2");
 498 MODULE_ALIAS("platform:spitz-keyboard");