target/linux/omap24xx/patches-3.3/200-omap-platform.patch

   1 --- /dev/null
   2 +++ b/arch/arm/plat-omap/bootreason.c
   3 @@ -0,0 +1,79 @@
   4 +/*
   5 + * linux/arch/arm/plat-omap/bootreason.c
   6 + *
   7 + * OMAP Bootreason passing
   8 + *
   9 + * Copyright (c) 2004 Nokia
  10 + *
  11 + * Written by David Weinehall <david.weinehall@nokia.com>
  12 + *
  13 + * This program is free software; you can redistribute it and/or modify it
  14 + * under the terms of the GNU General Public License as published by the
  15 + * Free Software Foundation; either version 2 of the License, or (at your
  16 + * option) any later version.
  17 + *
  18 + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  19 + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  20 + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  21 + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22 + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23 + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24 + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  25 + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27 + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 + *
  29 + * You should have received a copy of the GNU General Public License along
  30 + * with this program; if not, write to the Free Software Foundation, Inc.,
  31 + * 675 Mass Ave, Cambridge, MA 02139, USA.
  32 + */
  33 +#include <linux/proc_fs.h>
  34 +#include <linux/errno.h>
  35 +#include <plat/board.h>
  36 +
  37 +static char boot_reason[16];
  38 +
  39 +static int omap_bootreason_read_proc(char *page, char **start, off_t off,
  40 +                                        int count, int *eof, void *data)
  41 +{
  42 +       int len = 0;
  43 +
  44 +       len += sprintf(page + len, "%s\n", boot_reason);
  45 +
  46 +       *start = page + off;
  47 +
  48 +       if (len > off)
  49 +               len -= off;
  50 +       else
  51 +               len = 0;
  52 +
  53 +       return len < count ? len  : count;
  54 +}
  55 +
  56 +static int __init bootreason_init(void)
  57 +{
  58 +       const struct omap_boot_reason_config *cfg;
  59 +       int reason_valid = 0;
  60 +
  61 +       cfg = omap_get_config(OMAP_TAG_BOOT_REASON, struct omap_boot_reason_config);
  62 +       if (cfg != NULL) {
  63 +               strncpy(boot_reason, cfg->reason_str, sizeof(cfg->reason_str));
  64 +               boot_reason[sizeof(cfg->reason_str)] = 0;
  65 +               reason_valid = 1;
  66 +       } else {
  67 +               /* Read the boot reason from the OMAP registers */
  68 +       }
  69 +
  70 +       if (!reason_valid)
  71 +               return -ENOENT;
  72 +
  73 +       printk(KERN_INFO "Bootup reason: %s\n", boot_reason);
  74 +
  75 +       if (!create_proc_read_entry("bootreason", S_IRUGO, NULL,
  76 +                                       omap_bootreason_read_proc, NULL))
  77 +               return -ENOMEM;
  78 +
  79 +       return 0;
  80 +}
  81 +
  82 +late_initcall(bootreason_init);
  83 --- a/arch/arm/plat-omap/common.c
  84 +++ b/arch/arm/plat-omap/common.c
  85 @@ -24,18 +24,90 @@
  86
  87  #include <plat/omap-secure.h>
  88
  89 +#include <asm/setup.h>
  90 +
  91
  92  #define NO_LENGTH_CHECK 0xffffffff
  93
  94  struct omap_board_config_kernel *omap_board_config __initdata;
  95  int omap_board_config_size;
  96
  97 +unsigned char omap_bootloader_tag[1024];
  98 +int omap_bootloader_tag_len;
  99 +
 100 +/* used by omap-smp.c and board-4430sdp.c */
 101 +void __iomem *gic_cpu_base_addr;
 102 +
 103 +#ifdef CONFIG_OMAP_BOOT_TAG
 104 +
 105 +static int __init parse_tag_omap(const struct tag *tag)
 106 +{
 107 +       u32 size = tag->hdr.size - (sizeof(tag->hdr) >> 2);
 108 +
 109 +        size <<= 2;
 110 +       if (size > sizeof(omap_bootloader_tag))
 111 +               return -1;
 112 +
 113 +       memcpy(omap_bootloader_tag, tag->u.omap.data, size);
 114 +       omap_bootloader_tag_len = size;
 115 +
 116 +        return 0;
 117 +}
 118 +
 119 +__tagtable(ATAG_BOARD, parse_tag_omap);
 120 +
 121 +#endif
 122 +
 123  static const void *__init get_config(u16 tag, size_t len,
 124                 int skip, size_t *len_out)
 125  {
 126         struct omap_board_config_kernel *kinfo = NULL;
 127         int i;
 128
 129 +#ifdef CONFIG_OMAP_BOOT_TAG
 130 +       struct omap_board_config_entry *info = NULL;
 131 +
 132 +       if (omap_bootloader_tag_len > 4)
 133 +               info = (struct omap_board_config_entry *) omap_bootloader_tag;
 134 +       while (info != NULL) {
 135 +               u8 *next;
 136 +
 137 +               if (info->tag == tag) {
 138 +                       if (skip == 0)
 139 +                               break;
 140 +                       skip--;
 141 +               }
 142 +
 143 +               if ((info->len & 0x03) != 0) {
 144 +                       /* We bail out to avoid an alignment fault */
 145 +                       printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
 146 +                              info->len, info->tag);
 147 +                       return NULL;
 148 +               }
 149 +               next = (u8 *) info + sizeof(*info) + info->len;
 150 +               if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
 151 +                       info = NULL;
 152 +               else
 153 +                       info = (struct omap_board_config_entry *) next;
 154 +       }
 155 +       if (info != NULL) {
 156 +               /* Check the length as a lame attempt to check for
 157 +                * binary inconsistency. */
 158 +               if (len != NO_LENGTH_CHECK) {
 159 +                       /* Word-align len */
 160 +                       if (len & 0x03)
 161 +                               len = (len + 3) & ~0x03;
 162 +                       if (info->len != len) {
 163 +                               printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
 164 +                                      tag, len, info->len);
 165 +                               return NULL;
 166 +                       }
 167 +               }
 168 +               if (len_out != NULL)
 169 +                       *len_out = info->len;
 170 +               return info->data;
 171 +       }
 172 +#endif
 173         /* Try to find the config from the board-specific structures
 174          * in the kernel. */
 175         for (i = 0; i < omap_board_config_size; i++) {
 176 --- /dev/null
 177 +++ b/arch/arm/plat-omap/component-version.c
 178 @@ -0,0 +1,64 @@
 179 +/*
 180 + *  linux/arch/arm/plat-omap/component-version.c
 181 + *
 182 + *  Copyright (C) 2005 Nokia Corporation
 183 + *  Written by Juha Yrjölä <juha.yrjola@nokia.com>
 184 + *
 185 + * This program is free software; you can redistribute it and/or modify
 186 + * it under the terms of the GNU General Public License version 2 as
 187 + * published by the Free Software Foundation.
 188 + */
 189 +
 190 +#include <linux/init.h>
 191 +#include <linux/module.h>
 192 +#include <linux/err.h>
 193 +#include <linux/proc_fs.h>
 194 +#include <plat/board.h>
 195 +
 196 +static int component_version_read_proc(char *page, char **start, off_t off,
 197 +                                      int count, int *eof, void *data)
 198 +{
 199 +       int len, i;
 200 +       const struct omap_version_config *ver;
 201 +       char *p;
 202 +
 203 +       i = 0;
 204 +       p = page;
 205 +       while ((ver = omap_get_nr_config(OMAP_TAG_VERSION_STR,
 206 +                                        struct omap_version_config, i)) != NULL) {
 207 +               p += sprintf(p, "%-12s%s\n", ver->component, ver->version);
 208 +               i++;
 209 +       }
 210 +
 211 +       len = (p - page) - off;
 212 +       if (len < 0)
 213 +               len = 0;
 214 +
 215 +       *eof = (len <= count) ? 1 : 0;
 216 +       *start = page + off;
 217 +
 218 +       return len;
 219 +}
 220 +
 221 +static int __init component_version_init(void)
 222 +{
 223 +       if (omap_get_config(OMAP_TAG_VERSION_STR, struct omap_version_config) == NULL)
 224 +               return -ENODEV;
 225 +       if (!create_proc_read_entry("component_version", S_IRUGO, NULL,
 226 +                                   component_version_read_proc, NULL))
 227 +               return -ENOMEM;
 228 +
 229 +       return 0;
 230 +}
 231 +
 232 +static void __exit component_version_exit(void)
 233 +{
 234 +       remove_proc_entry("component_version", NULL);
 235 +}
 236 +
 237 +late_initcall(component_version_init);
 238 +module_exit(component_version_exit);
 239 +
 240 +MODULE_AUTHOR("Juha Yrjölä <juha.yrjola@nokia.com>");
 241 +MODULE_DESCRIPTION("Component version driver");
 242 +MODULE_LICENSE("GPL");
 243 --- a/arch/arm/plat-omap/Kconfig
 244 +++ b/arch/arm/plat-omap/Kconfig
 245 @@ -84,6 +84,38 @@ config OMAP_RESET_CLOCKS
 246           probably do not want this option enabled until your
 247           device drivers work properly.
 248
 249 +config OMAP_BOOT_TAG
 250 +       bool "OMAP bootloader information passing"
 251 +        depends on ARCH_OMAP
 252 +        default n
 253 +        help
 254 +          Say Y, if you have a bootloader which passes information
 255 +          about your board and its peripheral configuration.
 256 +
 257 +config OMAP_BOOT_REASON
 258 +       bool "Support for boot reason"
 259 +        depends on OMAP_BOOT_TAG
 260 +        default n
 261 +        help
 262 +          Say Y, if you want to have a procfs entry for reading the boot
 263 +          reason in user-space.
 264 +
 265 +config OMAP_COMPONENT_VERSION
 266 +       bool "Support for component version display"
 267 +       depends on OMAP_BOOT_TAG && PROC_FS
 268 +       default n
 269 +       help
 270 +         Say Y, if you want to have a procfs entry for reading component
 271 +         versions (supplied by the bootloader) in user-space.
 272 +
 273 +config OMAP_GPIO_SWITCH
 274 +       bool "GPIO switch support"
 275 +       help
 276 +         Say Y, if you want to have support for reporting of GPIO
 277 +         switches (e.g. cover switches) via sysfs. Your bootloader has
 278 +         to provide information about the switches to the kernel via the
 279 +         ATAG_BOARD mechanism if they're not defined by the board config.
 280 +
 281  config OMAP_MUX
 282         bool "OMAP multiplexing support"
 283         depends on ARCH_OMAP
 284 --- a/arch/arm/plat-omap/Makefile
 285 +++ b/arch/arm/plat-omap/Makefile
 286 @@ -20,6 +20,9 @@ obj-$(CONFIG_ARCH_OMAP4) += omap_device.
 287  obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
 288
 289  obj-$(CONFIG_OMAP_DM_TIMER) += dmtimer.o
 290 +obj-$(CONFIG_OMAP_BOOT_REASON) += bootreason.o
 291 +obj-$(CONFIG_OMAP_COMPONENT_VERSION) += component-version.o
 292 +obj-$(CONFIG_OMAP_GPIO_SWITCH) += gpio-switch.o
 293  obj-$(CONFIG_OMAP_DEBUG_DEVICES) += debug-devices.o
 294  obj-$(CONFIG_OMAP_DEBUG_LEDS) += debug-leds.o
 295  i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o
 296 --- a/arch/arm/include/asm/setup.h
 297 +++ b/arch/arm/include/asm/setup.h
 298 @@ -136,6 +136,13 @@ struct tag_acorn {
 299         __u8 adfsdrives;
 300  };
 301
 302 +/* TI OMAP specific information */
 303 +#define ATAG_BOARD       0x414f4d50
 304 +
 305 +struct tag_omap {
 306 +       u8 data[0];
 307 +};
 308 +
 309  /* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
 310  #define ATAG_MEMCLK    0x41000402
 311
 312 @@ -162,6 +169,11 @@ struct tag {
 313                 struct tag_acorn        acorn;
 314
 315                 /*
 316 +                * OMAP specific
 317 +                 */
 318 +                struct tag_omap         omap;
 319 +
 320 +               /*
 321                  * DC21285 specific
 322                  */
 323                 struct tag_memclk       memclk;
 324 --- /dev/null
 325 +++ b/arch/arm/plat-omap/gpio-switch.c
 326 @@ -0,0 +1,554 @@
 327 +/*
 328 + *  linux/arch/arm/plat-omap/gpio-switch.c
 329 + *
 330 + *  Copyright (C) 2004-2006 Nokia Corporation
 331 + *  Written by Juha Yrjölä <juha.yrjola@nokia.com>
 332 + *         and Paul Mundt <paul.mundt@nokia.com>
 333 + *
 334 + * This program is free software; you can redistribute it and/or modify
 335 + * it under the terms of the GNU General Public License version 2 as
 336 + * published by the Free Software Foundation.
 337 + */
 338 +
 339 +#include <linux/sched.h>
 340 +#include <linux/init.h>
 341 +#include <linux/list.h>
 342 +#include <linux/irq.h>
 343 +#include <linux/interrupt.h>
 344 +#include <linux/module.h>
 345 +#include <linux/platform_device.h>
 346 +#include <linux/timer.h>
 347 +#include <linux/err.h>
 348 +#include <linux/slab.h>
 349 +#include <linux/gpio.h>
 350 +#include <plat/hardware.h>
 351 +#include <plat/irqs.h>
 352 +#include <plat/mux.h>
 353 +#include <plat/board.h>
 354 +#include <plat/gpio-switch.h>
 355 +
 356 +struct gpio_switch {
 357 +       char            name[14];
 358 +       u16             gpio;
 359 +       unsigned        flags:4;
 360 +       unsigned        type:4;
 361 +       unsigned        state:1;
 362 +       unsigned        both_edges:1;
 363 +
 364 +       u16             debounce_rising;
 365 +       u16             debounce_falling;
 366 +
 367 +       void (* notify)(void *data, int state);
 368 +       void *notify_data;
 369 +
 370 +       struct work_struct      work;
 371 +       struct timer_list       timer;
 372 +       struct platform_device  pdev;
 373 +
 374 +       struct list_head        node;
 375 +};
 376 +
 377 +static LIST_HEAD(gpio_switches);
 378 +static struct platform_device *gpio_sw_platform_dev;
 379 +static struct platform_driver gpio_sw_driver;
 380 +
 381 +static const struct omap_gpio_switch *board_gpio_sw_table;
 382 +static int board_gpio_sw_count;
 383 +
 384 +static const char *cover_str[2] = { "open", "closed" };
 385 +static const char *connection_str[2] = { "disconnected", "connected" };
 386 +static const char *activity_str[2] = { "inactive", "active" };
 387 +
 388 +/*
 389 + * GPIO switch state default debounce delay in ms
 390 + */
 391 +#define OMAP_GPIO_SW_DEFAULT_DEBOUNCE          10
 392 +
 393 +static const char **get_sw_str(struct gpio_switch *sw)
 394 +{
 395 +       switch (sw->type) {
 396 +       case OMAP_GPIO_SWITCH_TYPE_COVER:
 397 +               return cover_str;
 398 +       case OMAP_GPIO_SWITCH_TYPE_CONNECTION:
 399 +               return connection_str;
 400 +       case OMAP_GPIO_SWITCH_TYPE_ACTIVITY:
 401 +               return activity_str;
 402 +       default:
 403 +               BUG();
 404 +               return NULL;
 405 +       }
 406 +}
 407 +
 408 +static const char *get_sw_type(struct gpio_switch *sw)
 409 +{
 410 +       switch (sw->type) {
 411 +       case OMAP_GPIO_SWITCH_TYPE_COVER:
 412 +               return "cover";
 413 +       case OMAP_GPIO_SWITCH_TYPE_CONNECTION:
 414 +               return "connection";
 415 +       case OMAP_GPIO_SWITCH_TYPE_ACTIVITY:
 416 +               return "activity";
 417 +       default:
 418 +               BUG();
 419 +               return NULL;
 420 +       }
 421 +}
 422 +
 423 +static void print_sw_state(struct gpio_switch *sw, int state)
 424 +{
 425 +       const char **str;
 426 +
 427 +       str = get_sw_str(sw);
 428 +       if (str != NULL)
 429 +               printk(KERN_INFO "%s (GPIO %d) is now %s\n", sw->name, sw->gpio, str[state]);
 430 +}
 431 +
 432 +static int gpio_sw_get_state(struct gpio_switch *sw)
 433 +{
 434 +       int state;
 435 +
 436 +       state = gpio_get_value(sw->gpio);
 437 +       if (sw->flags & OMAP_GPIO_SWITCH_FLAG_INVERTED)
 438 +               state = !state;
 439 +
 440 +       return state;
 441 +}
 442 +
 443 +static ssize_t gpio_sw_state_store(struct device *dev,
 444 +                                  struct device_attribute *attr,
 445 +                                  const char *buf,
 446 +                                  size_t count)
 447 +{
 448 +       struct gpio_switch *sw = dev_get_drvdata(dev);
 449 +       const char **str;
 450 +       char state[16];
 451 +       int enable;
 452 +
 453 +       if (!(sw->flags & OMAP_GPIO_SWITCH_FLAG_OUTPUT))
 454 +               return -EPERM;
 455 +
 456 +       if (sscanf(buf, "%15s", state) != 1)
 457 +               return -EINVAL;
 458 +
 459 +       str = get_sw_str(sw);
 460 +       if (strcmp(state, str[0]) == 0)
 461 +               sw->state = enable = 0;
 462 +       else if (strcmp(state, str[1]) == 0)
 463 +               sw->state = enable = 1;
 464 +       else
 465 +               return -EINVAL;
 466 +
 467 +       if (sw->flags & OMAP_GPIO_SWITCH_FLAG_INVERTED)
 468 +               enable = !enable;
 469 +       gpio_set_value(sw->gpio, enable);
 470 +
 471 +       return count;
 472 +}
 473 +
 474 +static ssize_t gpio_sw_state_show(struct device *dev,
 475 +                                 struct device_attribute *attr,
 476 +                                 char *buf)
 477 +{
 478 +       struct gpio_switch *sw = dev_get_drvdata(dev);
 479 +       const char **str;
 480 +
 481 +       str = get_sw_str(sw);
 482 +       return sprintf(buf, "%s\n", str[sw->state]);
 483 +}
 484 +
 485 +static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, gpio_sw_state_show,
 486 +                  gpio_sw_state_store);
 487 +
 488 +static ssize_t gpio_sw_type_show(struct device *dev,
 489 +                                struct device_attribute *attr,
 490 +                                char *buf)
 491 +{
 492 +       struct gpio_switch *sw = dev_get_drvdata(dev);
 493 +
 494 +       return sprintf(buf, "%s\n", get_sw_type(sw));
 495 +}
 496 +
 497 +static DEVICE_ATTR(type, S_IRUGO, gpio_sw_type_show, NULL);
 498 +
 499 +static ssize_t gpio_sw_direction_show(struct device *dev,
 500 +                                     struct device_attribute *attr,
 501 +                                     char *buf)
 502 +{
 503 +       struct gpio_switch *sw = dev_get_drvdata(dev);
 504 +       int is_output;
 505 +
 506 +       is_output = sw->flags & OMAP_GPIO_SWITCH_FLAG_OUTPUT;
 507 +       return sprintf(buf, "%s\n", is_output ? "output" : "input");
 508 +}
 509 +
 510 +static DEVICE_ATTR(direction, S_IRUGO, gpio_sw_direction_show, NULL);
 511 +
 512 +
 513 +static irqreturn_t gpio_sw_irq_handler(int irq, void *arg)
 514 +{
 515 +       struct gpio_switch *sw = arg;
 516 +       unsigned long timeout;
 517 +       int state;
 518 +
 519 +       if (!sw->both_edges) {
 520 +               if (gpio_get_value(sw->gpio))
 521 +                       irq_set_irq_type(OMAP_GPIO_IRQ(sw->gpio), IRQ_TYPE_EDGE_FALLING);
 522 +               else
 523 +                       irq_set_irq_type(OMAP_GPIO_IRQ(sw->gpio), IRQ_TYPE_EDGE_RISING);
 524 +       }
 525 +
 526 +       state = gpio_sw_get_state(sw);
 527 +       if (sw->state == state)
 528 +               return IRQ_HANDLED;
 529 +
 530 +       if (state)
 531 +               timeout = sw->debounce_rising;
 532 +       else
 533 +               timeout = sw->debounce_falling;
 534 +       if (!timeout)
 535 +               schedule_work(&sw->work);
 536 +       else
 537 +               mod_timer(&sw->timer, jiffies + msecs_to_jiffies(timeout));
 538 +
 539 +       return IRQ_HANDLED;
 540 +}
 541 +
 542 +static void gpio_sw_timer(unsigned long arg)
 543 +{
 544 +       struct gpio_switch *sw = (struct gpio_switch *) arg;
 545 +
 546 +       schedule_work(&sw->work);
 547 +}
 548 +
 549 +static void gpio_sw_handler(struct work_struct *work)
 550 +{
 551 +       struct gpio_switch *sw = container_of(work, struct gpio_switch, work);
 552 +       int state;
 553 +
 554 +       state = gpio_sw_get_state(sw);
 555 +       if (sw->state == state)
 556 +               return;
 557 +
 558 +       sw->state = state;
 559 +       if (sw->notify != NULL)
 560 +               sw->notify(sw->notify_data, state);
 561 +       sysfs_notify(&sw->pdev.dev.kobj, NULL, "state");
 562 +       print_sw_state(sw, state);
 563 +}
 564 +
 565 +static int __init can_do_both_edges(struct gpio_switch *sw)
 566 +{
 567 +       if (!cpu_class_is_omap1())
 568 +               return 1;
 569 +       if (OMAP_GPIO_IS_MPUIO(sw->gpio))
 570 +               return 0;
 571 +       else
 572 +               return 1;
 573 +}
 574 +
 575 +static void gpio_sw_release(struct device *dev)
 576 +{
 577 +}
 578 +
 579 +static int __init new_switch(struct gpio_switch *sw)
 580 +{
 581 +       int r, direction, trigger;
 582 +
 583 +       switch (sw->type) {
 584 +       case OMAP_GPIO_SWITCH_TYPE_COVER:
 585 +       case OMAP_GPIO_SWITCH_TYPE_CONNECTION:
 586 +       case OMAP_GPIO_SWITCH_TYPE_ACTIVITY:
 587 +               break;
 588 +       default:
 589 +               printk(KERN_ERR "invalid GPIO switch type: %d\n", sw->type);
 590 +               return -EINVAL;
 591 +       }
 592 +
 593 +       sw->pdev.name   = sw->name;
 594 +       sw->pdev.id     = -1;
 595 +
 596 +       sw->pdev.dev.parent = &gpio_sw_platform_dev->dev;
 597 +       sw->pdev.dev.driver = &gpio_sw_driver.driver;
 598 +       sw->pdev.dev.release = gpio_sw_release;
 599 +
 600 +       r = platform_device_register(&sw->pdev);
 601 +       if (r) {
 602 +               printk(KERN_ERR "gpio-switch: platform device registration "
 603 +                      "failed for %s", sw->name);
 604 +               return r;
 605 +       }
 606 +       dev_set_drvdata(&sw->pdev.dev, sw);
 607 +
 608 +       r = gpio_request(sw->gpio, "gpio-switch");
 609 +       if (r < 0) {
 610 +               platform_device_unregister(&sw->pdev);
 611 +               return r;
 612 +       }
 613 +
 614 +       /* input: 1, output: 0 */
 615 +       direction = !(sw->flags & OMAP_GPIO_SWITCH_FLAG_OUTPUT);
 616 +       if (direction)
 617 +               gpio_direction_input(sw->gpio);
 618 +       else
 619 +               gpio_direction_output(sw->gpio, 0);
 620 +
 621 +       sw->state = gpio_sw_get_state(sw);
 622 +
 623 +       r = 0;
 624 +       r |= device_create_file(&sw->pdev.dev, &dev_attr_state);
 625 +       r |= device_create_file(&sw->pdev.dev, &dev_attr_type);
 626 +       r |= device_create_file(&sw->pdev.dev, &dev_attr_direction);
 627 +       if (r)
 628 +               printk(KERN_ERR "gpio-switch: attribute file creation "
 629 +                      "failed for %s\n", sw->name);
 630 +
 631 +       if (!direction)
 632 +               return 0;
 633 +
 634 +       if (can_do_both_edges(sw)) {
 635 +               trigger = IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING;
 636 +               sw->both_edges = 1;
 637 +       } else {
 638 +               if (gpio_get_value(sw->gpio))
 639 +                       trigger = IRQF_TRIGGER_FALLING;
 640 +               else
 641 +                       trigger = IRQF_TRIGGER_RISING;
 642 +       }
 643 +       r = request_irq(OMAP_GPIO_IRQ(sw->gpio), gpio_sw_irq_handler,
 644 +                       IRQF_SHARED | trigger, sw->name, sw);
 645 +       if (r < 0) {
 646 +               printk(KERN_ERR "gpio-switch: request_irq() failed "
 647 +                      "for GPIO %d\n", sw->gpio);
 648 +               platform_device_unregister(&sw->pdev);
 649 +               gpio_free(sw->gpio);
 650 +               return r;
 651 +       }
 652 +
 653 +       INIT_WORK(&sw->work, gpio_sw_handler);
 654 +       init_timer(&sw->timer);
 655 +
 656 +       sw->timer.function = gpio_sw_timer;
 657 +       sw->timer.data = (unsigned long)sw;
 658 +
 659 +       list_add(&sw->node, &gpio_switches);
 660 +
 661 +       return 0;
 662 +}
 663 +
 664 +static int __init add_atag_switches(void)
 665 +{
 666 +       const struct omap_gpio_switch_config *cfg;
 667 +       struct gpio_switch *sw;
 668 +       int i, r;
 669 +
 670 +       for (i = 0; ; i++) {
 671 +               cfg = omap_get_nr_config(OMAP_TAG_GPIO_SWITCH,
 672 +                                        struct omap_gpio_switch_config, i);
 673 +               if (cfg == NULL)
 674 +                       break;
 675 +               sw = kzalloc(sizeof(*sw), GFP_KERNEL);
 676 +               if (sw == NULL) {
 677 +                       printk(KERN_ERR "gpio-switch: kmalloc failed\n");
 678 +                       return -ENOMEM;
 679 +               }
 680 +               strncpy(sw->name, cfg->name, sizeof(cfg->name));
 681 +               sw->gpio = cfg->gpio;
 682 +               sw->flags = cfg->flags;
 683 +               sw->type = cfg->type;
 684 +               sw->debounce_rising = OMAP_GPIO_SW_DEFAULT_DEBOUNCE;
 685 +               sw->debounce_falling = OMAP_GPIO_SW_DEFAULT_DEBOUNCE;
 686 +               if ((r = new_switch(sw)) < 0) {
 687 +                       kfree(sw);
 688 +                       return r;
 689 +               }
 690 +       }
 691 +       return 0;
 692 +}
 693 +
 694 +static struct gpio_switch * __init find_switch(int gpio, const char *name)
 695 +{
 696 +       struct gpio_switch *sw;
 697 +
 698 +       list_for_each_entry(sw, &gpio_switches, node) {
 699 +               if ((gpio < 0 || sw->gpio != gpio) &&
 700 +                   (name == NULL || strcmp(sw->name, name) != 0))
 701 +                       continue;
 702 +
 703 +               if (gpio < 0 || name == NULL)
 704 +                       goto no_check;
 705 +
 706 +               if (strcmp(sw->name, name) != 0)
 707 +                       printk("gpio-switch: name mismatch for %d (%s, %s)\n",
 708 +                              gpio, name, sw->name);
 709 +               else if (sw->gpio != gpio)
 710 +                       printk("gpio-switch: GPIO mismatch for %s (%d, %d)\n",
 711 +                              name, gpio, sw->gpio);
 712 +no_check:
 713 +               return sw;
 714 +       }
 715 +       return NULL;
 716 +}
 717 +
 718 +static int __init add_board_switches(void)
 719 +{
 720 +       int i;
 721 +
 722 +       for (i = 0; i < board_gpio_sw_count; i++) {
 723 +               const struct omap_gpio_switch *cfg;
 724 +               struct gpio_switch *sw;
 725 +               int r;
 726 +
 727 +               cfg = board_gpio_sw_table + i;
 728 +               if (strlen(cfg->name) > sizeof(sw->name) - 1)
 729 +                       return -EINVAL;
 730 +               /* Check whether we only update an existing switch
 731 +                * or add a new switch. */
 732 +               sw = find_switch(cfg->gpio, cfg->name);
 733 +               if (sw != NULL) {
 734 +                       sw->debounce_rising = cfg->debounce_rising;
 735 +                       sw->debounce_falling = cfg->debounce_falling;
 736 +                       sw->notify = cfg->notify;
 737 +                       sw->notify_data = cfg->notify_data;
 738 +                       continue;
 739 +               } else {
 740 +                       if (cfg->gpio < 0 || cfg->name == NULL) {
 741 +                               printk("gpio-switch: required switch not "
 742 +                                      "found (%d, %s)\n", cfg->gpio,
 743 +                                      cfg->name);
 744 +                               continue;
 745 +                       }
 746 +               }
 747 +               sw = kzalloc(sizeof(*sw), GFP_KERNEL);
 748 +               if (sw == NULL) {
 749 +                       printk(KERN_ERR "gpio-switch: kmalloc failed\n");
 750 +                       return -ENOMEM;
 751 +               }
 752 +               strlcpy(sw->name, cfg->name, sizeof(sw->name));
 753 +               sw->gpio = cfg->gpio;
 754 +               sw->flags = cfg->flags;
 755 +               sw->type = cfg->type;
 756 +               sw->debounce_rising = cfg->debounce_rising;
 757 +               sw->debounce_falling = cfg->debounce_falling;
 758 +               sw->notify = cfg->notify;
 759 +               sw->notify_data = cfg->notify_data;
 760 +               if ((r = new_switch(sw)) < 0) {
 761 +                       kfree(sw);
 762 +                       return r;
 763 +               }
 764 +       }
 765 +       return 0;
 766 +}
 767 +
 768 +static void gpio_sw_cleanup(void)
 769 +{
 770 +       struct gpio_switch *sw = NULL, *old = NULL;
 771 +
 772 +       list_for_each_entry(sw, &gpio_switches, node) {
 773 +               if (old != NULL)
 774 +                       kfree(old);
 775 +               flush_scheduled_work();
 776 +               del_timer_sync(&sw->timer);
 777 +
 778 +               free_irq(OMAP_GPIO_IRQ(sw->gpio), sw);
 779 +
 780 +               device_remove_file(&sw->pdev.dev, &dev_attr_state);
 781 +               device_remove_file(&sw->pdev.dev, &dev_attr_type);
 782 +               device_remove_file(&sw->pdev.dev, &dev_attr_direction);
 783 +
 784 +               platform_device_unregister(&sw->pdev);
 785 +               gpio_free(sw->gpio);
 786 +               old = sw;
 787 +       }
 788 +       kfree(old);
 789 +}
 790 +
 791 +static void __init report_initial_state(void)
 792 +{
 793 +       struct gpio_switch *sw;
 794 +
 795 +       list_for_each_entry(sw, &gpio_switches, node) {
 796 +               int state;
 797 +
 798 +               state = gpio_get_value(sw->gpio);
 799 +               if (sw->flags & OMAP_GPIO_SWITCH_FLAG_INVERTED)
 800 +                       state = !state;
 801 +               if (sw->notify != NULL)
 802 +                       sw->notify(sw->notify_data, state);
 803 +               print_sw_state(sw, state);
 804 +       }
 805 +}
 806 +
 807 +static int gpio_sw_remove(struct platform_device *dev)
 808 +{
 809 +       return 0;
 810 +}
 811 +
 812 +static struct platform_driver gpio_sw_driver = {
 813 +       .remove         = gpio_sw_remove,
 814 +       .driver         = {
 815 +               .name   = "gpio-switch",
 816 +       },
 817 +};
 818 +
 819 +void __init omap_register_gpio_switches(const struct omap_gpio_switch *tbl,
 820 +                                       int count)
 821 +{
 822 +       BUG_ON(board_gpio_sw_table != NULL);
 823 +
 824 +       board_gpio_sw_table = tbl;
 825 +       board_gpio_sw_count = count;
 826 +}
 827 +
 828 +static int __init gpio_sw_init(void)
 829 +{
 830 +       int r;
 831 +
 832 +       printk(KERN_INFO "OMAP GPIO switch handler initializing\n");
 833 +
 834 +       r = platform_driver_register(&gpio_sw_driver);
 835 +       if (r)
 836 +               return r;
 837 +
 838 +       gpio_sw_platform_dev = platform_device_register_simple("gpio-switch",
 839 +                                                              -1, NULL, 0);
 840 +       if (IS_ERR(gpio_sw_platform_dev)) {
 841 +               r = PTR_ERR(gpio_sw_platform_dev);
 842 +               goto err1;
 843 +       }
 844 +
 845 +       r = add_atag_switches();
 846 +       if (r < 0)
 847 +               goto err2;
 848 +
 849 +       r = add_board_switches();
 850 +       if (r < 0)
 851 +               goto err2;
 852 +
 853 +       report_initial_state();
 854 +
 855 +       return 0;
 856 +err2:
 857 +       gpio_sw_cleanup();
 858 +       platform_device_unregister(gpio_sw_platform_dev);
 859 +err1:
 860 +       platform_driver_unregister(&gpio_sw_driver);
 861 +       return r;
 862 +}
 863 +
 864 +static void __exit gpio_sw_exit(void)
 865 +{
 866 +       gpio_sw_cleanup();
 867 +       platform_device_unregister(gpio_sw_platform_dev);
 868 +       platform_driver_unregister(&gpio_sw_driver);
 869 +}
 870 +
 871 +#ifndef MODULE
 872 +late_initcall(gpio_sw_init);
 873 +#else
 874 +module_init(gpio_sw_init);
 875 +#endif
 876 +module_exit(gpio_sw_exit);
 877 +
 878 +MODULE_AUTHOR("Juha Yrjölä <juha.yrjola@nokia.com>, Paul Mundt <paul.mundt@nokia.com");
 879 +MODULE_DESCRIPTION("GPIO switch driver");
 880 +MODULE_LICENSE("GPL");
 881 --- a/arch/arm/plat-omap/include/plat/board.h
 882 +++ b/arch/arm/plat-omap/include/plat/board.h
 883 @@ -151,6 +151,14 @@ struct omap_board_config_kernel {
 884         const void *data;
 885  };
 886
 887 +struct omap_gpio_switch_config {
 888 +       char name[12];
 889 +       u16 gpio;
 890 +       int flags:4;
 891 +       int type:4;
 892 +       int key_code:24; /* Linux key code */
 893 +};
 894 +
 895  extern const void *__init __omap_get_config(u16 tag, size_t len, int nr);
 896
 897  #define omap_get_config(tag, type) \