include/linux/i2c.h

   1 /* ------------------------------------------------------------------------- */
   2 /*                                                                           */
   3 /* i2c.h - definitions for the i2c-bus interface                             */
   4 /*                                                                           */
   5 /* ------------------------------------------------------------------------- */
   6 /*   Copyright (C) 1995-2000 Simon G. Vogl
   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 as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
  21 /* ------------------------------------------------------------------------- */
  22
  23 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
  24    Frodo Looijaard <frodol@dds.nl> */
  25
  26 /* $Id: i2c.h,v 1.40 2000/07/19 19:55:45 frodo Exp $ */
  27
  28 #ifndef I2C_H
  29 #define I2C_H
  30
  31 #include <linux/i2c-id.h>       /* id values of adapters et. al.        */
  32 #include <linux/types.h>
  33
  34
  35 struct i2c_msg;
  36
  37
  38 #ifdef __KERNEL__
  39
  40 /* --- Includes and compatibility declarations ------------------------ */
  41
  42 #include <linux/version.h>
  43 #ifndef KERNEL_VERSION
  44 #define KERNEL_VERSION(a,b,c) (((a) << 16) | ((b) << 8) | (c))
  45 #endif
  46
  47 #include <asm/page.h>                   /* for 2.2.xx                   */
  48 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,0,25)
  49 #include <linux/sched.h>
  50 #else
  51 #include <asm/semaphore.h>
  52 #endif
  53 #include <linux/config.h>
  54
  55 /* --- General options ------------------------------------------------ */
  56
  57 #define I2C_ALGO_MAX    4               /* control memory consumption   */
  58 #define I2C_ADAP_MAX    16
  59 #define I2C_DRIVER_MAX  16
  60 #define I2C_CLIENT_MAX  32
  61 #define I2C_DUMMY_MAX 4
  62
  63 struct i2c_algorithm;
  64 struct i2c_adapter;
  65 struct i2c_client;
  66 struct i2c_driver;
  67 struct i2c_client_address_data;
  68 union i2c_smbus_data;
  69
  70
  71 /*
  72  * The master routines are the ones normally used to transmit data to devices
  73  * on a bus (or read from them). Apart from two basic transfer functions to
  74  * transmit one message at a time, a more complex version can be used to
  75  * transmit an arbitrary number of messages without interruption.
  76  */
  77 extern int i2c_master_send(struct i2c_client *,const char* ,int);
  78 extern int i2c_master_recv(struct i2c_client *,char* ,int);
  79
  80 /* Transfer num messages.
  81  */
  82 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],int num);
  83
  84 /*
  85  * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
  86  * This is not tested/implemented yet and will change in the future.
  87  */
  88 extern int i2c_slave_send(struct i2c_client *,char*,int);
  89 extern int i2c_slave_recv(struct i2c_client *,char*,int);
  90
  91
  92
  93 /* This is the very generalized SMBus access routine. You probably do not
  94    want to use this, though; one of the functions below may be much easier,
  95    and probably just as fast.
  96    Note that we use i2c_adapter here, because you do not need a specific
  97    smbus adapter to call this function. */
  98 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
  99                            unsigned short flags,
 100                            char read_write, u8 command, int size,
 101                            union i2c_smbus_data * data);
 102
 103 /* Now follow the 'nice' access routines. These also document the calling
 104    conventions of smbus_access. */
 105
 106 extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
 107 extern s32 i2c_smbus_read_byte(struct i2c_client * client);
 108 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
 109 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
 110 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
 111                                      u8 command, u8 value);
 112 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
 113 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
 114                                      u8 command, u16 value);
 115 extern s32 i2c_smbus_process_call(struct i2c_client * client,
 116                                   u8 command, u16 value);
 117 /* Returns the number of read bytes */
 118 extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
 119                                      u8 command, u8 *values);
 120 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
 121                                       u8 command, u8 length,
 122                                       u8 *values);
 123
 124
 125 /*
 126  * A driver is capable of handling one or more physical devices present on
 127  * I2C adapters. This information is used to inform the driver of adapter
 128  * events.
 129  */
 130
 131 struct i2c_driver {
 132         char name[32];
 133         int id;
 134         unsigned int flags;             /* div., see below              */
 135
 136         /* Notifies the driver that a new bus has appeared. This routine
 137          * can be used by the driver to test if the bus meets its conditions
 138          * & seek for the presence of the chip(s) it supports. If found, it
 139          * registers the client(s) that are on the bus to the i2c admin. via
 140          * i2c_attach_client.
 141          */
 142         int (*attach_adapter)(struct i2c_adapter *);
 143
 144         /* tells the driver that a client is about to be deleted & gives it
 145          * the chance to remove its private data. Also, if the client struct
 146          * has been dynamically allocated by the driver in the function above,
 147          * it must be freed here.
 148          */
 149         int (*detach_client)(struct i2c_client *);
 150
 151         /* a ioctl like command that can be used to perform specific functions
 152          * with the device.
 153          */
 154         int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
 155
 156         /* These two are mainly used for bookkeeping & dynamic unloading of
 157          * kernel modules. inc_use tells the driver that a client is being
 158          * used by another module & that it should increase its ref. counter.
 159          * dec_use is the inverse operation.
 160          * NB: Make sure you have no circular dependencies, or else you get a
 161          * deadlock when trying to unload the modules.
 162         * You should use the i2c_{inc,dec}_use_client functions instead of
 163         * calling this function directly.
 164          */
 165         void (*inc_use)(struct i2c_client *client);
 166         void (*dec_use)(struct i2c_client *client);
 167 };
 168
 169 /*
 170  * i2c_client identifies a single device (i.e. chip) that is connected to an
 171  * i2c bus. The behaviour is defined by the routines of the driver. This
 172  * function is mainly used for lookup & other admin. functions.
 173  */
 174 struct i2c_client {
 175         char name[32];
 176         int id;
 177         unsigned int flags;             /* div., see below              */
 178         unsigned int addr;              /* chip address - NOTE: 7bit    */
 179                                         /* addresses are stored in the  */
 180                                         /* _LOWER_ 7 bits of this char  */
 181         /* addr: unsigned int to make lm_sensors i2c-isa adapter work
 182           more cleanly. It does not take any more memory space, due to
 183           alignment considerations */
 184         struct i2c_adapter *adapter;    /* the adapter we sit on        */
 185         struct i2c_driver *driver;      /* and our access routines      */
 186         void *data;                     /* for the clients              */
 187         int usage_count;                /* How many accesses currently  */
 188                                         /* to the client                */
 189 };
 190
 191
 192 /*
 193  * The following structs are for those who like to implement new bus drivers:
 194  * i2c_algorithm is the interface to a class of hardware solutions which can
 195  * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
 196  * to name two of the most common.
 197  */
 198 struct i2c_algorithm {
 199         char name[32];                          /* textual description  */
 200         unsigned int id;
 201
 202         /* If a adapter algorithm can't to I2C-level access, set master_xfer
 203            to NULL. If an adapter algorithm can do SMBus access, set
 204            smbus_xfer. If set to NULL, the SMBus protocol is simulated
 205            using common I2C messages */
 206         int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg msgs[],
 207                            int num);
 208         int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
 209                            unsigned short flags, char read_write,
 210                            u8 command, int size, union i2c_smbus_data * data);
 211
 212         /* --- these optional/future use for some adapter types.*/
 213         int (*slave_send)(struct i2c_adapter *,char*,int);
 214         int (*slave_recv)(struct i2c_adapter *,char*,int);
 215
 216         /* --- ioctl like call to set div. parameters. */
 217         int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
 218
 219         /* To determine what the adapter supports */
 220         u32 (*functionality) (struct i2c_adapter *);
 221 };
 222
 223 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,29)
 224 struct proc_dir_entry;
 225 #endif
 226
 227 /*
 228  * i2c_adapter is the structure used to identify a physical i2c bus along
 229  * with the access algorithms necessary to access it.
 230  */
 231 struct i2c_adapter {
 232         char name[32];  /* some useful name to identify the adapter     */
 233         unsigned int id;/* == is algo->id | hwdep.struct->id,           */
 234                         /* for registered values see below              */
 235         struct i2c_algorithm *algo;/* the algorithm to access the bus   */
 236         void *algo_data;
 237
 238         /* --- These may be NULL, but should increase the module use count */
 239         void (*inc_use)(struct i2c_adapter *);
 240         void (*dec_use)(struct i2c_adapter *);
 241
 242         /* --- administration stuff. */
 243         int (*client_register)(struct i2c_client *);
 244         int (*client_unregister)(struct i2c_client *);
 245
 246         void *data;     /* private data for the adapter                 */
 247                         /* some data fields that are used by all types  */
 248                         /* these data fields are readonly to the public */
 249                         /* and can be set via the i2c_ioctl call        */
 250
 251                         /* data fields that are valid for all devices   */
 252         struct semaphore lock;
 253         unsigned int flags;/* flags specifying div. data                */
 254
 255         struct i2c_client *clients[I2C_CLIENT_MAX];
 256         int client_count;
 257
 258         int timeout;
 259         int retries;
 260
 261 #ifdef CONFIG_PROC_FS
 262         /* No need to set this when you initialize the adapter          */
 263         int inode;
 264 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,29)
 265         struct proc_dir_entry *proc_entry;
 266 #endif
 267 #endif /* def CONFIG_PROC_FS */
 268 };
 269
 270 /*flags for the driver struct: */
 271 #define I2C_DF_NOTIFY   0x01            /* notify on bus (de/a)ttaches  */
 272 #define I2C_DF_DUMMY    0x02            /* do not connect any clients */
 273
 274 /*flags for the client struct: */
 275 #define I2C_CLIENT_ALLOW_USE            0x01    /* Client allows access */
 276 #define I2C_CLIENT_ALLOW_MULTIPLE_USE   0x02    /* Allow multiple access-locks */
 277                                                 /* on an i2c_client */
 278
 279 /* i2c_client_address_data is the struct for holding default client
 280  * addresses for a driver and for the parameters supplied on the
 281  * command line
 282  */
 283 struct i2c_client_address_data {
 284         unsigned short *normal_i2c;
 285         unsigned short *normal_i2c_range;
 286         unsigned short *probe;
 287         unsigned short *probe_range;
 288         unsigned short *ignore;
 289         unsigned short *ignore_range;
 290         unsigned short *force;
 291 };
 292
 293 /* Internal numbers to terminate lists */
 294 #define I2C_CLIENT_END 0xfffe
 295
 296 /* The numbers to use to set I2C bus address */
 297 #define ANY_I2C_BUS 0xffff
 298
 299 /* The length of the option lists */
 300 #define I2C_CLIENT_MAX_OPTS 48
 301
 302
 303 /* ----- functions exported by i2c.o */
 304
 305 /* administration...
 306  */
 307 extern int i2c_add_adapter(struct i2c_adapter *);
 308 extern int i2c_del_adapter(struct i2c_adapter *);
 309
 310 extern int i2c_add_driver(struct i2c_driver *);
 311 extern int i2c_del_driver(struct i2c_driver *);
 312
 313 extern int i2c_attach_client(struct i2c_client *);
 314 extern int i2c_detach_client(struct i2c_client *);
 315
 316 /* Only call these if you grab a resource that makes unloading the
 317    client and the adapter it is on completely impossible. Like when a
 318    /proc directory is entered. */
 319 extern void i2c_inc_use_client(struct i2c_client *);
 320 extern void i2c_dec_use_client(struct i2c_client *);
 321
 322 /* New function: This is to get an i2c_client-struct for controlling the
 323    client either by using i2c_control-function or having the
 324    client-module export functions that can be used with the i2c_client
 325    -struct. */
 326 extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
 327                                         struct i2c_client *prev);
 328
 329 /* Should be used with new function
 330    extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
 331    to make sure that client-struct is valid and that it is okay to access
 332    the i2c-client.
 333    returns -EACCES if client doesn't allow use (default)
 334    returns -EBUSY if client doesn't allow multiple use (default) and
 335    usage_count >0 */
 336 extern int i2c_use_client(struct i2c_client *);
 337 extern int i2c_release_client(struct i2c_client *);
 338
 339 /* returns -EBUSY if address has been taken, 0 if not. Note that the only
 340    other place at which this is called is within i2c_attach_client; so
 341    you can cheat by simply not registering. Not recommended, of course! */
 342 extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
 343
 344 /* Detect function. It itterates over all possible addresses itself.
 345  * It will only call found_proc if some client is connected at the
 346  * specific address (unless a 'force' matched);
 347  */
 348 typedef int i2c_client_found_addr_proc (struct i2c_adapter *adapter,
 349                                      int addr, unsigned short flags,int kind);
 350
 351 extern int i2c_probe(struct i2c_adapter *adapter,
 352                 struct i2c_client_address_data *address_data,
 353                 i2c_client_found_addr_proc *found_proc);
 354
 355 /* An ioctl like call to set div. parameters of the adapter.
 356  */
 357 extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
 358
 359 /* This call returns a unique low identifier for each registered adapter,
 360  * or -1 if the adapter was not regisitered.
 361  */
 362 extern int i2c_adapter_id(struct i2c_adapter *adap);
 363
 364
 365
 366 /* Return the functionality mask */
 367 extern u32 i2c_get_functionality (struct i2c_adapter *adap);
 368
 369 /* Return 1 if adapter supports everything we need, 0 if not. */
 370 extern int i2c_check_functionality (struct i2c_adapter *adap, u32 func);
 371
 372 #endif /* __KERNEL__ */
 373
 374 /*
 375  * I2C Message - used for pure i2c transaction, also from /dev interface
 376  */
 377 struct i2c_msg {
 378         __u16 addr;     /* slave address                        */
 379         unsigned short flags;
 380 #define I2C_M_TEN       0x10    /* we have a ten bit chip address       */
 381 #define I2C_M_RD        0x01
 382 #define I2C_M_NOSTART   0x4000
 383 #define I2C_M_REV_DIR_ADDR      0x2000
 384         short len;              /* msg length                           */
 385         char *buf;              /* pointer to msg data                  */
 386 };
 387
 388 /* To determine what functionality is present */
 389
 390 #define I2C_FUNC_I2C                    0x00000001
 391 #define I2C_FUNC_10BIT_ADDR             0x00000002
 392 #define I2C_FUNC_PROTOCOL_MANGLING      0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART} */
 393 #define I2C_FUNC_SMBUS_QUICK            0x00010000
 394 #define I2C_FUNC_SMBUS_READ_BYTE        0x00020000
 395 #define I2C_FUNC_SMBUS_WRITE_BYTE       0x00040000
 396 #define I2C_FUNC_SMBUS_READ_BYTE_DATA   0x00080000
 397 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA  0x00100000
 398 #define I2C_FUNC_SMBUS_READ_WORD_DATA   0x00200000
 399 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA  0x00400000
 400 #define I2C_FUNC_SMBUS_PROC_CALL        0x00800000
 401 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA  0x01000000
 402 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
 403 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK   0x04000000 /* New I2C-like block */
 404 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK  0x08000000 /* transfer */
 405
 406 #define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
 407                             I2C_FUNC_SMBUS_WRITE_BYTE
 408 #define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
 409                                  I2C_FUNC_SMBUS_WRITE_BYTE_DATA
 410 #define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
 411                                  I2C_FUNC_SMBUS_WRITE_WORD_DATA
 412 #define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
 413                                   I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
 414 #define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
 415                                   I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
 416
 417 #define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
 418                             I2C_FUNC_SMBUS_BYTE | \
 419                             I2C_FUNC_SMBUS_BYTE_DATA | \
 420                             I2C_FUNC_SMBUS_WORD_DATA | \
 421                             I2C_FUNC_SMBUS_PROC_CALL | \
 422                             I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
 423
 424 /*
 425  * Data for SMBus Messages
 426  */
 427 union i2c_smbus_data {
 428         __u8 byte;
 429         __u16 word;
 430         __u8 block[33]; /* block[0] is used for length */
 431 };
 432
 433 /* smbus_access read or write markers */
 434 #define I2C_SMBUS_READ  1
 435 #define I2C_SMBUS_WRITE 0
 436
 437 /* SMBus transaction types (size parameter in the above functions)
 438    Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
 439 #define I2C_SMBUS_QUICK         0
 440 #define I2C_SMBUS_BYTE          1
 441 #define I2C_SMBUS_BYTE_DATA     2
 442 #define I2C_SMBUS_WORD_DATA     3
 443 #define I2C_SMBUS_PROC_CALL     4
 444 #define I2C_SMBUS_BLOCK_DATA    5
 445
 446
 447 /* ----- commands for the ioctl like i2c_command call:
 448  * note that additional calls are defined in the algorithm and hw
 449  *      dependent layers - these can be listed here, or see the
 450  *      corresponding header files.
 451  */
 452                                 /* -> bit-adapter specific ioctls       */
 453 #define I2C_RETRIES     0x0701  /* number times a device adress should  */
 454                                 /* be polled when not acknowledging     */
 455 #define I2C_TIMEOUT     0x0702  /* set timeout - call with int          */
 456
 457
 458 /* this is for i2c-dev.c        */
 459 #define I2C_SLAVE       0x0703  /* Change slave address                 */
 460                                 /* Attn.: Slave address is 7 or 10 bits */
 461 #define I2C_SLAVE_FORCE 0x0706  /* Change slave address                 */
 462                                 /* Attn.: Slave address is 7 or 10 bits */
 463                                 /* This changes the address, even if it */
 464                                 /* is already taken!                    */
 465 #define I2C_TENBIT      0x0704  /* 0 for 7 bit addrs, != 0 for 10 bit   */
 466
 467 #define I2C_FUNCS       0x0705  /* Get the adapter functionality */
 468 #define I2C_RDWR        0x0707  /* Combined R/W transfer (one stop only)*/
 469 #if 0
 470 #define I2C_ACK_TEST    0x0710  /* See if a slave is at a specific adress */
 471 #endif
 472
 473 #define I2C_SMBUS       0x0720  /* SMBus-level access */
 474
 475 /* ... algo-bit.c recognizes */
 476 #define I2C_UDELAY      0x0705  /* set delay in microsecs between each  */
 477                                 /* written byte (except address)        */
 478 #define I2C_MDELAY      0x0706  /* millisec delay between written bytes */
 479
 480 /* ----- I2C-DEV: char device interface stuff ------------------------- */
 481
 482 #define I2C_MAJOR       89              /* Device major number          */
 483
 484 #ifdef __KERNEL__
 485
 486 #  ifndef NULL
 487 #    define NULL ( (void *) 0 )
 488 #  endif
 489
 490 #  ifndef ENODEV
 491 #    include <asm/errno.h>
 492 #  endif
 493
 494 /* These defines are used for probing i2c client addresses */
 495 /* Default fill of many variables */
 496 #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 497                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 498                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 499                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 500                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 501                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 502                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 503                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 504                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 505                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 506                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 507                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 508                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 509                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 510                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 511                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
 512
 513 /* This is ugly. We need to evaluate I2C_CLIENT_MAX_OPTS before it is
 514    stringified */
 515 #define I2C_CLIENT_MODPARM_AUX1(x) "1-" #x "h"
 516 #define I2C_CLIENT_MODPARM_AUX(x) I2C_CLIENT_MODPARM_AUX1(x)
 517 #define I2C_CLIENT_MODPARM I2C_CLIENT_MODPARM_AUX(I2C_CLIENT_MAX_OPTS)
 518
 519 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
 520    module header */
 521
 522 #define I2C_CLIENT_MODULE_PARM(var,desc) \
 523   static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
 524   MODULE_PARM(var,I2C_CLIENT_MODPARM); \
 525   MODULE_PARM_DESC(var,desc)
 526
 527 /* This is the one you want to use in your own modules */
 528 #define I2C_CLIENT_INSMOD \
 529   I2C_CLIENT_MODULE_PARM(probe, \
 530                       "List of adapter,address pairs to scan additionally"); \
 531   I2C_CLIENT_MODULE_PARM(probe_range, \
 532                       "List of adapter,start-addr,end-addr triples to scan " \
 533                       "additionally"); \
 534   I2C_CLIENT_MODULE_PARM(ignore, \
 535                       "List of adapter,address pairs not to scan"); \
 536   I2C_CLIENT_MODULE_PARM(ignore_range, \
 537                       "List of adapter,start-addr,end-addr triples not to " \
 538                       "scan"); \
 539   I2C_CLIENT_MODULE_PARM(force, \
 540                       "List of adapter,address pairs to boldly assume " \
 541                       "to be present"); \
 542   static struct i2c_client_address_data addr_data = \
 543                                        {normal_i2c, normal_i2c_range, \
 544                                         probe, probe_range, \
 545                                         ignore, ignore_range, \
 546                                         force}
 547
 548 #endif /* def __KERNEL__ */
 549 #endif /* I2C_H */