drivers/i2c/tegra_i2c.c

   1 /*
   2  * Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
   3  * Copyright (c) 2010-2011 NVIDIA Corporation
   4  *  NVIDIA Corporation <www.nvidia.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <fdtdec.h>
  11 #include <i2c.h>
  12 #include <asm/io.h>
  13 #include <asm/arch/clock.h>
  14 #include <asm/arch/funcmux.h>
  15 #include <asm/arch/gpio.h>
  16 #include <asm/arch/pinmux.h>
  17 #include <asm/arch-tegra/clk_rst.h>
  18 #include <asm/arch-tegra/tegra_i2c.h>
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 /* Information about i2c controller */
  23 struct i2c_bus {
  24         int                     id;
  25         enum periph_id          periph_id;
  26         int                     speed;
  27         int                     pinmux_config;
  28         struct i2c_control      *control;
  29         struct i2c_ctlr         *regs;
  30         int                     is_dvc; /* DVC type, rather than I2C */
  31         int                     is_scs; /* single clock source (T114+) */
  32         int                     inited; /* bus is inited */
  33 };
  34
  35 static struct i2c_bus i2c_controllers[TEGRA_I2C_NUM_CONTROLLERS];
  36
  37 static void set_packet_mode(struct i2c_bus *i2c_bus)
  38 {
  39         u32 config;
  40
  41         config = I2C_CNFG_NEW_MASTER_FSM_MASK | I2C_CNFG_PACKET_MODE_MASK;
  42
  43         if (i2c_bus->is_dvc) {
  44                 struct dvc_ctlr *dvc = (struct dvc_ctlr *)i2c_bus->regs;
  45
  46                 writel(config, &dvc->cnfg);
  47         } else {
  48                 writel(config, &i2c_bus->regs->cnfg);
  49                 /*
  50                  * program I2C_SL_CNFG.NEWSL to ENABLE. This fixes probe
  51                  * issues, i.e., some slaves may be wrongly detected.
  52                  */
  53                 setbits_le32(&i2c_bus->regs->sl_cnfg, I2C_SL_CNFG_NEWSL_MASK);
  54         }
  55 }
  56
  57 static void i2c_reset_controller(struct i2c_bus *i2c_bus)
  58 {
  59         /* Reset I2C controller. */
  60         reset_periph(i2c_bus->periph_id, 1);
  61
  62         /* re-program config register to packet mode */
  63         set_packet_mode(i2c_bus);
  64 }
  65
  66 static void i2c_init_controller(struct i2c_bus *i2c_bus)
  67 {
  68         /*
  69          * Use PLLP - DP-04508-001_v06 datasheet indicates a divisor of 8
  70          * here, in section 23.3.1, but in fact we seem to need a factor of
  71          * 16 to get the right frequency.
  72          */
  73         clock_start_periph_pll(i2c_bus->periph_id, CLOCK_ID_PERIPH,
  74                 i2c_bus->speed * 2 * 8);
  75
  76         if (i2c_bus->is_scs) {
  77                 /*
  78                  * T114 I2C went to a single clock source for standard/fast and
  79                  * HS clock speeds. The new clock rate setting calculation is:
  80                  *  SCL = CLK_SOURCE.I2C /
  81                  *   (CLK_MULT_STD_FAST_MODE * (I2C_CLK_DIV_STD_FAST_MODE+1) *
  82                  *   I2C FREQUENCY DIVISOR) as per the T114 TRM (sec 30.3.1).
  83                  *
  84                  * NOTE: We do this here, after the initial clock/pll start,
  85                  * because if we read the clk_div reg before the controller
  86                  * is running, we hang, and we need it for the new calc.
  87                  */
  88                 int clk_div_stdfst_mode = readl(&i2c_bus->regs->clk_div) >> 16;
  89                 debug("%s: CLK_DIV_STD_FAST_MODE setting = %d\n", __func__,
  90                         clk_div_stdfst_mode);
  91
  92                 clock_start_periph_pll(i2c_bus->periph_id, CLOCK_ID_PERIPH,
  93                         CLK_MULT_STD_FAST_MODE * (clk_div_stdfst_mode + 1) *
  94                         i2c_bus->speed * 2);
  95         }
  96
  97         /* Reset I2C controller. */
  98         i2c_reset_controller(i2c_bus);
  99
 100         /* Configure I2C controller. */
 101         if (i2c_bus->is_dvc) {  /* only for DVC I2C */
 102                 struct dvc_ctlr *dvc = (struct dvc_ctlr *)i2c_bus->regs;
 103
 104                 setbits_le32(&dvc->ctrl3, DVC_CTRL_REG3_I2C_HW_SW_PROG_MASK);
 105         }
 106
 107         funcmux_select(i2c_bus->periph_id, i2c_bus->pinmux_config);
 108 }
 109
 110 static void send_packet_headers(
 111         struct i2c_bus *i2c_bus,
 112         struct i2c_trans_info *trans,
 113         u32 packet_id,
 114         bool end_with_repeated_start)
 115 {
 116         u32 data;
 117
 118         /* prepare header1: Header size = 0 Protocol = I2C, pktType = 0 */
 119         data = PROTOCOL_TYPE_I2C << PKT_HDR1_PROTOCOL_SHIFT;
 120         data |= packet_id << PKT_HDR1_PKT_ID_SHIFT;
 121         data |= i2c_bus->id << PKT_HDR1_CTLR_ID_SHIFT;
 122         writel(data, &i2c_bus->control->tx_fifo);
 123         debug("pkt header 1 sent (0x%x)\n", data);
 124
 125         /* prepare header2 */
 126         data = (trans->num_bytes - 1) << PKT_HDR2_PAYLOAD_SIZE_SHIFT;
 127         writel(data, &i2c_bus->control->tx_fifo);
 128         debug("pkt header 2 sent (0x%x)\n", data);
 129
 130         /* prepare IO specific header: configure the slave address */
 131         data = trans->address << PKT_HDR3_SLAVE_ADDR_SHIFT;
 132
 133         /* Enable Read if it is not a write transaction */
 134         if (!(trans->flags & I2C_IS_WRITE))
 135                 data |= PKT_HDR3_READ_MODE_MASK;
 136         if (end_with_repeated_start)
 137                 data |= PKT_HDR3_REPEAT_START_MASK;
 138
 139         /* Write I2C specific header */
 140         writel(data, &i2c_bus->control->tx_fifo);
 141         debug("pkt header 3 sent (0x%x)\n", data);
 142 }
 143
 144 static int wait_for_tx_fifo_empty(struct i2c_control *control)
 145 {
 146         u32 count;
 147         int timeout_us = I2C_TIMEOUT_USEC;
 148
 149         while (timeout_us >= 0) {
 150                 count = (readl(&control->fifo_status) & TX_FIFO_EMPTY_CNT_MASK)
 151                                 >> TX_FIFO_EMPTY_CNT_SHIFT;
 152                 if (count == I2C_FIFO_DEPTH)
 153                         return 1;
 154                 udelay(10);
 155                 timeout_us -= 10;
 156         }
 157
 158         return 0;
 159 }
 160
 161 static int wait_for_rx_fifo_notempty(struct i2c_control *control)
 162 {
 163         u32 count;
 164         int timeout_us = I2C_TIMEOUT_USEC;
 165
 166         while (timeout_us >= 0) {
 167                 count = (readl(&control->fifo_status) & TX_FIFO_FULL_CNT_MASK)
 168                                 >> TX_FIFO_FULL_CNT_SHIFT;
 169                 if (count)
 170                         return 1;
 171                 udelay(10);
 172                 timeout_us -= 10;
 173         }
 174
 175         return 0;
 176 }
 177
 178 static int wait_for_transfer_complete(struct i2c_control *control)
 179 {
 180         int int_status;
 181         int timeout_us = I2C_TIMEOUT_USEC;
 182
 183         while (timeout_us >= 0) {
 184                 int_status = readl(&control->int_status);
 185                 if (int_status & I2C_INT_NO_ACK_MASK)
 186                         return -int_status;
 187                 if (int_status & I2C_INT_ARBITRATION_LOST_MASK)
 188                         return -int_status;
 189                 if (int_status & I2C_INT_XFER_COMPLETE_MASK)
 190                         return 0;
 191
 192                 udelay(10);
 193                 timeout_us -= 10;
 194         }
 195
 196         return -1;
 197 }
 198
 199 static int send_recv_packets(struct i2c_bus *i2c_bus,
 200                              struct i2c_trans_info *trans)
 201 {
 202         struct i2c_control *control = i2c_bus->control;
 203         u32 int_status;
 204         u32 words;
 205         u8 *dptr;
 206         u32 local;
 207         uchar last_bytes;
 208         int error = 0;
 209         int is_write = trans->flags & I2C_IS_WRITE;
 210
 211         /* clear status from previous transaction, XFER_COMPLETE, NOACK, etc. */
 212         int_status = readl(&control->int_status);
 213         writel(int_status, &control->int_status);
 214
 215         send_packet_headers(i2c_bus, trans, 1,
 216                             trans->flags & I2C_USE_REPEATED_START);
 217
 218         words = DIV_ROUND_UP(trans->num_bytes, 4);
 219         last_bytes = trans->num_bytes & 3;
 220         dptr = trans->buf;
 221
 222         while (words) {
 223                 u32 *wptr = (u32 *)dptr;
 224
 225                 if (is_write) {
 226                         /* deal with word alignment */
 227                         if ((words == 1) && last_bytes) {
 228                                 local = 0;
 229                                 memcpy(&local, dptr, last_bytes);
 230                         } else if ((unsigned)dptr & 3) {
 231                                 memcpy(&local, dptr, sizeof(u32));
 232                         } else {
 233                                 local = *wptr;
 234                         }
 235                         writel(local, &control->tx_fifo);
 236                         debug("pkt data sent (0x%x)\n", local);
 237                         if (!wait_for_tx_fifo_empty(control)) {
 238                                 error = -1;
 239                                 goto exit;
 240                         }
 241                 } else {
 242                         if (!wait_for_rx_fifo_notempty(control)) {
 243                                 error = -1;
 244                                 goto exit;
 245                         }
 246                         /*
 247                          * for the last word, we read into our local buffer,
 248                          * in case that caller did not provide enough buffer.
 249                          */
 250                         local = readl(&control->rx_fifo);
 251                         if ((words == 1) && last_bytes)
 252                                 memcpy(dptr, (char *)&local, last_bytes);
 253                         else if ((unsigned)dptr & 3)
 254                                 memcpy(dptr, &local, sizeof(u32));
 255                         else
 256                                 *wptr = local;
 257                         debug("pkt data received (0x%x)\n", local);
 258                 }
 259                 words--;
 260                 dptr += sizeof(u32);
 261         }
 262
 263         if (wait_for_transfer_complete(control)) {
 264                 error = -1;
 265                 goto exit;
 266         }
 267         return 0;
 268 exit:
 269         /* error, reset the controller. */
 270         i2c_reset_controller(i2c_bus);
 271
 272         return error;
 273 }
 274
 275 static int tegra_i2c_write_data(struct i2c_bus *bus, u32 addr, u8 *data,
 276                                 u32 len, bool end_with_repeated_start)
 277 {
 278         int error;
 279         struct i2c_trans_info trans_info;
 280
 281         trans_info.address = addr;
 282         trans_info.buf = data;
 283         trans_info.flags = I2C_IS_WRITE;
 284         if (end_with_repeated_start)
 285                 trans_info.flags |= I2C_USE_REPEATED_START;
 286         trans_info.num_bytes = len;
 287         trans_info.is_10bit_address = 0;
 288
 289         error = send_recv_packets(bus, &trans_info);
 290         if (error)
 291                 debug("tegra_i2c_write_data: Error (%d) !!!\n", error);
 292
 293         return error;
 294 }
 295
 296 static int tegra_i2c_read_data(struct i2c_bus *bus, u32 addr, u8 *data,
 297                                u32 len)
 298 {
 299         int error;
 300         struct i2c_trans_info trans_info;
 301
 302         trans_info.address = addr | 1;
 303         trans_info.buf = data;
 304         trans_info.flags = 0;
 305         trans_info.num_bytes = len;
 306         trans_info.is_10bit_address = 0;
 307
 308         error = send_recv_packets(bus, &trans_info);
 309         if (error)
 310                 debug("tegra_i2c_read_data: Error (%d) !!!\n", error);
 311
 312         return error;
 313 }
 314
 315 #ifndef CONFIG_OF_CONTROL
 316 #error "Please enable device tree support to use this driver"
 317 #endif
 318
 319 /**
 320  * Check that a bus number is valid and return a pointer to it
 321  *
 322  * @param bus_num       Bus number to check / return
 323  * @return pointer to bus, if valid, else NULL
 324  */
 325 static struct i2c_bus *tegra_i2c_get_bus(struct i2c_adapter *adap)
 326 {
 327         struct i2c_bus *bus;
 328
 329         bus = &i2c_controllers[adap->hwadapnr];
 330         if (!bus->inited) {
 331                 debug("%s: Bus %u not available\n", __func__, adap->hwadapnr);
 332                 return NULL;
 333         }
 334
 335         return bus;
 336 }
 337
 338 static unsigned int tegra_i2c_set_bus_speed(struct i2c_adapter *adap,
 339                         unsigned int speed)
 340 {
 341         struct i2c_bus *bus;
 342
 343         bus = tegra_i2c_get_bus(adap);
 344         if (!bus)
 345                 return 0;
 346         bus->speed = speed;
 347         i2c_init_controller(bus);
 348
 349         return 0;
 350 }
 351
 352 static int i2c_get_config(const void *blob, int node, struct i2c_bus *i2c_bus)
 353 {
 354         i2c_bus->regs = (struct i2c_ctlr *)fdtdec_get_addr(blob, node, "reg");
 355
 356         /*
 357          * We don't have a binding for pinmux yet. Leave it out for now. So
 358          * far no one needs anything other than the default.
 359          */
 360         i2c_bus->pinmux_config = FUNCMUX_DEFAULT;
 361         i2c_bus->speed = fdtdec_get_int(blob, node, "clock-frequency", 0);
 362         i2c_bus->periph_id = clock_decode_periph_id(blob, node);
 363
 364         /*
 365          * We can't specify the pinmux config in the fdt, so I2C2 will not
 366          * work on Seaboard. It normally has no devices on it anyway.
 367          * You could add in this little hack if you need to use it.
 368          * The correct solution is a pinmux binding in the fdt.
 369          *
 370          *      if (i2c_bus->periph_id == PERIPH_ID_I2C2)
 371          *              i2c_bus->pinmux_config = FUNCMUX_I2C2_PTA;
 372          */
 373         if (i2c_bus->periph_id == -1)
 374                 return -FDT_ERR_NOTFOUND;
 375
 376         return 0;
 377 }
 378
 379 /*
 380  * Process a list of nodes, adding them to our list of I2C ports.
 381  *
 382  * @param blob          fdt blob
 383  * @param node_list     list of nodes to process (any <=0 are ignored)
 384  * @param count         number of nodes to process
 385  * @param is_dvc        1 if these are DVC ports, 0 if standard I2C
 386  * @param is_scs        1 if this HW uses a single clock source (T114+)
 387  * @return 0 if ok, -1 on error
 388  */
 389 static int process_nodes(const void *blob, int node_list[], int count,
 390                          int is_dvc, int is_scs)
 391 {
 392         struct i2c_bus *i2c_bus;
 393         int i;
 394
 395         /* build the i2c_controllers[] for each controller */
 396         for (i = 0; i < count; i++) {
 397                 int node = node_list[i];
 398
 399                 if (node <= 0)
 400                         continue;
 401
 402                 i2c_bus = &i2c_controllers[i];
 403                 i2c_bus->id = i;
 404
 405                 if (i2c_get_config(blob, node, i2c_bus)) {
 406                         printf("i2c_init_board: failed to decode bus %d\n", i);
 407                         return -1;
 408                 }
 409
 410                 i2c_bus->is_scs = is_scs;
 411
 412                 i2c_bus->is_dvc = is_dvc;
 413                 if (is_dvc) {
 414                         i2c_bus->control =
 415                                 &((struct dvc_ctlr *)i2c_bus->regs)->control;
 416                 } else {
 417                         i2c_bus->control = &i2c_bus->regs->control;
 418                 }
 419                 debug("%s: controller bus %d at %p, periph_id %d, speed %d: ",
 420                       is_dvc ? "dvc" : "i2c", i, i2c_bus->regs,
 421                       i2c_bus->periph_id, i2c_bus->speed);
 422                 i2c_init_controller(i2c_bus);
 423                 debug("ok\n");
 424                 i2c_bus->inited = 1;
 425
 426                 /* Mark position as used */
 427                 node_list[i] = -1;
 428         }
 429
 430         return 0;
 431 }
 432
 433 /* Sadly there is no error return from this function */
 434 void i2c_init_board(void)
 435 {
 436         int node_list[TEGRA_I2C_NUM_CONTROLLERS];
 437         const void *blob = gd->fdt_blob;
 438         int count;
 439
 440         /* First check for newer (T114+) I2C ports */
 441         count = fdtdec_find_aliases_for_id(blob, "i2c",
 442                         COMPAT_NVIDIA_TEGRA114_I2C, node_list,
 443                         TEGRA_I2C_NUM_CONTROLLERS);
 444         if (process_nodes(blob, node_list, count, 0, 1))
 445                 return;
 446
 447         /* Now get the older (T20/T30) normal I2C ports */
 448         count = fdtdec_find_aliases_for_id(blob, "i2c",
 449                         COMPAT_NVIDIA_TEGRA20_I2C, node_list,
 450                         TEGRA_I2C_NUM_CONTROLLERS);
 451         if (process_nodes(blob, node_list, count, 0, 0))
 452                 return;
 453
 454         /* Now look for dvc ports */
 455         count = fdtdec_add_aliases_for_id(blob, "i2c",
 456                         COMPAT_NVIDIA_TEGRA20_DVC, node_list,
 457                         TEGRA_I2C_NUM_CONTROLLERS);
 458         if (process_nodes(blob, node_list, count, 1, 0))
 459                 return;
 460 }
 461
 462 static void tegra_i2c_init(struct i2c_adapter *adap, int speed, int slaveaddr)
 463 {
 464         /* No i2c support prior to relocation */
 465         if (!(gd->flags & GD_FLG_RELOC))
 466                 return;
 467
 468         /* This will override the speed selected in the fdt for that port */
 469         debug("i2c_init(speed=%u, slaveaddr=0x%x)\n", speed, slaveaddr);
 470         i2c_set_bus_speed(speed);
 471 }
 472
 473 /* i2c write version without the register address */
 474 int i2c_write_data(struct i2c_bus *bus, uchar chip, uchar *buffer, int len,
 475                    bool end_with_repeated_start)
 476 {
 477         int rc;
 478
 479         debug("i2c_write_data: chip=0x%x, len=0x%x\n", chip, len);
 480         debug("write_data: ");
 481         /* use rc for counter */
 482         for (rc = 0; rc < len; ++rc)
 483                 debug(" 0x%02x", buffer[rc]);
 484         debug("\n");
 485
 486         /* Shift 7-bit address over for lower-level i2c functions */
 487         rc = tegra_i2c_write_data(bus, chip << 1, buffer, len,
 488                                   end_with_repeated_start);
 489         if (rc)
 490                 debug("i2c_write_data(): rc=%d\n", rc);
 491
 492         return rc;
 493 }
 494
 495 /* i2c read version without the register address */
 496 int i2c_read_data(struct i2c_bus *bus, uchar chip, uchar *buffer, int len)
 497 {
 498         int rc;
 499
 500         debug("inside i2c_read_data():\n");
 501         /* Shift 7-bit address over for lower-level i2c functions */
 502         rc = tegra_i2c_read_data(bus, chip << 1, buffer, len);
 503         if (rc) {
 504                 debug("i2c_read_data(): rc=%d\n", rc);
 505                 return rc;
 506         }
 507
 508         debug("i2c_read_data: ");
 509         /* reuse rc for counter*/
 510         for (rc = 0; rc < len; ++rc)
 511                 debug(" 0x%02x", buffer[rc]);
 512         debug("\n");
 513
 514         return 0;
 515 }
 516
 517 /* Probe to see if a chip is present. */
 518 static int tegra_i2c_probe(struct i2c_adapter *adap, uchar chip)
 519 {
 520         struct i2c_bus *bus;
 521         int rc;
 522         uchar reg;
 523
 524         debug("i2c_probe: addr=0x%x\n", chip);
 525         bus = tegra_i2c_get_bus(adap);
 526         if (!bus)
 527                 return 1;
 528         reg = 0;
 529         rc = i2c_write_data(bus, chip, &reg, 1, false);
 530         if (rc) {
 531                 debug("Error probing 0x%x.\n", chip);
 532                 return 1;
 533         }
 534         return 0;
 535 }
 536
 537 static int i2c_addr_ok(const uint addr, const int alen)
 538 {
 539         /* We support 7 or 10 bit addresses, so one or two bytes each */
 540         return alen == 1 || alen == 2;
 541 }
 542
 543 /* Read bytes */
 544 static int tegra_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
 545                         int alen, uchar *buffer, int len)
 546 {
 547         struct i2c_bus *bus;
 548         uint offset;
 549         int i;
 550
 551         debug("i2c_read: chip=0x%x, addr=0x%x, alen=0x%x len=0x%x\n",
 552               chip, addr, alen, len);
 553         bus = tegra_i2c_get_bus(adap);
 554         if (!bus)
 555                 return 1;
 556         if (!i2c_addr_ok(addr, alen)) {
 557                 debug("i2c_read: Bad address %x.%d.\n", addr, alen);
 558                 return 1;
 559         }
 560         for (offset = 0; offset < len; offset++) {
 561                 if (alen) {
 562                         uchar data[alen];
 563                         for (i = 0; i < alen; i++) {
 564                                 data[alen - i - 1] =
 565                                         (addr + offset) >> (8 * i);
 566                         }
 567                         if (i2c_write_data(bus, chip, data, alen, true)) {
 568                                 debug("i2c_read: error sending (0x%x)\n",
 569                                         addr);
 570                                 return 1;
 571                         }
 572                 }
 573                 if (i2c_read_data(bus, chip, buffer + offset, 1)) {
 574                         debug("i2c_read: error reading (0x%x)\n", addr);
 575                         return 1;
 576                 }
 577         }
 578
 579         return 0;
 580 }
 581
 582 /* Write bytes */
 583 static int tegra_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
 584                         int alen, uchar *buffer, int len)
 585 {
 586         struct i2c_bus *bus;
 587         uint offset;
 588         int i;
 589
 590         debug("i2c_write: chip=0x%x, addr=0x%x, alen=0x%x len=0x%x\n",
 591               chip, addr, alen, len);
 592         bus = tegra_i2c_get_bus(adap);
 593         if (!bus)
 594                 return 1;
 595         if (!i2c_addr_ok(addr, alen)) {
 596                 debug("i2c_write: Bad address %x.%d.\n", addr, alen);
 597                 return 1;
 598         }
 599         for (offset = 0; offset < len; offset++) {
 600                 uchar data[alen + 1];
 601                 for (i = 0; i < alen; i++)
 602                         data[alen - i - 1] = (addr + offset) >> (8 * i);
 603                 data[alen] = buffer[offset];
 604                 if (i2c_write_data(bus, chip, data, alen + 1, false)) {
 605                         debug("i2c_write: error sending (0x%x)\n", addr);
 606                         return 1;
 607                 }
 608         }
 609
 610         return 0;
 611 }
 612
 613 int tegra_i2c_get_dvc_bus_num(void)
 614 {
 615         int i;
 616
 617         for (i = 0; i < TEGRA_I2C_NUM_CONTROLLERS; i++) {
 618                 struct i2c_bus *bus = &i2c_controllers[i];
 619
 620                 if (bus->inited && bus->is_dvc)
 621                         return i;
 622         }
 623
 624         return -1;
 625 }
 626
 627 /*
 628  * Register soft i2c adapters
 629  */
 630 U_BOOT_I2C_ADAP_COMPLETE(tegra0, tegra_i2c_init, tegra_i2c_probe,
 631                          tegra_i2c_read, tegra_i2c_write,
 632                          tegra_i2c_set_bus_speed, 100000, 0, 0)
 633 U_BOOT_I2C_ADAP_COMPLETE(tegra1, tegra_i2c_init, tegra_i2c_probe,
 634                          tegra_i2c_read, tegra_i2c_write,
 635                          tegra_i2c_set_bus_speed, 100000, 0, 1)
 636 U_BOOT_I2C_ADAP_COMPLETE(tegra2, tegra_i2c_init, tegra_i2c_probe,
 637                          tegra_i2c_read, tegra_i2c_write,
 638                          tegra_i2c_set_bus_speed, 100000, 0, 2)
 639 U_BOOT_I2C_ADAP_COMPLETE(tegra3, tegra_i2c_init, tegra_i2c_probe,
 640                          tegra_i2c_read, tegra_i2c_write,
 641                          tegra_i2c_set_bus_speed, 100000, 0, 3)
 642 #if TEGRA_I2C_NUM_CONTROLLERS > 4
 643 U_BOOT_I2C_ADAP_COMPLETE(tegra4, tegra_i2c_init, tegra_i2c_probe,
 644                          tegra_i2c_read, tegra_i2c_write,
 645                          tegra_i2c_set_bus_speed, 100000, 0, 4)
 646 #endif