target/linux/pistachio/patches-4.14/414-mtd-spi-nand-Support-Gigadevice-GD5F.patch

   1 From 7723e59d483a883578115a73eb87eb7fff0ff724 Mon Sep 17 00:00:00 2001
   2 From: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
   3 Date: Tue, 28 Feb 2017 10:37:24 +0000
   4 Subject: mtd: spi-nand: Support Gigadevice GD5F
   5
   6 This commit uses the recently introduced SPI NAND framework to support
   7 the Gigadevice GD5F serial NAND device.
   8
   9 The current support includes:
  10
  11   * Page read and page program operations (using on-die ECC)
  12   * Page out-of-band read
  13   * Erase
  14   * Reset
  15   * Device status retrieval
  16   * Device ID retrieval
  17
  18 (based on http://lists.infradead.org/pipermail/linux-mtd/2014-December/056769.html)
  19
  20 Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
  21 Signed-off-by: Ian Pozella <Ian.Pozella@imgtec.com>
  22 ---
  23  drivers/mtd/spi-nand/Kconfig           |  10 +
  24  drivers/mtd/spi-nand/Makefile          |   1 +
  25  drivers/mtd/spi-nand/spi-nand-device.c | 472 +++++++++++++++++++++++++++++++++
  26  3 files changed, 483 insertions(+)
  27  create mode 100644 drivers/mtd/spi-nand/spi-nand-device.c
  28
  29 --- a/drivers/mtd/spi-nand/Kconfig
  30 +++ b/drivers/mtd/spi-nand/Kconfig
  31 @@ -5,3 +5,13 @@ menuconfig MTD_SPI_NAND
  32         help
  33           This is the framework for the SPI NAND.
  34
  35 +if MTD_SPI_NAND
  36 +
  37 +config MTD_SPI_NAND_DEVICES
  38 +       tristate "Support for SPI NAND devices"
  39 +       default y
  40 +       depends on MTD_SPI_NAND
  41 +       help
  42 +         Select this option if you require support for SPI NAND devices.
  43 +
  44 +endif # MTD_SPI_NAND
  45 --- a/drivers/mtd/spi-nand/Makefile
  46 +++ b/drivers/mtd/spi-nand/Makefile
  47 @@ -1 +1,2 @@
  48  obj-$(CONFIG_MTD_SPI_NAND)             += spi-nand-base.o
  49 +obj-$(CONFIG_MTD_SPI_NAND_DEVICES)     += spi-nand-device.o
  50 --- /dev/null
  51 +++ b/drivers/mtd/spi-nand/spi-nand-device.c
  52 @@ -0,0 +1,472 @@
  53 +/*
  54 + * Copyright (C) 2014 Imagination Technologies Ltd.
  55 + *
  56 + * This program is free software; you can redistribute it and/or modify
  57 + * it under the terms of the GNU General Public License as published by
  58 + * the Free Software Foundation; version 2 of the License.
  59 + *
  60 + * Notes:
  61 + * 1. We avoid using a stack-allocated buffer for SPI messages. Using
  62 + *    a kmalloced buffer is probably better, given we shouldn't assume
  63 + *    any particular usage by SPI core.
  64 + */
  65 +
  66 +#include <linux/device.h>
  67 +#include <linux/err.h>
  68 +#include <linux/errno.h>
  69 +#include <linux/module.h>
  70 +#include <linux/mtd/mtd.h>
  71 +#include <linux/mtd/partitions.h>
  72 +#include <linux/mtd/spi-nand.h>
  73 +#include <linux/sizes.h>
  74 +#include <linux/spi/spi.h>
  75 +
  76 +/* SPI NAND commands */
  77 +#define        SPI_NAND_WRITE_ENABLE           0x06
  78 +#define        SPI_NAND_WRITE_DISABLE          0x04
  79 +#define        SPI_NAND_GET_FEATURE            0x0f
  80 +#define        SPI_NAND_SET_FEATURE            0x1f
  81 +#define        SPI_NAND_PAGE_READ              0x13
  82 +#define        SPI_NAND_READ_CACHE             0x03
  83 +#define        SPI_NAND_FAST_READ_CACHE        0x0b
  84 +#define        SPI_NAND_READ_CACHE_X2          0x3b
  85 +#define        SPI_NAND_READ_CACHE_X4          0x6b
  86 +#define        SPI_NAND_READ_CACHE_DUAL_IO     0xbb
  87 +#define        SPI_NAND_READ_CACHE_QUAD_IO     0xeb
  88 +#define        SPI_NAND_READ_ID                0x9f
  89 +#define        SPI_NAND_PROGRAM_LOAD           0x02
  90 +#define        SPI_NAND_PROGRAM_LOAD4          0x32
  91 +#define        SPI_NAND_PROGRAM_EXEC           0x10
  92 +#define        SPI_NAND_PROGRAM_LOAD_RANDOM    0x84
  93 +#define        SPI_NAND_PROGRAM_LOAD_RANDOM4   0xc4
  94 +#define        SPI_NAND_BLOCK_ERASE            0xd8
  95 +#define        SPI_NAND_RESET                  0xff
  96 +
  97 +#define SPI_NAND_GD5F_READID_LEN       2
  98 +
  99 +#define SPI_NAND_GD5F_ECC_MASK         (BIT(0) | BIT(1) | BIT(2))
 100 +#define SPI_NAND_GD5F_ECC_UNCORR       (BIT(0) | BIT(1) | BIT(2))
 101 +#define SPI_NAND_GD5F_ECC_SHIFT                4
 102 +
 103 +static int spi_nand_gd5f_ooblayout_256_ecc(struct mtd_info *mtd, int section,
 104 +                                       struct mtd_oob_region *oobregion)
 105 +{
 106 +       if (section)
 107 +               return -ERANGE;
 108 +
 109 +       oobregion->offset = 128;
 110 +       oobregion->length = 128;
 111 +
 112 +       return 0;
 113 +}
 114 +
 115 +static int spi_nand_gd5f_ooblayout_256_free(struct mtd_info *mtd, int section,
 116 +                                       struct mtd_oob_region *oobregion)
 117 +{
 118 +       if (section)
 119 +               return -ERANGE;
 120 +
 121 +       oobregion->offset = 1;
 122 +       oobregion->length = 127;
 123 +
 124 +       return 0;
 125 +}
 126 +
 127 +static const struct mtd_ooblayout_ops spi_nand_gd5f_oob_256_ops = {
 128 +       .ecc = spi_nand_gd5f_ooblayout_256_ecc,
 129 +       .free = spi_nand_gd5f_ooblayout_256_free,
 130 +};
 131 +
 132 +static struct nand_flash_dev spi_nand_flash_ids[] = {
 133 +       {
 134 +               .name = "SPI NAND 512MiB 3,3V",
 135 +               .id = { NAND_MFR_GIGADEVICE, 0xb4 },
 136 +               .chipsize = 512,
 137 +               .pagesize = SZ_4K,
 138 +               .erasesize = SZ_256K,
 139 +               .id_len = 2,
 140 +               .oobsize = 256,
 141 +               .ecc.strength_ds = 8,
 142 +               .ecc.step_ds = 512,
 143 +       },
 144 +       {
 145 +               .name = "SPI NAND 512MiB 1,8V",
 146 +               .id = { NAND_MFR_GIGADEVICE, 0xa4 },
 147 +               .chipsize = 512,
 148 +               .pagesize = SZ_4K,
 149 +               .erasesize = SZ_256K,
 150 +               .id_len = 2,
 151 +               .oobsize = 256,
 152 +               .ecc.strength_ds = 8,
 153 +               .ecc.step_ds = 512,
 154 +       },
 155 +};
 156 +
 157 +enum spi_nand_device_variant {
 158 +       SPI_NAND_GENERIC,
 159 +       SPI_NAND_GD5F,
 160 +};
 161 +
 162 +struct spi_nand_device_cmd {
 163 +
 164 +       /*
 165 +        * Command and address. I/O errors have been observed if a
 166 +        * separate spi_transfer is used for command and address,
 167 +        * so keep them together.
 168 +        */
 169 +       u32 n_cmd;
 170 +       u8 cmd[5];
 171 +
 172 +       /* Tx data */
 173 +       u32 n_tx;
 174 +       u8 *tx_buf;
 175 +
 176 +       /* Rx data */
 177 +       u32 n_rx;
 178 +       u8 *rx_buf;
 179 +       u8 rx_nbits;
 180 +       u8 tx_nbits;
 181 +};
 182 +
 183 +struct spi_nand_device {
 184 +       struct spi_nand spi_nand;
 185 +       struct spi_device *spi;
 186 +
 187 +       struct spi_nand_device_cmd cmd;
 188 +};
 189 +
 190 +static int spi_nand_send_command(struct spi_device *spi,
 191 +                                struct spi_nand_device_cmd *cmd)
 192 +{
 193 +       struct spi_message message;
 194 +       struct spi_transfer x[2];
 195 +
 196 +       if (!cmd->n_cmd) {
 197 +               dev_err(&spi->dev, "cannot send an empty command\n");
 198 +               return -EINVAL;
 199 +       }
 200 +
 201 +       if (cmd->n_tx && cmd->n_rx) {
 202 +               dev_err(&spi->dev, "cannot send and receive data at the same time\n");
 203 +               return -EINVAL;
 204 +       }
 205 +
 206 +       spi_message_init(&message);
 207 +       memset(x, 0, sizeof(x));
 208 +
 209 +       /* Command and address */
 210 +       x[0].len = cmd->n_cmd;
 211 +       x[0].tx_buf = cmd->cmd;
 212 +       x[0].tx_nbits = cmd->tx_nbits;
 213 +       spi_message_add_tail(&x[0], &message);
 214 +
 215 +       /* Data to be transmitted */
 216 +       if (cmd->n_tx) {
 217 +               x[1].len = cmd->n_tx;
 218 +               x[1].tx_buf = cmd->tx_buf;
 219 +               x[1].tx_nbits = cmd->tx_nbits;
 220 +               spi_message_add_tail(&x[1], &message);
 221 +       }
 222 +
 223 +       /* Data to be received */
 224 +       if (cmd->n_rx) {
 225 +               x[1].len = cmd->n_rx;
 226 +               x[1].rx_buf = cmd->rx_buf;
 227 +               x[1].rx_nbits = cmd->rx_nbits;
 228 +               spi_message_add_tail(&x[1], &message);
 229 +       }
 230 +
 231 +       return spi_sync(spi, &message);
 232 +}
 233 +
 234 +static int spi_nand_device_reset(struct spi_nand *snand)
 235 +{
 236 +       struct spi_nand_device *snand_dev = snand->priv;
 237 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 238 +
 239 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 240 +       cmd->n_cmd = 1;
 241 +       cmd->cmd[0] = SPI_NAND_RESET;
 242 +
 243 +       dev_dbg(snand->dev, "%s\n", __func__);
 244 +
 245 +       return spi_nand_send_command(snand_dev->spi, cmd);
 246 +}
 247 +
 248 +static int spi_nand_device_read_reg(struct spi_nand *snand, u8 opcode, u8 *buf)
 249 +{
 250 +       struct spi_nand_device *snand_dev = snand->priv;
 251 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 252 +
 253 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 254 +       cmd->n_cmd = 2;
 255 +       cmd->cmd[0] = SPI_NAND_GET_FEATURE;
 256 +       cmd->cmd[1] = opcode;
 257 +       cmd->n_rx = 1;
 258 +       cmd->rx_buf = buf;
 259 +
 260 +       dev_dbg(snand->dev, "%s: reg 0%x\n", __func__, opcode);
 261 +
 262 +       return spi_nand_send_command(snand_dev->spi, cmd);
 263 +}
 264 +
 265 +static int spi_nand_device_write_reg(struct spi_nand *snand, u8 opcode, u8 *buf)
 266 +{
 267 +       struct spi_nand_device *snand_dev = snand->priv;
 268 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 269 +
 270 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 271 +       cmd->n_cmd = 2;
 272 +       cmd->cmd[0] = SPI_NAND_SET_FEATURE;
 273 +       cmd->cmd[1] = opcode;
 274 +       cmd->n_tx = 1;
 275 +       cmd->tx_buf = buf;
 276 +
 277 +       dev_dbg(snand->dev, "%s: reg 0%x\n", __func__, opcode);
 278 +
 279 +       return spi_nand_send_command(snand_dev->spi, cmd);
 280 +}
 281 +
 282 +static int spi_nand_device_write_enable(struct spi_nand *snand)
 283 +{
 284 +       struct spi_nand_device *snand_dev = snand->priv;
 285 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 286 +
 287 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 288 +       cmd->n_cmd = 1;
 289 +       cmd->cmd[0] = SPI_NAND_WRITE_ENABLE;
 290 +
 291 +       dev_dbg(snand->dev, "%s\n", __func__);
 292 +
 293 +       return spi_nand_send_command(snand_dev->spi, cmd);
 294 +}
 295 +
 296 +static int spi_nand_device_write_disable(struct spi_nand *snand)
 297 +{
 298 +       struct spi_nand_device *snand_dev = snand->priv;
 299 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 300 +
 301 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 302 +       cmd->n_cmd = 1;
 303 +       cmd->cmd[0] = SPI_NAND_WRITE_DISABLE;
 304 +
 305 +       dev_dbg(snand->dev, "%s\n", __func__);
 306 +
 307 +       return spi_nand_send_command(snand_dev->spi, cmd);
 308 +}
 309 +
 310 +static int spi_nand_device_write_page(struct spi_nand *snand,
 311 +                                     unsigned int page_addr)
 312 +{
 313 +       struct spi_nand_device *snand_dev = snand->priv;
 314 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 315 +
 316 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 317 +       cmd->n_cmd = 4;
 318 +       cmd->cmd[0] = SPI_NAND_PROGRAM_EXEC;
 319 +       cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16);
 320 +       cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8);
 321 +       cmd->cmd[3] = (u8)(page_addr & 0xff);
 322 +
 323 +       dev_dbg(snand->dev, "%s: page 0x%x\n", __func__, page_addr);
 324 +
 325 +       return spi_nand_send_command(snand_dev->spi, cmd);
 326 +}
 327 +
 328 +static int spi_nand_device_store_cache(struct spi_nand *snand,
 329 +                                      unsigned int page_offset, size_t length,
 330 +                                      u8 *write_buf)
 331 +{
 332 +       struct spi_nand_device *snand_dev = snand->priv;
 333 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 334 +       struct spi_device *spi = snand_dev->spi;
 335 +
 336 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 337 +       cmd->n_cmd = 3;
 338 +       cmd->cmd[0] = spi->mode & SPI_TX_QUAD ? SPI_NAND_PROGRAM_LOAD4 :
 339 +                       SPI_NAND_PROGRAM_LOAD;
 340 +       cmd->cmd[1] = (u8)((page_offset & 0xff00) >> 8);
 341 +       cmd->cmd[2] = (u8)(page_offset & 0xff);
 342 +       cmd->n_tx = length;
 343 +       cmd->tx_buf = write_buf;
 344 +       cmd->tx_nbits = spi->mode & SPI_TX_QUAD ? 4 : 1;
 345 +
 346 +       dev_dbg(snand->dev, "%s: offset 0x%x\n", __func__, page_offset);
 347 +
 348 +       return spi_nand_send_command(snand_dev->spi, cmd);
 349 +}
 350 +
 351 +static int spi_nand_device_load_page(struct spi_nand *snand,
 352 +                                    unsigned int page_addr)
 353 +{
 354 +       struct spi_nand_device *snand_dev = snand->priv;
 355 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 356 +
 357 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 358 +       cmd->n_cmd = 4;
 359 +       cmd->cmd[0] = SPI_NAND_PAGE_READ;
 360 +       cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16);
 361 +       cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8);
 362 +       cmd->cmd[3] = (u8)(page_addr & 0xff);
 363 +
 364 +       dev_dbg(snand->dev, "%s: page 0x%x\n", __func__, page_addr);
 365 +
 366 +       return spi_nand_send_command(snand_dev->spi, cmd);
 367 +}
 368 +
 369 +static int spi_nand_device_read_cache(struct spi_nand *snand,
 370 +                                     unsigned int page_offset, size_t length,
 371 +                                     u8 *read_buf)
 372 +{
 373 +       struct spi_nand_device *snand_dev = snand->priv;
 374 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 375 +       struct spi_device *spi = snand_dev->spi;
 376 +
 377 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 378 +       if ((spi->mode & SPI_RX_DUAL) || (spi->mode & SPI_RX_QUAD))
 379 +               cmd->n_cmd = 5;
 380 +       else
 381 +               cmd->n_cmd = 4;
 382 +       cmd->cmd[0] = (spi->mode & SPI_RX_QUAD) ? SPI_NAND_READ_CACHE_X4 :
 383 +                       ((spi->mode & SPI_RX_DUAL) ? SPI_NAND_READ_CACHE_X2 :
 384 +                       SPI_NAND_READ_CACHE);
 385 +       cmd->cmd[1] = 0; /* dummy byte */
 386 +       cmd->cmd[2] = (u8)((page_offset & 0xff00) >> 8);
 387 +       cmd->cmd[3] = (u8)(page_offset & 0xff);
 388 +       cmd->cmd[4] = 0; /* dummy byte */
 389 +       cmd->n_rx = length;
 390 +       cmd->rx_buf = read_buf;
 391 +       cmd->rx_nbits = (spi->mode & SPI_RX_QUAD) ? 4 :
 392 +                       ((spi->mode & SPI_RX_DUAL) ? 2 : 1);
 393 +
 394 +       dev_dbg(snand->dev, "%s: offset 0x%x\n", __func__, page_offset);
 395 +
 396 +       return spi_nand_send_command(snand_dev->spi, cmd);
 397 +}
 398 +
 399 +static int spi_nand_device_block_erase(struct spi_nand *snand,
 400 +                                      unsigned int page_addr)
 401 +{
 402 +       struct spi_nand_device *snand_dev = snand->priv;
 403 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 404 +
 405 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 406 +       cmd->n_cmd = 4;
 407 +       cmd->cmd[0] = SPI_NAND_BLOCK_ERASE;
 408 +       cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16);
 409 +       cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8);
 410 +       cmd->cmd[3] = (u8)(page_addr & 0xff);
 411 +
 412 +       dev_dbg(snand->dev, "%s: block 0x%x\n", __func__, page_addr);
 413 +
 414 +       return spi_nand_send_command(snand_dev->spi, cmd);
 415 +}
 416 +
 417 +static int spi_nand_gd5f_read_id(struct spi_nand *snand, u8 *buf)
 418 +{
 419 +       struct spi_nand_device *snand_dev = snand->priv;
 420 +       struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
 421 +
 422 +       memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
 423 +       cmd->n_cmd = 1;
 424 +       cmd->cmd[0] = SPI_NAND_READ_ID;
 425 +       cmd->n_rx = SPI_NAND_GD5F_READID_LEN;
 426 +       cmd->rx_buf = buf;
 427 +
 428 +       dev_dbg(snand->dev, "%s\n", __func__);
 429 +
 430 +       return spi_nand_send_command(snand_dev->spi, cmd);
 431 +}
 432 +
 433 +static void spi_nand_gd5f_ecc_status(unsigned int status,
 434 +                                    unsigned int *corrected,
 435 +                                    unsigned int *ecc_error)
 436 +{
 437 +       unsigned int ecc_status = (status >> SPI_NAND_GD5F_ECC_SHIFT) &
 438 +                                            SPI_NAND_GD5F_ECC_MASK;
 439 +
 440 +       *ecc_error = (ecc_status == SPI_NAND_GD5F_ECC_UNCORR) ? 1 : 0;
 441 +       if (*ecc_error == 0)
 442 +               *corrected = (ecc_status > 1) ? (2 + ecc_status) : 0;
 443 +}
 444 +
 445 +static int spi_nand_device_probe(struct spi_device *spi)
 446 +{
 447 +       enum spi_nand_device_variant variant;
 448 +       struct spi_nand_device *priv;
 449 +       struct spi_nand *snand;
 450 +       int ret;
 451 +
 452 +       priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL);
 453 +       if (!priv)
 454 +               return -ENOMEM;
 455 +
 456 +       snand = &priv->spi_nand;
 457 +
 458 +       snand->read_cache = spi_nand_device_read_cache;
 459 +       snand->load_page = spi_nand_device_load_page;
 460 +       snand->store_cache = spi_nand_device_store_cache;
 461 +       snand->write_page = spi_nand_device_write_page;
 462 +       snand->write_reg = spi_nand_device_write_reg;
 463 +       snand->read_reg = spi_nand_device_read_reg;
 464 +       snand->block_erase = spi_nand_device_block_erase;
 465 +       snand->reset = spi_nand_device_reset;
 466 +       snand->write_enable = spi_nand_device_write_enable;
 467 +       snand->write_disable = spi_nand_device_write_disable;
 468 +       snand->dev = &spi->dev;
 469 +       snand->priv = priv;
 470 +
 471 +       /* This'll mean we won't need to specify any specific compatible string
 472 +        * for a given device, and instead just support spi-nand.
 473 +        */
 474 +       variant = spi_get_device_id(spi)->driver_data;
 475 +       switch (variant) {
 476 +       case SPI_NAND_GD5F:
 477 +               snand->read_id = spi_nand_gd5f_read_id;
 478 +               snand->get_ecc_status = spi_nand_gd5f_ecc_status;
 479 +               snand->ooblayout = &spi_nand_gd5f_oob_256_ops;
 480 +               break;
 481 +       default:
 482 +               dev_err(snand->dev, "unknown device\n");
 483 +               return -ENODEV;
 484 +       }
 485 +
 486 +       spi_set_drvdata(spi, snand);
 487 +       priv->spi = spi;
 488 +
 489 +       ret = spi_nand_register(snand, spi_nand_flash_ids);
 490 +       if (ret)
 491 +               return ret;
 492 +       return 0;
 493 +}
 494 +
 495 +static int spi_nand_device_remove(struct spi_device *spi)
 496 +{
 497 +       struct spi_nand *snand = spi_get_drvdata(spi);
 498 +
 499 +       spi_nand_unregister(snand);
 500 +
 501 +       return 0;
 502 +}
 503 +
 504 +const struct spi_device_id spi_nand_id_table[] = {
 505 +       { "spi-nand", SPI_NAND_GENERIC },
 506 +       { "gd5f", SPI_NAND_GD5F },
 507 +       { },
 508 +};
 509 +MODULE_DEVICE_TABLE(spi, spi_nand_id_table);
 510 +
 511 +static struct spi_driver spi_nand_device_driver = {
 512 +       .driver = {
 513 +               .name   = "spi_nand_device",
 514 +               .owner  = THIS_MODULE,
 515 +       },
 516 +       .id_table = spi_nand_id_table,
 517 +       .probe  = spi_nand_device_probe,
 518 +       .remove = spi_nand_device_remove,
 519 +};
 520 +module_spi_driver(spi_nand_device_driver);
 521 +
 522 +MODULE_AUTHOR("Ezequiel Garcia <ezequiel.garcia@imgtec.com>");
 523 +MODULE_DESCRIPTION("SPI NAND device support");
 524 +MODULE_LICENSE("GPL v2");