package/boot/uboot-lantiq/patches/0008-sf-eon-add-support-for-4-byte-address-mode.patch

   1 From 37254e3284f61ea495f73a78b7c8efae983781e2 Mon Sep 17 00:00:00 2001
   2 From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   3 Date: Wed, 7 Nov 2012 14:10:07 +0100
   4 Subject: sf: eon: add support for 4-byte address mode
   5
   6 Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   7
   8 --- a/drivers/mtd/spi/eon.c
   9 +++ b/drivers/mtd/spi/eon.c
  10 @@ -10,6 +10,8 @@
  11
  12  #include "spi_flash_internal.h"
  13
  14 +#define EN25XX_EN4B            0xb7    /* Enter 4-byte mode */
  15 +
  16  struct eon_spi_flash_params {
  17         u16 idcode;
  18         u16 nr_sectors;
  19 @@ -29,6 +31,13 @@ static const struct eon_spi_flash_params
  20         },
  21  };
  22
  23 +static __maybe_unused int eon_set_4byte_mode(struct spi_flash *flash)
  24 +{
  25 +       struct spi_slave *spi = flash->spi;
  26 +
  27 +       return spi_flash_cmd(spi, EN25XX_EN4B, NULL, 0);
  28 +}
  29 +
  30  int spi_flash_probe_eon(struct spi_flash *flash, u8 *idcode)
  31  {
  32         const struct eon_spi_flash_params *params;
  33 @@ -57,5 +66,10 @@ int spi_flash_probe_eon(struct spi_flash
  34         flash->size = 256 * 16
  35             * params->nr_sectors;
  36
  37 +#ifdef CONFIG_SPI_FLASH_4BYTE_MODE
  38 +       if (flash->size > (1 << 24))
  39 +               flash->set_4byte_mode = eon_set_4byte_mode;
  40 +#endif
  41 +
  42         return 1;
  43  }