target/linux/generic/patches-3.12/471-mtd-m25p80-allow-to-disable-small-sector-erase.patch

   1 --- a/drivers/mtd/devices/Kconfig
   2 +++ b/drivers/mtd/devices/Kconfig
   3 @@ -109,6 +109,14 @@ config MTD_SPEAR_SMI
   4         help
   5           This enable SNOR support on SPEAR platforms using SMI controller
   6
   7 +config M25PXX_PREFER_SMALL_SECTOR_ERASE
   8 +       bool "Prefer small sector erase"
   9 +       depends on MTD_M25P80
  10 +       default y
  11 +       help
  12 +         This option enables use of the small erase sectors if that is
  13 +         supported by the flash chip.
  14 +
  15  config MTD_SST25L
  16         tristate "Support SST25L (non JEDEC) SPI Flash chips"
  17         depends on SPI_MASTER
  18 --- a/drivers/mtd/devices/m25p80.c
  19 +++ b/drivers/mtd/devices/m25p80.c
  20 @@ -82,6 +82,12 @@
  21
  22  #define JEDEC_MFR(_jedec_id)   ((_jedec_id) >> 16)
  23
  24 +#ifdef CONFIG_M25PXX_PREFER_SMALL_SECTOR_ERASE
  25 +#define PREFER_SMALL_SECTOR_ERASE 1
  26 +#else
  27 +#define PREFER_SMALL_SECTOR_ERASE 0
  28 +#endif
  29 +
  30  /****************************************************************************/
  31
  32  struct m25p {
  33 @@ -1044,7 +1050,7 @@ static int m25p_probe(struct spi_device
  34                 flash->mtd._write = m25p80_write;
  35
  36         /* prefer "small sector" erase if possible */
  37 -       if (info->flags & SECT_4K) {
  38 +       if (PREFER_SMALL_SECTOR_ERASE && (info->flags & SECT_4K)) {
  39                 flash->erase_opcode = OPCODE_BE_4K;
  40                 flash->mtd.erasesize = 4096;
  41         } else if (info->flags & SECT_4K_PMC) {