target/linux/generic/patches-3.2/470-mtd_m25p80_add_pm25lv_flash_support.patch

   1 --- a/drivers/mtd/devices/m25p80.c
   2 +++ b/drivers/mtd/devices/m25p80.c
   3 @@ -45,6 +45,7 @@
   4  #define        OPCODE_BE_4K            0x20    /* Erase 4KiB block */
   5  #define        OPCODE_BE_32K           0x52    /* Erase 32KiB block */
   6  #define        OPCODE_CHIP_ERASE       0xc7    /* Erase whole flash chip */
   7 +#define        OPCODE_BE_4K_PMC        0xd7    /* Erase 4KiB block on PMC chips*/
   8  #define        OPCODE_SE               0xd8    /* Sector erase (usually 64KiB) */
   9  #define        OPCODE_RDID             0x9f    /* Read JEDEC ID */
  10
  11 @@ -625,6 +626,7 @@ struct flash_info {
  12         u16             flags;
  13  #define        SECT_4K         0x01            /* OPCODE_BE_4K works uniformly */
  14  #define        M25P_NO_ERASE   0x02            /* No erase command needed */
  15 +#define        SECT_4K_PMC     0x04            /* OPCODE_BE_4K_PMC works uniformly */
  16  };
  17
  18  #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags)     \
  19 @@ -686,6 +688,10 @@ static const struct spi_device_id m25p_i
  20         { "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, 0) },
  21         { "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
  22
  23 +       /* PMC -- pm25x "blocks" are 32K, sectors are 4K */
  24 +       { "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) },
  25 +       { "pm25lv010", INFO(0, 0, 32 * 1024, 4, SECT_4K_PMC) },
  26 +
  27         /* Spansion -- single (large) sector size only, at least
  28          * for the chips listed here (without boot sectors).
  29          */
  30 @@ -921,6 +927,9 @@ static int __devinit m25p_probe(struct s
  31         if (info->flags & SECT_4K) {
  32                 flash->erase_opcode = OPCODE_BE_4K;
  33                 flash->mtd.erasesize = 4096;
  34 +       } else if (info->flags & SECT_4K_PMC) {
  35 +               flash->erase_opcode = OPCODE_BE_4K_PMC;
  36 +               flash->mtd.erasesize = 4096;
  37         } else {
  38                 flash->erase_opcode = OPCODE_SE;
  39                 flash->mtd.erasesize = info->sector_size;