target/linux/ramips/patches-4.14/303-spi-nor-enable-4B-opcodes-for-mx66l51235l.patch

   1 --- a/drivers/mtd/spi-nor/spi-nor.c
   2 +++ b/drivers/mtd/spi-nor/spi-nor.c
   3 @@ -1083,7 +1083,7 @@ static const struct flash_info spi_nor_i
   4         { "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
   5         { "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
   6         { "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
   7 -       { "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
   8 +       { "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
   9         { "mx66u51235f", INFO(0xc2253a, 0, 64 * 1024, 1024, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
  10         { "mx66l1g45g",  INFO(0xc2201b, 0, 64 * 1024, 2048, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
  11         { "mx66l1g55g",  INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
  12 @@ -1947,7 +1947,11 @@ static int spi_nor_read_sfdp(struct spi_
  13         nor->read_dummy = 8;
  14
  15         while (len) {
  16 -               ret = nor->read(nor, addr, len, (u8 *)buf);
  17 +               size_t _len = len;
  18 +
  19 +               if (nor->chunk_size)
  20 +                       _len = min(len, nor->chunk_size);
  21 +               ret = nor->read(nor, addr, _len, (u8 *)buf);
  22                 if (!ret || ret > len) {
  23                         ret = -EIO;
  24                         goto read_err;
  25 @@ -2791,6 +2795,7 @@ int spi_nor_scan(struct spi_nor *nor, co
  26         struct device *dev = nor->dev;
  27         struct mtd_info *mtd = &nor->mtd;
  28         struct device_node *np = spi_nor_get_flash_node(nor);
  29 +       u32 val;
  30         int ret;
  31         int i;
  32
  33 @@ -2803,6 +2808,9 @@ int spi_nor_scan(struct spi_nor *nor, co
  34         nor->read_proto = SNOR_PROTO_1_1_1;
  35         nor->write_proto = SNOR_PROTO_1_1_1;
  36
  37 +       if (np && !of_property_read_u32(np, "m25p,chunked-io", &val))
  38 +               nor->chunk_size = val;
  39 +
  40         if (name)
  41                 info = spi_nor_match_id(name);
  42         /* Try to auto-detect if chip name wasn't specified or not found */
  43 @@ -2916,19 +2924,16 @@ int spi_nor_scan(struct spi_nor *nor, co
  44         mtd->writebufsize = nor->page_size;
  45
  46         if (np) {
  47 -               u32 val;
  48 -
  49                 /* If we were instantiated by DT, use it */
  50                 if (of_property_read_bool(np, "m25p,fast-read"))
  51                         params.hwcaps.mask |= SNOR_HWCAPS_READ_FAST;
  52                 else
  53                         params.hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST;
  54
  55 -               if (!of_property_read_u32(np, "m25p,chunked-io", &val)) {
  56 -                       dev_info(dev, "using chunked io (size=%d)\n", val);
  57 +               if (nor->chunk_size) {
  58 +                       dev_info(dev, "using chunked io (size=%d)\n", nor->chunk_size);
  59                         mtd->_read = spi_nor_chunked_read;
  60                         mtd->_write = spi_nor_chunked_write;
  61 -                       nor->chunk_size = val;
  62                 }
  63         } else {
  64                 /* If we weren't instantiated by DT, default to fast-read */