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| author | Pratyush Yadav <p.yadav@ti.com> | 2020-05-25 11:15:31 +0200 |
|---|---|---|
| committer | Tudor Ambarus <tudor.ambarus@microchip.com> | 2020-05-30 19:22:49 +0200 |
| commit | f9acd7fa80be6ee14aecdc54429f2a48e56224e8 (patch) | |
| tree | 67ee20e2ffc0b551c2f8a1a3bc8ba87d92030da3 /drivers/mtd/spi-nor | |
| parent | mtd: spi-nor: Add support for Cypress cy15x104q (diff) | |
| download | linux-f9acd7fa80be6ee14aecdc54429f2a48e56224e8.tar.xz linux-f9acd7fa80be6ee14aecdc54429f2a48e56224e8.zip | |
mtd: spi-nor: sfdp: default to addr_width of 3 for configurable widths
JESD216D.01 says that when the address width can be 3 or 4, it defaults
to 3 and enters 4-byte mode when given the appropriate command. So, when
we see a configurable width, default to 3 and let flash that default to
4 change it in a post-bfpt fixup.
This fixes SMPT parsing for flashes with configurable address width. If
the SMPT descriptor advertises variable address width, we use
nor->addr_width as the address width. But since it was not set to any
value from the SFDP table, the read command uses an address width of 0,
resulting in an incorrect read being issued.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Diffstat (limited to 'drivers/mtd/spi-nor')
| -rw-r--r-- | drivers/mtd/spi-nor/sfdp.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index f6038d3a3684..688aa36e863a 100644 --- a/drivers/mtd/spi-nor/sfdp.c +++ b/drivers/mtd/spi-nor/sfdp.c @@ -460,6 +460,7 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, /* Number of address bytes. */ switch (bfpt.dwords[BFPT_DWORD(1)] & BFPT_DWORD1_ADDRESS_BYTES_MASK) { case BFPT_DWORD1_ADDRESS_BYTES_3_ONLY: + case BFPT_DWORD1_ADDRESS_BYTES_3_OR_4: nor->addr_width = 3; break; |