mtd: spi-nor: sfdp: default to addr_width of 3 for configurable widths

Browse source

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>

...

This commit is contained in:

Pratyush Yadav 2020-05-25 14:45:31 +05:30 • committed by Tudor Ambarus

parent 8a2644d5f3

commit f9acd7fa80

No known key found for this signature in database

GPG key ID: 4B554F47A58D14E9

1 changed files with 1 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/mtd/spi-nor/sfdp.c

View file