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| author | Daniel Golle <daniel@makrotopia.org> | 2018-06-07 01:51:58 +0200 |
|---|---|---|
| committer | Jo-Philipp Wich <jo@mein.io> | 2018-12-18 09:43:58 +0100 |
| commit | cc7fa7fcecbdf31828ee0fd3ce23aef144c43c9d (patch) | |
| tree | c568a38a507b040a7a56f63adcf5cc1035fc2cf5 /toolchain/glibc/headers | |
| parent | a6b561dd01d3f0bd2b207a6ca37e34caa3bf49e5 (diff) | |
| download | upstream-cc7fa7fcecbdf31828ee0fd3ce23aef144c43c9d.tar.gz upstream-cc7fa7fcecbdf31828ee0fd3ce23aef144c43c9d.tar.bz2 upstream-cc7fa7fcecbdf31828ee0fd3ce23aef144c43c9d.zip | |
ramips: fix reboot with W25Q256 with 4-address-mode enabled
Some board vendors actually changed the loader to expect the chip
to come up in 4-address-mode and flipped the ADP bit in the flash
chip's configuration register which makes it come up in 4-address-mode.
Hence it doesn't make sense to avoid switching to 4-address-mode on
those boards but the opposite as otherwise reboot hangs eg. on the
WrtNode2 boards. Fix this by checking the ADP register and only using
SPI_NOR_4B_READ_OP on chips which have ADP==0 (come up in 3-byte mode).
See also datasheet section 7.1.11 Power Up Address Mode (ADP)
Fixes: 22d982ea0 ("ramips: add support for switching between 3-byte and 4-byte addressing on w25q256 flash")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(backported from 8796680277f4b231386fbc6e8a1ccae91d9fcbe8)
Diffstat (limited to 'toolchain/glibc/headers')
0 files changed, 0 insertions, 0 deletions