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| author | Yicong Yang <yangyicong@hisilicon.com> | 2020-07-06 17:22:36 +0800 |
|---|---|---|
| committer | Tudor Ambarus <tudor.ambarus@microchip.com> | 2020-07-13 12:09:52 +0300 |
| commit | cc59e6bb6cd69d3347c06ccce088c5c6052e041e (patch) | |
| tree | fd3cd1bd329abe7802c348e42af6829e9ae046ff /lib | |
| parent | be192209d5a33c912caa4a05d6f92b89328d8db8 (diff) | |
| download | lwn-cc59e6bb6cd69d3347c06ccce088c5c6052e041e.tar.gz lwn-cc59e6bb6cd69d3347c06ccce088c5c6052e041e.zip | |
mtd: spi-nor: Disable the flash quad mode in spi_nor_restore()
If the flash's quad mode is enabled, it'll remain in the quad mode when
it's removed. If we drive the flash next time in Standard/Dual SPI mode,
the QE bit is not cleared and the function of flash's WP# and RESET#/HOLD#
have been switched to IO2 and IO3 and are not restored.
Disable the Quad mode in spi_nor_restore(), then the flash's QE bit will
be cleared when removed. This will make sure the flash always enter the
Standard/Dual SPI mode when loaded.
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Link: https://lore.kernel.org/r/1594027356-19088-3-git-send-email-yangyicong@hisilicon.com
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions