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| author | Sai Krishna Potthuri <sai.krishna.potthuri@amd.com> | 2023-03-20 15:29:31 +0530 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-04-17 18:16:39 +0100 |
| commit | c0b53f4e545e4c6106aab553eb351138d46211cc (patch) | |
| tree | 13c7b6b29ecb99ebd4e66f0e76b92e792b395bca /drivers/fpga/machxo2-spi.c | |
| parent | 22c8ce0aa274cea2ff538ffdf723053ecf77d78b (diff) | |
spi: cadence-quadspi: Disable the SPI before reconfiguring
Observed random DMA timeout failures while doing back to back
transfers which involves switching the modes from DMA to NON-DMA.
This issue is observed while testing the OSPI+UBIFS file system test case
where rootfs is mounted from OSPI UBIFS partition.
To avoid this issue, disable the SPI before changing the configuration
from external DMA to NON-DMA and vice versa and reenable it after changing
the configuration.
As per the Cadence Octal SPI design specification, it is recommended to
disable the Octal-SPI enable bit before reconfiguring.
Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>
Link: https://lore.kernel.org/r/20230320095931.2651714-3-sai.krishna.potthuri@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/fpga/machxo2-spi.c')
0 files changed, 0 insertions, 0 deletions