diff options
| author | Jonathan Neuschäfer <j.neuschaefer@gmx.net> | 2022-11-24 20:14:00 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-11-25 13:30:16 +0000 |
| commit | 9838c182471ee5532824bae7f2669d3539719f78 (patch) | |
| tree | 5380e4cfd98e7abd17aa6b5189b38d3df6d5aaec /drivers/gpu | |
| parent | 1f8811a2613ef9e233d56885a19dd4c6e81a5d94 (diff) | |
spi: wpcm-fiu: Add direct map support
Besides software controlled SPI transfers (UMA, "user mode access"), FIU
also supports a 16 MiB mapping window per attached flash chip.
This patch implements direct mapped read access, to speed up flash reads.
Without direct mapping:
# time dd if=/dev/mtd0ro of=dump bs=1M
16+0 records in
16+0 records out
real 1m 47.74s
user 0m 0.00s
sys 1m 47.75s
With direct mapping:
# time dd if=/dev/mtd0ro of=dump bs=1M
16+0 records in
16+0 records out
real 0m 30.81s
user 0m 0.00s
sys 0m 30.81s
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20221124191400.287918-4-j.neuschaefer@gmx.net
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/gpu')
0 files changed, 0 insertions, 0 deletions