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| author |   Martin Sperl <kernel@martin.sperl.org> | 2015-03-23 15:11:53 +0100 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2015-03-23 11:48:58 -0700 |
| commit | 4adf312976ef2b72830b83f212fef3f6a36513a6 (patch) | |
| tree | c3532ec523a70e1127abb8e3134d58c8e4c1979e /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | spi: bcm2835: fix all checkpath --strict messages (diff) | |
| download | linux-dev-4adf312976ef2b72830b83f212fef3f6a36513a6.tar.xz linux-dev-4adf312976ef2b72830b83f212fef3f6a36513a6.zip | |
spi: bcm2835: fill/drain SPI-fifo as much as possible during interrupt
Implement the recommendation from the BCM2835 data-sheet
with regards to polling drivers to fill/drain the FIFO as much data as possible
also for the interrupt-driven case (which this driver is making use of).
This means that for long transfers (>64bytes) we need one interrupt
every 64 bytes instead of every 12 bytes, as the FIFO is 16 words (not bytes) wide.
Tested with mcp251x (can bus), fb_st7735 (TFT framebuffer device)
and enc28j60 (ethernet) drivers.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions