On 7/8/2020 1:46 AM, Douglas Anderson wrote:
Not to be confused with the similar series I posed for the _other_
Qualcomm SPI controller (spi-geni-qcom) [1], this one avoids the
overhead on the Quad SPI controller.
It's based atop the current Qualcomm tree including Rajendra's ("spi:
spi-qcom-qspi: Use OPP API to set clk/perf state"). As discussed in
individual patches, these could ideally land through the Qualcomm tree
with Mark's Ack.
Measuring:
* Before OPP / Interconnect patches reading all flash takes: ~3.4 seconds
* After OPP / Interconnect patches reading all flash takes: ~4.7 seconds
* After this patch reading all flash takes: ~3.3 seconds
Thanks Doug, I saw similar benefit on my setup with these patches. They do help
reduce the (unnecessary) additional overhead so it makes sense to merge these
along with the OPP/Interconnect patches in-order to avoid the regression.
Reviewed-by: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
Tested-by: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
[1] https://lore.kernel.org/r/20200702004509.2333554-1-dianders@xxxxxxxxxxxx
[2] https://lore.kernel.org/r/1593769293-6354-2-git-send-email-rnayak@xxxxxxxxxxxxxx
Douglas Anderson (2):
spi: spi-qcom-qspi: Avoid clock setting if not needed
spi: spi-qcom-qspi: Set an autosuspend delay of 250 ms
drivers/spi/spi-qcom-qspi.c | 45 ++++++++++++++++++++++++++++---------
1 file changed, 35 insertions(+), 10 deletions(-)
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