Messages in this thread |  | | From | Douglas Anderson <> | Subject | [PATCH v2 0/2] spi: spi-qcom-qspi: Avoid some per-transfer overhead | Date | Thu, 9 Jul 2020 07:51:43 -0700 |
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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
[1] https://lore.kernel.org/r/20200702004509.2333554-1-dianders@chromium.org [2] https://lore.kernel.org/r/1593769293-6354-2-git-send-email-rnayak@codeaurora.org
Changes in v2: - Return error from runtime resume if dev_pm_opp_set_rate() fails.
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 | 43 ++++++++++++++++++++++++++++--------- 1 file changed, 33 insertions(+), 10 deletions(-)
-- 2.27.0.383.g050319c2ae-goog
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