From: Douglas Anderson <dianders@chromium.org>
To: Mark Brown <broonie@kernel.org>, Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: swboyd@chromium.org, linux-arm-msm@vger.kernel.org,
ctheegal@codeaurora.org, mkshah@codeaurora.org, mka@chromium.org,
Rajendra Nayak <rnayak@codeaurora.org>,
akashast@codeaurora.org, georgi.djakov@linaro.org,
Douglas Anderson <dianders@chromium.org>,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org
Subject: [PATCH v2 0/2] spi: spi-qcom-qspi: Avoid some per-transfer overhead
Date: Thu, 9 Jul 2020 07:51:43 -0700 [thread overview]
Message-ID: <20200709145145.4055619-1-dianders@chromium.org> (raw)
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
next reply other threads:[~2020-07-09 14:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 14:51 Douglas Anderson [this message]
2020-07-09 14:51 ` [PATCH v2 1/2] spi: spi-qcom-qspi: Avoid clock setting if not needed Douglas Anderson
2020-07-09 14:51 ` [PATCH v2 2/2] spi: spi-qcom-qspi: Set an autosuspend delay of 250 ms Douglas Anderson
2020-07-10 4:45 ` [PATCH v2 0/2] spi: spi-qcom-qspi: Avoid some per-transfer overhead Akash Asthana
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