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From:   Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
To:     agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org,
        robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
        broonie@kernel.org, vkoul@kernel.org,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org
Cc:     quic_msavaliy@quicinc.com, dianders@chromium.org, mka@chromium.org,
        swboyd@chromium.org, quic_vtanuku@quicinc.com,
        Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Subject: [PATCH 0/2] spi: Add DMA mode support to spi-qcom-qspi
Date:   Tue,  4 Apr 2023 23:33:18 +0530
Message-Id: <1680631400-28865-1-git-send-email-quic_vnivarth@quicinc.com>
Precedence: bulk

There are large number of QSPI irqs that fire during boot/init and later
on every suspend/resume.
This could be made faster by doing DMA instead of PIO.
Below is comparison for number of interrupts raised in 2 acenarios...
Boot up and stabilise
Suspend/Resume

Sequence   PIO    DMA
=======================
Boot-up    69088  19284
S/R        5066   3430

Vijaya Krishna Nivarthi (2):
  arm64: dts: qcom: sc7280: Add stream-id of qspi to iommus
  spi: spi-qcom-qspi: Add DMA mode support

 arch/arm64/boot/dts/qcom/sc7280.dtsi |   1 +
 drivers/spi/spi-qcom-qspi.c          | 429 ++++++++++++++++++++++++++++++++---
 2 files changed, 399 insertions(+), 31 deletions(-)

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