linux-kernel - Re: [PATCH v3 2/2] arm64: dts: qcom: Switch sc7180-trogdor to control SPI CS via GPIO

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Date:   Tue, 22 Sep 2020 10:19:40 +0530
From:   Akash Asthana <akashast@...eaurora.org>
To:     Douglas Anderson <dianders@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, swboyd@...omium.org,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] arm64: dts: qcom: Switch sc7180-trogdor to control
 SPI CS via GPIO


On 9/22/2020 2:57 AM, Douglas Anderson wrote:
> As talked about in the patch ("arm64: dts: qcom: sc7180: Provide
> pinconf for SPI to use GPIO for CS"), on some boards it makes much
> more sense (and is much more efficient) to think of the SPI Chip
> Select as a GPIO.  Trogdor is one such board where the SPI parts don't
> run in GSI mode and we do a lot of SPI traffic.
>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Akash Asthana <akashast@...eaurora.org>

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