linux-kernel - Re: [PATCH v2 2/2] arm64: dts: qcom: Switch sc7180-trogdor to control SPI CS via GPIO

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Message-ID: <160071882844.4188128.5172158545089744293@swboyd.mtv.corp.google.com>
Date:   Mon, 21 Sep 2020 13:07:08 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Douglas Anderson <dianders@...omium.org>
Cc:     linux-arm-msm@...r.kernel.org, akashast@...eaurora.org,
        Douglas Anderson <dianders@...omium.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] arm64: dts: qcom: Switch sc7180-trogdor to control SPI CS via GPIO

Quoting Douglas Anderson (2020-09-18 17:45:28)
> 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>