linux-kernel - Re: [PATCH] arm64: dts: sdm845-mtp: Reserve reserved gpios

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Message-ID: <154130131919.88331.12558287167971033698@swboyd.mtv.corp.google.com>
Date:   Sat, 03 Nov 2018 20:15:19 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Andy Gross <andy.gross@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Stephen Boyd <sboyd@...eaurora.org>
Subject: Re: [PATCH] arm64: dts: sdm845-mtp: Reserve reserved gpios

Quoting Bjorn Andersson (2018-11-02 14:45:32)
> With the introduction of commit 3edfb7bd76bd ("gpiolib: Show correct
> direction from the beginning") the gpiolib will attempt to read the
> direction of all pins, which triggers a read from protected register
> regions.
> 
> The pins 0 through 3 and 81 through 84 are protected, so mark these as
> reserved.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---

Reviewed-by: Stephen Boyd <sboyd@...nel.org>