linux-kernel - Re: [PATCH v4 1/5] dt-bindings: gpio: Add a gpio-reserved-ranges property

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Message-ID: <20180326222511.hc6tzwb7n3svum2a@rob-hp-laptop>
Date:   Mon, 26 Mar 2018 17:25:11 -0500
From:   Rob Herring <robh@...nel.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Timur Tabi <timur@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Grant Likely <grant.likely@...retlab.ca>,
        linux-gpio@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v4 1/5] dt-bindings: gpio: Add a gpio-reserved-ranges
 property

On Fri, Mar 23, 2018 at 09:34:49AM -0700, Stephen Boyd wrote:
> From: Stephen Boyd <sboyd@...eaurora.org>
> 
> Some qcom platforms make some GPIOs or pins unavailable for use
> by non-secure operating systems, and thus reading or writing the
> registers for those pins will cause access control issues.
> Introduce a DT property to describe the set of GPIOs that are
> available for use so that higher level OSes are able to know what
> pins to avoid reading/writing.
> 
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Cc: <devicetree@...r.kernel.org>
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> ---
>  Documentation/devicetree/bindings/gpio/gpio.txt | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)

Reviewed-by: Rob Herring <robh@...nel.org>