linux-kernel - Re: [PATCH 2/3] dt-bindings: pinctrl: Add a ngpios-ranges property

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Message-ID: <73078b7c-c3dd-0927-a82a-fb9369f5b576@codeaurora.org>
Date:   Thu, 11 Jan 2018 10:36:38 -0600
From:   Timur Tabi <timur@...eaurora.org>
To:     Grant Likely <grant.likely@...retlab.ca>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Stephen Boyd <sboyd@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-gpio@...r.kernel.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/3] dt-bindings: pinctrl: Add a ngpios-ranges property

On 01/11/2018 10:33 AM, Grant Likely wrote:
> What level of access control is implemented here? Is there access
> control for each GPIO individually, or is it done by banks of GPIOs?
> Just asking to make sure I understand the problem domain.

On our ACPI system, it's specific GPIOs.  Each GPIO is in its own 64k 
page, which is what allows us to block specific ones.

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