linux-kernel - Re: [PATCH 2/3] firmware: qcom: scm: Expose download-mode control

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Message-ID: <CAL_JsqL=mhE9AJCszT-pKfmi6u-+dx-RRWcgKzUHSLQeTdYy7Q@mail.gmail.com>
Date:   Mon, 27 Mar 2017 13:53:32 -0500
From:   Rob Herring <robh@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>,
        David Brown <david.brown@...aro.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-soc@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/3] firmware: qcom: scm: Expose download-mode control

On Sun, Mar 26, 2017 at 12:13 AM, Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
> On Fri 24 Mar 08:06 PDT 2017, Rob Herring wrote:
>
>> On Fri, Mar 17, 2017 at 09:15:22PM -0700, Bjorn Andersson wrote:
> [..]
>> > diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.txt b/Documentation/devicetree/bindings/firmware/qcom,scm.txt
>> > index 20f26fbce875..8467a181f22c 100644
>> > --- a/Documentation/devicetree/bindings/firmware/qcom,scm.txt
>> > +++ b/Documentation/devicetree/bindings/firmware/qcom,scm.txt
>> > @@ -18,6 +18,7 @@ Required properties:
>> >   * Core, iface, and bus clocks required for "qcom,scm"
>> >  - clock-names: Must contain "core" for the core clock, "iface" for the interface
>> >    clock and "bus" for the bus clock per the requirements of the compatible.
>> > +- qcom,dload-mode-addr: Specifies the address for the download mode magic (optional)
>>
>> Size? 1 cell, 2 cell(, red cell, blue cell) or follows #addr-cells?
>>
>
> I believe this implementation only applies to the 64-bit systems, but
> it's probably better to make it follow (or at least claim that it
> follows) #address-cells.

Saying it is fixed 2 cells is fine and slightly easier to parse. Just
be explicit.

Rob