linux-kernel - Re: [PATCH v2 3/7] dt-bindings: remoteproc: qcom: Fixup regulator dependencies

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Date:   Mon, 17 Dec 2018 16:00:58 -0800
From:   Doug Anderson <dianders@...omium.org>
To:     sibis@...eaurora.org
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-soc@...r.kernel.org>,
        devicetree@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        tsoni@...eaurora.org, clew@...eaurora.org, akdwived@...eaurora.org,
        Mark Rutland <mark.rutland@....com>,
        linux-remoteproc@...r.kernel.org,
        Evan Green <evgreen@...omium.org>,
        Brian Norris <briannorris@...omium.org>
Subject: Re: [PATCH v2 3/7] dt-bindings: remoteproc: qcom: Fixup regulator dependencies

Hi,

On Mon, Dec 17, 2018 at 2:08 AM Sibi Sankar <sibis@...eaurora.org> wrote:
>
> Fixup regulator supply dependencies for Q6V5 MSS on MSM996 SoCs.
>
> Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
> ---
>  Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
> index 780adc043b37..98894e6ad456 100644
> --- a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
> @@ -76,7 +76,9 @@ on the Qualcomm Hexagon core.
>         Usage: required
>         Value type: <phandle>
>         Definition: reference to the regulators to be held on behalf of the
> -                   booting of the Hexagon core
> +                   booting of the Hexagon core on MSM8916 SoCs
> +                   reference to the pll-supply regulator to be held on behalf
> +                   of the booting of the Hexagon core on MSM8996 SoCs

The prose gets in the way and doesn't add anything.  I also don't
understand what you're saying for msm8996.  You're saying that
"pll-supply" is required there but none of the others?  That doesn't
seem to be true in the code I have in front of me, but maybe I'm
missing some patch.  For me, I'd write:

For the compatible strings below the following supplies are required:
  "qcom,q6v5-pil"
  "qcom,msm8916-mss-pil",
  "qcom,msm8974-mss-pil"
- cx-supply:
- mss-supply:
- mx-supply:
- pll-supply:
Usage: required
Value type: <phandle>
Definition: reference to the regulators to be held on behalf of the
    booting of the Hexagon core


...and if msm8996 actually needs "pll-supply", you could add in...

For the compatible strings below the following supplies are required:
  "qcom,msm8996-mss-pil"
- pll-supply:
Usage: required
Value type: <phandle>
Definition: reference to the regulators to be held on behalf of the
    booting of the Hexagon core