linux-kernel - Re: [PATCH v2 1/2] dt-bindings: rng: Add new compatible qcom,prng-v2

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Message-ID: <20180625190609.GA3586@rob-hp-laptop>
Date:   Mon, 25 Jun 2018 13:06:09 -0600
From:   Rob Herring <robh@...nel.org>
To:     Vinod Koul <vinod.koul@...aro.org>
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org, Stephen Boyd <swboyd@...omium.org>,
        Vinod Koul <vkoul@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: rng: Add new compatible qcom,prng-v2

On Tue, Jun 19, 2018 at 03:24:29PM +0530, Vinod Koul wrote:
> Later qcom chips support v2 of the prng, so add new compatible
> qcom,prng-v2 for this.
> 
> Signed-off-by: Vinod Koul <vkoul@...nel.org>
> ---
> 
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: devicetree@...r.kernel.org
>  Documentation/devicetree/bindings/rng/qcom,prng.txt | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/rng/qcom,prng.txt b/Documentation/devicetree/bindings/rng/qcom,prng.txt
> index 8e5853c2879b..03fd218bd21a 100644
> --- a/Documentation/devicetree/bindings/rng/qcom,prng.txt
> +++ b/Documentation/devicetree/bindings/rng/qcom,prng.txt
> @@ -2,7 +2,8 @@ Qualcomm MSM pseudo random number generator.
>  
>  Required properties:
>  
> -- compatible  : should be "qcom,prng"
> +- compatible  : should be "qcom,prng" for 8916 etc
> +              : should be "qcom,prng-v2" for 8996 and later

Either use SoC specific compatibles or convince me 'v2' is a meaningful 
and specific enough version. Some other QC IP has x.y.z versioning for 
example.

>  - reg         : specifies base physical address and size of the registers map
>  - clocks      : phandle to clock-controller plus clock-specifier pair
>  - clock-names : "core" clocks all registers, FIFO and circuits in PRNG IP block
> -- 
> 2.14.4
>