linux-kernel - Re: [PATCH RFC 1/3] coresight: binding for coresight debug driver

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Date:   Wed, 15 Feb 2017 11:13:44 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Leo Yan <leo.yan@...aro.org>
CC:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Wei Xu <xuwei5@...ilicon.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>, <nd@....com>
Subject: Re: [PATCH RFC 1/3] coresight: binding for coresight debug driver

On Mon, Feb 13, 2017 at 02:11:36PM +0800, Leo Yan wrote:
> Adding compatible string for new coresight debug driver.

Please give a more thorough description of the hardware this binding
this is intended to describe.

It's not entirely clear which component this binding is intended to
describe.

Thanks,
Mark.

> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  Documentation/devicetree/bindings/arm/coresight.txt | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
> index fcbae6a..3ff15fd 100644
> --- a/Documentation/devicetree/bindings/arm/coresight.txt
> +++ b/Documentation/devicetree/bindings/arm/coresight.txt
> @@ -40,6 +40,9 @@ its hardware characteristcs.
>  		- System Trace Macrocell:
>  			"arm,coresight-stm", "arm,primecell"; [1]
>  
> +		- Debug Unit:
> +			"arm,coresight-debug", "arm,primecell";
> +
>  	* reg: physical base address and length of the register
>  	  set(s) of the component.
>  
> @@ -78,8 +81,10 @@ its hardware characteristcs.
>  	* arm,cp14: must be present if the system accesses ETM/PTM management
>  	  registers via co-processor 14.
>  
> -	* cpu: the cpu phandle this ETM/PTM is affined to. When omitted the
> -	  source is considered to belong to CPU0.
> +* Optional properties for ETM/PTM/Debugs:
> +
> +	* cpu: the cpu phandle this ETM/PTM/Debug is affined to. When omitted
> +	  the source is considered to belong to CPU0.
>  
>  * Optional property for TMC:
>  
> -- 
> 2.7.4
>