linux-kernel - Re: [PATCH v2 1/2] dt-bindings: remoteproc: Support multiple reserved memory regions

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Message-ID: <6163500e4457715e04d520b7287517acf2ab1dc7.camel@mediatek.com>
Date: Wed, 31 Jul 2024 13:41:10 +0000
From: Shun-Yi Wang (王順億) <Shun-Yi.Wang@...iatek.com>
To: "robh@...nel.org" <robh@...nel.org>, "mathieu.poirier@...aro.org"
	<mathieu.poirier@...aro.org>, "andersson@...nel.org" <andersson@...nel.org>,
	"krzk@...nel.org" <krzk@...nel.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Jason-ch Chen (陳建豪)
	<Jason-ch.Chen@...iatek.com>, Yaya Chang (張雅清)
	<Yaya.Chang@...iatek.com>, "conor+dt@...nel.org" <conor+dt@...nel.org>,
	Project_Global_Chrome_Upstream_Group
	<Project_Global_Chrome_Upstream_Group@...iatek.com>,
	Teddy Chen (陳乾元) <Teddy.Chen@...iatek.com>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	"angelogioacchino.delregno@...labora.com"
	<angelogioacchino.delregno@...labora.com>,
	TingHan Shen (沈廷翰) <TingHan.Shen@...iatek.com>
Subject: Re: [PATCH v2 1/2] dt-bindings: remoteproc: Support multiple reserved
 memory regions

Hi Krzysztof,

Thanks for the reviews.

On Wed, 2024-07-31 at 14:40 +0200, Krzysztof Kozlowski wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  On 31/07/2024 14:17, Shun-yi Wang wrote:
> > From: "shun-yi.wang" <shun-yi.wang@...iatek.com>
> > 
> > Remove the maximum number of 1 for memory regions.
> 
> Why?
> 

For future applications, MTK SCP will reserve multiple regions for
specific hardware use.

> > Instead, add some descriptions to ensure the integrity
> > of the documentation.
> 
> What? How is this related?
> 

My original thinking was to keep the memory-region option.
But currently, there is no maximum value limitation, so I
add some description. Should I just drop the description directly?

Best regards,
Shun-yi

> > 
> > Signed-off-by: shun-yi.wang <shun-yi.wang@...iatek.com>
> > ---
> >  Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml | 8
> ++++++--
> >  1 file changed, 6 insertions(+), 2 deletions(-)
> > 
> > diff --git
> a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> > index d05d1563ec19..3362c8ffdccc 100644
> > --- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> > +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> > @@ -55,7 +55,9 @@ properties:
> >        initializing SCP.
> >  
> >    memory-region:
> > -    maxItems: 1
> 
> No, no, no. Bindings must be specific/constrainted.
> 
> > +    description:
> > +      List of phandles to the reserved memory nodes used by
> > +      remoteproc devices.
> 
> No, drop, it's entirely redundant and pointless. You did not add any
> new
> information. This is always a list, always phandles and always
> reserved
> memory regions. So what does it bring?
> 
> Please do not upstream random junk from your downstream kernel. :(
> 
> Best regards,
> Krzysztof
>