linux-kernel - Re: [v2,3/6] dt-binding: reset-controller: ti: add generic-reset to compatible

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Date:   Wed, 5 Aug 2020 11:08:33 +0800
From:   Yingjoe Chen <yingjoe.chen@...iatek.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>
CC:     Crystal Guo <crystal.guo@...iatek.com>, <robh+dt@...nel.org>,
        <matthias.bgg@...il.com>, <srv_heupstream@...iatek.com>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <seiya.wang@...iatek.com>,
        <stanley.chu@...iatek.com>, <fan.chen@...iatek.com>,
        <yong.liang@...iatek.com>, <devicetree@...r.kernel.org>
Subject: Re: [v2,3/6] dt-binding: reset-controller: ti: add generic-reset to
 compatible

On Tue, 2020-08-04 at 10:15 +0200, Philipp Zabel wrote:
> On Mon, 2020-08-03 at 14:15 +0800, Crystal Guo wrote:
> > The TI syscon reset controller provides a common reset management,
> > and should be suitable for other SOCs. Add compatible "generic-reset",
> > which denotes to use a common reset-controller driver.
> > 
> > Signed-off-by: Crystal Guo <crystal.guo@...iatek.com>
> > ---
> >  Documentation/devicetree/bindings/reset/ti-syscon-reset.txt | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt b/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
> > index d551161ae785..e36d3631eab2 100644
> > --- a/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
> > +++ b/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
> > @@ -25,6 +25,7 @@ Required properties:
> >  			    "ti,k2l-pscrst"
> >  			    "ti,k2hk-pscrst"
> >  			    "ti,syscon-reset"
> > +			    "generic-reset", "ti,syscon-reset"
> >   - #reset-cells		: Should be 1. Please see the reset consumer node below
> >  			  for usage details
> >   - ti,reset-bits	: Contains the reset control register information
> > -- 
> > 2.18.0
> 
> My understanding is that it would be better to add a mtk specific
> compatible instead of adding this "generic-reset", especially since we
> can't guarantee this binding will be considered generic in the future.
> I think there is nothing wrong with specifying
> 	compatible = "mtk,your-compatible", "ti,syscon-reset";
> in your device tree if your hardware is indeed compatible with the
> specified "ti,syscon-reset" binding, but I may be wrong: Therefore,
> please add devicetree@...r.kernel.org to Cc: for binding changes.
> 

Hi Philipp,

This would work.
But having "ti" in mtk dts raise alarm for some people inside and
outside of MTK. It would save us some explanation if we could use a more
generic name.

Joe.C