linux-kernel - Re: [PATCH v6 3/4] dt-bindings: watchdog: aspeed-wdt: Add aspeed,scu

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Date: Tue, 02 Apr 2024 22:39:32 +1030
From: Andrew Jeffery <andrew@...econstruct.com.au>
To: Rob Herring <robh@...nel.org>, Peter Yin <peteryin.openbmc@...il.com>
Cc: patrick@...cx.xyz, Wim Van Sebroeck <wim@...ux-watchdog.org>, Guenter
 Roeck <linux@...ck-us.net>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>,  Conor Dooley <conor+dt@...nel.org>,
 Joel Stanley <joel@....id.au>, linux-watchdog@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 3/4] dt-bindings: watchdog: aspeed-wdt: Add aspeed,scu

On Mon, 2024-04-01 at 08:56 -0500, Rob Herring wrote:
> On Thu, Mar 28, 2024 at 10:22:30AM +0800, Peter Yin wrote:
> > To use the SCU register to obtain reset flags for supporting
> > bootstatus.
> > 
> > Signed-off-by: Peter Yin <peteryin.openbmc@...il.com>
> > ---
> >  Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
> > index 3208adb3e52e..80a1f58b5a2e 100644
> > --- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
> > +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
> > @@ -8,6 +8,8 @@ Required properties:
> >  
> >   - reg: physical base address of the controller and length of memory mapped
> >     region
> > + - aspeed,scu: a reference to the System Control Unit node of the Aspeed
> > +   SOC.
> 
> You cannot add new required properties as that is an ABI break.
> 
> If there's only 1 SCU instance, you can just fetch its node by 
> compatible with no DT change.
> 
> What's the plan for converting this binding to schema? This is the 2nd 
> new property in 6 months.

I had a patch converting it in a local branch which I've now sent:

https://lore.kernel.org/all/20240402120118.282035-1-andrew@codeconstruct.com.au/

Perhaps we can pull it into this series?

Andrew