linux-kernel - Re: [RFC PATCH v1 1/3] riscv: dts: starfive: jh7110: add timer node

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Message-ID: <20250124-unweave-stainable-debbb0e75cd4@spud>
Date: Fri, 24 Jan 2025 16:40:40 +0000
From: Conor Dooley <conor@...nel.org>
To: E Shattow <e@...eshell.de>
Cc: Emil Renner Berthing <kernel@...il.dk>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [RFC PATCH v1 1/3] riscv: dts: starfive: jh7110: add timer node

On Fri, Jan 24, 2025 at 03:19:33AM -0800, E Shattow wrote:
> 
> On 1/13/25 10:39, Conor Dooley wrote:
> > On Thu, Jan 02, 2025 at 12:41:21PM -0800, E Shattow wrote:
> > > no idea if this does anything useful; not needed for boot
> > > 
> > > Signed-off-by: E Shattow <e@...eshell.de>
> > > ---
> > >   arch/riscv/boot/dts/starfive/jh7110.dtsi | 9 +++++++++
> > >   1 file changed, 9 insertions(+)
> > > 
> > > diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> > > index 0d8339357bad..0bc922b3ae8a 100644
> > > --- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
> > > +++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> > > @@ -344,6 +344,15 @@ tdm_ext: tdm-ext-clock {
> > >   		#clock-cells = <0>;
> > >   	};
> > > +	timer {
> > > +		compatible = "riscv, timer";
> > 
> > compatible has an extra space, so won't do anything!
> > 
> > > +		interrupts-extended = <&cpu0_intc 5>,
> > > +				      <&cpu1_intc 5>,
> > > +				      <&cpu2_intc 5>,
> > > +				      <&cpu3_intc 5>,
> > > +				      <&cpu4_intc 5>;
> > > +	};
> > > +
> > >   	soc {
> > >   		compatible = "simple-bus";
> > >   		interrupt-parent = <&plic>;
> > > -- 
> > > 2.45.2
> > > 
> 
> That extra space is my error and does not exist in U-Boot. Good catch! So,
> when corrected it appears to boot either way with or without and not any
> change in functionality that I can discern. My priority then for this series
> is to drop this patch as something unnecessary.

I don't mind having it, if it makes the hw description more complete,
even if not used.

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