linux-kernel - Re: 回复: [v2] riscv: dts: starfive: jh7110: Add camera subsystem nodes

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Date: Thu, 1 Feb 2024 18:37:52 +0000
From: Conor Dooley <conor@...nel.org>
To: Changhuang Liang <changhuang.liang@...rfivetech.com>
Cc: Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Emil Renner Berthing <kernel@...il.dk>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Jack Zhu <jack.zhu@...rfivetech.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: 回复: [v2] riscv: dts:
 starfive: jh7110: Add camera subsystem nodes

On Thu, Feb 01, 2024 at 01:42:13AM +0000, Changhuang Liang wrote:
> Hi, Conor
> 
> > On Tue, Jan 30, 2024 at 12:25:09AM -0800, Changhuang Liang wrote:
> > > Add camera subsystem nodes for the StarFive JH7110 SoC. They contain
> > > the imx219, dphy-rx, csi2rx, camss nodes.
> > >
> > > Signed-off-by: Changhuang Liang <changhuang.liang@...rfivetech.com>
> > > ---
> > >  .../jh7110-starfive-visionfive-2.dtsi         | 103
> > ++++++++++++++++++
> > >  arch/riscv/boot/dts/starfive/jh7110.dtsi      |  67 ++++++++++++
> > >  2 files changed, 170 insertions(+)
> > >
> > > diff --git
> > > a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> > > b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> > > index b89e9791efa7..e0027bb379ef 100644
> > > --- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> > > +++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
> > > @@ -30,6 +30,37 @@ cpus {
> > >  		timebase-frequency = <4000000>;
> > >  	};
> > >
> > > +	imx219_clk: imx219-clock {
> > > +		compatible = "fixed-clock";
> > > +		clock-output-names = "imx219_clk";
> > > +		clock-frequency = <24000000>;
> > > +		#clock-cells = <0>;
> > > +	};
> > 
> > Why do you need an output name here?
> 
> The output name can be unnecessary. 
> 
> > Also, where does this clock come from? Is it an oscillator on the board?
> > 
> 
> This clock come from imx219, not the VisionFive 2 board.

If the camera is not on the visionfive 2 board, why are you adding this
to visionfive-2.dtsi?

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