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

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Message-ID:
 <SHXPR01MB0671F4FA0292CDF3034FEE48F240A@SHXPR01MB0671.CHNPR01.prod.partner.outlook.cn>
Date: Sun, 4 Feb 2024 02:01:03 +0000
From: Changhuang Liang <changhuang.liang@...rfivetech.com>
To: Conor Dooley <conor@...nel.org>
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:
 回复: 回复: 回复: [v2] riscv: dts: starfive: jh7110: Add camera subsystem nodes


Hi, Conor,

[...]
> > > > > > +	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?
> >
> > It seems that I need to use dtso. Right?
> 
> Yes. FWIW, the same comments as applied for the sound card Walker tried to
> add applies here too, unless this ships with the boards:
> | I'm not against allowing in-tree overlays for
> | hats/capes/daughter-boards that come bundled with a board, but
> | accepting ones for a hat that someone decided to use theoretically has
> | no limit! The "someone" in this case might be a StarFive developer,
> | but it could be any random one of your customers next!
> https://lore.kernel.org/linux-riscv/20230510-riveter-ridden-3f056251e623@s
> pud/
> 
> I figure this is a similar case as that?

Yes, I will drop the IMX219 node in next version.