linux-kernel - Re: [Patch 5/9] arm: dts: dra72-evm-common: Add entries for the CSI2 cameras

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Date:   Tue, 22 Oct 2019 11:16:20 -0500
From:   Benoit Parrot <bparrot@...com>
To:     Tony Lindgren <tony@...mide.com>
CC:     Tero Kristo <t-kristo@...com>, Rob Herring <robh+dt@...nel.org>,
        <linux-omap@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [Patch 5/9] arm: dts: dra72-evm-common: Add entries for the CSI2
 cameras

Tony Lindgren <tony@...mide.com> wrote on Tue [2019-Oct-22 08:44:46 -0700]:
> * Benoit Parrot <bparrot@...com> [191018 15:46]:
> > Add device nodes for CSI2 camera board OV5640.
> > Add the CAL port nodes with the necessary linkage to the ov5640 nodes.
> > 
> > Signed-off-by: Benoit Parrot <bparrot@...com>
> > ---
> >  arch/arm/boot/dts/dra72-evm-common.dtsi | 35 +++++++++++++++++++++++++
> >  1 file changed, 35 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/dra72-evm-common.dtsi b/arch/arm/boot/dts/dra72-evm-common.dtsi
> > index 8641a3d7d8ad..e4c01a67f6de 100644
> > --- a/arch/arm/boot/dts/dra72-evm-common.dtsi
> > +++ b/arch/arm/boot/dts/dra72-evm-common.dtsi
> > @@ -187,6 +187,12 @@
> >  		gpio = <&gpio5 8 GPIO_ACTIVE_HIGH>;
> >  		enable-active-high;
> >  	};
> > +
> > +	clk_ov5640_fixed: clk_ov5640_fixed {
> > +		compatible = "fixed-clock";
> > +		#clock-cells = <0>;
> > +		clock-frequency = <24000000>;
> > +	};
> >  };
> 
> The clock node name should be generic and not use
> undescores. If there is a hidden dependency to the
> clock node name here, it should be mentioned in the
> patch for the non-standard use.

Not sure what you mean by generic, here.
This is just to provide a "clock" node which gives the "value" of the fixed
oscillator frequency so driver can get to it, the actual name does not
matter.

Benoit

> 
> Regards,
> 
> Tony