linux-kernel - Re: [PATCH v3 10/12] arm64: dts: imx8qm: add 24MHz clock-xtal24m

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Message-ID: <20250327185813.GA22659@pendragon.ideasonboard.com>
Date: Thu, 27 Mar 2025 20:58:13 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Frank Li <Frank.Li@....com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Dong Aisheng <aisheng.dong@....com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rui Miguel Silva <rmfrfs@...il.com>,
	Martin Kepplinger <martink@...teo.de>,
	Purism Kernel Team <kernel@...i.sm>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
	Robert Chiras <robert.chiras@....com>,
	"Guoniu.zhou" <guoniu.zhou@....com>
Subject: Re: [PATCH v3 10/12] arm64: dts: imx8qm: add 24MHz clock-xtal24m

Hi Frank,

Thank you for the patch.

On Mon, Feb 10, 2025 at 03:59:29PM -0500, Frank Li wrote:
> Add fixed clock node clock-xtal24m to prepare to add camera support.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> change from v1 to v3
> - none
> ---
>  arch/arm64/boot/dts/freescale/imx8qm.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8qm.dtsi b/arch/arm64/boot/dts/freescale/imx8qm.dtsi
> index c6a17a0d739c5..40cd45cd9f88f 100644
> --- a/arch/arm64/boot/dts/freescale/imx8qm.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8qm.dtsi
> @@ -590,6 +590,13 @@ mipi_pll_div2_clk: clock-controller-mipi-div2-pll {
>  		clock-output-names = "mipi_pll_div2_clk";
>  	};
>  
> +	xtal24m: clock-xtal24m {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <24000000>;
> +		clock-output-names = "xtal_24MHz";
> +	};

This is a clock oscillator mounted on the PCB, isn't it ? It shouldn't
be in imx8qm.dtsi, but in board-specific DT sources.

> +
>  	vpu_subsys_dsp: bus@...00000 {
>  		compatible = "simple-bus";
>  		#address-cells = <1>;

-- 
Regards,

Laurent Pinchart