linux-kernel - Re: [PATCH v2 6/9] arm64: dts: lx2160a-rdb: describe the QIXIS FPGA and two child GPIO controllers

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Message-ID: <aMmS/Bfc6hQLgpDQ@lizhi-Precision-Tower-5810>
Date: Tue, 16 Sep 2025 12:40:28 -0400
From: Frank Li <Frank.li@....com>
To: Ioana Ciornei <ioana.ciornei@....com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Shawn Guo <shawnguo@...nel.org>, Michael Walle <mwalle@...nel.org>,
	Lee Jones <lee@...nel.org>, devicetree@...r.kernel.org,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/9] arm64: dts: lx2160a-rdb: describe the QIXIS FPGA
 and two child GPIO controllers

On Mon, Sep 15, 2025 at 03:23:51PM +0300, Ioana Ciornei wrote:
> Describe the FPGA present on the LX2160ARDB board as a simple-mfd I2C
> device. The FPGA presents registers that deal with power-on-reset
> timing, muxing, SFP cage monitoring and control etc.
>
> Also add the two GPIO controllers responsible for monitoring and
> controlling the SFP+ cages used for MAC5 and MAC6.
>
> Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>

Reviewed-by: Frank Li <Frank.Li@....com>

> ---
> Changes in v2:
> - Use the same compatible string for both GPIO controller nodes.
>
>  .../boot/dts/freescale/fsl-lx2160a-rdb.dts    | 31 +++++++++++++++++++
>  1 file changed, 31 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
> index 0c44b3cbef77..4ede1295f29d 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
> @@ -170,6 +170,37 @@ mt35xu512aba1: flash@1 {
>  &i2c0 {
>  	status = "okay";
>
> +	cpld@66 {
> +		compatible = "fsl,lx2160ardb-fpga";
> +		reg = <0x66>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		sfp2_csr: gpio@19 {
> +			compatible = "fsl,lx2160ardb-fpga-gpio-sfp";
> +			reg = <0x19>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			gpio-line-names =
> +				"SFP2_TX_EN", "",
> +				"", "",
> +				"SFP2_RX_LOS", "SFP2_TX_FAULT",
> +				"", "SFP2_MOD_ABS";
> +		};
> +
> +		sfp3_csr: gpio@1a {
> +			compatible = "fsl,lx2160ardb-fpga-gpio-sfp";
> +			reg = <0x1a>;
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +			gpio-line-names =
> +				"SFP3_TX_EN", "",
> +				"", "",
> +				"SFP3_RX_LOS", "SFP3_TX_FAULT",
> +				"", "SFP3_MOD_ABS";
> +		};
> +	};
> +
>  	i2c-mux@77 {
>  		compatible = "nxp,pca9547";
>  		reg = <0x77>;
> --
> 2.25.1
>