Re: [PATCH v2 07/18] arm64: dts: ti: k3-j721e: Add overlay for fusion application daughter board

[Kumar, Udit]

Thanks for patch

On 7/13/2026 5:04 PM, Yemike Abhilash Chandra wrote:
> From: Vaishnav Achath <vaishnav.a@xxxxxx>
> 
> Fusion application daughter board [1] can be used to connect multiple
> FPDLink-III based sensors to TI EVMs. The board has two DS90UB960
> deserializers, each of which aggregates input from up to 4x FPDLink-III
> sensors. Up to 8x sensors can simultaneously stream over the two CSI RX
> ports on J721E.
J721E to same of board, please

> 
> [1]: https://svtronics.com/product/fusion-application-daughter-board-evm577pfusion-v1-0/?srsltid=AfmBOooMsRAd5ibFOGJaKbjsC3j9-loTPK2wWqsqPq2Adj55g1nPluxX
> 
> Signed-off-by: Vaishnav Achath <vaishnav.a@xxxxxx>
> Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra@xxxxxx>
> ---
> Changelog:
> Changes in v2:
> - Add missing bus-type property in csi2_phy0 endpoint for cdns_csi2rx0 (sashiko)
> - Fix minor DTS styling and whitespace inconsistencies in port definitions (sashiko)
> - Remove unused gpio.h header (sashiko)
> 
>  arch/arm64/boot/dts/ti/Makefile               |   4 +
> [..]
> +		deserializer_0_ports: ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +				status = "disabled";
> +			};
> +
> +			port@1 {
> +				reg = <1>;
> +				status = "disabled";
> +			};
> +
> +			port@2 {
> +				reg = <2>;
> +				status = "disabled";
> +			};
> +
> +			port@3 {
> +				reg = <3>;
> +				status = "disabled";
> +			};
> +
> +			/* CSI-2 TX */
> +			port@4 {
> +				reg = <4>;
> +				ds90ub960_0_csi_out: endpoint {
> +					data-lanes = <1 2 3 4>;
> +					clock-lanes = <0>;
> +					link-frequencies = /bits/ 64 <800000000>;
> +					remote-endpoint = <&csi2_phy0>;
> +				};
> +			};
> +
> +			port@5 {
> +				reg = <5>;
> +				status = "disabled";
> +			};

Little confused here on port number,
I am wondering, why 5 ports are defined.

as per DS90UB960, one single part can have 4 input (from sensors)
and 2 port output (towards SOC) page 5 from [0].



https://www.ti.com/lit/ds/symlink/ds90ub960-q1.pdf


> +		};
> +
> [..]