linux-kernel - [PATCH v2] arm64: dts: imx8dxl-ss-conn: Disable USB3 nodes

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Message-Id: <20250623075440.36660-1-ada@thorsis.com>
Date: Mon, 23 Jun 2025 09:54:40 +0200
From: Alexander Dahl <ada@...rsis.com>
To: devicetree@...r.kernel.org
Cc: Frank Li <Frank.li@....com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	imx@...ts.linux.dev (open list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2] arm64: dts: imx8dxl-ss-conn: Disable USB3 nodes

The i.MX 8DualXLite/8SoloXLite has a different connectivity memory map
than the generic i.MX8 has.  One conflicting resource is usb, where the
imx8dxl has a second usb2 phy @5b110000, while the generic imx8 dtsi has
one usb2 phy and one usb3 phy, and the usb3otg @5b110000.  When
including both imx8dxl-ss-conn.dtsi and imx8-ss-conn.dtsi as done in
imx8dxl.dtsi this leads to a duplicate unit-address warning.

The usb3otg node was introduced after the initial imx8dxl support with
commit a8bd7f155126 ("arm64: dts: imx8qxp: add cadence usb3 support")
and since then leads to warnings like this (when built with W=2):

      DTC     arch/arm64/boot/dts/freescale/imx8dxl-evk.dtb
    …/arch/arm64/boot/dts/freescale/imx8-ss-conn.dtsi:148.24-182.4: Warning (unique_unit_address): /bus@...00000/usb@...10000: duplicate unit-address (also used in node /bus@...00000/usbphy@...10000)
    …/arch/arm64/boot/dts/freescale/imx8-ss-hsio.dtsi:52.23-81.4: Warning (unique_unit_address): /bus@...00000/pcie@...10000: duplicate unit-address (also used in node /bus@...00000/pcie-ep@...10000)
      also defined at …/arch/arm64/boot/dts/freescale/imx8dxl-ss-hsio.dtsi:41.23-50.4
      also defined at …/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts:645.8-653.3

After the change that usb related warning is gone:

      DTC     arch/arm64/boot/dts/freescale/imx8dxl-evk.dtb
    …/arch/arm64/boot/dts/freescale/imx8-ss-hsio.dtsi:52.23-81.4: Warning (unique_unit_address): /bus@...00000/pcie@...10000: duplicate unit-address (also used in node /bus@...00000/pcie-ep@...10000)
      also defined at …/arch/arm64/boot/dts/freescale/imx8dxl-ss-hsio.dtsi:41.23-50.4
      also defined at …/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts:645.8-653.3

Signed-off-by: Alexander Dahl <ada@...rsis.com>
---

Notes:
    v2:
    - reworded commit message (build on mainline with W=2)
    - rebased on v6.16-rc3
    
    v1:
    - Link: https://lore.kernel.org/linux-devicetree/20250610060756.8212-1-ada@thorsis.com/

 arch/arm64/boot/dts/freescale/imx8dxl-ss-conn.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8dxl-ss-conn.dtsi b/arch/arm64/boot/dts/freescale/imx8dxl-ss-conn.dtsi
index 9b114bed084b..a66ba6d0a8c0 100644
--- a/arch/arm64/boot/dts/freescale/imx8dxl-ss-conn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8dxl-ss-conn.dtsi
@@ -5,6 +5,8 @@
 
 /delete-node/ &enet1_lpcg;
 /delete-node/ &fec2;
+/delete-node/ &usbotg3;
+/delete-node/ &usb3_phy;
 
 / {
 	conn_enet0_root_clk: clock-conn-enet0-root {

base-commit: 86731a2a651e58953fc949573895f2fa6d456841
-- 
2.39.5