[PATCH v4 8/9] arm64: dts: qcom: kodiak: Describe EUD UTMI path using child node

Elson Serrao
2026-05-01T17:06:47Z

The existing EUD description uses a legacy single-path representation
that assumes uniform UTMI routing. This was sufficient for minimal
configurations where the USB port operated only in device mode and role
switching was not considered.

Update the description to explicitly model the topology using eud path
child node and add a role-switch declaration to reflect role-dependent
UTMI routing. Also on this SoC, the EUD hardware intercepts only the
primary UTMI path. So remove the USB endpoint mapping to the secondary
controller and associate it with the primary controller.

With the UTMI path now accurately described, enable the EUD by default.
The connector side of the path is left unspecified, allowing board-level
DTS files to describe the physical connector mapping.

Signed-off-by: Elson Serrao <elson.serrao@oss.qualcomm.com>
---
arch/arm64/boot/dts/qcom/kodiak.dtsi | 35 +++++++++++++++++-----------
1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/kodiak.dtsi b/arch/arm64/boot/dts/qcom/kodiak.dtsi
index 988ca5f7c8a0..cad1d78f9e62 100644
--- a/arch/arm64/boot/dts/qcom/kodiak.dtsi
+++ b/arch/arm64/boot/dts/qcom/kodiak.dtsi
@@ -4400,12 +4400,6 @@ usb_2: usb@8c00000 {
phy-names = "usb2-phy";
maximum-speed = "high-speed";
usb-role-switch;
-
- port {
- usb2_role_switch: endpoint {
- remote-endpoint = <&eud_ep>;
- };
- };
};

qspi: spi@88dc000 {
@@ -4729,16 +4723,28 @@ eud: eud@88e0000 {
<0 0x88e2000 0 0x1000>;
interrupts-extended = <&pdc 11 IRQ_TYPE_LEVEL_HIGH>;

- status = "disabled";
+ #address-cells = <1>;
+ #size-cells = <0>;

- ports {
- #address-cells = <1>;
- #size-cells = <0>;
+ eud0: eud-path@0 {
+ reg = <0>;
+ usb-role-switch;

- port@0 {
- reg = <0>;
- eud_ep: endpoint {
- remote-endpoint = <&usb2_role_switch>;
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ eud_usb: endpoint {
+ remote-endpoint = <&usb_1_dwc3_hs>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ eud_con: endpoint {
+ };
};
};
};
@@ -4965,6 +4971,7 @@ port@0 {
reg = <0>;

usb_1_dwc3_hs: endpoint {
+ remote-endpoint = <&eud_usb>;
};
};

--
2.34.1