arm64: dts: rockchip: use USB host by default on rk3399-rock-pi-4

Based on the board schematics at
https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi_4c_v12_sch_20200620.pdf
on page 19 there is an USB Type-A receptacle being used as an USB-OTG port.

But the Type-A connector is not valid for OTG operation, for this reason
there is a switch to select host or device role.
This is non-compliant and error prone because switching is manual.
So, use host mode as it corresponds for a Type-A receptacle.

Signed-off-by: Vicente Bergas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Heiko Stuebner <[email protected]>

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
index 63b029a543c1fffa84a74c7c79f59f9e82f67526..fb7599f07af4817feb36c216a2d9c1b00dff8d3c 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
@@ -673,7 +673,7 @@
 
 &usbdrd_dwc3_0 {
        status = "okay";
-       dr_mode = "otg";
+       dr_mode = "host";
 };
 
 &usbdrd3_1 {