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From e12f67fe83446432ef16704c22ec23bd1dbcd094 Mon Sep 17 00:00:00 2001
From: Vicente Bergas <vicencb@gmail.com>
Date: Tue, 1 Dec 2020 16:41:32 +0100
Subject: 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 <vicencb@gmail.com>
Link: https://lore.kernel.org/r/20201201154132.1286-4-vicencb@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
@@ -679,7 +679,7 @@
&usbdrd_dwc3_0 {
status = "okay";
- dr_mode = "otg";
+ dr_mode = "host";
};
&usbdrd3_1 {
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