openwrt/target/linux/rockchip/patches-5.10/104-rockchip-use-USB-host-by-default-on-rk3399-rock-pi-4.patch
David Bauer 422b3e1993 rockchip: add Kernel 5.10 support
Remove all upstreamed patches and add the kernel configuration for
version 5.10.

The Rock Pi 4 was split in multiple versions. Add a DTS with the old
name in order to keep compatibility while having kernel 5.4 and 5.10 in
parallel. Switch to the Rock Pi 4A DTS once Kernel 5.4 support is
removed.

Tested-on: Nanoi R2S

Signed-off-by: David Bauer <mail@david-bauer.net>
2021-02-20 01:26:00 +01:00

33 lines
1.1 KiB
Diff

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
@@ -680,7 +680,7 @@
&usbdrd_dwc3_0 {
status = "okay";
- dr_mode = "otg";
+ dr_mode = "host";
};
&usbdrd3_1 {