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33 lines
1.1 KiB
Diff
33 lines
1.1 KiB
Diff
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From e12f67fe83446432ef16704c22ec23bd1dbcd094 Mon Sep 17 00:00:00 2001
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From: Vicente Bergas <vicencb@gmail.com>
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Date: Tue, 1 Dec 2020 16:41:32 +0100
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Subject: arm64: dts: rockchip: use USB host by default on rk3399-rock-pi-4
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Based on the board schematics at
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https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi_4c_v12_sch_20200620.pdf
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on page 19 there is an USB Type-A receptacle being used as an USB-OTG port.
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But the Type-A connector is not valid for OTG operation, for this reason
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there is a switch to select host or device role.
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This is non-compliant and error prone because switching is manual.
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So, use host mode as it corresponds for a Type-A receptacle.
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Signed-off-by: Vicente Bergas <vicencb@gmail.com>
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Link: https://lore.kernel.org/r/20201201154132.1286-4-vicencb@gmail.com
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Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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---
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arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dts | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
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+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
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@@ -680,7 +680,7 @@
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&usbdrd_dwc3_0 {
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status = "okay";
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- dr_mode = "otg";
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+ dr_mode = "host";
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};
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&usbdrd3_1 {
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