u-boot/arch/arm/dts/rk3328-rock64-u-boot.dtsi
Chen-Yu Tsai 062baa2566 rockchip: dts: rock64: Fix XHCI usage
If the VBUS regulator is always-on, XHCI will fail to detect USB 3.0
devices; USB 2.0 devices will work however.

Make the VBUS regulator controllable and tie it to only the XHCI. This
makes all three USB ports usable.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2020-05-01 18:32:56 +08:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2018-2019 Rockchip Electronics Co., Ltd
*/
#include "rk3328-u-boot.dtsi"
#include "rk3328-sdram-lpddr3-1600.dtsi"
/ {
chosen {
u-boot,spl-boot-order = "same-as-spl", &sdmmc, &emmc;
};
};
&usb_host0_xhci {
vbus-supply = <&vcc_host_5v>;
status = "okay";
};
/*
* This makes XHCI responsible for toggling VBUS. This is needed to work
* around an issue where either XHCI only works with USB 2.0 or OTG doesn't
* work, depending on how VBUS is configured. Having USB 3.0 seems better.
*/
&vcc_host_5v {
/delete-property/ regulator-always-on;
/delete-property/ regulator-boot-on;
};