From: Chen-Yu Tsai <wens@csie.org>
Date: Mon, 27 Apr 2020 06:52:54 +0000 (+0800)
Subject: rockchip: dts: rock64: Fix XHCI usage
X-Git-Tag: v2020.07-rc2~17^2~7
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=062baa25661ed30af10e16fe9d147bb2300b15bd;p=oweals%2Fu-boot.git

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>
---

diff --git a/arch/arm/dts/rk3328-rock64-u-boot.dtsi b/arch/arm/dts/rk3328-rock64-u-boot.dtsi
index e5946d2d2d..8318bf4e60 100644
--- a/arch/arm/dts/rk3328-rock64-u-boot.dtsi
+++ b/arch/arm/dts/rk3328-rock64-u-boot.dtsi
@@ -12,5 +12,16 @@
 };
 
 &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;
+};