From e09a2a34999893af027a5260288909e8bcfaed33 Mon Sep 17 00:00:00 2001
From: agluszyk <agluszyk@virtuslab.com>
Date: Thu, 6 Aug 2026 22:04:43 +0200
Subject: [PATCH] Permanently unbind unused USB1-3 host controllers at boot

USB host controllers 1/2/3 (ehci1-3/ohci1-3) are not physically wired
on the rg34xx-sp board - usbc1/2/3 in the devicetree carry
usb_host_init_state=1 and no drvvbus-supply regulator (only usbc0, the
real OTG/charging port, has one - see rg34xx-sp.dts), so nothing can
ever be attached to them.
---
 .../fsoverlay/etc/init.d/S29rg34xx-sp-usb     | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100755 board/allwinner/h700/fsoverlay/etc/init.d/S29rg34xx-sp-usb

diff --git a/board/allwinner/h700/fsoverlay/etc/init.d/S29rg34xx-sp-usb b/board/allwinner/h700/fsoverlay/etc/init.d/S29rg34xx-sp-usb
new file mode 100755
index 00000000..8c0edfd5
--- /dev/null
+++ b/board/allwinner/h700/fsoverlay/etc/init.d/S29rg34xx-sp-usb
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+if [ "$1" != "start" ]; then
+    exit 0
+fi
+
+# USB host controllers 1/2/3 (ehci1-3/ohci1-3) are not physically wired on
+# this board - usbc1/2/3 in the devicetree carry usb_host_init_state=1 and
+# no drvvbus-supply regulator (only usbc0, the real OTG/charging port, has
+# one - see rg34xx-sp.dts), so nothing can ever be attached to them.
+BOARD=$(cat /boot/boot/knulli.board)
+if [ "$BOARD" = "rg34xx-sp" ]; then
+    [ -e /sys/bus/platform/drivers/sunxi-ohci/5200000.ohci1-controller ] && echo 5200000.ohci1-controller > /sys/bus/platform/drivers/sunxi-ohci/unbind 2>/dev/null
+    [ -e /sys/bus/platform/drivers/sunxi-ehci/5200000.ehci1-controller ] && echo 5200000.ehci1-controller > /sys/bus/platform/drivers/sunxi-ehci/unbind 2>/dev/null
+    [ -e /sys/bus/platform/drivers/sunxi-ohci/5310000.ohci2-controller ] && echo 5310000.ohci2-controller > /sys/bus/platform/drivers/sunxi-ohci/unbind 2>/dev/null
+    [ -e /sys/bus/platform/drivers/sunxi-ehci/5310000.ehci2-controller ] && echo 5310000.ehci2-controller > /sys/bus/platform/drivers/sunxi-ehci/unbind 2>/dev/null
+    [ -e /sys/bus/platform/drivers/sunxi-ohci/5311000.ohci3-controller ] && echo 5311000.ohci3-controller > /sys/bus/platform/drivers/sunxi-ohci/unbind 2>/dev/null
+    [ -e /sys/bus/platform/drivers/sunxi-ehci/5311000.ehci3-controller ] && echo 5311000.ehci3-controller > /sys/bus/platform/drivers/sunxi-ehci/unbind 2>/dev/null
+fi