Hi,
On Fri, 2021-08-06 at 13:54 +0300, Matwey V. Kornilov wrote:
Hello,
I've found that the following commit breaks USB on BeagleBone Black board (am335x based):
commit 942853dd96df5de1c0a2a61c877c1cf1c24f1e91 Author: Paul Barker paul.barker@sancloud.com Date: Mon Jul 12 21:14:09 2021 +0100
arm: dts: Resync BeagleBone device treesWhen commit is applied then I see the following:
starting USB... No working controllers found USB is stopped. Please issue 'usb start' first. starting USB... No working controllers found
Before the commit USB was working as expected:
starting USB... Bus usb@47401800: scanning bus usb@47401800 for devices... 1 USB Device(s) found scanning usb for storage devices... 1 Storage Device(s) found
Device 0: Vendor: Rev: PMAP Prod: USB DISK Pro Type: Removable Hard Disk Capacity: 7381.2 MB = 7.2 GB (15116736 x 512) ... is now current device
It looks the the arch/arm/dts/am33xx.dtsi file is out of sync with Linux, leading to this regression. In the current U-Boot version, it has
status = "disabled";
lines for e.g. usb0 while in Linux mainline, those are missing. As the commit you found by bisecting drops the
status = "okay";
lines from arch/arm/dts/am335x-bone-common.dtsi, the device now are no longer enabled. Maybe try syncing am33xx.dtsi as well to check if it helps?