linux-kernel - Aw: Re: [PATCH 0/2] Add MUSB for MT7623

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Date:   Wed, 4 Aug 2021 13:33:16 +0200
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Sungbo Eo <mans0n@...ani.run>, Min Guo <min.guo@...iatek.com>
Cc:     linux-mediatek@...ts.infradead.org,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        devicetree@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Aw: Re:  [PATCH 0/2] Add MUSB for MT7623

Hi,

another strange thing is, after some bootups (i boot kernel from tftp, but also on full power cycle),
musb-driver maps musb-hdrc.4.auto instead of #1

root@...-r2:~# dmesg | grep musb
[    5.502914] musb-hdrc musb-hdrc.4.auto: MUSB HDRC host driver
[    5.508782] musb-hdrc musb-hdrc.4.auto: new USB bus registered, assigned bus number 5

and then nothing works (no roleswitch, no power which does not work with pinctl / without regulator).
It's hard to test if things working before, do no more work if device is named differently.

maybe Min Guo can help here?

after bootup mode is b_idle in my case (currently do not change if i connect otg cable)

root@...-r2:~# cat /sys/devices/platform/11200000.usb/musb-hdrc.4.auto/mode
b_idle

regards Frank