USB gadget regression on i.MX7

[Fabio Estevam]

Hi Marek,

I noticed that USB  gadget does not work in U-Boot mainline on a warp7 board:

=> ums 0 mmc 0
UMS: LUN 0, dev mmc 0, hwpart 0, sector 0x0, count 0xe18000
g_dnl_register: failed!, error: -2
g_dnl_register failed

2021.04 works fine. I bisected and it pointed to:

4dcfa3bcbcbc5e0f7da145fff41e120392433062 is the first bad commit
commit 4dcfa3bcbcbc5e0f7da145fff41e120392433062
Author: Marek Vasut <marex at denx.de>
Date:   Wed Mar 31 23:06:07 2021 +0200

    usb: ehci-mx6: Parse USB PHY and MISC offsets from DT

    In case DM and OF controler is enabled, but PHY support is disabled,
    parse USB PHY and MISC component addresses from DT manually. Those
    component addresses will be used in subsequent patches to access the
    ANATOP, PHY and MISC registers matching the controller and thus get
    rid of the ad-hoc controller sequence number mapping.

    Fixes: 4de51cc25b5 ("usb: ehci-mx6: Drop assignment of sequence number")
    Signed-off-by: Marek Vasut <marex at denx.de>
    Cc: Fabio Estevam <festevam at gmail.com>
    Cc: Peng Fan <peng.fan at nxp.com>
    Cc: Stefano Babic <sbabic at denx.de>
    Cc: Ye Li <ye.li at nxp.com>
    Cc: uboot-imx <uboot-imx at nxp.com>

fdtdec_get_alias_seq() fails inside mx6_parse_dt_addrs().

Any suggestions?

Thanks,

Fabio Estevam