[U-Boot] A20-olinuxino-micro hangs in U-boot if powered from MINI-USB only.

Nikolai Zhubr
2018-12-23T22:04:04Z

Hi all,

I'm observing that the said A20-onlinuxino-micro board hangs in U-boot
in probing USB2 (see example below) in case it is powered by connecting
its mini-usb connector to a computer. The problem does not happen if 12V
power connector is also empoyed. (Note: the example attached below is
for RC1, but RC2 is no different)
I can't say if such problem was also present in previous version of
u-boot or not.

Thank you,

Regards,
Nikolai

U-Boot 2019.01-rc1 (Dec 13 2018 - 15:11:11 +0300) Allwinner Technology

CPU: Allwinner A20 (SUN7I)
Model: Olimex A20-Olinuxino Micro
I2C: ready
DRAM: 1 GiB
MMC: SUNXI SD/MMC: 0, SUNXI SD/MMC: 1
Loading Environment from FAT... MMC: no card present
In: serial
Out: serial
Err: serial
Net: eth0: ethernet at 1c50000
starting USB...
USB0: USB EHCI 1.00
USB1: USB OHCI 1.0
USB2: