We designed our own Carrier Board to work with NANO Core Board. However, HDMI connector could not dispaly.
The debug message shows that
‘[0009.086] pmc_set_io_pad_voltage: Error -2 retrieving platform-io-pad-voltagepropsetting ‘avdd-io-hdmi-dp’ regulator to 1050000 micro volts
[0009.101] setting ‘vdd-1v8’ regulator to 1800000 micro volts
[0009.108] could not find regulator
[0009.111] could not find regulator
[0009.115] could not find regulator’
Can you help explain what this message mean?
One more question, we designed Carrier Board referring to NANO Core Board version B01, however we verfied with A02，so is there any difference with Core Board between A02 and B01?