i.mx6 Failed to increase supply voltage: -110

[janexu]

Hi, When we insert the USB disk, we have the chance to meet the following error: FAT-fs (sdc1): FAT read failed (blocknr 4) usb 1-1: new high-speed USB device number 15 using ci_hdrc usb-storage 1-1:1.0: USB Mass Storage device detected scsi host3: usb-storage 1-1:1.0 fat__get_entry: 54 callbacks suppressed FAT-fs (sda1): Directory bread(block 480) failed FAT-fs (sda1): Directory bread(block 481) failed FAT-fs (sda1): Directory bread(block 482) failed FAT-fs (sda1): Directory bread(block 483) failed FAT-fs (sda1): Directory bread(block 484) failed FAT-fs (sda1): Directory bread(block 485) failed regulator regulator.5: Failed to increase supply voltage: -110 cpu cpu0: failed to scale vddpu up: -110 cpufreq: __target_index: Failed to change cpu frequency: -110 cpu cpu0: failed to scale vddpu up: -110 cpufreq: __target_index: Failed to change cpu frequency: -110 cpu cpu0: failed to scale vddpu up: -110 When error happened, no feedback when touch the touch screen, but the time in screen are changed. Thanks. Jane Xu

[igorpadykov]

Hi Jane

for "failed to increase supply voltage" issue one can check pmic and usb vbus circuit with oscilloscope,

like i.MX6Q Sabre SD schematic p.11 spf-27392, i.MX6_SABRE_SDP_DESIGNFILES

Design files, including hardware schematics, Gerbers, and OrCAD files

Best regards
igor

[janexu]

USB Vbus from the MIC2076 output. Checked the signal, it is normal when issue happened. What's the PMIC related? we not design the i.MX6 circuit but bought a core board.