Hi,
Error output "*Command 'gpio' failed: Error -19*" is occurring with "*gpio status -a*" command on Beaglebone Black.
The "gpio" command is proper till "U-Boot 2021.04-rc2". Error message is noticed from subsequent releases on-wards.
Problem is noticed on u-boot versions from *U-Boot 2021.04-rc3 to U-Boot 2021.07-rc1* The same command is OK on "sandbox" and "rpi 0 wireless" .
Not sure if the maintenance of code for old boards such as Beaglebone Black is still actively persuaded.Trying to report the observations
------------------------------------------------------------------ Code/Output : ------------------------------------------------------------------- U-Boot SPL 2021.07-rc1-00179-g8ddaf94358 (May 03 2021 - 15:36:38 +0530) Trying to boot from MMC1
U-Boot 2021.07-rc1-00179-g8ddaf94358 (May 03 2021 - 15:36:38 +0530)
CPU : AM335X-GP rev 2.1 Model: TI AM335x BeagleBone Black DRAM: 512 MiB WDT: Started with servicing (60s timeout) NAND: 0 MiB MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 Loading Environment from FAT... Unable to read "uboot.env" from mmc0:1... <ethaddr> not set. Validating first E-fuse MAC Net: eth2: ethernet@4a100000, eth3: usb_ether Hit any key to stop autoboot: 0 => gpio status -a Command 'gpio' failed: Error -19 => ------------------------------------------------------------------- Regards, Adarsh