cmd:GPIO:TI: 'gpio' command Failure Error on Beaglebone Black

[Adarsh Babu Kalepalli]

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

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Code/Output :
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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 at 4a100000, eth3: usb_ether
Hit any key to stop autoboot:  0
=> gpio status -a
Command 'gpio' failed: Error -19
=>
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Regards,
Adarsh