On the iMX233, with ltib we have configured GPIO threough sys class support as detailed here <>
However creating/exporting the device fails with a BUSY error (status code 16).
for "echo 59 >>/sys/class/gpio/export" -- 59 is Bank 1 Pin 27 - for GPIO-PMW1.
Kernel dmesg reports status 16.
>>gpio_request: gpio-59 (sysfs) status -16
>>export_store: status -16
This has been seen in bot kernel/module space(as a .ko and via uImage).
Kindly provide pointers if the GPIO export via sysfs needs any additional configuration?.