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I built a poky build based on yocto kirkstone and the version I have it running is Linux beaglebone-yocto 5.15.54-rt48-yocto-standard #1 PREEMPT Thu Jul 14 18:52:26 UTC 2022 armv7l armv7l armv7l GNU/Linux

Also, while building I have a custom layer with a bbappend layer which patches the kernel with a PREEMPT RT patch and adds the following to the kernel configs

CONFIG_USB_ETH=y
CONFIG_USB_G_NCM=m
CONFIG_USB_MASS_STORAGE=y

CONFIG_GPIO_SYSFS=y
CONFIG_GPIO_AGGREGATOR=y
CONFIG_GPIO_VIRTIO=y

As you can see I've enabled GPIO_SYSFS, but when I try to access GPIO pins via /sys/class/gpio there is not gpio directory in /sys/class.

Not sure what is wrong and this is my first time using yocto linux, any help is appreciated.

Thanks

Pavan Kumar
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1 Answers1

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You need to add "CONFIG_EXPERT=y"

Like this:

CONFIG_EXPERT=y
CONFIG_GPIO_SYSFS=y
stefangaleksandrov
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