AM6442: Enabling kernel CONFIG_GPIO_SYSFS config in AM64 Linux SDK

Abdelaziz Belhareth

Part Number: AM6442

Hi TI experts,

I’m working on AM64-EVM and trying to enable CONFIG_GPIO_SYSFS in the Linux SDK v11.01.05.03.

I'm aware that the sysfs GPIO interface is deprecated, but I still need to use it temporarily for backward-compatibility purposes.

So far, I have added "CONFIG_GPIO_SYSFS=y" to "arch/arm64/configs/defconfig". However, after rebuilding, I don’t see this option enabled in the generated .config file (however adding some other config works fine).

It looks like something in the build system might be filtering it out, or the option may be gated behind another Kconfig symbol.

Could you please clarify whether CONFIG_GPIO_SYSFS is intentionally disabled or pruned in the AM64 Linux SDK?If there is a recommended way to force-enable it despite its deprecated status?Whether additional Kconfig dependencies must be set for this option to appear?

Any guidance would be appreciated.

7 months ago

+1 Shriya Surti 7 months ago

TI__Intellectual 2010 points

Hi Abdelaziz,

Since sysfs is deprecated, it has been intentionally disabled. I see that you are manually enabling the Kconfig symbol in the defconfig, however, the sysfs GPIO interface has dependencies beyond just enabling CONFIG_GPIO_SYSFS. Some of these dependencies, such as CONFIG_EXPERT and GPIO_CDEV, may not be enabled by default. Have you tried reconfiguring the kernel using make menuconfig to ensure all required options are visible and can be enabled?

Regards,

Shriya

0 Abdelaziz Belhareth 7 months ago

Prodigy 140 points

Hi Shriya,

CONFIG_EXPERT was missing.

Thank you

0 Shriya Surti 7 months ago in reply to Abdelaziz Belhareth

TI__Intellectual 2010 points

No problem.

Shriya

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AM6442: Enabling kernel CONFIG_GPIO_SYSFS config in AM64 Linux SDK