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OSPM will have to handle the above resources and select the pin function and configuration through vendor-specific interfaces (e.g: memory mapped registers) for the devices to be fully functional.

Design Document for Linux Kernel:

https://docs.google.com/document/d/1bgLAOEGmhVnxSF_Bx6-blg1_ZNnv8BTQGYW6gixOvjY/edit?usp=sharing

Status

• Implemented ACPI Pinctrl device in I.MX8MP platform

  • https://gitlab.com/LinaroLtd/clientpc/edk2-platforms/-/merge_requests/1

• Implemented Linux ACPI pinctrl extensions to support ACPI pin resources.

  • https://lore.kernel.org/linux-gpio/20221130164027.682898-1-niyas.sait@linaro.org/ ← In Upstream Review

• Added support for ACPI in I.MX pinctrl driver

  • https://gitlab.com/LinaroLtd/clientpc/linux/-/merge_requests/2/

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