The youngest architecture addition to the mainline Linux kernel was C-Sky (arch/csky/).
I have a GX6605S board booting a downstream 4.9 kernel. It uses a proprietary GxLoader bootloader (similarities with U-Boot exist but no sources...) with uImage and gx6605s.dtb files in a FAT partition on USB stick.
I prepared a csky-elf GCC cross-toolchain and would like to try building and booting a mainline kernel on that board. This will involve writing a mainline-compatible .dts for this board that, if successful, I could contribute upstream.
Besides learning about this architecture and any commonalities and differences, I am curious whether I can use the 3 accessible GPIOs on the board for connecting any radio transceivers for testing my LoRa, FSK, etc. kernel network drivers. Too little for bit-banging SPI, I guess, and seemingly no pin-muxing to UART. Maybe some I²C sensor though?
This project is part of:
Hack Week 18
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