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NanoPi Neo Air 4.x Kernel: Any way to provide 2x SPI CS?

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I'm actually designing a system based on the NanoPi Neo Air and am quite happy with the performance of this little board.

However I now ran into a problem with my SPI bus. I need to communicate with two devices and I'm wondering if there is a easy way to use a second chip select pin for it?

Does anybody got a solution for it?

Thanks and happy new year! :)
Nobody any idea?

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