On 12/6/20 3:56 PM, Patrick Menschel wrote:
>> dtoverlay=spi1-1cs,cs0_pin=18
> However this line is not be necessary.
> It sets up spidev for spi1.
> https://github.com/raspberrypi/linux/blob/rpi-5.4.y/arch/arm/boot/dts/overlays/spi1-1cs-overlay.dts#L34

Yes, but it configures the cs0 for spi1 in the first place.

> The next overlay removes spidev again.
> https://github.com/raspberrypi/linux/blob/rpi-5.4.y/arch/arm/boot/dts/overlays/mcp251xfd-overlay.dts#L35

ACK, but only the spidev.

Marc

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