kernel/Documentation/devicetree/bindings/spi/omap-spi.txt
.. .. @@ -2,6 +2,7 @@ 2 2 3 3 Required properties: 4 4 - compatible : 5 + - "ti,am654-mcspi" for AM654.5 6 - "ti,omap2-mcspi" for OMAP2 & OMAP3. 6 7 - "ti,omap4-mcspi" for OMAP4+. 7 8 - ti,spi-num-cs : Number of chipselect supported by the instance.