1OLPC XO-1.75 Embedded Controller 2 3Required properties: 4- compatible: Should be "olpc,xo1.75-ec". 5- cmd-gpios: gpio specifier of the CMD pin 6 7The embedded controller requires the SPI controller driver to signal readiness 8to receive a transfer (that is, when TX FIFO contains the response data) by 9strobing the ACK pin with the ready signal. See the "ready-gpios" property of the 10SSP binding as documented in: 11<Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml>. 12 13Example: 14 &ssp3 { 15 spi-slave; 16 ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>; 17 18 slave { 19 compatible = "olpc,xo1.75-ec"; 20 spi-cpha; 21 cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>; 22 }; 23 }; 24