1*c66ec88fSEmmanuel VadotOLPC XO-1.75 Embedded Controller 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotRequired properties: 4*c66ec88fSEmmanuel Vadot- compatible: Should be "olpc,xo1.75-ec". 5*c66ec88fSEmmanuel Vadot- cmd-gpios: gpio specifier of the CMD pin 6*c66ec88fSEmmanuel Vadot 7*c66ec88fSEmmanuel VadotThe embedded controller requires the SPI controller driver to signal readiness 8*c66ec88fSEmmanuel Vadotto receive a transfer (that is, when TX FIFO contains the response data) by 9*c66ec88fSEmmanuel Vadotstrobing the ACK pin with the ready signal. See the "ready-gpios" property of the 10*c66ec88fSEmmanuel VadotSSP binding as documented in: 11*c66ec88fSEmmanuel Vadot<Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml>. 12*c66ec88fSEmmanuel Vadot 13*c66ec88fSEmmanuel VadotExample: 14*c66ec88fSEmmanuel Vadot &ssp3 { 15*c66ec88fSEmmanuel Vadot spi-slave; 16*c66ec88fSEmmanuel Vadot ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>; 17*c66ec88fSEmmanuel Vadot 18*c66ec88fSEmmanuel Vadot slave { 19*c66ec88fSEmmanuel Vadot compatible = "olpc,xo1.75-ec"; 20*c66ec88fSEmmanuel Vadot spi-cpha; 21*c66ec88fSEmmanuel Vadot cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>; 22*c66ec88fSEmmanuel Vadot }; 23*c66ec88fSEmmanuel Vadot }; 24