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OLPC XO-1.75 Embedded Controller
Required properties:
- compatible: Should be "olpc,xo1.75-ec".
- cmd-gpios: gpio specifier of the CMD pin
The embedded controller requires the SPI controller driver to signal readiness
to receive a transfer (that is, when TX FIFO contains the response data) by
strobing the ACK pin with the ready signal. See the "ready-gpios" property of the
SSP binding as documented in:
<Documentation/devicetree/bindings/spi/spi-pxa2xx.txt>.
Example:
&ssp3 {
spi-slave;
ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>;
slave {
compatible = "olpc,xo1.75-ec";
spi-cpha;
cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>;
};
};