Documentation/devicetree/bindings/misc/olpc,xo1.75-ec.txt

   1 OLPC XO-1.75 Embedded Controller
   2
   3 Required properties:
   4 - compatible: Should be "olpc,xo1.75-ec".
   5 - cmd-gpios: gpio specifier of the CMD pin
   6
   7 The embedded controller requires the SPI controller driver to signal readiness
   8 to receive a transfer (that is, when TX FIFO contains the response data) by
   9 strobing the ACK pin with the ready signal. See the "ready-gpios" property of the
  10 SSP binding as documented in:
  11 <Documentation/devicetree/bindings/spi/spi-pxa2xx.txt>.
  12
  13 Example:
  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         };