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- Chrome OS CROS_EC Binding
- ======================
- The device tree node which describes the operation of the CROS_EC interface
- is as follows:
- Required properties :
- - compatible = "google,cros-ec"
- Optional properties :
- - spi-max-frequency : Sets the maximum frequency (in Hz) for SPI bus
- operation
- - i2c-max-frequency : Sets the maximum frequency (in Hz) for I2C bus
- operation
- - ec-interrupt : Selects the EC interrupt, defined as a GPIO according
- to the platform
- - optimise-flash-write : Boolean property - if present then flash blocks
- containing all 0xff will not be written, since we assume that the EC
- uses that pattern for erased blocks
- The CROS_EC node should appear as a subnode of the interrupt that connects it
- to the EC (e.g. i2c, spi, lpc). The reg property (as usual) will indicate
- the unit address on that bus.
- Example
- =======
- spi@131b0000 {
- cros-ec@0 {
- reg = <0>;
- compatible = "google,cros-ec";
- spi-max-frequency = <5000000>;
- ec-interrupt = <&gpio 174 1>;
- optimise-flash-write;
- status = "disabled";
- };
- };
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