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- I2C bus that tunnels through the ChromeOS EC (cros-ec)
- ======================================================
- On some ChromeOS board designs we've got a connection to the EC (embedded
- controller) but no direct connection to some devices on the other side of
- the EC (like a battery and PMIC). To get access to those devices we need
- to tunnel our i2c commands through the EC.
- The node for this device should be under a cros-ec node like google,cros-ec-spi
- or google,cros-ec-i2c.
- Required properties:
- - compatible: google,cros-ec-i2c-tunnel
- - google,remote-bus: The EC bus we'd like to talk to.
- Optional child nodes:
- - One node per I2C device connected to the tunnelled I2C bus.
- Example:
- cros-ec@0 {
- compatible = "google,cros-ec-spi";
- ...
- i2c-tunnel {
- compatible = "google,cros-ec-i2c-tunnel";
- #address-cells = <1>;
- #size-cells = <0>;
- google,remote-bus = <0>;
- battery: sbs-battery@b {
- compatible = "sbs,sbs-battery";
- reg = <0xb>;
- sbs,poll-retry-count = <1>;
- };
- };
- }
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