1I2C bus that tunnels through the ChromeOS EC (cros-ec) 2====================================================== 3On some ChromeOS board designs we've got a connection to the EC (embedded 4controller) but no direct connection to some devices on the other side of 5the EC (like a battery and PMIC). To get access to those devices we need 6to tunnel our i2c commands through the EC. 7 8The node for this device should be under a cros-ec node like google,cros-ec-spi 9or google,cros-ec-i2c. 10 11 12Required properties: 13- compatible: google,cros-ec-i2c-tunnel 14- google,remote-bus: The EC bus we'd like to talk to. 15 16Optional child nodes: 17- One node per I2C device connected to the tunnelled I2C bus. 18 19 20Example: 21 cros-ec@0 { 22 compatible = "google,cros-ec-spi"; 23 24 ... 25 26 i2c-tunnel { 27 compatible = "google,cros-ec-i2c-tunnel"; 28 #address-cells = <1>; 29 #size-cells = <0>; 30 31 google,remote-bus = <0>; 32 33 battery: sbs-battery@b { 34 compatible = "sbs,sbs-battery"; 35 reg = <0xb>; 36 sbs,poll-retry-count = <1>; 37 }; 38 }; 39 } 40