1*4882a593Smuzhiyun# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2*4882a593Smuzhiyun%YAML 1.2 3*4882a593Smuzhiyun--- 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun$id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml# 6*4882a593Smuzhiyun$schema: http://devicetree.org/meta-schemas/core.yaml# 7*4882a593Smuzhiyun 8*4882a593Smuzhiyuntitle: I2C bus that tunnels through the ChromeOS EC (cros-ec) 9*4882a593Smuzhiyun 10*4882a593Smuzhiyunmaintainers: 11*4882a593Smuzhiyun - Doug Anderson <dianders@chromium.org> 12*4882a593Smuzhiyun - Benson Leung <bleung@chromium.org> 13*4882a593Smuzhiyun - Enric Balletbo i Serra <enric.balletbo@collabora.com> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyundescription: | 16*4882a593Smuzhiyun On some ChromeOS board designs we've got a connection to the EC 17*4882a593Smuzhiyun (embedded controller) but no direct connection to some devices on the 18*4882a593Smuzhiyun other side of the EC (like a battery and PMIC). To get access to 19*4882a593Smuzhiyun those devices we need to tunnel our i2c commands through the EC. 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun The node for this device should be under a cros-ec node like 22*4882a593Smuzhiyun google,cros-ec-spi or google,cros-ec-i2c. 23*4882a593Smuzhiyun 24*4882a593SmuzhiyunallOf: 25*4882a593Smuzhiyun - $ref: i2c-controller.yaml# 26*4882a593Smuzhiyun 27*4882a593Smuzhiyunproperties: 28*4882a593Smuzhiyun compatible: 29*4882a593Smuzhiyun const: google,cros-ec-i2c-tunnel 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun google,remote-bus: 32*4882a593Smuzhiyun description: The EC bus we'd like to talk to. 33*4882a593Smuzhiyun $ref: /schemas/types.yaml#/definitions/uint32 34*4882a593Smuzhiyun 35*4882a593Smuzhiyunrequired: 36*4882a593Smuzhiyun - compatible 37*4882a593Smuzhiyun - google,remote-bus 38*4882a593Smuzhiyun 39*4882a593SmuzhiyununevaluatedProperties: false 40*4882a593Smuzhiyun 41*4882a593Smuzhiyunexamples: 42*4882a593Smuzhiyun - | 43*4882a593Smuzhiyun spi0 { 44*4882a593Smuzhiyun #address-cells = <1>; 45*4882a593Smuzhiyun #size-cells = <0>; 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun cros-ec@0 { 48*4882a593Smuzhiyun compatible = "google,cros-ec-spi"; 49*4882a593Smuzhiyun reg = <0>; 50*4882a593Smuzhiyun spi-max-frequency = <5000000>; 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun i2c-tunnel { 53*4882a593Smuzhiyun compatible = "google,cros-ec-i2c-tunnel"; 54*4882a593Smuzhiyun #address-cells = <1>; 55*4882a593Smuzhiyun #size-cells = <0>; 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun google,remote-bus = <0>; 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun battery: sbs-battery@b { 60*4882a593Smuzhiyun compatible = "sbs,sbs-battery"; 61*4882a593Smuzhiyun reg = <0xb>; 62*4882a593Smuzhiyun sbs,poll-retry-count = <1>; 63*4882a593Smuzhiyun }; 64*4882a593Smuzhiyun }; 65*4882a593Smuzhiyun }; 66*4882a593Smuzhiyun }; 67