Bindings/i2c/google,cros-ec-i2c-tunnel.yaml

   1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4
   5 $id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#
   6 $schema: http://devicetree.org/meta-schemas/core.yaml#
   7
   8 title: I2C bus that tunnels through the ChromeOS EC (cros-ec)
   9
  10 maintainers:
  11   - Doug Anderson <dianders@chromium.org>
  12   - Benson Leung <bleung@chromium.org>
  13
  14 description: |
  15   On some ChromeOS board designs we've got a connection to the EC
  16   (embedded controller) but no direct connection to some devices on the
  17   other side of the EC (like a battery and PMIC).  To get access to
  18   those devices we need to tunnel our i2c commands through the EC.
  19
  20   The node for this device should be under a cros-ec node like
  21   google,cros-ec-spi or google,cros-ec-i2c.
  22
  23 allOf:
  24   - $ref: i2c-controller.yaml#
  25
  26 properties:
  27   compatible:
  28     const: google,cros-ec-i2c-tunnel
  29
  30   google,remote-bus:
  31     description: The EC bus we'd like to talk to.
  32     $ref: /schemas/types.yaml#/definitions/uint32
  33
  34 required:
  35   - compatible
  36   - google,remote-bus
  37
  38 unevaluatedProperties: false
  39
  40 examples:
  41   - |
  42     spi {
  43         #address-cells = <1>;
  44         #size-cells = <0>;
  45
  46         cros-ec@0 {
  47             compatible = "google,cros-ec-spi";
  48             reg = <0>;
  49             spi-max-frequency = <5000000>;
  50             interrupts = <99 0>;
  51
  52             i2c-tunnel {
  53                 compatible = "google,cros-ec-i2c-tunnel";
  54                 #address-cells = <1>;
  55                 #size-cells = <0>;
  56
  57                 google,remote-bus = <0>;
  58
  59                 battery: sbs-battery@b {
  60                     compatible = "sbs,sbs-battery";
  61                     reg = <0xb>;
  62                     sbs,poll-retry-count = <1>;
  63                 };
  64             };
  65         };
  66     };