1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-C 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 4
5 $id: http://devicetree.org/schemas/i2c/google, 5 $id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#
6 $schema: http://devicetree.org/meta-schemas/co 6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 7
8 title: I2C bus that tunnels through the Chrome 8 title: I2C bus that tunnels through the ChromeOS EC (cros-ec)
9 9
10 maintainers: 10 maintainers:
11 - Doug Anderson <dianders@chromium.org> 11 - Doug Anderson <dianders@chromium.org>
12 - Benson Leung <bleung@chromium.org> 12 - Benson Leung <bleung@chromium.org>
13 13
14 description: | 14 description: |
15 On some ChromeOS board designs we've got a c 15 On some ChromeOS board designs we've got a connection to the EC
16 (embedded controller) but no direct connecti 16 (embedded controller) but no direct connection to some devices on the
17 other side of the EC (like a battery and PMI 17 other side of the EC (like a battery and PMIC). To get access to
18 those devices we need to tunnel our i2c comm 18 those devices we need to tunnel our i2c commands through the EC.
19 19
20 The node for this device should be under a c 20 The node for this device should be under a cros-ec node like
21 google,cros-ec-spi or google,cros-ec-i2c. 21 google,cros-ec-spi or google,cros-ec-i2c.
22 22
23 allOf: 23 allOf:
24 - $ref: /schemas/i2c/i2c-controller.yaml# !! 24 - $ref: i2c-controller.yaml#
25 25
26 properties: 26 properties:
27 compatible: 27 compatible:
28 const: google,cros-ec-i2c-tunnel 28 const: google,cros-ec-i2c-tunnel
29 29
30 google,remote-bus: 30 google,remote-bus:
31 description: The EC bus we'd like to talk 31 description: The EC bus we'd like to talk to.
32 $ref: /schemas/types.yaml#/definitions/uin 32 $ref: /schemas/types.yaml#/definitions/uint32
33 33
34 required: 34 required:
35 - compatible 35 - compatible
36 - google,remote-bus 36 - google,remote-bus
37 37
38 unevaluatedProperties: false 38 unevaluatedProperties: false
39 39
40 examples: 40 examples:
41 - | 41 - |
42 spi { !! 42 spi0 {
43 #address-cells = <1>; 43 #address-cells = <1>;
44 #size-cells = <0>; 44 #size-cells = <0>;
45 45
46 cros-ec@0 { 46 cros-ec@0 {
47 compatible = "google,cros-ec-spi"; 47 compatible = "google,cros-ec-spi";
48 reg = <0>; 48 reg = <0>;
49 spi-max-frequency = <5000000>; 49 spi-max-frequency = <5000000>;
50 interrupts = <99 0>; 50 interrupts = <99 0>;
51 51
52 i2c-tunnel { 52 i2c-tunnel {
53 compatible = "google,cros-ec-i 53 compatible = "google,cros-ec-i2c-tunnel";
54 #address-cells = <1>; 54 #address-cells = <1>;
55 #size-cells = <0>; 55 #size-cells = <0>;
56 56
57 google,remote-bus = <0>; 57 google,remote-bus = <0>;
58 58
59 battery: sbs-battery@b { 59 battery: sbs-battery@b {
60 compatible = "sbs,sbs-batt 60 compatible = "sbs,sbs-battery";
61 reg = <0xb>; 61 reg = <0xb>;
62 sbs,poll-retry-count = <1> 62 sbs,poll-retry-count = <1>;
63 }; 63 };
64 }; 64 };
65 }; 65 };
66 }; 66 };
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