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 - Enric Balletbo i Serra <enric.balletbo@collabora.com>
13 14
14 description: | 15 description: |
15 On some ChromeOS board designs we've got a c 16 On some ChromeOS board designs we've got a connection to the EC
16 (embedded controller) but no direct connecti 17 (embedded controller) but no direct connection to some devices on the
17 other side of the EC (like a battery and PMI 18 other side of the EC (like a battery and PMIC). To get access to
18 those devices we need to tunnel our i2c comm 19 those devices we need to tunnel our i2c commands through the EC.
19 20
20 The node for this device should be under a c 21 The node for this device should be under a cros-ec node like
21 google,cros-ec-spi or google,cros-ec-i2c. 22 google,cros-ec-spi or google,cros-ec-i2c.
22 23
23 allOf: 24 allOf:
24 - $ref: /schemas/i2c/i2c-controller.yaml# 25 - $ref: /schemas/i2c/i2c-controller.yaml#
25 26
26 properties: 27 properties:
27 compatible: 28 compatible:
28 const: google,cros-ec-i2c-tunnel 29 const: google,cros-ec-i2c-tunnel
29 30
30 google,remote-bus: 31 google,remote-bus:
31 description: The EC bus we'd like to talk 32 description: The EC bus we'd like to talk to.
32 $ref: /schemas/types.yaml#/definitions/uin 33 $ref: /schemas/types.yaml#/definitions/uint32
33 34
34 required: 35 required:
35 - compatible 36 - compatible
36 - google,remote-bus 37 - google,remote-bus
37 38
38 unevaluatedProperties: false 39 unevaluatedProperties: false
39 40
40 examples: 41 examples:
41 - | 42 - |
42 spi { !! 43 spi0 {
43 #address-cells = <1>; 44 #address-cells = <1>;
44 #size-cells = <0>; 45 #size-cells = <0>;
45 46
46 cros-ec@0 { 47 cros-ec@0 {
47 compatible = "google,cros-ec-spi"; 48 compatible = "google,cros-ec-spi";
48 reg = <0>; 49 reg = <0>;
49 spi-max-frequency = <5000000>; 50 spi-max-frequency = <5000000>;
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 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.