| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | }; |