| 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 | $id: http://devicetree.org/schemas/slimbus/slimbus.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: SLIM (Serial Low Power Interchip Media) bus |
| 8 | |
| 9 | maintainers: |
| 10 | - Srinivas Kandagatla <srinivas.kandagatla@linaro.org> |
| 11 | |
| 12 | description: |
| 13 | SLIMbus is a 2-wire bus, and is used to communicate with peripheral |
| 14 | components like audio-codec. |
| 15 | |
| 16 | properties: |
| 17 | $nodename: |
| 18 | pattern: "^slim(@.*|-([0-9]|[1-9][0-9]+))?$" |
| 19 | |
| 20 | "#address-cells": |
| 21 | const: 2 |
| 22 | |
| 23 | "#size-cells": |
| 24 | const: 0 |
| 25 | |
| 26 | patternProperties: |
| 27 | "^.*@[0-9a-f]+,[0-9a-f]+$": |
| 28 | type: object |
| 29 | description: | |
| 30 | Every SLIMbus controller node can contain zero or more child nodes |
| 31 | representing slave devices on the bus. Every SLIMbus slave device is |
| 32 | uniquely determined by the enumeration address containing 4 fields:: |
| 33 | Manufacturer ID, Product code, Device index, and Instance value for the |
| 34 | device. |
| 35 | |
| 36 | If child node is not present and it is instantiated after device |
| 37 | discovery (slave device reporting itself present). |
| 38 | |
| 39 | In some cases it may be necessary to describe non-probeable device |
| 40 | details such as non-standard ways of powering up a device. In such cases, |
| 41 | child nodes for those devices will be present as slaves of the SLIMbus |
| 42 | controller. |
| 43 | |
| 44 | properties: |
| 45 | compatible: |
| 46 | pattern: "^slim[0-9a-f]+,[0-9a-f]+$" |
| 47 | |
| 48 | reg: |
| 49 | maxItems: 1 |
| 50 | description: | |
| 51 | Pair of (device index, instande ID), where:: |
| 52 | - Device index, which uniquely identifies multiple devices within a |
| 53 | single component. |
| 54 | - Instance ID, can be used for the cases where multiple devices of |
| 55 | the same type or class are attached to the bus. |
| 56 | |
| 57 | required: |
| 58 | - compatible |
| 59 | - reg |
| 60 | |
| 61 | additionalProperties: true |
| 62 | |
| 63 | required: |
| 64 | - "#address-cells" |
| 65 | - "#size-cells" |
| 66 | |
| 67 | additionalProperties: true |
| 68 | |
| 69 | examples: |
| 70 | - | |
| 71 | #include <dt-bindings/clock/qcom,gcc-msm8960.h> |
| 72 | #include <dt-bindings/clock/qcom,lcc-msm8960.h> |
| 73 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 74 | |
| 75 | soc { |
| 76 | #address-cells = <1>; |
| 77 | #size-cells = <1>; |
| 78 | ranges; |
| 79 | |
| 80 | slim@28080000 { |
| 81 | compatible = "qcom,apq8064-slim", "qcom,slim"; |
| 82 | reg = <0x28080000 0x2000>, <0x80207c 4>; |
| 83 | reg-names = "ctrl", "slew"; |
| 84 | interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>; |
| 85 | clocks = <&lcc SLIMBUS_SRC>, <&lcc AUDIO_SLIMBUS_CLK>; |
| 86 | clock-names = "iface", "core"; |
| 87 | #address-cells = <2>; |
| 88 | #size-cells = <0>; |
| 89 | |
| 90 | audio-codec@1,0 { |
| 91 | compatible = "slim217,60"; |
| 92 | reg = <1 0>; |
| 93 | }; |
| 94 | }; |
| 95 | }; |