| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/i2c/aspeed,i2c.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs |
| 8 | |
| 9 | maintainers: |
| 10 | - Rayn Chen <rayn_chen@aspeedtech.com> |
| 11 | |
| 12 | allOf: |
| 13 | - $ref: /schemas/i2c/i2c-controller.yaml# |
| 14 | |
| 15 | properties: |
| 16 | compatible: |
| 17 | enum: |
| 18 | - aspeed,ast2400-i2c-bus |
| 19 | - aspeed,ast2500-i2c-bus |
| 20 | - aspeed,ast2600-i2c-bus |
| 21 | |
| 22 | reg: |
| 23 | minItems: 1 |
| 24 | items: |
| 25 | - description: address offset and range of bus |
| 26 | - description: address offset and range of bus buffer |
| 27 | |
| 28 | interrupts: |
| 29 | maxItems: 1 |
| 30 | |
| 31 | clocks: |
| 32 | maxItems: 1 |
| 33 | description: |
| 34 | root clock of bus, should reference the APB |
| 35 | clock in the second cell |
| 36 | |
| 37 | resets: |
| 38 | maxItems: 1 |
| 39 | |
| 40 | bus-frequency: |
| 41 | minimum: 500 |
| 42 | maximum: 4000000 |
| 43 | default: 100000 |
| 44 | description: frequency of the bus clock in Hz defaults to 100 kHz when not |
| 45 | specified |
| 46 | |
| 47 | multi-master: |
| 48 | type: boolean |
| 49 | description: |
| 50 | states that there is another master active on this bus |
| 51 | |
| 52 | required: |
| 53 | - reg |
| 54 | - compatible |
| 55 | - clocks |
| 56 | - resets |
| 57 | |
| 58 | unevaluatedProperties: false |
| 59 | |
| 60 | examples: |
| 61 | - | |
| 62 | #include <dt-bindings/clock/aspeed-clock.h> |
| 63 | i2c@40 { |
| 64 | #address-cells = <1>; |
| 65 | #size-cells = <0>; |
| 66 | compatible = "aspeed,ast2500-i2c-bus"; |
| 67 | reg = <0x40 0x40>; |
| 68 | clocks = <&syscon ASPEED_CLK_APB>; |
| 69 | resets = <&syscon ASPEED_RESET_I2C>; |
| 70 | bus-frequency = <100000>; |
| 71 | interrupts = <0>; |
| 72 | interrupt-parent = <&i2c_ic>; |
| 73 | }; |