0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/i2c/aspeed,i2c.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs Device Tree Bindings
0008
0009 maintainers:
0010 - Rayn Chen <rayn_chen@aspeedtech.com>
0011
0012 allOf:
0013 - $ref: /schemas/i2c/i2c-controller.yaml#
0014
0015 properties:
0016 compatible:
0017 enum:
0018 - aspeed,ast2400-i2c-bus
0019 - aspeed,ast2500-i2c-bus
0020 - aspeed,ast2600-i2c-bus
0021
0022 reg:
0023 minItems: 1
0024 items:
0025 - description: address offset and range of bus
0026 - description: address offset and range of bus buffer
0027
0028 interrupts:
0029 maxItems: 1
0030
0031 clocks:
0032 maxItems: 1
0033 description:
0034 root clock of bus, should reference the APB
0035 clock in the second cell
0036
0037 resets:
0038 maxItems: 1
0039
0040 bus-frequency:
0041 minimum: 500
0042 maximum: 4000000
0043 default: 100000
0044 description: frequency of the bus clock in Hz defaults to 100 kHz when not
0045 specified
0046
0047 multi-master:
0048 type: boolean
0049 description:
0050 states that there is another master active on this bus
0051
0052 required:
0053 - reg
0054 - compatible
0055 - clocks
0056 - resets
0057
0058 unevaluatedProperties: false
0059
0060 examples:
0061 - |
0062 #include <dt-bindings/clock/aspeed-clock.h>
0063 i2c0: i2c-bus@40 {
0064 #address-cells = <1>;
0065 #size-cells = <0>;
0066 compatible = "aspeed,ast2500-i2c-bus";
0067 reg = <0x40 0x40>;
0068 clocks = <&syscon ASPEED_CLK_APB>;
0069 resets = <&syscon ASPEED_RESET_I2C>;
0070 bus-frequency = <100000>;
0071 interrupts = <0>;
0072 interrupt-parent = <&i2c_ic>;
0073 };
