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+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/snps,designware-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys DesignWare APB I2C Controller
+
+maintainers:
+ - Jarkko Nikula <jarkko.nikula@linux.intel.com>
+
+allOf:
+ - $ref: /schemas/i2c/i2c-controller.yaml#
+ - if:
+ properties:
+ compatible:
+ not:
+ contains:
+ const: mscc,ocelot-i2c
+ then:
+ properties:
+ reg:
+ maxItems: 1
+
+properties:
+ compatible:
+ oneOf:
+ - description: Generic Synopsys DesignWare I2C controller
+ const: snps,designware-i2c
+ - description: Microsemi Ocelot SoCs I2C controller
+ items:
+ - const: mscc,ocelot-i2c
+ - const: snps,designware-i2c
+ - description: Baikal-T1 SoC System I2C controller
+ const: baikal,bt1-sys-i2c
+
+ reg:
+ minItems: 1
+ items:
+ - description: DW APB I2C controller memory mapped registers
+ - description: |
+ ICPU_CFG:TWI_DELAY registers to setup the SDA hold time.
+ This registers are specific to the Ocelot I2C-controller.
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ minItems: 1
+ items:
+ - description: I2C controller reference clock source
+ - description: APB interface clock source
+
+ clock-names:
+ minItems: 1
+ items:
+ - const: ref
+ - const: pclk
+
+ resets:
+ maxItems: 1
+
+ clock-frequency:
+ description: Desired I2C bus clock frequency in Hz
+ enum: [100000, 400000, 1000000, 3400000]
+ default: 400000
+
+ i2c-sda-hold-time-ns:
+ description: |
+ The property should contain the SDA hold time in nanoseconds. This option
+ is only supported in hardware blocks version 1.11a or newer or on
+ Microsemi SoCs.
+
+ i2c-scl-falling-time-ns:
+ description: |
+ The property should contain the SCL falling time in nanoseconds.
+ This value is used to compute the tLOW period.
+ default: 300
+
+ i2c-sda-falling-time-ns:
+ description: |
+ The property should contain the SDA falling time in nanoseconds.
+ This value is used to compute the tHIGH period.
+ default: 300
+
+ dmas:
+ items:
+ - description: TX DMA Channel
+ - description: RX DMA Channel
+
+ dma-names:
+ items:
+ - const: tx
+ - const: rx
+
+unevaluatedProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+examples:
+ - |
+ i2c@f0000 {
+ compatible = "snps,designware-i2c";
+ reg = <0xf0000 0x1000>;
+ interrupts = <11>;
+ clock-frequency = <400000>;
+ };
+ - |
+ i2c@1120000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x1120000 0x1000>;
+ interrupts = <12 1>;
+ clock-frequency = <400000>;
+ i2c-sda-hold-time-ns = <300>;
+ i2c-sda-falling-time-ns = <300>;
+ i2c-scl-falling-time-ns = <300>;
+ };
+ - |
+ i2c@2000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x2000 0x100>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ clock-frequency = <400000>;
+ clocks = <&i2cclk>;
+ interrupts = <0>;
+
+ eeprom@64 {
+ compatible = "atmel,24c02";
+ reg = <0x64>;
+ };
+ };
+ - |
+ i2c@100400 {
+ compatible = "mscc,ocelot-i2c", "snps,designware-i2c";
+ reg = <0x100400 0x100>, <0x198 0x8>;
+ pinctrl-0 = <&i2c_pins>;
+ pinctrl-names = "default";
+ interrupts = <8>;
+ clocks = <&ahb_clk>;
+ };
+...