# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/i2c/renesas,rcar-i2c.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Renesas R-Car I2C Controller maintainers: - Wolfram Sang properties: compatible: oneOf: - items: - enum: - renesas,i2c-r8a7778 # R-Car M1A - renesas,i2c-r8a7779 # R-Car H1 - const: renesas,rcar-gen1-i2c # R-Car Gen1 - items: - enum: - renesas,i2c-r8a7742 # RZ/G1H - renesas,i2c-r8a7743 # RZ/G1M - renesas,i2c-r8a7744 # RZ/G1N - renesas,i2c-r8a7745 # RZ/G1E - renesas,i2c-r8a77470 # RZ/G1C - renesas,i2c-r8a7790 # R-Car H2 - renesas,i2c-r8a7791 # R-Car M2-W - renesas,i2c-r8a7792 # R-Car V2H - renesas,i2c-r8a7793 # R-Car M2-N - renesas,i2c-r8a7794 # R-Car E2 - const: renesas,rcar-gen2-i2c # R-Car Gen2 and RZ/G1 - items: - enum: - renesas,i2c-r8a774a1 # RZ/G2M - renesas,i2c-r8a774b1 # RZ/G2N - renesas,i2c-r8a774c0 # RZ/G2E - renesas,i2c-r8a774e1 # RZ/G2H - renesas,i2c-r8a7795 # R-Car H3 - renesas,i2c-r8a7796 # R-Car M3-W - renesas,i2c-r8a77961 # R-Car M3-W+ - renesas,i2c-r8a77965 # R-Car M3-N - renesas,i2c-r8a77970 # R-Car V3M - renesas,i2c-r8a77980 # R-Car V3H - renesas,i2c-r8a77990 # R-Car E3 - renesas,i2c-r8a77995 # R-Car D3 - const: renesas,rcar-gen3-i2c # R-Car Gen3 and RZ/G2 - items: - enum: - renesas,i2c-r8a779a0 # R-Car V3U - renesas,i2c-r8a779f0 # R-Car S4-8 - renesas,i2c-r8a779g0 # R-Car V4H - const: renesas,rcar-gen4-i2c # R-Car Gen4 reg: maxItems: 1 interrupts: maxItems: 1 clock-frequency: description: Desired I2C bus clock frequency in Hz. The absence of this property indicates the default frequency 100 kHz. clocks: maxItems: 1 power-domains: maxItems: 1 resets: maxItems: 1 dmas: minItems: 2 maxItems: 4 description: Must contain a list of pairs of references to DMA specifiers, one for transmission, and one for reception. dma-names: minItems: 2 maxItems: 4 items: enum: - tx - rx i2c-scl-falling-time-ns: default: 35 description: Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C specification. i2c-scl-internal-delay-ns: default: 50 description: Number of nanoseconds the IP core additionally needs to setup SCL. i2c-scl-rising-time-ns: default: 200 description: Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C specification. required: - compatible - reg - interrupts - clocks - power-domains - '#address-cells' - '#size-cells' allOf: - $ref: /schemas/i2c/i2c-controller.yaml# - if: properties: compatible: contains: enum: - renesas,rcar-gen1-i2c - renesas,rcar-gen2-i2c then: properties: dmas: false dma-names: false - if: properties: compatible: contains: enum: - renesas,rcar-gen2-i2c - renesas,rcar-gen3-i2c - renesas,rcar-gen4-i2c then: required: - resets unevaluatedProperties: false examples: - | #include #include #include i2c0: i2c@e6508000 { #address-cells = <1>; #size-cells = <0>; compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; reg = <0xe6508000 0x40>; interrupts = ; clock-frequency = <400000>; clocks = <&cpg CPG_MOD 931>; power-domains = <&sysc R8A7791_PD_ALWAYS_ON>; resets = <&cpg 931>; i2c-scl-internal-delay-ns = <6>; };