| # 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 <wsa+renesas@sang-engineering.com> |
| |
| 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 |
| - renesas,i2c-r8a779h0 # R-Car V4M |
| - 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 <dt-bindings/clock/r8a7791-cpg-mssr.h> |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/power/r8a7791-sysc.h> |
| |
| i2c0: i2c@e6508000 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; |
| reg = <0xe6508000 0x40>; |
| interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>; |
| clock-frequency = <400000>; |
| clocks = <&cpg CPG_MOD 931>; |
| power-domains = <&sysc R8A7791_PD_ALWAYS_ON>; |
| resets = <&cpg 931>; |
| i2c-scl-internal-delay-ns = <6>; |
| }; |
