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158 lines
4.1 KiB
158 lines
4.1 KiB
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/i2c/renesas,rcar-i2c.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Renesas R-Car I2C Controller |
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maintainers: |
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- Wolfram Sang <[email protected]> |
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properties: |
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compatible: |
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oneOf: |
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- items: |
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- enum: |
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- renesas,i2c-r8a7778 # R-Car M1A |
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- renesas,i2c-r8a7779 # R-Car H1 |
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- const: renesas,rcar-gen1-i2c # R-Car Gen1 |
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- items: |
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- enum: |
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- renesas,i2c-r8a7742 # RZ/G1H |
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- renesas,i2c-r8a7743 # RZ/G1M |
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- renesas,i2c-r8a7744 # RZ/G1N |
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- renesas,i2c-r8a7745 # RZ/G1E |
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- renesas,i2c-r8a77470 # RZ/G1C |
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- renesas,i2c-r8a7790 # R-Car H2 |
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- renesas,i2c-r8a7791 # R-Car M2-W |
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- renesas,i2c-r8a7792 # R-Car V2H |
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- renesas,i2c-r8a7793 # R-Car M2-N |
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- renesas,i2c-r8a7794 # R-Car E2 |
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- const: renesas,rcar-gen2-i2c # R-Car Gen2 and RZ/G1 |
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- items: |
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- enum: |
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- renesas,i2c-r8a774a1 # RZ/G2M |
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- renesas,i2c-r8a774b1 # RZ/G2N |
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- renesas,i2c-r8a774c0 # RZ/G2E |
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- renesas,i2c-r8a774e1 # RZ/G2H |
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- renesas,i2c-r8a7795 # R-Car H3 |
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- renesas,i2c-r8a7796 # R-Car M3-W |
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- renesas,i2c-r8a77961 # R-Car M3-W+ |
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- renesas,i2c-r8a77965 # R-Car M3-N |
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- renesas,i2c-r8a77970 # R-Car V3M |
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- renesas,i2c-r8a77980 # R-Car V3H |
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- renesas,i2c-r8a77990 # R-Car E3 |
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- renesas,i2c-r8a77995 # R-Car D3 |
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- renesas,i2c-r8a779a0 # R-Car V3U |
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- const: renesas,rcar-gen3-i2c # R-Car Gen3 and RZ/G2 |
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reg: |
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maxItems: 1 |
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interrupts: |
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maxItems: 1 |
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clock-frequency: |
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description: |
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Desired I2C bus clock frequency in Hz. The absence of this property |
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indicates the default frequency 100 kHz. |
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clocks: |
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maxItems: 1 |
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power-domains: |
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maxItems: 1 |
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resets: |
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maxItems: 1 |
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dmas: |
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minItems: 2 |
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maxItems: 4 |
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description: |
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Must contain a list of pairs of references to DMA specifiers, one for |
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transmission, and one for reception. |
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dma-names: |
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minItems: 2 |
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maxItems: 4 |
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items: |
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enum: |
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- tx |
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- rx |
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i2c-scl-falling-time-ns: |
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default: 35 |
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description: |
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Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C |
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specification. |
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i2c-scl-internal-delay-ns: |
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default: 50 |
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description: |
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Number of nanoseconds the IP core additionally needs to setup SCL. |
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i2c-scl-rising-time-ns: |
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default: 200 |
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description: |
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Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C |
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specification. |
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required: |
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- compatible |
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- reg |
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- interrupts |
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- clocks |
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- power-domains |
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- '#address-cells' |
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- '#size-cells' |
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allOf: |
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- $ref: /schemas/i2c/i2c-controller.yaml# |
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- if: |
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properties: |
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compatible: |
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contains: |
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enum: |
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- renesas,rcar-gen1-i2c |
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- renesas,rcar-gen2-i2c |
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then: |
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properties: |
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dmas: false |
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dma-names: false |
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- if: |
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properties: |
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compatible: |
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contains: |
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enum: |
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- renesas,rcar-gen2-i2c |
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- renesas,rcar-gen3-i2c |
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then: |
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required: |
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- resets |
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unevaluatedProperties: false |
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examples: |
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- | |
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#include <dt-bindings/clock/r8a7791-cpg-mssr.h> |
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#include <dt-bindings/interrupt-controller/arm-gic.h> |
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#include <dt-bindings/power/r8a7791-sysc.h> |
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i2c0: i2c@e6508000 { |
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#address-cells = <1>; |
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#size-cells = <0>; |
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compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; |
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reg = <0xe6508000 0x40>; |
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interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>; |
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clock-frequency = <400000>; |
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clocks = <&cpg CPG_MOD 931>; |
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power-domains = <&sysc R8A7791_PD_ALWAYS_ON>; |
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resets = <&cpg 931>; |
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i2c-scl-internal-delay-ns = <6>; |
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};
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