140 lines
3.6 KiB
YAML
140 lines
3.6 KiB
YAML
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# 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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$id: http://devicetree.org/schemas/memory-controllers/renesas,rpc-if.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Renesas Reduced Pin Count Interface (RPC-IF)
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maintainers:
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- Sergei Shtylyov <sergei.shtylyov@gmail.com>
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description: |
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Renesas RPC-IF allows a SPI flash or HyperFlash connected to the SoC to
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be accessed via the external address space read mode or the manual mode.
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The flash chip itself should be represented by a subnode of the RPC-IF node.
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The flash interface is selected based on the "compatible" property of this
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subnode:
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- if it contains "jedec,spi-nor", then SPI is used;
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- if it contains "cfi-flash", then HyperFlash is used.
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allOf:
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- $ref: "/schemas/spi/spi-controller.yaml#"
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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,r8a774a1-rpc-if # RZ/G2M
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- renesas,r8a774b1-rpc-if # RZ/G2N
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- renesas,r8a774c0-rpc-if # RZ/G2E
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- renesas,r8a774e1-rpc-if # RZ/G2H
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- renesas,r8a7795-rpc-if # R-Car H3
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- renesas,r8a7796-rpc-if # R-Car M3-W
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- renesas,r8a77961-rpc-if # R-Car M3-W+
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- renesas,r8a77965-rpc-if # R-Car M3-N
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- renesas,r8a77970-rpc-if # R-Car V3M
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- renesas,r8a77980-rpc-if # R-Car V3H
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- renesas,r8a77990-rpc-if # R-Car E3
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- renesas,r8a77995-rpc-if # R-Car D3
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- renesas,r8a779a0-rpc-if # R-Car V3U
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- const: renesas,rcar-gen3-rpc-if # a generic R-Car gen3 or RZ/G2{E,H,M,N} device
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- items:
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- enum:
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- renesas,r9a07g043-rpc-if # RZ/G2UL
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- renesas,r9a07g044-rpc-if # RZ/G2{L,LC}
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- renesas,r9a07g054-rpc-if # RZ/V2L
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- const: renesas,rzg2l-rpc-if
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reg:
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items:
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- description: RPC-IF registers
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- description: direct mapping read mode area
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- description: write buffer area
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reg-names:
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items:
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- const: regs
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- const: dirmap
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- const: wbuf
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clocks: true
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interrupts:
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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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patternProperties:
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"flash@[0-9a-f]+$":
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type: object
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properties:
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compatible:
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contains:
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enum:
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- cfi-flash
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- jedec,spi-nor
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required:
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- compatible
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- reg
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- reg-names
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- clocks
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- power-domains
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- resets
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- '#address-cells'
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- '#size-cells'
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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,rzg2l-rpc-if
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then:
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properties:
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clocks:
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items:
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- description: SPI Multi IO Register access clock (SPI_CLK2)
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- description: SPI Multi IO Main clock (SPI_CLK).
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else:
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properties:
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clocks:
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maxItems: 1
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/renesas-cpg-mssr.h>
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#include <dt-bindings/power/r8a77995-sysc.h>
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spi@ee200000 {
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compatible = "renesas,r8a77995-rpc-if", "renesas,rcar-gen3-rpc-if";
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reg = <0xee200000 0x200>,
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<0x08000000 0x4000000>,
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<0xee208000 0x100>;
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reg-names = "regs", "dirmap", "wbuf";
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clocks = <&cpg CPG_MOD 917>;
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power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
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resets = <&cpg 917>;
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#address-cells = <1>;
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#size-cells = <0>;
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flash@0 {
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compatible = "jedec,spi-nor";
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reg = <0>;
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spi-max-frequency = <40000000>;
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spi-tx-bus-width = <1>;
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spi-rx-bus-width = <1>;
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};
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};
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