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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/memory-controllers/renesas,rpc-if.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Renesas Reduced Pin Count Interface (RPC-IF)
maintainers:
- Sergei Shtylyov <sergei.shtylyov@gmail.com>
description: |
Renesas RPC-IF allows a SPI flash or HyperFlash connected to the SoC to
be accessed via the external address space read mode or the manual mode.
The flash chip itself should be represented by a subnode of the RPC-IF node.
The flash interface is selected based on the "compatible" property of this
subnode:
- if it contains "jedec,spi-nor", then SPI is used;
- if it contains "cfi-flash", then HyperFlash is used.
allOf:
- $ref: /schemas/spi/spi-controller.yaml#
properties:
compatible:
oneOf:
- items:
- enum:
- renesas,r8a774a1-rpc-if # RZ/G2M
- renesas,r8a774b1-rpc-if # RZ/G2N
- renesas,r8a774c0-rpc-if # RZ/G2E
- renesas,r8a774e1-rpc-if # RZ/G2H
- renesas,r8a7795-rpc-if # R-Car H3
- renesas,r8a7796-rpc-if # R-Car M3-W
- renesas,r8a77961-rpc-if # R-Car M3-W+
- renesas,r8a77965-rpc-if # R-Car M3-N
- renesas,r8a77970-rpc-if # R-Car V3M
- renesas,r8a77980-rpc-if # R-Car V3H
- renesas,r8a77990-rpc-if # R-Car E3
- renesas,r8a77995-rpc-if # R-Car D3
- renesas,r8a779a0-rpc-if # R-Car V3U
- const: renesas,rcar-gen3-rpc-if # a generic R-Car gen3 or RZ/G2{E,H,M,N} device
- items:
- enum:
- renesas,r8a779g0-rpc-if # R-Car V4H
- const: renesas,rcar-gen4-rpc-if # a generic R-Car gen4 device
- items:
- enum:
- renesas,r9a07g043-rpc-if # RZ/G2UL
- renesas,r9a07g044-rpc-if # RZ/G2{L,LC}
- renesas,r9a07g054-rpc-if # RZ/V2L
- const: renesas,rzg2l-rpc-if
reg:
items:
- description: RPC-IF registers
- description: direct mapping read mode area
- description: write buffer area
reg-names:
items:
- const: regs
- const: dirmap
- const: wbuf
clocks: true
interrupts:
maxItems: 1
power-domains:
maxItems: 1
resets:
maxItems: 1
patternProperties:
"flash@[0-9a-f]+$":
type: object
additionalProperties: true
properties:
compatible:
contains:
enum:
- cfi-flash
- jedec,spi-nor
required:
- compatible
- reg
- reg-names
- clocks
- power-domains
- resets
- '#address-cells'
- '#size-cells'
if:
properties:
compatible:
contains:
enum:
- renesas,rzg2l-rpc-if
then:
properties:
clocks:
items:
- description: SPI Multi IO Register access clock (SPI_CLK2)
- description: SPI Multi IO Main clock (SPI_CLK).
else:
properties:
clocks:
maxItems: 1
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/clock/renesas-cpg-mssr.h>
#include <dt-bindings/power/r8a77995-sysc.h>
spi@ee200000 {
compatible = "renesas,r8a77995-rpc-if", "renesas,rcar-gen3-rpc-if";
reg = <0xee200000 0x200>,
<0x08000000 0x4000000>,
<0xee208000 0x100>;
reg-names = "regs", "dirmap", "wbuf";
clocks = <&cpg CPG_MOD 917>;
power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
resets = <&cpg 917>;
#address-cells = <1>;
#size-cells = <0>;
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <40000000>;
spi-tx-bus-width = <1>;
spi-rx-bus-width = <1>;
};
};
|
