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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/clock/renesas,cpg-mssr.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: Renesas Clock Pulse Generator / Module Standby and Software Reset
maintainers:
- Geert Uytterhoeven <geert+renesas@glider.be>
description: |
On Renesas ARM SoCs (SH/R-Mobile, R-Car, RZ), the CPG (Clock Pulse Generator)
and MSSR (Module Standby and Software Reset) blocks are intimately connected,
and share the same register block.
They provide the following functionalities:
- The CPG block generates various core clocks,
- The MSSR block provides two functions:
1. Module Standby, providing a Clock Domain to control the clock supply
to individual SoC devices,
2. Reset Control, to perform a software reset of individual SoC devices.
properties:
compatible:
enum:
- renesas,r7s9210-cpg-mssr # RZ/A2
- renesas,r8a7742-cpg-mssr # RZ/G1H
- renesas,r8a7743-cpg-mssr # RZ/G1M
- renesas,r8a7744-cpg-mssr # RZ/G1N
- renesas,r8a7745-cpg-mssr # RZ/G1E
- renesas,r8a77470-cpg-mssr # RZ/G1C
- renesas,r8a774a1-cpg-mssr # RZ/G2M
- renesas,r8a774b1-cpg-mssr # RZ/G2N
- renesas,r8a774c0-cpg-mssr # RZ/G2E
- renesas,r8a7790-cpg-mssr # R-Car H2
- renesas,r8a7791-cpg-mssr # R-Car M2-W
- renesas,r8a7792-cpg-mssr # R-Car V2H
- renesas,r8a7793-cpg-mssr # R-Car M2-N
- renesas,r8a7794-cpg-mssr # R-Car E2
- renesas,r8a7795-cpg-mssr # R-Car H3
- renesas,r8a7796-cpg-mssr # R-Car M3-W
- renesas,r8a77961-cpg-mssr # R-Car M3-W+
- renesas,r8a77965-cpg-mssr # R-Car M3-N
- renesas,r8a77970-cpg-mssr # R-Car V3M
- renesas,r8a77980-cpg-mssr # R-Car V3H
- renesas,r8a77990-cpg-mssr # R-Car E3
- renesas,r8a77995-cpg-mssr # R-Car D3
reg:
maxItems: 1
clocks:
minItems: 1
maxItems: 2
clock-names:
minItems: 1
maxItems: 2
items:
enum:
- extal # All
- extalr # Most R-Car Gen3 and RZ/G2
- usb_extal # Most R-Car Gen2 and RZ/G1
'#clock-cells':
description: |
- For CPG core clocks, the two clock specifier cells must be "CPG_CORE"
and a core clock reference, as defined in
<dt-bindings/clock/*-cpg-mssr.h>
- For module clocks, the two clock specifier cells must be "CPG_MOD" and
a module number, as defined in the datasheet.
const: 2
'#power-domain-cells':
description:
SoC devices that are part of the CPG/MSSR Clock Domain and can be
power-managed through Module Standby should refer to the CPG device node
in their "power-domains" property, as documented by the generic PM Domain
bindings in Documentation/devicetree/bindings/power/power-domain.yaml.
const: 0
'#reset-cells':
description:
The single reset specifier cell must be the module number, as defined in
the datasheet.
const: 1
if:
not:
properties:
compatible:
items:
enum:
- renesas,r7s9210-cpg-mssr
then:
required:
- '#reset-cells'
required:
- compatible
- reg
- clocks
- clock-names
- '#clock-cells'
- '#power-domain-cells'
additionalProperties: false
examples:
- |
cpg: clock-controller@e6150000 {
compatible = "renesas,r8a7795-cpg-mssr";
reg = <0xe6150000 0x1000>;
clocks = <&extal_clk>, <&extalr_clk>;
clock-names = "extal", "extalr";
#clock-cells = <2>;
#power-domain-cells = <0>;
#reset-cells = <1>;
};
|
