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Date: Wed, 26 Jun 2019 17:57:59 -0600
From: Rob Herring <robh@...nel.org>
To: Paul Walmsley <paul.walmsley@...ive.com>,
linux-riscv@...ts.infradead.org, Palmer Dabbelt <palmer@...ive.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: riscv: Limit cpus schema to only check RiscV 'cpu' nodes
Matching on the 'cpus' node was a bad choice because the schema is
incorrectly applied to non-RiscV cpus nodes. As we now have a common cpus
schema which checks the general structure, it is also redundant to do so
in the Risc-V CPU schema.
The downside is one could conceivably mix different architecture's cpu
nodes or have typos in the compatible string. The latter problem pretty
much exists for every schema.
Signed-off-by: Rob Herring <robh@...nel.org>
---
.../devicetree/bindings/riscv/cpus.yaml | 143 ++++++++----------
1 file changed, 61 insertions(+), 82 deletions(-)
diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index 27f02ec4bb45..67e54251eb90 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -10,97 +10,76 @@ maintainers:
- Paul Walmsley <paul.walmsley@...ive.com>
- Palmer Dabbelt <palmer@...ive.com>
-allOf:
- - $ref: /schemas/cpus.yaml#
-
properties:
- $nodename:
- const: cpus
- description: Container of cpu nodes
-
- '#address-cells':
- const: 1
- description: |
- A single unsigned 32-bit integer uniquely identifies each RISC-V
- hart in a system. (See the "reg" node under the "cpu" node,
- below).
-
- '#size-cells':
- const: 0
+ compatible:
+ items:
+ - enum:
+ - sifive,rocket0
+ - sifive,e5
+ - sifive,e51
+ - sifive,u54-mc
+ - sifive,u54
+ - sifive,u5
+ - const: riscv
+ description:
+ Identifies that the hart uses the RISC-V instruction set
+ and identifies the type of the hart.
+
+ mmu-type:
+ allOf:
+ - $ref: "/schemas/types.yaml#/definitions/string"
+ - enum:
+ - riscv,sv32
+ - riscv,sv39
+ - riscv,sv48
+ description:
+ Identifies the MMU address translation mode used on this
+ hart. These values originate from the RISC-V Privileged
+ Specification document, available from
+ https://riscv.org/specifications/
+
+ riscv,isa:
+ allOf:
+ - $ref: "/schemas/types.yaml#/definitions/string"
+ - enum:
+ - rv64imac
+ - rv64imafdc
+ description:
+ Identifies the specific RISC-V instruction set architecture
+ supported by the hart. These are documented in the RISC-V
+ User-Level ISA document, available from
+ https://riscv.org/specifications/
+
+ timebase-frequency:
+ type: integer
+ minimum: 1
+ description:
+ Specifies the clock frequency of the system timer in Hz.
+ This value is common to all harts on a single system image.
+
+ interrupt-controller:
+ type: object
+ description: Describes the CPU's local interrupt controller
-patternProperties:
- '^cpu@[0-9a-f]+$':
properties:
- compatible:
- type: array
- items:
- - enum:
- - sifive,rocket0
- - sifive,e5
- - sifive,e51
- - sifive,u54-mc
- - sifive,u54
- - sifive,u5
- - const: riscv
- description:
- Identifies that the hart uses the RISC-V instruction set
- and identifies the type of the hart.
-
- mmu-type:
- allOf:
- - $ref: "/schemas/types.yaml#/definitions/string"
- - enum:
- - riscv,sv32
- - riscv,sv39
- - riscv,sv48
- description:
- Identifies the MMU address translation mode used on this
- hart. These values originate from the RISC-V Privileged
- Specification document, available from
- https://riscv.org/specifications/
-
- riscv,isa:
- allOf:
- - $ref: "/schemas/types.yaml#/definitions/string"
- - enum:
- - rv64imac
- - rv64imafdc
- description:
- Identifies the specific RISC-V instruction set architecture
- supported by the hart. These are documented in the RISC-V
- User-Level ISA document, available from
- https://riscv.org/specifications/
+ '#interrupt-cells':
+ const: 1
- timebase-frequency:
- type: integer
- minimum: 1
- description:
- Specifies the clock frequency of the system timer in Hz.
- This value is common to all harts on a single system image.
-
- interrupt-controller:
- type: object
- description: Describes the CPU's local interrupt controller
-
- properties:
- '#interrupt-cells':
- const: 1
-
- compatible:
- const: riscv,cpu-intc
-
- interrupt-controller: true
+ compatible:
+ const: riscv,cpu-intc
- required:
- - '#interrupt-cells'
- - compatible
- - interrupt-controller
+ interrupt-controller: true
required:
- - riscv,isa
- - timebase-frequency
+ - '#interrupt-cells'
+ - compatible
- interrupt-controller
+required:
+ - riscv,isa
+ - timebase-frequency
+ - interrupt-controller
+
examples:
- |
// Example 1: SiFive Freedom U540G Development Kit
--
2.20.1
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