linux-kernel - [PATCH 3/4] dt-bindings: cache: sifive,ccache0: Add sifive,cache-ops property

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Message-ID: <CAJM55Z8DXDs6LT0JrTyEMp8V6BHvsjUW7aJ8Gj+fRGsasHAi_A@mail.gmail.com>
Date:   Wed, 25 Oct 2023 11:56:41 -0700
From:   Emil Renner Berthing <emil.renner.berthing@...onical.com>
To:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Conor Dooley <conor@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>
Subject: [PATCH 3/4] dt-bindings: cache: sifive,ccache0: Add sifive,cache-ops property

This cache controller also supports flushing cache lines by writing
their address to a register. This can be used for cache management on
SoCs with non-coherent DMAs that predate the RISC-V Zicbom extension
such as the StarFive JH7100 SoC.

Signed-off-by: Emil Renner Berthing <emil.renner.berthing@...onical.com>
---
 Documentation/devicetree/bindings/cache/sifive,ccache0.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/cache/sifive,ccache0.yaml
b/Documentation/devicetree/bindings/cache/sifive,ccache0.yaml
index 7e8cebe21584..36ae6f48ce0b 100644
--- a/Documentation/devicetree/bindings/cache/sifive,ccache0.yaml
+++ b/Documentation/devicetree/bindings/cache/sifive,ccache0.yaml
@@ -81,6 +81,11 @@ properties:
       The reference to the reserved-memory for the L2 Loosely
Integrated Memory region.
       The reserved memory node should be defined as per the bindings
in reserved-memory.txt.

+  sifive,cache-ops:
+    type: boolean
+    description: |
+      Use this cache controller for non-standard cache management operations.
+
 allOf:
   - $ref: /schemas/cache-controller.yaml#

-- 
2.40.1