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From:   Conor Dooley <conor@kernel.org>
To:     palmer@dabbelt.com
Cc:     conor@kernel.org, Conor Dooley <conor.dooley@microchip.com>,
        Ley Foon Tan <leyfoon.tan@starfivetech.com>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Jonathan Corbet <corbet@lwn.net>, Alex Shi <alexs@kernel.org>,
        Yanteng Si <siyanteng@loongson.cn>,
        Lorenzo Pieralisi <lpieralisi@kernel.org>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-riscv@lists.infradead.org, linux-doc@vger.kernel.org
Subject: [PATCH v1 2/2] dt-bindings: riscv: add a capacity-dmips-mhz cpu property
Date:   Wed,  4 Jan 2023 18:05:14 +0000
Message-Id: <20230104180513.1379453-3-conor@kernel.org>
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From: Conor Dooley <conor.dooley@microchip.com>

Since commit 03f11f03dbfe ("RISC-V: Parse cpu topology during boot.")
RISC-V has used the generic arch topology code, which provides for
disparate CPU capacities. We never defined a binding to acquire this
information from the DT though, so document the one already used by the
generic arch topology code: "capacity-dmips-mhz".

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 Documentation/devicetree/bindings/riscv/cpus.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index c6720764e765..2480c2460759 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -114,6 +114,12 @@ properties:
       List of phandles to idle state nodes supported
       by this hart (see ./idle-states.yaml).
 
+  capacity-dmips-mhz:
+    description:
+      u32 value representing CPU capacity (see ../cpu/cpu-capacity.txt) in
+      DMIPS/MHz, relative to highest capacity-dmips-mhz
+      in the system.
+
 required:
   - riscv,isa
   - interrupt-controller
-- 
2.39.0