linux-kernel - [PATCH 1/2] bindings: ipmi: ssif-bmc: Add property to adjust response timeout

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Message-Id: <20250203-ssif-response-timeout-ms-v1-1-6fe279740181@gmail.com>
Date: Mon, 03 Feb 2025 21:09:13 +0800
From: Potin Lai <potin.lai.pt@...il.com>
To: Corey Minyard <corey@...yard.net>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Quan Nguyen <quan@...amperecomputing.com>, 
 Patrick Williams <patrick@...cx.xyz>
Cc: openipmi-developer@...ts.sourceforge.net, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Cosmo Chou <cosmo.chou@...ntatw.com>, 
 Potin Lai <potin.lai@...ntatw.com>, Potin Lai <potin.lai.pt@...il.com>
Subject: [PATCH 1/2] bindings: ipmi: ssif-bmc: Add property to adjust
 response timeout

The SSIF response is handled by a userspace application, which may exceed
the default 500 ms timeout when the BMC or application is under heavy load.

Add a new device tree property, `timeout-ms`, allowing platforms to adjust
the response timeout based on their specific requirements. This helps
prevent timeouts in scenarios where longer processing times are expected.

Signed-off-by: Potin Lai <potin.lai.pt@...il.com>
---
 Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml b/Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml
index 02b662d780bb..c8a863d44f97 100644
--- a/Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml
+++ b/Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml
@@ -19,6 +19,12 @@ properties:
   reg:
     maxItems: 1
 
+  timeout-ms:
+    minimum: 0
+    maximum: 4294967295
+    default: 500
+    description: Response timeout in millisecond.
+
 required:
   - compatible
   - reg

-- 
2.31.1