linux-kernel - [PATCH v2 1/2] bindings: ipmi: Add alert GPIO enhancement for SSIF BMC driver

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Message-Id: <20241022-ssif-alert-gpios-v2-1-c7dd6dd17a7e@gmail.com>
Date: Tue, 22 Oct 2024 09:20:46 +0800
From: Potin Lai <potin.lai.pt@...il.com>
To: Corey Minyard <minyard@....org>, 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 v2 1/2] bindings: ipmi: Add alert GPIO enhancement for SSIF
 BMC driver

Introduce the `alert-gpios` property to define an alert pin, enabling
the BMC to notify the host when a response is available.

Signed-off-by: Potin Lai <potin.lai.pt@...il.com>
---
 Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml b/Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml
index 02b662d780bb..7142151a3787 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
 
+  alert-gpios:
+    description:
+      GPIO pin designated for SSIF alert, used by the BMC to notify the
+      host when a response is available.
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -27,6 +33,7 @@ additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
     i2c {
         #address-cells = <1>;
         #size-cells = <0>;
@@ -34,5 +41,6 @@ examples:
         ssif-bmc@10 {
             compatible = "ssif-bmc";
             reg = <0x10>;
+            alert-gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
         };
     };

-- 
2.31.1