linux-kernel - [PATCH 2/2] dt-bindings: nvmem: add env-size property for u-boot env layout

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Message-ID:
 <OSBPR01MB16702D6947772E526F64D63CBC24A@OSBPR01MB1670.jpnprd01.prod.outlook.com>
Date: Wed, 30 Jul 2025 21:17:47 +0800
From: Shiji Yang <yangshiji66@...look.com>
To: devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Rafał Miłecki <rafal@...ecki.pl>,
	Srinivas Kandagatla <srini@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shiji Yang <yangshiji66@...look.com>
Subject: [PATCH 2/2] dt-bindings: nvmem: add env-size property for u-boot env layout

This newly introduced property allows users to declare the size of
the environment storage area.

Signed-off-by: Shiji Yang <yangshiji66@...look.com>
---
 .../devicetree/bindings/nvmem/layouts/u-boot,env.yaml      | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml b/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
index 56a8f55d4..e0b65a53e 100644
--- a/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
+++ b/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
@@ -46,6 +46,12 @@ properties:
     type: object
     description: Command to use for automatic booting
 
+  env-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the environment storage area in bytes. If this property
+      is not defined, the default size is the partition size.
+
   ethaddr:
     type: object
     description: Ethernet interfaces base MAC address.
@@ -85,6 +91,7 @@ examples:
         env: partition@...00 {
             compatible = "u-boot,env";
             reg = <0x40000 0x10000>;
+            env-size = <0x1000>;
 
             mac: ethaddr {
                 #nvmem-cell-cells = <1>;
-- 
2.50.0