linux-kernel - [PATCH] dt-bindings: nvmem: u-boot,env: add basic NVMEM cells

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Date:   Sun,  3 Jul 2022 10:48:43 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Tom Rini <trini@...sulko.com>,
        Ahmad Fatoum <a.fatoum@...gutronix.de>,
        linux-arm-kernel@...ts.infradead.org, u-boot@...ts.denx.de,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH] dt-bindings: nvmem: u-boot,env: add basic NVMEM cells

From: Rafał Miłecki <rafal@...ecki.pl>

U-Boot doesn't have cells at hardcoded addresses. They are stored in
internal format. It's still important to define relevant cells in DT so
NVMEM consumers can reference them.

Update binding to allow including basic cells as NVMEM device subnodes.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 .../devicetree/bindings/nvmem/u-boot,env.yaml       | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml b/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
index e70b2a60cb9a..e96bca99f2d9 100644
--- a/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
+++ b/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
@@ -24,6 +24,8 @@ description: |
   Right now only flash partition case is covered but it may be extended to e.g.
   UBI volumes in the future.
 
+  Variables can be defined as NVMEM device subnodes.
+
 maintainers:
   - Rafał Miłecki <rafal@...ecki.pl>
 
@@ -40,6 +42,14 @@ properties:
   reg:
     maxItems: 1
 
+  bootcmd:
+    type: object
+    description: Command to use for automatic booting
+
+  ethaddr:
+    type: object
+    description: Ethernet interface's MAC address
+
 additionalProperties: false
 
 examples:
@@ -58,5 +68,8 @@ examples:
         env: partition@...00 {
             compatible = "u-boot,env";
             reg = <0x40000 0x10000>;
+
+            mac: ethaddr {
+            };
         };
     };
-- 
2.34.1