From b65a40521d94299796f4128cc468a9781286ce92 Mon Sep 17 00:00:00 2001
From: Loic Poulain <loic.poulain@oss.qualcomm.com>
Date: Thu, 30 Jul 2026 18:00:31 +0200
Subject: [PATCH] dt-bindings: mmc: Document fixed-layout NVMEM provider
 support

Allow an eMMC hardware partition node to describe an NVMEM layout so the
partition can be exposed as an NVMEM provider. This lets a partition
(e.g. an eMMC boot partition) store device-specific information such as a
WiFi MAC address or a Bluetooth BD address and reference it through NVMEM
cells.

Accept "fixed-layout" as the partition node compatible, in addition to
"fixed-partitions", so the layout can be described directly on the
partition node.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
---
 .../devicetree/bindings/mmc/mmc-card.yaml     | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/mmc-card.yaml b/Documentation/devicetree/bindings/mmc/mmc-card.yaml
index a61d6c96df75..042289450847 100644
--- a/Documentation/devicetree/bindings/mmc/mmc-card.yaml
+++ b/Documentation/devicetree/bindings/mmc/mmc-card.yaml
@@ -38,7 +38,9 @@ patternProperties:
     properties:
       compatible:
         contains:
-          const: fixed-partitions
+          enum:
+            - fixed-partitions
+            - fixed-layout
 
 required:
   - compatible
@@ -86,6 +88,25 @@ examples:
                     read-only;
                 };
             };
+
+            partitions-boot2 {
+                compatible = "fixed-layout";
+
+                #address-cells = <1>;
+                #size-cells = <1>;
+
+                mac-addr@4400 {
+                    compatible = "mac-base";
+                    reg = <0x4400 0x6>;
+                    #nvmem-cell-cells = <1>;
+                };
+
+                bd-addr@5400 {
+                    compatible = "mac-base";
+                    reg = <0x5400 0x6>;
+                    #nvmem-cell-cells = <1>;
+                };
+            };
         };
     };