1 files changed, 103 insertions, 0 deletions
diff --git a/dts/Bindings/nvmem/u-boot,env.yaml b/dts/Bindings/nvmem/u-boot,env.yaml
new file mode 100644
index 0000000000..9c36afc708
--- /dev/null
+++ b/dts/Bindings/nvmem/u-boot,env.yaml
@@ -0,0 +1,103 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/u-boot,env.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: U-Boot environment variables
+
+description: |
+  U-Boot uses environment variables to store device parameters and
+  configuration. They may be used for booting process, setup or keeping end user
+  info.
+
+  Data is stored using U-Boot specific formats (variant specific header and NUL
+  separated key-value pairs).
+
+  Environment data can be stored on various storage entities, e.g.:
+  1. Raw flash partition
+  2. UBI volume
+
+  This binding allows marking storage device (as containing env data) and
+  specifying used format.
+
+  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@milecki.pl>
+
+properties:
+  compatible:
+    oneOf:
+      - description: A standalone env data block
+        const: u-boot,env
+      - description: Two redundant blocks with active one flagged
+        const: u-boot,env-redundant-bool
+      - description: Two redundant blocks with active having higher counter
+        const: u-boot,env-redundant-count
+      - description: Broadcom's variant with custom header
+        const: brcm,env
+
+  reg:
+    maxItems: 1
+
+  bootcmd:
+    type: object
+    description: Command to use for automatic booting
+
+  ethaddr:
+    type: object
+    description: Ethernet interfaces base MAC address.
+    additionalProperties: false
+
+    properties:
+      "#nvmem-cell-cells":
+        description: The first argument is a MAC address offset.
+        const: 1
+
+additionalProperties: false
+
+examples:
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            reg = <0x0 0x40000>;
+            label = "u-boot";
+            read-only;
+        };
+
+        env: partition@40000 {
+            compatible = "u-boot,env";
+            reg = <0x40000 0x10000>;
+
+            mac: ethaddr {
+                #nvmem-cell-cells = <1>;
+            };
+        };
+    };
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            reg = <0x0 0x100000>;
+            compatible = "brcm,u-boot";
+            label = "u-boot";
+
+            partition-u-boot-env {
+                compatible = "brcm,env";
+
+                ethaddr {
+                };
+            };
+        };
+    };