linux-kernel - [PATCH v3 2/2] dt-bindings: mtd: Document use of nvmem-cells compatible

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Message-Id: <20210308011853.19360-2-ansuelsmth@gmail.com>
Date:   Mon,  8 Mar 2021 02:18:45 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Vignesh Raghavendra <vigneshr@...com>
Cc:     Ansuel Smith <ansuelsmth@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Rob Herring <robh+dt@...nel.org>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 2/2] dt-bindings: mtd: Document use of nvmem-cells compatible

Document nvmem-cells compatible used to treat mtd partitions as a
nvmem provider.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 .../bindings/mtd/partitions/nvmem-cells.yaml  | 105 ++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/partitions/nvmem-cells.yaml

diff --git a/Documentation/devicetree/bindings/mtd/partitions/nvmem-cells.yaml b/Documentation/devicetree/bindings/mtd/partitions/nvmem-cells.yaml
new file mode 100644
index 000000000000..4ed246b27985
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/partitions/nvmem-cells.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/partitions/nvmem-cells.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nvmem cells
+
+description: |
+  This binding can be used to treat the specific partition as a nvmem provider.
+  Each direct subnodes represents the nvmem cells and won't be parsed as fixed-partitions.
+  Fixed-partitions bindings described in fixed-partitions.yaml apply to the nvmem provider node.
+
+maintainers:
+  - Ansuel Smith <ansuelsmth@...il.com>
+
+properties:
+  compatible:
+    const: nvmem-cells
+
+  "#address-cells": true
+
+  "#size-cells": true
+
+  reg:
+    description: partition offset and size within the flash
+    maxItems: 1
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+  - reg
+
+additionalProperties: true
+
+examples:
+  - |
+    partitions {
+      compatible = "fixed-partitions";
+      #address-cells = <1>;
+      #size-cells = <1>;
+
+      /* ... */
+
+      };
+      art: art@...0000 {
+        compatible = "nvmem-cells";
+        reg = <0x1200000 0x0140000>;
+        label = "art";
+        read-only;
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        macaddr_gmac1: macaddr_gmac1@0 {
+          reg = <0x0 0x6>;
+        };
+
+        macaddr_gmac2: macaddr_gmac2@6 {
+          reg = <0x6 0x6>;
+        };
+
+        pre_cal_24g: pre_cal_24g@...0 {
+          reg = <0x1000 0x2f20>;
+        };
+
+        pre_cal_5g: pre_cal_5g@...0{
+          reg = <0x5000 0x2f20>;
+        };
+      };
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            label = "bootloader";
+            reg = <0x000000 0x100000>;
+            read-only;
+        };
+
+        firmware@...000 {
+            compatible = "brcm,trx";
+            label = "firmware";
+            reg = <0x100000 0xe00000>;
+        };
+
+        calibration@...000 {
+            compatible = "nvmem-cells";
+            label = "calibration";
+            reg = <0xf00000 0x100000>;
+            ranges = <0 0xf00000 0x100000>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+
+            wifi0@0 {
+                reg = <0x000000 0x080000>;
+            };
+
+            wifi1@...00 {
+                reg = <0x080000 0x080000>;
+            };
+        };
+    };
-- 
2.30.0