linux-kernel - [PATCH 2/3] dt-bindings: mtd: add binding from BCM4908 partitions

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Message-Id: <20210115153901.31052-2-zajec5@gmail.com>
Date:   Fri, 15 Jan 2021 16:39:00 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Boris Brezillon <bbrezillon@...nel.org>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH 2/3] dt-bindings: mtd: add binding from BCM4908 partitions

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

BCM4908 uses fixed partitions layout but function of some partitions may
vary. Some devices use multiple firmware partitions and those should be
marked to let system discover their purpose.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 .../partitions/brcm,bcm4908-partitions.yaml   | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/partitions/brcm,bcm4908-partitions.yaml

diff --git a/Documentation/devicetree/bindings/mtd/partitions/brcm,bcm4908-partitions.yaml b/Documentation/devicetree/bindings/mtd/partitions/brcm,bcm4908-partitions.yaml
new file mode 100644
index 000000000000..4090b61a3da7
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/partitions/brcm,bcm4908-partitions.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/partitions/brcm,bcm4908-partitions.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM4908 partitioning
+
+description: |
+  Broadcom BCM4908 CFE bootloader supports two firmware partitions. One is used
+  for regular booting, the other is treated as fallback.
+
+  This binding allows defining all fixed partitions and marking those containing
+  firmware. System can use that information e.g. for booting or flashing
+  purposes.
+
+maintainers:
+  - Rafał Miłecki <rafal@...ecki.pl>
+
+properties:
+  compatible:
+    const: brcm,bcm4908-partitions
+
+  "#address-cells": true
+
+  "#size-cells": true
+
+patternProperties:
+  "@[0-9a-f]+$":
+    allOf:
+      - $ref: "partition.yaml#"
+      - properties:
+          compatible:
+            const: brcm,bcm4908-firmware
+
+required:
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    partitions {
+        compatible = "brcm,bcm4908-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            label = "cferom";
+            reg = <0x0 0x100000>;
+        };
+
+        partition@...000 {
+            compatible = "brcm,bcm4908-firmware";
+            reg = <0x100000 0xf00000>;
+        };
+
+        partition@...0000 {
+            compatible = "brcm,bcm4908-firmware";
+            reg = <0x1000000 0xf00000>;
+        };
+
+        partition@...0000 {
+            label = "calibration";
+            reg = <0x1f00000 0x100000>;
+        };
+    };
-- 
2.26.2