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From 2fa7294175c76e1ec568aa75c1891fd908728c8d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Fri, 12 Mar 2021 14:49:18 +0100
Subject: [PATCH] dt-bindings: mtd: add binding for Linksys Northstar
partitions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Linksys on Broadcom Northstar devices uses fixed flash layout with
multiple firmware partitions.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210312134919.7767-1-zajec5@gmail.com
---
.../mtd/partitions/linksys,ns-partitions.yaml | 74 +++++++++++++++++++
1 file changed, 74 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mtd/partitions/linksys,ns-partitions.yaml
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/partitions/linksys,ns-partitions.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/partitions/linksys,ns-partitions.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Linksys Northstar partitioning
+
+description: |
+ Linksys devices based on Broadcom Northstar architecture often use 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@milecki.pl>
+
+properties:
+ compatible:
+ const: linksys,ns-partitions
+
+ "#address-cells":
+ enum: [ 1, 2 ]
+
+ "#size-cells":
+ enum: [ 1, 2 ]
+
+patternProperties:
+ "^partition@[0-9a-f]+$":
+ $ref: "partition.yaml#"
+ properties:
+ compatible:
+ items:
+ - const: linksys,ns-firmware
+ - const: brcm,trx
+ unevaluatedProperties: false
+
+required:
+ - "#address-cells"
+ - "#size-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ partitions {
+ compatible = "linksys,ns-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "boot";
+ reg = <0x0 0x100000>;
+ read-only;
+ };
+
+ partition@100000 {
+ label = "nvram";
+ reg = <0x100000 0x100000>;
+ };
+
+ partition@200000 {
+ compatible = "linksys,ns-firmware", "brcm,trx";
+ reg = <0x200000 0xf00000>;
+ };
+
+ partition@1100000 {
+ compatible = "linksys,ns-firmware", "brcm,trx";
+ reg = <0x1100000 0xf00000>;
+ };
+ };
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