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* [PATCH 1/2] dt-bindings: mtd: partitions: add binding for U-Boot bootloader
@ 2022-07-11 15:30 Rafał Miłecki
  2022-07-11 15:30 ` [PATCH 2/2] mtd: parsers: add Broadcom's U-Boot parser Rafał Miłecki
                   ` (2 more replies)
  0 siblings, 3 replies; 5+ messages in thread
From: Rafał Miłecki @ 2022-07-11 15:30 UTC (permalink / raw)
  To: Rob Herring, Krzysztof Kozlowski, Miquel Raynal,
	Richard Weinberger, Vignesh Raghavendra
  Cc: linux-mtd, devicetree, linux-kernel, u-boot,
	bcm-kernel-feedback-list, Rafał Miłecki

From: Rafał Miłecki <rafal@milecki.pl>

Right now there is no (known) real reason for a custom binding for
standard U-Boot partitions. Broadcom's U-Boot however requires extra
handling - looking for environment variables subblocks. This commit adds
Broadcom specific binding.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
 .../bindings/mtd/partitions/u-boot.yaml       | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml

diff --git a/Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml b/Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml
new file mode 100644
index 000000000000..8a88e7d16524
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/partitions/u-boot.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: U-Boot bootloader partition
+
+description: |
+  U-Boot is a bootlodaer commonly used in embedded devices. It's almost always
+  located on some kind of flash device.
+
+  Device configuration is stored as a set of environment variables that are
+  located in a (usually standalone) block of data.
+
+maintainers:
+  - Rafał Miłecki <rafal@milecki.pl>
+
+allOf:
+  - $ref: partition.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: brcm,u-boot
+        description: |
+          Broadcom stores environment variables inside a U-Boot partition. They
+          can be identified by a custom header with magic value.
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            compatible = "brcm,u-boot";
+            reg = <0x0 0x100000>;
+            label = "u-boot";
+        };
+
+        partition@100000 {
+            reg = <0x100000 0x1ff00000>;
+            label = "firmware";
+        };
+    };
-- 
2.34.1


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^ permalink raw reply related	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2022-09-19 16:21 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-07-11 15:30 [PATCH 1/2] dt-bindings: mtd: partitions: add binding for U-Boot bootloader Rafał Miłecki
2022-07-11 15:30 ` [PATCH 2/2] mtd: parsers: add Broadcom's U-Boot parser Rafał Miłecki
2022-09-19 16:20   ` Miquel Raynal
2022-07-18 19:15 ` [PATCH 1/2] dt-bindings: mtd: partitions: add binding for U-Boot bootloader Rob Herring
2022-09-19 16:20 ` Miquel Raynal

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