[PATCH v6 1/3] dt-bindings: mtd: partitions: Add binman compatible

Simon Glass
2023-10-25T21:06:54Z

Add a compatible string for binman, so we can extend fixed-partitions
in various ways.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

(no changes since v5)

Changes in v5:
- Add #address/size-cells and parternProperties
- Drop $ref to fixed-partitions.yaml
- Drop 'select: false'

Changes in v4:
- Change subject line

Changes in v3:
- Drop fixed-partition additional compatible string
- Drop fixed-partitions from the example
- Mention use of compatible instead of label

Changes in v2:
- Drop mention of 'enhanced features' in fixed-partitions.yaml
- Mention Binman input and output properties
- Use plain partition@xxx for the node name

.../bindings/mtd/partitions/binman.yaml | 68 +++++++++++++++++++
.../bindings/mtd/partitions/partitions.yaml | 1 +
MAINTAINERS | 5 ++
3 files changed, 74 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mtd/partitions/binman.yaml

diff --git a/Documentation/devicetree/bindings/mtd/partitions/binman.yaml b/Documentation/devicetree/bindings/mtd/partitions/binman.yaml
new file mode 100644
index 000000000000..329217550a98
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/partitions/binman.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Google LLC
+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/partitions/binman.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Binman firmware layout
+
+maintainers:
+ - Simon Glass <sjg@chromium.org>
+
+description: |
+ The binman node provides a layout for firmware, used when packaging firmware
+ from multiple projects. It is based on fixed-partitions, with some
+ extensions, but uses 'compatible' to indicate the contents of the node, to
+ avoid perturbing or confusing existing installations which use 'label' for a
+ particular purpose.
+
+ Binman supports properties used as inputs to the firmware-packaging process,
+ such as those which control alignment of partitions. This binding addresses
+ these 'input' properties. For example, it is common for the 'reg' property
+ (an 'output' property) to be set by Binman, based on the alignment requested
+ in the input.
+
+ Once processing is complete, input properties have mostly served their
+ purpose, at least until the firmware is repacked later, e.g. due to a
+ firmware update. The 'fixed-partitions' binding should provide enough
+ information to read the firmware at runtime, including decompression if
+ needed.
+
+ Documentation for Binman is available at:
+
+ https://u-boot.readthedocs.io/en/latest/develop/package/binman.html
+
+ with the current image-description format at:
+
+ https://u-boot.readthedocs.io/en/latest/develop/package/binman.html#image-description-format
+
+properties:
+ compatible:
+ const: binman
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 1
+
+patternProperties:
+ "^partition(-.+|@[0-9a-f]+)$":
+ $ref: partition.yaml
+
+additionalProperties: false
+
+examples:
+ - |
+ partitions {
+ compatible = "binman";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@100000 {
+ label = "u-boot";
+ reg = <0x100000 0xf00000>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/mtd/partitions/partitions.yaml b/Documentation/devicetree/bindings/mtd/partitions/partitions.yaml
index 1dda2c80747b..849fd15d085c 100644
--- a/Documentation/devicetree/bindings/mtd/partitions/partitions.yaml
+++ b/Documentation/devicetree/bindings/mtd/partitions/partitions.yaml
@@ -15,6 +15,7 @@ maintainers:

oneOf:
- $ref: arm,arm-firmware-suite.yaml
+ - $ref: binman.yaml
- $ref: brcm,bcm4908-partitions.yaml
- $ref: brcm,bcm947xx-cfe-partitions.yaml
- $ref: fixed-partitions.yaml
diff --git a/MAINTAINERS b/MAINTAINERS
index 2d13bbd69adb..b9441eec979a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3542,6 +3542,11 @@ F: Documentation/filesystems/bfs.rst
F: fs/bfs/
F: include/uapi/linux/bfs_fs.h

+BINMAN
+M: Simon Glass <sjg@chromium.org>
+S: Supported
+F: Documentation/devicetree/bindings/mtd/partitions/binman*
+
BITMAP API
M: Yury Norov <yury.norov@gmail.com>
R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
--
2.42.0.758.gaed0368e0e-goog