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dt-bindings: mtd: convert "fixed-partitions" to the json-schema

PATCH Applied Rafał Miłecki 2 participants 2 messages Dec 10, 2020 – Dec 11, 2020

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PATCH v2 1/1 dt-bindings: mtd: convert "fixed-partitions" to the json-schema

From: Rafał Miłecki <[email protected]>

This standardizes its documentation, allows validating with Makefile checks and helps writing DTS files.

Noticeable changes:
1. Dropped "Partitions can be represented by sub-nodes of a flash device." as we also support subpartitions (don't have to be part of flash device node)
2. Dropped "to Linux" as bindings are meant to be os agnostic.

---
V2: Add #address-cells and #size-cells
Move "compatible =" property up in examples
Add minItems to the "reg"

---
 .../devicetree/bindings/mtd/partition.txt     | 131 +--------------
 .../mtd/partitions/fixed-partitions.yaml      | 152 ++++++++++++++++++
 2 files changed, 154 insertions(+), 129 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
Documentation/devicetree/bindings/mtd/partition.txt +2 -129
index 4a39698221a2..ead90e8274d6 100644
@@ -24,137 +24,10 @@ another partitioning method.
 Available bindings are listed in the "partitions" subdirectory.
 
 
-Fixed Partitions
-================
-
-Partitions can be represented by sub-nodes of a flash device. This can be used
-on platforms which have strong conventions about which portions of a flash are
-used for what purposes, but which don't use an on-flash partition table such
-as RedBoot.
-
-The partition table should be a subnode of the flash node and should be named
-'partitions'. This node should have the following property:
-- compatible : (required) must be "fixed-partitions"
-Partitions are then defined in subnodes of the partitions node.
+Deprecated: partitions defined in flash node
+============================================
 
 For backwards compatibility partitions as direct subnodes of the flash device are
 supported. This use is discouraged.
 NOTE: also for backwards compatibility, direct subnodes that have a compatible
 string are not considered partitions, as they may be used for other bindings.
-
-#address-cells & #size-cells must both be present in the partitions subnode of the
-flash device. There are two valid values for both:
-<1>: for partitions that require a single 32-bit cell to represent their
-     size/address (aka the value is below 4 GiB)
-<2>: for partitions that require two 32-bit cells to represent their
-     size/address (aka the value is 4 GiB or greater).
-
-Required properties:
-- reg : The partition's offset and size within the flash
-
-Optional properties:
-- label : The label / name for this partition.  If omitted, the label is taken
-  from the node name (excluding the unit address).
-- read-only : This parameter, if present, is a hint to Linux that this
-  partition should only be mounted read-only. This is usually used for flash
-  partitions containing early-boot firmware images or data which should not be
-  clobbered.
-- lock : Do not unlock the partition at initialization time (not supported on
-  all devices)
-- slc-mode: This parameter, if present, allows one to emulate SLC mode on a
-  partition attached to an MLC NAND thus making this partition immune to
-  paired-pages corruptions
-
-Examples:
-
-
-flash@0 {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		partition@0 {
-			label = "u-boot";
-			reg = <0x0000000 0x100000>;
-			read-only;
-		};
-
-		uimage@100000 {
-			reg = <0x0100000 0x200000>;
-		};
-	};
-};
-
-flash@1 {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <2>;
-
-		/* a 4 GiB partition */
-		partition@0 {
-			label = "filesystem";
-			reg = <0x00000000 0x1 0x00000000>;
-		};
-	};
-};
-
-flash@2 {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <2>;
-		#size-cells = <2>;
-
-		/* an 8 GiB partition */
-		partition@0 {
-			label = "filesystem #1";
-			reg = <0x0 0x00000000 0x2 0x00000000>;
-		};
-
-		/* a 4 GiB partition */
-		partition@200000000 {
-			label = "filesystem #2";
-			reg = <0x2 0x00000000 0x1 0x00000000>;
-		};
-	};
-};
-
-flash@3 {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		partition@0 {
-			label = "bootloader";
-			reg = <0x000000 0x100000>;
-			read-only;
-		};
-
-		firmware@100000 {
-			label = "firmware";
-			reg = <0x100000 0xe00000>;
-			compatible = "brcm,trx";
-		};
-
-		calibration@f00000 {
-			label = "calibration";
-			reg = <0xf00000 0x100000>;
-			compatible = "fixed-partitions";
-			ranges = <0 0xf00000 0x100000>;
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			partition@0 {
-				label = "wifi0";
-				reg = <0x000000 0x080000>;
-			};
-
-			partition@80000 {
-				label = "wifi1";
-				reg = <0x080000 0x080000>;
-			};
-		};
-	};
-};
Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml new file +152 -0

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2.26.2


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#1 lore raw
Quoted 16 lines · Rafał Miłecki

From: Rafał Miłecki <[email protected]>

This standardizes its documentation, allows validating with Makefile checks and helps writing DTS files.

Noticeable changes:
1. Dropped "Partitions can be represented by sub-nodes of a flash device." as we also support subpartitions (don't have to be part of flash device node)
2. Dropped "to Linux" as bindings are meant to be os agnostic.

---
V2: Add #address-cells and #size-cells
Move "compatible =" property up in examples
Add minItems to the "reg"

Quoted 6 lines
---
 .../devicetree/bindings/mtd/partition.txt     | 131 +--------------
 .../mtd/partitions/fixed-partitions.yaml      | 152 ++++++++++++++++++
 2 files changed, 154 insertions(+), 129 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml

Applied, thanks!

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Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/