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0c7340f0a2
This patch has been added to 5.4, but not been copied to 5.10:
7495acb555 ("kernel: backport mtd commit converting partitions doc syntax")
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
325 lines
9.0 KiB
Diff
325 lines
9.0 KiB
Diff
From 04e9ab75267489224364fa510a88ada83e11c325 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Thu, 10 Dec 2020 18:23:52 +0100
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Subject: [PATCH] dt-bindings: mtd: convert "fixed-partitions" to the
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json-schema
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This standardizes its documentation, allows validating with Makefile
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checks and helps writing DTS files.
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Noticeable changes:
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1. Dropped "Partitions can be represented by sub-nodes of a flash
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device." as we also support subpartitions (don't have to be part of
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flash device node)
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2. Dropped "to Linux" as bindings are meant to be os agnostic.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Link: https://lore.kernel.org/r/20201210172352.31632-1-zajec5@gmail.com
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Signed-off-by: Rob Herring <robh@kernel.org>
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---
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.../devicetree/bindings/mtd/partition.txt | 131 +--------------
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.../mtd/partitions/fixed-partitions.yaml | 152 ++++++++++++++++++
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2 files changed, 154 insertions(+), 129 deletions(-)
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create mode 100644 Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
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--- a/Documentation/devicetree/bindings/mtd/partition.txt
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+++ b/Documentation/devicetree/bindings/mtd/partition.txt
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@@ -24,137 +24,10 @@ another partitioning method.
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Available bindings are listed in the "partitions" subdirectory.
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-Fixed Partitions
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-================
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-
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-Partitions can be represented by sub-nodes of a flash device. This can be used
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-on platforms which have strong conventions about which portions of a flash are
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-used for what purposes, but which don't use an on-flash partition table such
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-as RedBoot.
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-
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-The partition table should be a subnode of the flash node and should be named
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-'partitions'. This node should have the following property:
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-- compatible : (required) must be "fixed-partitions"
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-Partitions are then defined in subnodes of the partitions node.
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+Deprecated: partitions defined in flash node
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+============================================
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For backwards compatibility partitions as direct subnodes of the flash device are
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supported. This use is discouraged.
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NOTE: also for backwards compatibility, direct subnodes that have a compatible
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string are not considered partitions, as they may be used for other bindings.
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-
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-#address-cells & #size-cells must both be present in the partitions subnode of the
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-flash device. There are two valid values for both:
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-<1>: for partitions that require a single 32-bit cell to represent their
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- size/address (aka the value is below 4 GiB)
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-<2>: for partitions that require two 32-bit cells to represent their
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- size/address (aka the value is 4 GiB or greater).
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-
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-Required properties:
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-- reg : The partition's offset and size within the flash
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-
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-Optional properties:
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-- label : The label / name for this partition. If omitted, the label is taken
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- from the node name (excluding the unit address).
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-- read-only : This parameter, if present, is a hint to Linux that this
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- partition should only be mounted read-only. This is usually used for flash
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- partitions containing early-boot firmware images or data which should not be
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- clobbered.
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-- lock : Do not unlock the partition at initialization time (not supported on
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- all devices)
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-- slc-mode: This parameter, if present, allows one to emulate SLC mode on a
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- partition attached to an MLC NAND thus making this partition immune to
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- paired-pages corruptions
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-
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-Examples:
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-
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-
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-flash@0 {
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- partitions {
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- compatible = "fixed-partitions";
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- #address-cells = <1>;
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- #size-cells = <1>;
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-
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- partition@0 {
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- label = "u-boot";
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- reg = <0x0000000 0x100000>;
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- read-only;
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- };
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-
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- uimage@100000 {
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- reg = <0x0100000 0x200000>;
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- };
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- };
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-};
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-
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-flash@1 {
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- partitions {
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- compatible = "fixed-partitions";
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- #address-cells = <1>;
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- #size-cells = <2>;
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-
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- /* a 4 GiB partition */
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- partition@0 {
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- label = "filesystem";
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- reg = <0x00000000 0x1 0x00000000>;
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- };
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- };
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-};
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-
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-flash@2 {
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- partitions {
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- compatible = "fixed-partitions";
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- #address-cells = <2>;
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- #size-cells = <2>;
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-
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- /* an 8 GiB partition */
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- partition@0 {
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- label = "filesystem #1";
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- reg = <0x0 0x00000000 0x2 0x00000000>;
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- };
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-
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- /* a 4 GiB partition */
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- partition@200000000 {
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- label = "filesystem #2";
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- reg = <0x2 0x00000000 0x1 0x00000000>;
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- };
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- };
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-};
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-
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-flash@3 {
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- partitions {
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- compatible = "fixed-partitions";
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- #address-cells = <1>;
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- #size-cells = <1>;
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-
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- partition@0 {
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- label = "bootloader";
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- reg = <0x000000 0x100000>;
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- read-only;
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- };
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-
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- firmware@100000 {
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- label = "firmware";
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- reg = <0x100000 0xe00000>;
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- compatible = "brcm,trx";
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- };
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-
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- calibration@f00000 {
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- label = "calibration";
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- reg = <0xf00000 0x100000>;
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- compatible = "fixed-partitions";
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- ranges = <0 0xf00000 0x100000>;
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- #address-cells = <1>;
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- #size-cells = <1>;
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-
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- partition@0 {
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- label = "wifi0";
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- reg = <0x000000 0x080000>;
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- };
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-
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- partition@80000 {
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- label = "wifi1";
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- reg = <0x080000 0x080000>;
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- };
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- };
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- };
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-};
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
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@@ -0,0 +1,152 @@
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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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+%YAML 1.2
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+---
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+$id: http://devicetree.org/schemas/mtd/partitions/fixed-partitions.yaml#
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+$schema: http://devicetree.org/meta-schemas/core.yaml#
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+
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+title: Fixed partitions
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+
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+description: |
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+ This binding can be used on platforms which have strong conventions about
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+ which portions of a flash are used for what purposes, but which don't use an
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+ on-flash partition table such as RedBoot.
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+
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+ The partition table should be a node named "partitions". Partitions are then
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+ defined as subnodes.
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+
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+maintainers:
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+ - Rafał Miłecki <rafal@milecki.pl>
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+
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+properties:
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+ compatible:
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+ const: fixed-partitions
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+
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+ "#address-cells": true
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+
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+ "#size-cells": true
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+
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+patternProperties:
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+ "@[0-9a-f]+$":
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+ description: node describing a single flash partition
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+ type: object
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+
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+ properties:
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+ reg:
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+ description: partition's offset and size within the flash
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+ maxItems: 1
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+
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+ label:
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+ description: The label / name for this partition. If omitted, the label
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+ is taken from the node name (excluding the unit address).
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+
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+ read-only:
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+ description: This parameter, if present, is a hint that this partition
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+ should only be mounted read-only. This is usually used for flash
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+ partitions containing early-boot firmware images or data which should
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+ not be clobbered.
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+ type: boolean
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+
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+ lock:
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+ description: Do not unlock the partition at initialization time (not
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+ supported on all devices)
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+ type: boolean
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+
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+ slc-mode:
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+ description: This parameter, if present, allows one to emulate SLC mode
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+ on a partition attached to an MLC NAND thus making this partition
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+ immune to paired-pages corruptions
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+ type: boolean
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+
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+ required:
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+ - reg
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+
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+required:
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+ - "#address-cells"
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+ - "#size-cells"
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+
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+additionalProperties: true
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+
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+examples:
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+ - |
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+ partitions {
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+ compatible = "fixed-partitions";
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+ #address-cells = <1>;
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+ #size-cells = <1>;
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+
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+ partition@0 {
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+ label = "u-boot";
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+ reg = <0x0000000 0x100000>;
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+ read-only;
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+ };
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+
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+ uimage@100000 {
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+ reg = <0x0100000 0x200000>;
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+ };
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+ };
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+ - |
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+ partitions {
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+ compatible = "fixed-partitions";
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+ #address-cells = <1>;
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+ #size-cells = <2>;
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+
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+ /* a 4 GiB partition */
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+ partition@0 {
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+ label = "filesystem";
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+ reg = <0x00000000 0x1 0x00000000>;
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+ };
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+ };
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+ - |
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+ partitions {
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+ compatible = "fixed-partitions";
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+ #address-cells = <2>;
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+ #size-cells = <2>;
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+
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+ /* an 8 GiB partition */
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+ partition@0 {
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+ label = "filesystem #1";
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+ reg = <0x0 0x00000000 0x2 0x00000000>;
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+ };
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+
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+ /* a 4 GiB partition */
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+ partition@200000000 {
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+ label = "filesystem #2";
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+ reg = <0x2 0x00000000 0x1 0x00000000>;
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+ };
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+ };
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+ - |
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+ partitions {
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+ compatible = "fixed-partitions";
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+ #address-cells = <1>;
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+ #size-cells = <1>;
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+
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+ partition@0 {
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+ label = "bootloader";
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+ reg = <0x000000 0x100000>;
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+ read-only;
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+ };
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+
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+ firmware@100000 {
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+ compatible = "brcm,trx";
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+ label = "firmware";
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+ reg = <0x100000 0xe00000>;
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+ };
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+
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+ calibration@f00000 {
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+ compatible = "fixed-partitions";
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+ label = "calibration";
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+ reg = <0xf00000 0x100000>;
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+ ranges = <0 0xf00000 0x100000>;
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+ #address-cells = <1>;
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+ #size-cells = <1>;
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+
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+ partition@0 {
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+ label = "wifi0";
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+ reg = <0x000000 0x080000>;
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+ };
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+
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+ partition@80000 {
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+ label = "wifi1";
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+ reg = <0x080000 0x080000>;
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+ };
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+ };
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+ };
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