kernel: backport mtd commit converting partitions doc syntax

1. It's useful for developing & validating DTS files inside OpenWrt
2. This will allow backporting later changes that depend on it

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

2 files changed, 352 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/400-v5.8-dt-bindings-mtd-partition-Document-the-slc-mode-prop.patch b/target/linux/generic/backport-5.4/400-v5.8-dt-bindings-mtd-partition-Document-the-slc-mode-prop.patch
new file mode 100644
index 0000000000..7926843686
--- /dev/null
+++ b/target/linux/generic/backport-5.4/400-v5.8-dt-bindings-mtd-partition-Document-the-slc-mode-prop.patch
@@ -0,0 +1,28 @@
+From 422928a040fe17d17ded69c57903c7908423c7ef Mon Sep 17 00:00:00 2001
+From: Boris Brezillon <bbrezillon@kernel.org>
+Date: Sun, 3 May 2020 17:53:38 +0200
+Subject: [PATCH] dt-bindings: mtd: partition: Document the slc-mode property
+
+Add a boolean property to force a specific partition attached to an MLC
+NAND to be accessed in an emulated SLC mode this making this partition
+immune to paired-pages corruptions.
+
+Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20200503155341.16712-6-miquel.raynal@bootlin.com
+---
+ Documentation/devicetree/bindings/mtd/partition.txt | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/Documentation/devicetree/bindings/mtd/partition.txt
++++ b/Documentation/devicetree/bindings/mtd/partition.txt
+@@ -61,6 +61,9 @@ Optional properties:
+   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:
+ 
diff --git a/target/linux/generic/backport-5.4/401-v5.11-dt-bindings-mtd-convert-fixed-partitions-to-the-json.patch b/target/linux/generic/backport-5.4/401-v5.11-dt-bindings-mtd-convert-fixed-partitions-to-the-json.patch
new file mode 100644
index 0000000000..8aded43526
--- /dev/null
+++ b/target/linux/generic/backport-5.4/401-v5.11-dt-bindings-mtd-convert-fixed-partitions-to-the-json.patch
@@ -0,0 +1,324 @@
+From 04e9ab75267489224364fa510a88ada83e11c325 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 10 Dec 2020 18:23:52 +0100
+Subject: [PATCH] dt-bindings: mtd: convert "fixed-partitions" to the
+ json-schema
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+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.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Link: https://lore.kernel.org/r/20201210172352.31632-1-zajec5@gmail.com
+Signed-off-by: Rob Herring <robh@kernel.org>
+---
+ .../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
+
+--- a/Documentation/devicetree/bindings/mtd/partition.txt
++++ b/Documentation/devicetree/bindings/mtd/partition.txt
+@@ -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>;
+-			};
+-		};
+-	};
+-};
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
+@@ -0,0 +1,152 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/mtd/partitions/fixed-partitions.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: Fixed partitions
++
++description: |
++  This binding 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 node named "partitions". Partitions are then
++  defined as subnodes.
++
++maintainers:
++  - Rafał Miłecki <rafal@milecki.pl>
++
++properties:
++  compatible:
++    const: fixed-partitions
++
++  "#address-cells": true
++
++  "#size-cells": true
++
++patternProperties:
++  "@[0-9a-f]+$":
++    description: node describing a single flash partition
++    type: object
++
++    properties:
++      reg:
++        description: partition's offset and size within the flash
++        maxItems: 1
++
++      label:
++        description: The label / name for this partition. If omitted, the label
++          is taken from the node name (excluding the unit address).
++
++      read-only:
++        description: This parameter, if present, is a hint 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.
++        type: boolean
++
++      lock:
++        description: Do not unlock the partition at initialization time (not
++          supported on all devices)
++        type: boolean
++
++      slc-mode:
++        description: 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
++        type: boolean
++
++    required:
++      - reg
++
++required:
++  - "#address-cells"
++  - "#size-cells"
++
++additionalProperties: true
++
++examples:
++  - |
++    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>;
++        };
++    };
++  - |
++    partitions {
++        compatible = "fixed-partitions";
++        #address-cells = <1>;
++        #size-cells = <2>;
++
++        /* a 4 GiB partition */
++        partition@0 {
++            label = "filesystem";
++            reg = <0x00000000 0x1 0x00000000>;
++        };
++    };
++  - |
++    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>;
++        };
++    };
++  - |
++    partitions {
++        compatible = "fixed-partitions";
++        #address-cells = <1>;
++        #size-cells = <1>;
++
++        partition@0 {
++            label = "bootloader";
++            reg = <0x000000 0x100000>;
++            read-only;
++        };
++
++        firmware@100000 {
++            compatible = "brcm,trx";
++            label = "firmware";
++            reg = <0x100000 0xe00000>;
++        };
++
++        calibration@f00000 {
++            compatible = "fixed-partitions";
++            label = "calibration";
++            reg = <0xf00000 0x100000>;
++            ranges = <0 0xf00000 0x100000>;
++            #address-cells = <1>;
++            #size-cells = <1>;
++
++            partition@0 {
++                label = "wifi0";
++                reg = <0x000000 0x080000>;
++            };
++
++            partition@80000 {
++                label = "wifi1";
++                reg = <0x080000 0x080000>;
++            };
++        };
++    };