kernel: backport "ofpart" mtd parser upstream quirks support

This adds quirks support to the "ofpart" parser. It's required to
support fixed partitions that require some extra logic.

Right now only BCM4908 binding is supported (BCM4908 requires detecting
currently used "firmware" partition).

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

1 files changed, 115 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/402-v5.12-0001-dt-bindings-mtd-move-partition-binding-to-its-own-fi.patch b/target/linux/generic/backport-5.4/402-v5.12-0001-dt-bindings-mtd-move-partition-binding-to-its-own-fi.patch
new file mode 100644
index 0000000000..f3b1179ecd
--- /dev/null
+++ b/target/linux/generic/backport-5.4/402-v5.12-0001-dt-bindings-mtd-move-partition-binding-to-its-own-fi.patch
@@ -0,0 +1,115 @@
+From 6418522022c706fd867b00b2571edba48b8fa8c7 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 11 Feb 2021 23:04:25 +0100
+Subject: [PATCH] dt-bindings: mtd: move partition binding to its own file
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Single partition binding is quite common and may be:
+1. Used by multiple parsers
+2. Extended for more specific cases
+
+Move it to separated file to avoid code duplication.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Rob Herring <robh@kernel.org>
+Signed-off-by: Richard Weinberger <richard@nod.at>
+---
+ .../mtd/partitions/fixed-partitions.yaml      | 33 +------------
+ .../bindings/mtd/partitions/partition.yaml    | 47 +++++++++++++++++++
+ 2 files changed, 48 insertions(+), 32 deletions(-)
+ create mode 100644 Documentation/devicetree/bindings/mtd/partitions/partition.yaml
+
+--- a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
++++ b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
+@@ -27,38 +27,7 @@ properties:
+ 
+ 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
++    $ref: "partition.yaml#"
+ 
+ required:
+   - "#address-cells"
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mtd/partitions/partition.yaml
+@@ -0,0 +1,47 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/mtd/partitions/partition.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: Partition
++
++description: |
++  This binding describes a single flash partition. Each partition must have its
++  relative offset and size specified. Depending on partition function extra
++  properties can be used.
++
++maintainers:
++  - Rafał Miłecki <rafal@milecki.pl>
++
++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
++
++additionalProperties: true