diff options
| author | Rafał Miłecki <rafal@milecki.pl> | 2022-10-22 23:13:17 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2022-11-07 17:14:17 +0100 |
| commit | 2b9a31d762f0441ab87cb76524c005adf54d6719 (patch) | |
| tree | d02e8f7f6eb8336001e6bd6cd372cb9311ecbf18 /Documentation/devicetree | |
| parent | 895d68a39481a75c680aa421546931fb11942fa6 (diff) | |
dt-bindings: mtd: partitions: support marking rootfs partition
Linux needs to know what to use as root device. On embedded devices with
flash the only common way to specify that is cmdline & root= parameter.
That solution works with U-Boot which is Linux & cmdline aware but isn't
available with all market bootloaders. Also that method is fragile:
1. Requires specific probing order on multi-flash devices
2. Uses hardcoded partitions indexes
A lot of devices use different partitioning methods. It may be
"fixed-partitions" or some dynamic partitioning (e.g. based on parts
table). For such cases allow "linux,rootfs" property to mark correct
flash partition.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221022211318.32009-1-zajec5@gmail.com
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml | 1 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/partitions/partition.yaml | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml index ad3ccd250802..d66a6e3bcb56 100644 --- a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml +++ b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml @@ -84,6 +84,7 @@ examples: partition@0 { label = "filesystem"; reg = <0x00000000 0x1 0x00000000>; + linux,rootfs; }; }; diff --git a/Documentation/devicetree/bindings/mtd/partitions/partition.yaml b/Documentation/devicetree/bindings/mtd/partitions/partition.yaml index f1a02d840b12..a25cd23a34c0 100644 --- a/Documentation/devicetree/bindings/mtd/partitions/partition.yaml +++ b/Documentation/devicetree/bindings/mtd/partitions/partition.yaml @@ -52,6 +52,10 @@ properties: immune to paired-pages corruptions type: boolean + linux,rootfs: + description: Marks partition that contains root filesystem to mount and boot + user space from + if: not: required: [ reg ] |