| Message ID | 20221022211318.32009-1-zajec5@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [V3,1/2] dt-bindings: mtd: partitions: support marking rootfs partition | expand |
On Sat, 22 Oct 2022 23:13:17 +0200, Rafał Miłecki wrote: > From: Rafał Miłecki <rafal@milecki.pl> > > 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> > --- > V2: Use "linux,rootfs" as more accurate. Thanks Rob. > --- > .../devicetree/bindings/mtd/partitions/fixed-partitions.yaml | 1 + > .../devicetree/bindings/mtd/partitions/partition.yaml | 4 ++++ > 2 files changed, 5 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
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 ]