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dt-bindings: mmc: Document fixed-layout NVMEM provider support

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Allow an eMMC hardware partition node to describe an NVMEM layout so the
partition can be exposed as an NVMEM provider. This lets a partition
(e.g. an eMMC boot partition) store device-specific information such as a
WiFi MAC address or a Bluetooth BD address and reference it through NVMEM
cells.

Accept "fixed-layout" as the partition node compatible, in addition to
"fixed-partitions", so the layout can be described directly on the
partition node.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
This commit is contained in:
Loic Poulain 2026-07-30 18:00:31 +02:00 committed by Ulf Hansson
parent f92c238425
commit b65a40521d
1 changed files with 22 additions and 1 deletions
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23
Documentation/devicetree/bindings/mmc/mmc-card.yaml
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@ -38,7 +38,9 @@ patternProperties:
properties:
compatible:
contains:
const: fixed-partitions
enum:
- fixed-partitions
- fixed-layout
required:
- compatible
@ -86,6 +88,25 @@ examples:
read-only;
};
};
partitions-boot2 {
compatible = "fixed-layout";
#address-cells = <1>;
#size-cells = <1>;
mac-addr@4400 {
compatible = "mac-base";
reg = <0x4400 0x6>;
#nvmem-cell-cells = <1>;
};
bd-addr@5400 {
compatible = "mac-base";
reg = <0x5400 0x6>;
#nvmem-cell-cells = <1>;
};
};
};
};