[PATCH v7 1/9] dt-bindings: mmc: Document fixed-layout NVMEM provider support
From: Loic Poulain <loic.poulain@oss.qualcomm.com>
Date: 2026-07-01 16:00:41
Also in:
linux-arm-msm, linux-block, linux-bluetooth, linux-devicetree, linux-mmc, linux-wireless, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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. Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com> --- .../devicetree/bindings/mmc/mmc-card.yaml | 23 +++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/mmc/mmc-card.yaml b/Documentation/devicetree/bindings/mmc/mmc-card.yaml
index a61d6c96df759102f9c1fbfd548b026a77921cae..0422894508478c8d0ca68292b58a5fdbee218358 100644
--- a/Documentation/devicetree/bindings/mmc/mmc-card.yaml
+++ b/Documentation/devicetree/bindings/mmc/mmc-card.yaml@@ -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>; + }; + }; }; };
--
2.34.1