[PATCH 2/9] arm64: dts: qcom: arduino-imola: Describe boot1 NVMEM layout

Loic Poulain
2026-04-28T14:23:18Z

On Arduino Uno-Q, the eMMC boot1 partition is factory provisioned
with device-specific information such as the WiFi MAC address
and the Bluetooth BD address. This partition can serve as an
alternative to additional non-volatile memory, such as a
dedicated EEPROM.

The eMMC boot partitions are typically good candidates, as they
are realively small, read-only by default (and can be enforced
as hardware read-only), and are not affected by board reflashing
procedures, which generally target the eMMC user or GP partitions.

Describe the corresponding nvmem-layout for the WiFi and
Bluetooth addresses.

Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
arch/arm64/boot/dts/qcom/qrb2210-arduino-imola.dts | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qrb2210-arduino-imola.dts b/arch/arm64/boot/dts/qcom/qrb2210-arduino-imola.dts
index bf088fa9807f040f0c8f405f9111b01790b09377..dc85cf94f71cac8666cab30ccf37cc2d2f8fd941 100644
--- a/arch/arm64/boot/dts/qcom/qrb2210-arduino-imola.dts
+++ b/arch/arm64/boot/dts/qcom/qrb2210-arduino-imola.dts
@@ -409,7 +409,31 @@ &sdhc_1 {
no-sdio;
no-sd;

+ #address-cells = <1>;
+ #size-cells = <0>;
+
status = "okay";
+
+ card@0 {
+ compatible = "mmc-card";
+ reg = <0>;
+
+ partitions-boot1 {
+ nvmem-layout {
+ compatible = "fixed-layout";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ wifi_mac_addr: mac-addr@4400 {
+ reg = <0x4400 0x6>;
+ };
+
+ bd_addr: bd-addr@5400 {
+ reg = <0x5400 0x6>;
+ };
+ };
+ };
+ };
};

&spi5 {

--
2.34.1