[PATCH 08/12] arm64: dts: rockchip: describe mcu eeprom cells on rk3568-ts433

[Heiko Stuebner]

The MCU's eeprom contains the unit's serial and a number of slots for
mac-addresses. As the MCU seems to be used in different devices, up to
8 mac addresses can live there and the unused slots are actually
initialized with empty mac-address strings like 00:00:00:00:05:09 .

Interestingly on the TS-433, the PCIe ethernet adapter brings its own
memory to hold its mac, and the gmac0 is supposed to get its mac from
the second mac-slot, while the first one stays empty.

Signed-off-by: Heiko Stuebner <heiko at sntech.de>
Link: https://patch.msgid.link/20251112214206.423244-3-heiko@sntech.de

[ upstream commit: 81f116991433d2547d7f350873cb4511ebcd4fec ]

(cherry picked from commit 51b234a762b64dd4d8b1f338b4abbcf7cfc748a4)
---
 .../src/arm64/rockchip/rk3568-qnap-ts433.dts  | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/dts/upstream/src/arm64/rockchip/rk3568-qnap-ts433.dts b/dts/upstream/src/arm64/rockchip/rk3568-qnap-ts433.dts
index 5656554ca28..224db87973b 100644
--- a/dts/upstream/src/arm64/rockchip/rk3568-qnap-ts433.dts
+++ b/dts/upstream/src/arm64/rockchip/rk3568-qnap-ts433.dts
@@ -655,6 +655,68 @@
 			#cooling-cells = <2>;
 			cooling-levels = <0 64 89 128 166 204 221 238>;
 		};
+
+		nvmem-layout {
+			compatible = "fixed-layout";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			serial-number at 0 {
+				reg = <0x0 0x13>;
+			};
+
+			ext-port at 22 {
+				reg = <0x22 0x2>;
+			};
+
+			mac0: mac at 24 {
+				compatible = "mac-base";
+				reg = <0x24 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+
+			mac1: mac at 35 {
+				compatible = "mac-base";
+				reg = <0x35 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+
+			mac2: mac at 46 {
+				compatible = "mac-base";
+				reg = <0x46 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+
+			mac3: mac at 57 {
+				compatible = "mac-base";
+				reg = <0x57 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+
+			mac4: mac at 68 {
+				compatible = "mac-base";
+				reg = <0x68 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+
+			mac5: mac at 79 {
+				compatible = "mac-base";
+				reg = <0x79 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+
+			mac6: mac at 8a {
+				compatible = "mac-base";
+				reg = <0x8a 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+
+			mac7: mac at 9b {
+				compatible = "mac-base";
+				reg = <0x9b 0x11>;
+				#nvmem-cell-cells = <1>;
+			};
+		};
 	};
 };
 
-- 
2.47.2