# \[RFC v3 7/9\] MIPS: DTS: CI20: make DM9000 Ethernet controller use NVMEM to find the default MAC address

- From: H. Nikolaus Schaller \<hidden\>
- Date: 2020-02-16 19:21:27 
- List: linux-devicetree
- Page: https://ratatoskr.run/linux-devicetree/2020/02/5864418
- Thread: https://ratatoskr.run/linux-devicetree/2020/02/5864415/t.md

```text
There is a default MAC address factory programmed into
the eFuses of the JZ4780 chip. By using this every CI20
board has an individual but stable MAC address and DHCP
can assing stable IP addresses.

Signed-off-by: H. Nikolaus Schaller <redacted>
---
 arch/mips/boot/dts/ingenic/ci20.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
index 1166f3203ff8..63b4b53b5df5 100644
--- a/arch/mips/boot/dts/ingenic/ci20.dts
+++ b/arch/mips/boot/dts/ingenic/ci20.dts
@@ -428,6 +428,9 @@ Optional input supply properties:
 
 		interrupt-parent = <&gpe>;
 		interrupts = <19 4>;
+
+		nvmem-cells = <&eth0_addr>;
+		nvmem-cell-names = "mac-address";
 	};
 };
 
-- 
2.23.0

```