[PATCH v2] arm64: dts: rockchip: add EEPROM node for NanoPi R4S

Tianling Shen
2021-06-10T09:50:08Z

NanoPi R4S has a EEPROM attached to the 2nd I2C bus (U92), which
stores the MAC address.

Changes in v2:
- Added the size of EEPROM
- Added `mac-address` cell to pass the MAC address to kernel
- Removed `read-only` property in EEPROM node

Signed-off-by: Tianling Shen <cnsztl@gmail.com>
---
.../boot/dts/rockchip/rk3399-nanopi-r4s.dts | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
index cef4d18b599d..50d3b11eb925 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
@@ -68,6 +68,24 @@
status = "disabled";
};

+&gmac {
+ nvmem-cells = <&mac_address>;
+ nvmem-cells-names = "mac-address";
+};
+
+&i2c2 {
+ eeprom@51 {
+ compatible = "microchip,24c02", "atmel,24c02";
+ reg = <0x51>;
+ pagesize = <16>;
+ size = <256>;
+
+ mac_address: mac-address@fa {
+ reg = <0xfa 0x06>;
+ };
+ };
+};
+
&i2c4 {
status = "disabled";
};
--
2.17.1