NanoPi R4S has a EEPROM attached to the 2nd I2C bus (U92), which stores the MAC address. FriendlyElec ship two versions of the R4S [1]: The standard as well as the enterprise edition with only the enterprise edition including the EEPROM chip that stores the unique MAC address. 1. https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R4S#Differences_Between_R4S_Standard_Version_.26_R4S_Enterprise_Version Changes in v4: - Removed `mac-address` cell as it breaks the standard edition Changes in v3: - Added address-cells and size-cells 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@xxxxxxxxx> --- arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts index fe5b52610010..42c99573ab27 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts +++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts @@ -68,6 +68,17 @@ &emmc_phy { status = "disabled"; }; +&i2c2 { + eeprom@51 { + compatible = "microchip,24c02", "atmel,24c02"; + reg = <0x51>; + pagesize = <16>; + size = <256>; + #address-cells = <1>; + #size-cells = <1>; + }; +}; + &i2c4 { status = "disabled"; }; -- 2.25.1
