Hi, Am Sonntag, 11. September 2022, 06:06:28 CEST schrieb Tianling Shen: > 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. This needs to go differently. If the eeprom is only preset on the enterprise-version, you need a separate devicetree for it, that provides the eeprom node. Declaring the eeprom "in error" on a device that doesn't have it, isn't the way to go. Look for example at rockchip/rk3399-nanopi-m4b.dts for reference on how to do it - and also remember to add the new binding for that board. And can also again declare the correct mac-address cell. Heiko > > 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"; > }; >
