Hi Heiko, On Tue, Sep 13, 2022 at 6:22 PM Heiko Stuebner <heiko@xxxxxxxxx> wrote: > > 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. > Got it, thank you! I will do it these days. Regards, Tianling. > > 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"; > > }; > > > > > >
