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

[Johan Jonker]

Hi Tianling,

On 6/7/21 10:17 AM, Tianling Shen wrote:
> NanoPi R4S has a EEPROM attached to the 2nd I2C bus (U92), which
> stores the MAC address.
> 
> Signed-off-by: Tianling Shen <cnsztl@xxxxxxxxx>
> ---
>  arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts | 9 +++++++++
>  1 file changed, 9 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..4a82f50a07c5 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
> @@ -68,6 +68,15 @@
>  	status = "disabled";
>  };
>  
> +&i2c2 {
> +	eeprom@51 {
> +		compatible = "microchip,24c02", "atmel,24c02";
> +		reg = <0x51>;
> +		pagesize = <16>;

> +		read-only; /* This holds our MAC */

The mainline dts files should be generic I think.
Any comment about "use", partitions or write ability should be avoided.
It's up the user.

Johan

> +	};
> +};
> +
>  &i2c4 {
>  	status = "disabled";
>  };
>