netdev - Re: [PATCH v3 06/14] arm64: dts: qcom: lemans-evk: Add EEPROM and nvmem layout

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Message-ID: <e1c593d2-603c-4c3f-850a-07c14467b8e9@oss.qualcomm.com>
Date: Fri, 5 Sep 2025 14:07:50 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Wasim Nazir <wasim.nazir@....qualcomm.com>,
        Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Bartosz Golaszewski <brgl@...ev.pl>
Cc: kernel@....qualcomm.com, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, netdev@...r.kernel.org,
        linux-i2c@...r.kernel.org, Monish Chunara <quic_mchunara@...cinc.com>
Subject: Re: [PATCH v3 06/14] arm64: dts: qcom: lemans-evk: Add EEPROM and
 nvmem layout

On 9/4/25 6:39 PM, Wasim Nazir wrote:
> From: Monish Chunara <quic_mchunara@...cinc.com>
> 
> Integrate the GT24C256C EEPROM via I2C to enable access to
> board-specific non-volatile data.
> 
> Also, define an nvmem-layout to expose structured regions within the
> EEPROM, allowing consumers to retrieve configuration data such as
> Ethernet MAC addresses via the nvmem subsystem.
> 
> Signed-off-by: Monish Chunara <quic_mchunara@...cinc.com>
> Signed-off-by: Wasim Nazir <wasim.nazir@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/lemans-evk.dts | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/lemans-evk.dts b/arch/arm64/boot/dts/qcom/lemans-evk.dts
> index c48cb4267b72..30c3e5bead07 100644
> --- a/arch/arm64/boot/dts/qcom/lemans-evk.dts
> +++ b/arch/arm64/boot/dts/qcom/lemans-evk.dts
> @@ -319,6 +319,18 @@ expander3: gpio@3b {
>  		#gpio-cells = <2>;
>  		gpio-controller;
>  	};
> +
> +	eeprom@50 {
> +		compatible = "giantec,gt24c256c", "atmel,24c256";
> +		reg = <0x50>;
> +		pagesize = <64>;
> +
I'm not super happy that this would be the only line of defense, but
you probably want to add 'read-only' to the eeprom node (or not)

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad