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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b0413ee67a3sm1405722666b.24.2025.09.05.05.07.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Sep 2025 05:07:53 -0700 (PDT) Message-ID: Date: Fri, 5 Sep 2025 14:07:50 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 06/14] arm64: dts: qcom: lemans-evk: Add EEPROM and nvmem layout To: Wasim Nazir , Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Richard Cochran , Bartosz Golaszewski Cc: kernel@oss.qualcomm.com, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org, linux-i2c@vger.kernel.org, Monish Chunara References: <20250904-lemans-evk-bu-v3-0-8bbaac1f25e8@oss.qualcomm.com> <20250904-lemans-evk-bu-v3-6-8bbaac1f25e8@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250904-lemans-evk-bu-v3-6-8bbaac1f25e8@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=Ycq95xRf c=1 sm=1 tr=0 ts=68bad29b cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=COk6AnOGAAAA:8 a=EUspDBNiAAAA:8 a=E-EgujyPmZ3s1dcs9ZUA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-GUID: IT5__N_IzkSEx1COyAYYB6rxQJYQDG_c X-Proofpoint-ORIG-GUID: IT5__N_IzkSEx1COyAYYB6rxQJYQDG_c X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTAxMDEwMSBTYWx0ZWRfXwAb3oD2X5EvA 13FC4+onplFIXl6k69IVAF3ykjNjOlkFRwgprsrDlgttTFI48kDs/dtbT+2UOaXX5GH02+HXC52 iYiPbLEhFuXW83Q9Qo57/AqgG4kPLcP+Q/yni+ctOCutD0CJwdv8maNJsNSoYe//vZjefWF3Zka RisaeQfkkEqS7tYI3kjysgyS7vdmELAX9WEAARe2un6al1TTVn/eaiUK9yV3l/O4ydpmlLBjJgL 9FX6g7VrERjaku7p2YwMdEsbTb01us4hHXj7P5FpdtyCEicwyIFTEYiNuXu0ALJRgKWAYZTstk1 LvlTe3atusF/UjzdYZUlhcCTqtO8BX6y3uuNcfmylGvuDL5thDa/YzGvOTw7YSDmKnEnL/XvD5t L9PuOO1U X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-05_03,2025-09-04_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 adultscore=0 phishscore=0 malwarescore=0 bulkscore=0 suspectscore=0 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509010101 On 9/4/25 6:39 PM, Wasim Nazir wrote: > From: Monish Chunara > > 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 > Signed-off-by: Wasim Nazir > --- > 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