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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-67b88a4d99esm3109690a12.31.2026.05.04.01.04.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 May 2026 01:04:41 -0700 (PDT) Message-ID: Date: Mon, 4 May 2026 10:04:38 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: qcom: sc8280xp-blackrock: switch to uefi rtc offset To: jens.glathe@oldschoolsolutions.biz, Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold References: <20260501-blackrock-rtc-v1-1-bddf3e37fa94@oldschoolsolutions.biz> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260501-blackrock-rtc-v1-1-bddf3e37fa94@oldschoolsolutions.biz> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: rlE8GSp7AET-WOCRouuuvkGQjzGHiMUy X-Proofpoint-GUID: rlE8GSp7AET-WOCRouuuvkGQjzGHiMUy X-Authority-Analysis: v=2.4 cv=QY5WeMbv c=1 sm=1 tr=0 ts=69f8531b cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=VwQbUJbxAAAA:8 a=gxl3bz0cAAAA:8 a=EUspDBNiAAAA:8 a=VL2iTB8cqDA4uMkxVQgA:9 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 a=kiRiLd-pWN9FGgpmzFdl:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA0MDA4NiBTYWx0ZWRfX9EbRG6oN3+gt nGat3i2dHRxQRDYyXpvd0WkYdARE0Ymc+44P6Nivx+WQ350+P6XRfTfNSH2CcbVM5K7my3UPA6I 0rWQuUe0hyx+NQYrSywRq8yc4kM6ffZScjaq53QPFX2frCLimyIcWNYEgcL0xkza2mj4P1biDfW 4TWx5841YE+tRXu1lecOaaKJtCNM3yPfo9AO3wXWIdxop+ndDMnBfoxpD6+31Zw2MiFAGY6Rnn5 IfVeaVAkCDn1FG+Z3UxOdPn2w30vsplKqdzxYjOf51Z1/oAMpxw+Cn4gsGSK5ThtOPjtkKj6Npo N/oLLVXqH3zzzAO8x3zzVEh6uGAZokf1dZ0GZsXpbXvOdI1CKK8TwAJtdbeezb57EpV9Y12CLyg /tFD/yW5Ss6k1j+sl/3avKTAByfJCpOy0uyifKWI2hCy91Z/5lwA8UzbN97kgp01qznP14dTpxu 8txUnFj+c7CWO41tDKA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-04_03,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 phishscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 clxscore=1015 adultscore=0 priorityscore=1501 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605040086 On 5/1/26 11:11 AM, Jens Glathe via B4 Relay wrote: > From: Jens Glathe > > On many Qualcomm platforms the PMIC RTC control and time registers are > read-only so that the RTC time can not be updated. Instead an offset > needs be stored in some machine-specific non-volatile memory, which a > driver can take into account. > > On platforms where the offset is stored in a Qualcomm specific UEFI > variable the variables are also accessed in a non-standard way, which > means that the OS cannot assume that the variable service is available > by the time the RTC driver probes. > > Use the new 'qcom,uefi-rtc-info' property to indicate that the offset is > stored in a UEFI variable so that the OS can determine whether to wait > for it to become available. > > [1]: https://lore.kernel.org/r/20250423075143.11157-4-johan+linaro@kernel.org > > Fixes: 16a7fed11714 ("arm64: dts: qcom: sc8280xp-blackrock: dt definition for WDK2023") > > Signed-off-by: Jens Glathe > --- Reviewed-by: Konrad Dybcio Konrad