From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4207E26D4FB; Wed, 23 Apr 2025 07:54:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745394841; cv=none; b=ADFLIyUa50bJ1UtgrbBSm6T6RLtR+H6UcSEaSA8OvewJ7MhCFy6b3tbVHFDmEgVbRZqM48pZof8X1in0X4kWdhXwaSRyXQo7XtrmzxW6l5GgHALul+9Bxb3HRyRlVI1sS87Uj8NqTlp30uBMa66LmQ0j3KoM8Y4Py2BalAGSBmA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745394841; c=relaxed/simple; bh=Ukky07QaiK/F5NoV7jqIANfFkmUJy5PKAuULzk2Aq+s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TEDUzoDQtnc21K6cKoPVDFF2a9SBREb+oaoIbV2h4tPYSeoUkb32rWEf8s1vBlJnnA0gcDRcn7YN05+FTWx0FdLhR2eGt41n+zzzqWuv8Pf9evcbkDBuCfK2jNd1i1KTdFJK2qqjOJal3ZUZnIqmsxRTykXNm7c6cuKOLLCDTDM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jJgexmis; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jJgexmis" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C13E1C4AF09; Wed, 23 Apr 2025 07:54:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745394840; bh=Ukky07QaiK/F5NoV7jqIANfFkmUJy5PKAuULzk2Aq+s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jJgexmislfGDHY8SCZBzo52qn9W6DZqU50ME4zPgsTc151AE5OkQ3CvDAxEEYqDnK JUWww1MO8MMw+infSBZFnX4XOT07dDr11pRfTPuQJ7/+34pkYbgB8j31Dx+lsdby8S QcXkKQ446gHcPykLiuxRLTgLww7UncJQ4R/rBE8RjTBAvbnGVhcLs11eE7mrAJ6LuM uE6Yavch5ZbCFIuGg9NfWxTx3hbBDQ/yUhZxdpiY5tpEBaXgw/iCifw7jNkHLnzHyc sHlIzXRshIPD7iZi2xVSJ/Gq+N1Nz6Nia3ZpBdaPno5n1dEe9yegll1EI2MK2K8JWY EVF/xe5cLduYg== Received: from johan by xi.lan with local (Exim 4.97.1) (envelope-from ) id 1u7Uvf-000000002xD-1Ysi; Wed, 23 Apr 2025 09:53:59 +0200 From: Johan Hovold To: Alexandre Belloni , Bjorn Andersson Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Konrad Dybcio , linux-arm-msm@vger.kernel.org, linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH 1/4] dt-bindings: rtc: qcom-pm8xxx: add uefi-variable offset Date: Wed, 23 Apr 2025 09:51:40 +0200 Message-ID: <20250423075143.11157-2-johan+linaro@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250423075143.11157-1-johan+linaro@kernel.org> References: <20250423075143.11157-1-johan+linaro@kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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. Add a 'qcom,uefi-rtc-info' boolean flag to indicate that the RTC offset is stored in a Qualcomm specific UEFI variable so that the OS can determine whether to wait for it to become available. The UEFI variable is 882f8c2b-9646-435f-8de5-f208ff80c1bd-RTCInfo and holds a 12-byte structure where the first four bytes is a GPS time offset in little-endian byte order. Link: https://lore.kernel.org/all/aAecIkgmTTlThKEZ@hovoldconsulting.com/ Signed-off-by: Johan Hovold --- Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml index 68ef3208c886..7497dc3ac5b2 100644 --- a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml +++ b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml @@ -55,6 +55,12 @@ properties: description: RTC alarm is not owned by the OS + qcom,uefi-rtc-info: + type: boolean + description: + RTC offset is stored as a four-byte GPS time offset in a 12-byte UEFI + variable 882f8c2b-9646-435f-8de5-f208ff80c1bd-RTCInfo + wakeup-source: true required: -- 2.49.0