linux-kernel - [PATCH v2 1/6] dt-bindings: rtc: qcom-pm8xxx: document qcom,no-alarm flag

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Message-ID: <20250219134118.31017-2-johan+linaro@kernel.org>
Date: Wed, 19 Feb 2025 14:41:13 +0100
From: Johan Hovold <johan+linaro@...nel.org>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Bjorn Andersson <andersson@...nel.org>
Cc: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Jonathan Marek <jonathan@...ek.ca>,
	Ard Biesheuvel <ardb@...nel.org>,
	Maximilian Luz <luzmaximilian@...il.com>,
	Jens Glathe <jens.glathe@...schoolsolutions.biz>,
	Joel Stanley <joel@....id.au>,
	Sebastian Reichel <sre@...nel.org>,
	Steev Klimaszewski <steev@...i.org>,
	linux-arm-msm@...r.kernel.org,
	linux-rtc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH v2 1/6] dt-bindings: rtc: qcom-pm8xxx: document qcom,no-alarm flag

From: Jonathan Marek <jonathan@...ek.ca>

Qualcomm x1e80100 firmware sets the ownership of the RTC alarm to ADSP.
Thus writing to RTC alarm registers and receiving alarm interrupts is not
possible.

Add a qcom,no-alarm flag to support RTC on this platform.

Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
Link: https://lore.kernel.org/r/20241015004945.3676-3-jonathan@marek.ca
[ johan: move vendor property; use boolean; reword description ]
Acked-by: Rob Herring (Arm) <robh@...nel.org>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
index d274bb7a534b..68ef3208c886 100644
--- a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
@@ -50,6 +50,11 @@ properties:
     items:
       - const: offset
 
+  qcom,no-alarm:
+    type: boolean
+    description:
+      RTC alarm is not owned by the OS
+
   wakeup-source: true
 
 required:
-- 
2.45.3