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35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From e24b6c2f44a311cb5ae222a7046594c9ab95f80e Mon Sep 17 00:00:00 2001
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From: Dom Cobley <popcornmix@gmail.com>
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Date: Fri, 7 Jul 2023 20:16:06 +0100
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Subject: [PATCH] dt-bindings: rtc: new binding for Raspberry Pi RTC driver
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Add binding for the new RTC driver for Raspberry Pi.
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This platform has an RTC managed by firmware, and this RTC
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driver provides the simple mailbox interface to access it.
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Signed-off-by: Dom Cobley <popcornmix@gmail.com>
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---
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.../devicetree/bindings/rtc/rtc-rpi.txt | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/rtc/rtc-rpi.txt
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/rtc/rtc-rpi.txt
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@@ -0,0 +1,17 @@
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+* Raspberry Pi RTC
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+
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+This is a Linux interface to an RTC managed by firmware, hence it's
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+virtual from a Linux perspective.
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+
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+The interface uses the firmware mailbox api to access the RTC registers.
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+
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+Required properties:
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+compatible: should be "raspberrypi,rpi-rtc"
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+firmware: Reference to the RPi firmware device node.
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+
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+Example:
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+
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+ rpi_rtc: rpi_rtc {
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+ compatible = "raspberrypi,rpi-rtc";
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+ firmware = <&firmware>;
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+ };
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