<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">From a7a3679a148e40879f1ce77580d9edf64cb5b51c Mon Sep 17 00:00:00 2001
From: Jonathan Bell &lt;jonathan@raspberrypi.com&gt;
Date: Mon, 18 Sep 2023 16:33:06 +0100
Subject: [PATCH] dt: bindings: update rpi-rtc binding

Add property for bcm2712 firmware RTC driver charger control

Signed-off-by: Jonathan Bell &lt;jonathan@raspberrypi.com&gt;
---
 Documentation/devicetree/bindings/rtc/rtc-rpi.txt | 5 +++++
 1 file changed, 5 insertions(+)

--- a/Documentation/devicetree/bindings/rtc/rtc-rpi.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc-rpi.txt
@@ -9,9 +9,14 @@ Required properties:
 compatible: should be "raspberrypi,rpi-rtc"
 firmware:   Reference to the RPi firmware device node.
 
+Optional property:
+trickle-charge-microvolt: specify a trickle charge voltage for the backup
+                          battery in microvolts.
+
 Example:
 
 	rpi_rtc: rpi_rtc {
 		compatible = "raspberrypi,rpi-rtc";
 		firmware = &lt;&amp;firmware&gt;;
+		trickle-charge-microvolt = &lt;3000000&gt;;
 	};
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