From a2fdc7a590566d99d5261badeecb644664ff0fb3 Mon Sep 17 00:00:00 2001
From: Phil Howard <phil@gadgetoid.com>
Date: Fri, 29 Mar 2019 10:59:55 +0000
Subject: [PATCH] overlays: Add rv3028 backup switchover support to
 i2c-rtc

Signed-off-by: Phil Howard <phil@pimoroni.com>
---
 arch/arm/boot/dts/overlays/README              | 3 +++
 arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts | 1 +
 2 files changed, 4 insertions(+)

--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1013,6 +1013,9 @@ Params: abx80x                  Select o
         wakeup-source           Specify that the RTC can be used as a wakeup
                                 source
 
+        backup-switchover-mode  Backup power supply switch mode. Must be 0 for
+                                off or 1 for Vdd < VBackup (RV3028 only)
+
 
 Name:   i2c-rtc-gpio
 Info:   Adds support for a number of I2C Real Time Clock devices
--- a/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
@@ -200,6 +200,7 @@
 		trickle-resistor-ohms = <&ds1339>,"trickle-resistor-ohms:0",
 					<&abx80x>,"abracon,tc-resistor",
 					<&rv3028>,"trickle-resistor-ohms:0";
+		backup-switchover-mode = <&rv3028>,"backup-switchover-mode:0";
 		wakeup-source = <&ds1339>,"wakeup-source?",
 				<&ds3231>,"wakeup-source?",
 				<&mcp7940x>,"wakeup-source?",
