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From 31822340129e3c4030500d7f30ce4d19bbf9dd40 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Mon, 24 Jul 2023 17:34:47 +0100
Subject: [PATCH] overlays: Add trickle-voltage-mv parameter to RTCs
The RV3032 RTC requires an additional DT property to enable trickle
charging. Add a parameter - trickle-voltage-mv - to the i2c-rtc
and i2c-rtc-gpio overlays to set it.
See: https://github.com/raspberrypi/linux/issues/5547
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
arch/arm/boot/dts/overlays/README | 12 ++++++++----
arch/arm/boot/dts/overlays/i2c-rtc-common.dtsi | 2 ++
2 files changed, 10 insertions(+), 4 deletions(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1957,13 +1957,15 @@ Params: abx80x Select o
"schottky" (ABx80x and RV1805 only)
trickle-resistor-ohms Resistor value for trickle charge (DS1339,
- ABx80x, RV1805, RV3028)
+ ABx80x, BQ32000, RV1805, RV3028, RV3032)
+
+ trickle-voltage-mv Charge pump voltage for trickle charge (RV3032)
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)
+ off or 1 for Vdd < VBackup (RV3028, RV3032)
Name: i2c-rtc-gpio
@@ -2027,13 +2029,15 @@ Params: abx80x Select o
"schottky" (ABx80x and RV1805 only)
trickle-resistor-ohms Resistor value for trickle charge (DS1339,
- ABx80x, RV1805, RV3028)
+ ABx80x, BQ32000, RV1805, RV3028, RV3032)
+
+ trickle-voltage-mv Charge pump voltage for trickle charge (RV3032)
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)
+ off or 1 for Vdd < VBackup (RV3028, RV3032)
i2c_gpio_sda GPIO used for I2C data (default "23")
--- a/arch/arm/boot/dts/overlays/i2c-rtc-common.dtsi
+++ b/arch/arm/boot/dts/overlays/i2c-rtc-common.dtsi
@@ -339,8 +339,10 @@
<&ds1340>,"trickle-resistor-ohms:0",
<&abx80x>,"abracon,tc-resistor:0",
<&rv3028>,"trickle-resistor-ohms:0",
+ <&rv3032>,"trickle-resistor-ohms:0",
<&rv1805>,"abracon,tc-resistor:0",
<&bq32000>,"abracon,tc-resistor:0";
+ trickle-voltage-mv = <&rv3032>,"trickle-voltage-millivolts:0";
backup-switchover-mode = <&rv3028>,"backup-switchover-mode:0";
wakeup-source = <&ds1339>,"wakeup-source?",
<&ds3231>,"wakeup-source?",
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