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From fd478b369992e56665de3aabf0e19e24b5fa5e43 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Fri, 26 Feb 2021 14:19:00 +0000
Subject: [PATCH] overlays: i2c-rtc: Add the Dallas DS1340
See: https://github.com/raspberrypi/linux/issues/4180
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
arch/arm/boot/dts/overlays/README | 2 ++
arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts | 16 ++++++++++++++++
2 files changed, 18 insertions(+)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1311,6 +1311,8 @@ Params: abx80x Select o
ds1339 Select the DS1339 device
+ ds1340 Select the DS1340 device
+
ds3231 Select the DS3231 device
m41t62 Select the M41T62 device
--- a/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
@@ -231,6 +231,20 @@
};
};
+ fragment@17 {
+ target = <&i2cbus>;
+ __dormant__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ds1340: ds1340@68 {
+ compatible = "dallas,ds1340";
+ trickle-resistor-ohms = <0>;
+ reg = <0x68>;
+ };
+ };
+ };
+
frag100: fragment@100 {
target = <&i2c_arm>;
i2cbus: __overlay__ {
@@ -242,6 +256,7 @@
abx80x = <0>,"+0";
ds1307 = <0>,"+1";
ds1339 = <0>,"+2";
+ ds1340 = <0>,"+17";
ds3231 = <0>,"+3";
mcp7940x = <0>,"+4";
mcp7941x = <0>,"+5";
@@ -273,6 +288,7 @@
trickle-diode-type = <&abx80x>,"abracon,tc-diode",
<&rv1805>,"abracon,tc-diode";
trickle-resistor-ohms = <&ds1339>,"trickle-resistor-ohms:0",
+ <&ds1340>,"trickle-resistor-ohms:0",
<&abx80x>,"abracon,tc-resistor:0",
<&rv3028>,"trickle-resistor-ohms:0",
<&rv1805>,"abracon,tc-resistor:0";
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