openwrt/target/linux/bcm27xx/patches-5.4/950-0981-overlays-Add-sd3078-to-the-i2c-rtc-overlay.patch

From 8688b06ae53d6f60adcdcfe3d58ad7ef0ed7dba0 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Mon, 5 Oct 2020 16:10:26 +0100
Subject: [PATCH] overlays: Add sd3078 to the i2c-rtc overlay

Add support for the SD3078 RTC to the i2c-rtc overlay.

See: https://github.com/raspberrypi/linux/issues/3881

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
@@ -1232,6 +1232,8 @@ Params: abx80x                  Select o
 
         rv3028                  Select the Micro Crystal RV3028 device
 
+        sd3078                  Select the ZXW Shenzhen whwave SD3078 device
+
         addr                    Sets the address for the RTC. Note that the
                                 device must be configured to use the specified
                                 address.
--- a/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
@@ -220,6 +220,21 @@
 		};
 	};
 
+	fragment@14 {
+		target = <&i2c_arm>;
+		__dormant__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			sd3078: sd3078@32 {
+				compatible = "whwave,sd3078";
+				reg = <0x32>;
+				status = "okay";
+			};
+		};
+	};
+
 	__overrides__ {
 		abx80x = <0>,"+0";
 		ds1307 = <0>,"+1";
@@ -235,6 +250,7 @@
 		pcf2129 = <0>,"+11";
 		pcf85363 = <0>,"+12";
 		rv1805 = <0>,"+13";
+		sd3078 = <0>,"+14";
 
 		addr = <&abx80x>, "reg:0",
 		       <&ds1307>, "reg:0",