openwrt/target/linux/brcm2708/patches-4.4/0344-BCM270X_DT-Fix-the-tinylcd35-overlay-RTC-support.patch

From 9812988c5073448717f74b5bf9aae9da029fb530 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Thu, 12 May 2016 09:04:20 +0100
Subject: [PATCH 344/423] BCM270X_DT: Fix the tinylcd35 overlay RTC support

Now that overlay parameters are applied before the merge (a requirement
for kernel runtime overlays) it is illegal for parameters/overrides to
target nodes in the base DTB. Solve the problem of only enabling I2C
when an RTC option is used by making the RTC fragments conditional,
and including the required status="okay" within the fragments.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 arch/arm/boot/dts/overlays/tinylcd35-overlay.dts | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

--- a/arch/arm/boot/dts/overlays/tinylcd35-overlay.dts
+++ b/arch/arm/boot/dts/overlays/tinylcd35-overlay.dts
@@ -132,28 +132,32 @@
 
 	fragment@5 {
 		target = <&i2c1>;
-		__overlay__ {
+		__dormant__ {
 			#address-cells = <1>;
 			#size-cells = <0>;
 
+			status = "okay";
+
 			pcf8563: pcf8563@51 {
 				compatible = "nxp,pcf8563";
 				reg = <0x51>;
-				status = "disabled";
+				status = "okay";
 			};
 		};
 	};
 
 	fragment@6 {
 		target = <&i2c1>;
-		__overlay__ {
+		__dormant__ {
 			#address-cells = <1>;
 			#size-cells = <0>;
 
+			status = "okay";
+
 			ds1307: ds1307@68 {
 				compatible = "maxim,ds1307";
 				reg = <0x68>;
-				status = "disabled";
+				status = "okay";
 			};
 		};
 	};
@@ -213,10 +217,8 @@
 			     <&tinylcd35_ts>,"interrupts:0",
 			     <&tinylcd35_ts>,"pendown-gpio:4";
 		xohms =      <&tinylcd35_ts>,"ti,x-plate-ohms;0";
-		rtc-pcf =    <&i2c1>,"status",
-			     <&pcf8563>,"status";
-		rtc-ds =     <&i2c1>,"status",
-			     <&ds1307>,"status";
+		rtc-pcf =    <0>,"=5";
+		rtc-ds =     <0>,"=6";
 		keypad =     <&keypad>,"status";
 	};
 };