[openwrt/openwrt] mediatek: UniFi 6 LR: disable RTC

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-22.03:
https://git.openwrt.org/049093b9fd94c60855dc2894e883157c6392526f

commit 049093b9fd94c60855dc2894e883157c6392526f
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Sat Jun 18 17:30:02 2022 +0100

    mediatek: UniFi 6 LR: disable RTC
    
    There is not RTC battery connected to the SoC of the UniFi 6 LR board.
    Disable the RTC to prevent the system coming up with time set to
    2000-01-01 00:00:00 after each reboot.
    
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
    (cherry picked from commit 692d87a27b44ac73c10cd511c00ee0bec1316d9f)
---
 target/linux/mediatek/dts/mt7622-ubnt-unifi-6-lr.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/target/linux/mediatek/dts/mt7622-ubnt-unifi-6-lr.dtsi b/target/linux/mediatek/dts/mt7622-ubnt-unifi-6-lr.dtsi
index ae587a11a0..f7881af624 100644
--- a/target/linux/mediatek/dts/mt7622-ubnt-unifi-6-lr.dtsi
+++ b/target/linux/mediatek/dts/mt7622-ubnt-unifi-6-lr.dtsi
@@ -203,6 +203,12 @@
 	};
 };
 
+&rtc {
+	status = "disabled";
+
+	/* No RTC battery */
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins>;