[PATCHv1 1/3] arm64: dts: meson-g12b-odroid-n2: Enable RTC controller node

[Anand Moon <linux.amoon@gmail.com>]

Enable RTC PCF8563 node on Odroid-N2 SBC, In order
to support the RTC wakealarm feature for suspend and resume.

Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
$ sudo hwclock -r && date
2020-07-15 13:11:53.862508+00:00
Wed Jul 15 13:11:54 UTC 2020

$ hwclock --show
2020-07-15 13:17:30.903300+00:00

But RTC wake up is not working at my end.
Any inputs are welcome.

$ time rtcwake -s 30 -m mem
rtcwake: /dev/rtc0 not enabled for wakeup events

real    0m0.002s
user    0m0.002s
sys     0m0.000s
---
 .../boot/dts/amlogic/meson-g12b-odroid-n2.dts      | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
index 169ea283d4ee..a447cba4dd53 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
@@ -391,6 +391,20 @@ hdmi_tx_tmds_out: endpoint {
 	};
 };
 
+&i2c3 {
+	pinctrl-0 = <&i2c3_sda_a_pins>, <&i2c3_sck_a_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	rtc: rtc@51 {
+		reg = <0x51>;
+		compatible = "nxp,pcf8563";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		clock-output-names = "rtc_clkout";
+	};
+};
+
 &ir {
 	status = "okay";
 	pinctrl-0 = <&remote_input_ao_pins>;
-- 
2.27.0