[PATCH v4 1/2] arm64: dts: meson-g12b-odroid-n2: Enable RTC controller node

[Anand Moon]

Enable RTC PCF8563 node on Odroid-N2 SBC, In order to
support the RTC wakealarm feature for suspend and resume.
Also assign an alias to the pcf8563 to rtc0 and meson-vrtc to rtc1
timer device to prevent it being assigned to /dev/rtc0
which disto userspace tools assume is a clock device.

Cc: Neil Armstrong <narmstrong at baylibre.com>
Cc: Kevin Hilman <khilman at baylibre.com>
Suggested-by: Christian Hewitt <christianshewitt at gmail.com>
Signed-off-by: Anand Moon <linux.amoon at gmail.com>
---
Changes v4
--Add gpio interrupt for GPIOAO.BIT7 as suggested by Neil.
Changes v3
--Drop the INI GPIOAO.BIT7 pinctrl.
--Added missing RTC alias so that rtc get assigned correcly,
  as suggested by Chris Hewitt.
changes v2
--Fix the missing INT (GPIOAO.BIT7) pinctrl.
--Fix the missing rtcwakeup.
--Drop the clock not required clock property by the PCF8563 driver.
---
 .../boot/dts/amlogic/meson-g12b-odroid-n2.dts   | 17 +++++++++++++++++
 1 file changed, 17 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 34fffa6d859d..3e2aaa6f48e5 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
@@ -19,6 +19,8 @@ / {
 	aliases {
 		serial0 = &uart_AO;
 		ethernet0 = ðmac;
+		rtc0 = &rtc0;
+		rtc1 = &vrtc;
 	};
 
 	dioo2133: audio-amplifier-0 {
@@ -477,6 +479,21 @@ hdmi_tx_tmds_out: endpoint {
 	};
 };
 
+&i2c3 {
+	pinctrl-0 = <&i2c3_sda_a_pins>, <&i2c3_sck_a_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	rtc0: rtc at 51 {
+		reg = <0x51>;
+		compatible = "nxp,pcf8563";
+		/* RTC INT */
+		interrupts = <GPIOAO_7 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-parent = <&gpio_intc>;
+		wakeup-source;
+	};
+};
+
 &ir {
 	status = "okay";
 	pinctrl-0 = <&remote_input_ao_pins>;
-- 
2.28.0