boards: infineon: Add RTC to xmc4(75)_relax_kit boards

Adds RTC node to xmc4(75)_relax_kits.

Signed-off-by: Andriy Gelman <andriy.gelman@gmail.com>

boards/infineon/xmc45_relax_kit/doc/index.rst

@@ -63,6 +63,8 @@ The Relax Kit development board configuration supports the following hardware fe
 +-----------+------------+-----------------------+
 | PTP       | on-chip    | ethernet              |
 +-----------+------------+-----------------------+
+| RTC       | on-chip    | rtc                   |
++-----------+------------+-----------------------+
 
 More details about the supported peripherals are available in `XMC4500 TRM`_
 Other hardware features are not currently supported by the Zephyr kernel.

boards/infineon/xmc45_relax_kit/xmc45_relax_kit.dts

@@ -23,6 +23,7 @@
 		die-temp0 = &die_temp;
 		pwm-led0 = &pwm_led1;
 		watchdog0 = &wdt0;
+		rtc = &rtc;
 	};
 
 	leds {
@@ -162,3 +163,7 @@
 		reg = <0>;
 	};
 };
+
+&rtc {
+	status = "okay";
+};

boards/infineon/xmc45_relax_kit/xmc45_relax_kit.yaml

@@ -14,6 +14,7 @@ supported:
   - uart
   - watchdog
   - netif:eth
+  - rtc
 ram: 160
 flash: 1024
 vendor: infineon

boards/infineon/xmc47_relax_kit/doc/index.rst

@@ -66,6 +66,8 @@ The Relax Kit development board configuration supports the following hardware fe
 +-----------+------------+-----------------------+
 | PTP       | on-chip    | ethernet              |
 +-----------+------------+-----------------------+
+| RTC       | on-chip    | rtc                   |
++-----------+------------+-----------------------+
 
 More details about the supported peripherals are available in `XMC4700 TRM`_
 Other hardware features are not currently supported by the Zephyr kernel.

boards/infineon/xmc47_relax_kit/xmc47_relax_kit.dts

@@ -22,6 +22,7 @@
 		die-temp0 = &die_temp;
 		pwm-led0 = &pwm_led1;
 		watchdog0 = &wdt0;
+		rtc = &rtc;
 	};
 
 	leds {
@@ -201,6 +202,10 @@
 	};
 };
 
+&rtc {
+	status = "okay";
+};
+
 &can {
 	clock-prescaler = <6>;
 };

boards/infineon/xmc47_relax_kit/xmc47_relax_kit.yaml

@@ -16,6 +16,7 @@ supported:
   - arduino_serial
   - watchdog
   - netif:eth
+  - rtc
 ram: 352
 flash: 2048
 vendor: infineon