boards: arm: nucleo_c031c6: Enable rtc

Enable rtc and update documentation to include counter
support.

Signed-off-by: Benjamin Björnsson <[email protected]>

Author: benjaminbjornsson

boards/arm/nucleo_c031c6/doc/index.rst

@@ -74,6 +74,8 @@ The Zephyr nucleo_c031c6 board configuration supports the following hardware fea
 +-----------+------------+-------------------------------------+
 | CLOCK     | on-chip    | reset and clock control             |
 +-----------+------------+-------------------------------------+
+| RTC       | on-chip    | counter                             |
++-----------+------------+-------------------------------------+
 
 Other hardware features are not yet supported in this Zephyr port.
 

boards/arm/nucleo_c031c6/nucleo_c031c6.dts

@@ -43,6 +43,10 @@
 	};
 };
 
+&clk_lse {
+	status = "okay";
+};
+
 &clk_hse {
 	clock-frequency = <DT_FREQ_M(48)>;
 	status = "okay";
@@ -67,3 +71,9 @@
 	current-speed = <115200>;
 	status = "okay";
 };
+
+&rtc {
+	clocks = <&rcc STM32_CLOCK_BUS_APB1 0x00000400>,
+		 <&rcc STM32_SRC_LSE RTC_SEL(1)>;
+	status = "okay";
+};

boards/arm/nucleo_c031c6/nucleo_c031c6.yaml

@@ -8,5 +8,6 @@ toolchain:
   - xtools
 supported:
   - gpio
+  - counter
 ram: 12
 flash: 32