boards: st: nucleo_wb05kz: add PWM support and LED

Add the PWM LED to Nucleo-WB05KZ board and mark as compatible with PWM.
Also mark counters as supported (but don't enable by default).

Signed-off-by: Mathieu Choplain <mathieu.choplain@st.com>

boards/st/nucleo_wb05kz/doc/index.rst

@@ -52,6 +52,8 @@ The Zephyr ``nucleo_wb05kz`` board target supports the following hardware featur
 +-----------+------------+-------------------------------------+
 | ADC       | on-chip    | adc                                 |
 +-----------+------------+-------------------------------------+
+| TIMER     | on-chip    | counter, pwm                        |
++-----------+------------+-------------------------------------+
 | RADIO     | on-chip    | Bluetooth Low Energy                |
 +-----------+------------+-------------------------------------+
 

boards/st/nucleo_wb05kz/nucleo_wb05kz.dts

@@ -39,6 +39,14 @@
 		};
 	};
 
+	pwmleds: pwmleds {
+		compatible = "pwm-leds";
+		status = "okay";
+		pwm_red_led_1: pwm_led_1 {
+			pwms = <&pwm2 3 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
+		};
+	};
+
 	gpio_keys {
 		compatible = "gpio-keys";
 		user_button_1: button_0 {
@@ -62,6 +70,7 @@
 		led0 = &blue_led_1;
 		led1 = &green_led_1;
 		led2 = &red_led_1;
+		pwm-led0 = &pwm_red_led_1;
 		sw0 = &user_button_1;
 		sw1 = &user_button_2;
 		sw2 = &user_button_3;
@@ -122,6 +131,19 @@
 		<&rcc STM32_SRC_SYSCLK SPI3_I2S3_SEL(3)>;
 };
 
+
+&timers2 {
+	status = "okay";
+	st,prescaler = <10000>;
+
+	pwm2: pwm {
+		/* PWM on red_led_1 */
+		pinctrl-0 = <&tim2_ch3_pb2>;
+		pinctrl-names = "default";
+		status = "okay";
+	};
+};
+
 &flash0 {
 	partitions {
 		compatible = "fixed-partitions";

boards/st/nucleo_wb05kz/nucleo_wb05kz.yaml

@@ -12,9 +12,11 @@ supported:
   - adc
   - arduino_i2c
   - arduino_spi
+  - counter
   - dma
   - gpio
   - i2c
+  - pwm
   - spi
   - bluetooth
 vendor: st