boards: renesas: rzg3s_smarc: Add PWM support

Add PWM support for board RZ/G3S-SMARC

Signed-off-by: Hieu Nguyen <[email protected]>
Signed-off-by: Binh Nguyen <[email protected]>

Author: Hieu Nguyen

boards/renesas/rzg3s_smarc/doc/index.rst

@@ -69,6 +69,8 @@ and the following hardware features:
 +-----------+------------+-------------------------------------+
 | GTM       | on-chip    | counter                             |
 +-----------+------------+-------------------------------------+
+| GPT       | on-chip    | pwm                                 |
++-----------+------------+-------------------------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/rzg3s_smarc/rzg3s_smarc-pinctrl.dtsi

@@ -35,4 +35,24 @@
 				 <RZG_PINMUX(PORT_15, 2, 6)>; /* TXD */
 		};
 	};
+
+	/omit-if-no-ref/ gpt0_pins: gpt0 {
+		gpt0-pinmux {
+			pinmux = <RZG_PINMUX(PORT_13, 0, 2)>, /* GTIOCA */
+				 <RZG_PINMUX(PORT_13, 1, 2)>; /* GTIOCB */
+		};
+	};
+
+	/omit-if-no-ref/ gpt3_pins: gpt3 {
+		gpt3-pinmux {
+			pinmux = <RZG_PINMUX(PORT_18, 0, 7)>, /* GTIOCA */
+				 <RZG_PINMUX(PORT_18, 1, 7)>; /* GTIOCB */
+		};
+	};
+
+	/omit-if-no-ref/ gpt6_pins: gpt6 {
+		gpt6-pinmux {
+			pinmux = <RZG_PINMUX(PORT_13, 4, 7)>; /* GTIOCA */
+		};
+	};
 };

boards/renesas/rzg3s_smarc/rzg3s_smarc_r9a08g045s33gbg_cm33.yaml

@@ -9,3 +9,4 @@ supported:
   - uart
   - gpio
   - counter
+  - pwm