boards: arduino: uno_r4: Add PWM mapping

Add an `arduino-header-pwm` node to map the PWM channels.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

Author: soburi

boards/arduino/uno_r4/arduino_uno_r4_minima.overlay

@@ -24,7 +24,7 @@
 		compatible = "pwm-leds";
 		status = "disabled";
 		pwm_led: pwm_led {
-			pwms = <&pwm3 0 PWM_MSEC(1) PWM_POLARITY_NORMAL>;
+			pwms = <&arduino_pwm ARDUINO_HEADER_R3_D13 PWM_MSEC(1) PWM_POLARITY_NORMAL>;
 			label = "PWM_LED";
 		};
 	};
@@ -73,6 +73,23 @@
 				 <ARDUINO_HEADER_R3_A4 &adc0 21>,       /* P101 = CH21 */
 				 <ARDUINO_HEADER_R3_A5 &adc0 22>;       /* P100 = CH22 */
 	};
+
+	arduino_pwm: connector-pwm {
+		compatible = "arduino-header-pwm";
+		#pwm-cells = <3>;
+		pwm-map = <ARDUINO_HEADER_R3_D2 0 0 &pwm1 0 0 0>,       /* P105 = GPT1_A */
+			  <ARDUINO_HEADER_R3_D3 0 0 &pwm1 1 0 0>,       /* P104 = GPT1_B */
+			  <ARDUINO_HEADER_R3_D4 0 0 &pwm2 0 0 0>,       /* P103 = GPT2 A */
+			  <ARDUINO_HEADER_R3_D5 0 0 &pwm2 1 0 0>,       /* P102 = GPT2_B */
+			  <ARDUINO_HEADER_R3_D6 0 0 &pwm0 1 0 0>,       /* P106 = GPT0_B */
+			  <ARDUINO_HEADER_R3_D7 0 0 &pwm0 0 0 0>,       /* P107 = GPT0_A */
+			  <ARDUINO_HEADER_R3_D8 0 0 &pwm7 0 0 0>,       /* P304 = GPT7_A */
+			  <ARDUINO_HEADER_R3_D9 0 0 &pwm7 1 0 0>,       /* P303 = GPT7_B */
+			  <ARDUINO_HEADER_R3_D10 0 0 &pwm3 1 0 0>,      /* P112 = GPT3_B */
+			  <ARDUINO_HEADER_R3_D13 0 0 &pwm3 0 0 0>;      /* P111 = GPT3_A */
+		pwm-map-mask = <0xffffffff 0x0 0x0>;
+		pwm-map-pass-thru = <0x0 0xffffffff 0xffffffff>;
+	};
 };
 
 &spi1 {

boards/arduino/uno_r4/arduino_uno_r4_wifi.overlay

@@ -24,7 +24,7 @@
 		compatible = "pwm-leds";
 		status = "disabled";
 		pwm_led: pwm_led {
-			pwms = <&pwm2 1 PWM_MSEC(1) PWM_POLARITY_NORMAL>;
+			pwms = <&arduino_pwm ARDUINO_HEADER_R3_D13 PWM_MSEC(1) PWM_POLARITY_NORMAL>;
 			label = "PWM_LED";
 		};
 	};
@@ -73,6 +73,25 @@
 				 <ARDUINO_HEADER_R3_A4 &adc0 21>,       /* P101 = CH21 */
 				 <ARDUINO_HEADER_R3_A5 &adc0 22>;       /* P100 = CH22 */
 	};
+
+	arduino_pwm: connector-pwm {
+		compatible = "arduino-header-pwm";
+		#pwm-cells = <3>;
+		pwm-map = <ARDUINO_HEADER_R3_D2 0 0 &pwm1 1 0 0>,       /* P104 = GPT1_B */
+			  <ARDUINO_HEADER_R3_D3 0 0 &pwm1 0 0 0>,       /* P105 = GPT1_A */
+			  <ARDUINO_HEADER_R3_D4 0 0 &pwm0 1 0 0>,       /* P106 = GPT0 B */
+			  <ARDUINO_HEADER_R3_D5 0 0 &pwm0 0 0 0>,       /* P107 = GPT0_A */
+			  <ARDUINO_HEADER_R3_D6 0 0 &pwm3 0 0 0>,       /* P111 = GPT3_A */
+			  <ARDUINO_HEADER_R3_D7 0 0 &pwm3 1 0 0>,       /* P112 = GPT3_B */
+			  <ARDUINO_HEADER_R3_D8 0 0 &pwm7 0 0 0>,       /* P304 = GPT7_A */
+			  <ARDUINO_HEADER_R3_D9 0 0 &pwm7 1 0 0>,       /* P303 = GPT7_B */
+			  <ARDUINO_HEADER_R3_D10 0 0 &pwm2 0 0 0>,      /* P103 = GPT2_A */
+			  <ARDUINO_HEADER_R3_D11 0 0 &pwm6 0 0 0>,      /* P411 = GPT6_A */
+			  <ARDUINO_HEADER_R3_D12 0 0 &pwm6 1 0 0>,      /* P410 = GPT6_B */
+			  <ARDUINO_HEADER_R3_D13 0 0 &pwm2 1 0 0>;      /* P102 = GPT2_B */
+		pwm-map-mask = <0xffffffff 0x0 0x0>;
+		pwm-map-pass-thru = <0x0 0xffffffff 0xffffffff>;
+	};
 };
 
 &spi0 {