drivers: pwm: sam: Enable sam3x and sam4e SoCs

Add support to Atmel SAM SAM3X and SAM4E PWM feature.

Signed-off-by: Gerson Fernando Budke <[email protected]>

Author: nandojve

boards/arm/arduino_due/arduino_due-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Gerson Fernando Budke <[email protected]>
+ * Copyright (c) 2022-2023, Gerson Fernando Budke <[email protected]>
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -52,4 +52,11 @@
 				 <PD4B_USART3_TXD>;
 		};
 	};
+
+	pwm0_default: pwm0_default {
+		group1 {
+			pinmux = <PC4B_PWM_PWML1>,
+				 <PC5B_PWM_PWMH1>;
+		};
+	};
 };

boards/arm/arduino_due/arduino_due.dts

@@ -13,6 +13,7 @@
 		uart-0 = &uart;
 		i2c-0 = &twi0;
 		i2c-1 = &twi1;
+		pwm-0 = &pwm0;
 		led0 = &yellow_led;
 		watchdog0 = &wdt;
 	};
@@ -64,4 +65,11 @@
 	pinctrl-names = "default";
 };
 
+&pwm0 {
+	status = "okay";
+
+	pinctrl-0 = <&pwm0_default>;
+	pinctrl-names = "default";
+};
+
 arduino_i2c: &twi1 { };

boards/arm/sam4e_xpro/sam4e_xpro-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Gerson Fernando Budke <[email protected]>
+ * Copyright (c) 2022-2023, Gerson Fernando Budke <[email protected]>
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -74,4 +74,11 @@
 				 <PA25A_USART1_CTS>;
 		};
 	};
+
+	pwm0_default: pwm0_default {
+		group1 {
+			pinmux = <PD20A_PWM_PWMH0>,
+				 <PD24A_PWM_PWML0>;
+		};
+	};
 };

boards/arm/sam4e_xpro/sam4e_xpro.dts

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 Gerson Fernando Budke
+ * Copyright (c) 2019-2023 Gerson Fernando Budke
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -15,6 +15,7 @@
 
 	aliases {
 		i2c-0 = &twi0;
+		pwm-0 = &pwm0;
 		led0 = &yellow_led_1;
 		sw0 = &user_button;
 		wdog = &wdt;
@@ -187,6 +188,13 @@
 	pinctrl-names = "default";
 };
 
+&pwm0 {
+	status = "okay";
+
+	pinctrl-0 = <&pwm0_default>;
+	pinctrl-names = "default";
+};
+
 &wdt {
 	status = "okay";
 };

dts/arm/atmel/sam3x.dtsi

@@ -229,6 +229,17 @@
 			status = "disabled";
 		};
 
+		pwm0: pwm@40094000 {
+			compatible = "atmel,sam-pwm";
+			reg = <0x40094000 0x4000>;
+			interrupts = <36 1>;
+			clocks = <&pmc PMC_TYPE_PERIPHERAL 36>;
+			prescaler = <10>;
+			divider = <1>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
 		rstc: rstc@400e1a00 {
 			compatible = "atmel,sam-rstc";
 			reg = <0x400e1a00 0x10>;

dts/arm/atmel/sam4e.dtsi

@@ -248,6 +248,17 @@
 			status = "disabled";
 		};
 
+		pwm0: pwm@40000000 {
+			compatible = "atmel,sam-pwm";
+			reg = <0x40000000 0x4000>;
+			interrupts = <36 1>;
+			clocks = <&pmc PMC_TYPE_PERIPHERAL 36>;
+			prescaler = <10>;
+			divider = <1>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
 		rstc: rstc@400e1800 {
 			compatible = "atmel,sam-rstc";
 			reg = <0x400e1800 0x10>;