boards: arm: mimxrt1060_evk: added additional PWM outputs

Added PWM outputs to arduino header, to make testing PWM support with
this EVK simpler. These PWM outputs are enabled by the pwm_api test,
although they are not used. The user can enable the PWM shell in order
to test these PWM outputs.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

boards/arm/mimxrt1060_evk/mimxrt1060_evk-pinctrl.dtsi

@@ -98,7 +98,7 @@
 	};
 
 	/* flexpwm output for board LED */
-	pinmux_flexpwm2: pinmux_flexpwm2 {
+	pinmux_flexpwm2_3: pinmux_flexpwm2_3 {
 		group0 {
 			pinmux = <&iomuxc_gpio_ad_b0_09_flexpwm2_pwma3>;
 			drive-strength = "r0-4";
@@ -109,6 +109,29 @@
 		};
 	};
 
+	/* Conflicts with SD and SPI pins. Requires R281/R356 be populated */
+	pinmux_flexpwm1_0: pinmux_flexpwm1_0 {
+		group0 {
+			pinmux = <&iomuxc_gpio_sd_b0_01_flexpwm1_pwmb0>;
+			drive-strength = "r0-4";
+			bias-pull-up;
+			bias-pull-up-value = "47k";
+			slew-rate = "slow";
+			nxp,speed = "100-mhz";
+		};
+	};
+
+	pinmux_flexpwm1: pinmux_flexpwm1 {
+		group0 {
+			pinmux = <&iomuxc_gpio_ad_b0_10_flexpwm1_pwma3>;
+			drive-strength = "r0-4";
+			bias-pull-up;
+			bias-pull-up-value = "47k";
+			slew-rate = "slow";
+			nxp,speed = "100-mhz";
+		};
+	};
+
 	pinmux_flexspi1: pinmux_flexspi1 {
 		group0 {
 			pinmux = <&iomuxc_gpio_sd_b1_05_flexspi_a_dqs>;

boards/arm/mimxrt1060_evk/mimxrt1060_evk.dts

@@ -238,7 +238,17 @@ zephyr_udc0: &usb1 {
 
 &flexpwm2_pwm3 {
 	status = "okay";
-	pinctrl-0 = <&pinmux_flexpwm2>;
+	pinctrl-0 = <&pinmux_flexpwm2_3>;
+	pinctrl-names = "default";
+};
+
+&flexpwm1_pwm0 {
+	pinctrl-0 = <&pinmux_flexpwm1_0>;
+	pinctrl-names = "default";
+};
+
+&flexpwm1_pwm3 {
+	pinctrl-0 = <&pinmux_flexpwm1>;
 	pinctrl-names = "default";
 };
 

tests/drivers/pwm/pwm_api/boards/mimxrt1060_evk.overlay

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2023 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * Enable PWM outputs on J24 pin 3 and J22 pin 6. These outputs are not used
+ * by the test, but can be tested using the PWM shell.
+ */
+
+&flexpwm1_pwm3 {
+	status = "okay";
+};
+
+&flexpwm1_pwm0 {
+	status = "okay";
+};