boards: arm: mixmrt1170_evkb: add support for ADC

Add support for ADC sample and API test on RT1170 EVKB.

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

Author: danieldegrasse

boards/arm/mimxrt1170_evk/doc/index.rst

@@ -110,7 +110,7 @@ RT1170 EVKB (`mimxrt1170_evkb_cm7/cm4`)
 +-----------+------------+-------------------------------------+-----------------+-----------------+
 | PWM       | on-chip    | pwm                                 | Supported       | Supported       |
 +-----------+------------+-------------------------------------+-----------------+-----------------+
-| ADC       | on-chip    | adc                                 | Supported (M7)  | No support      |
+| ADC       | on-chip    | adc                                 | Supported (M7)  | Supported (M7)  |
 +-----------+------------+-------------------------------------+-----------------+-----------------+
 | UART      | on-chip    | serial port-polling;                | Supported       | Supported       |
 |           |            | serial port-interrupt;              |                 |                 |

boards/arm/mimxrt1170_evk/mimxrt1170_evkb_cm7.yaml

@@ -15,6 +15,7 @@ toolchain:
 ram: 65536
 flash: 65536
 supported:
+  - adc
   - counter
   - can
   - gpio

samples/drivers/adc/boards/mimxrt1170_evkb_cm7.overlay

@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright 2023 NXP
+ */
+
+#include <zephyr/dt-bindings/adc/mcux-lpadc.h>
+
+/ {
+	zephyr,user {
+		/* adjust channel number according to pinmux in board.dts */
+		io-channels = <&lpadc0 0>;
+	};
+};
+
+&lpadc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	/*
+	 * To use this sample:
+	 * - Connect LPADC0 CH0 signal to voltage between 0~1.8V (J9 pin 10)
+	 */
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_EXTERNAL0";
+		zephyr,vref-mv = <1800>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+		zephyr,input-positive = <MCUX_LPADC_CH0A>;
+	};
+};

tests/drivers/adc/adc_api/boards/mimxrt1170_evkb_cm7.overlay

@@ -0,0 +1,36 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright 2023 NXP
+ */
+
+#include <zephyr/dt-bindings/adc/mcux-lpadc.h>
+
+/ {
+	zephyr,user {
+		io-channels = <&lpadc0 0>, <&lpadc0 1>;
+	};
+};
+
+&lpadc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_EXTERNAL0";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+                zephyr,input-positive = <MCUX_LPADC_CH0A>;
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_EXTERNAL0";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+                zephyr,input-positive = <MCUX_LPADC_CH1A>;
+	};
+};