boards: cc13x2/cc26x2*: add ADC sample + update docs

Add ADC driver sample overlays + update features in doc + metadata for TI
CC13x2/CC26x2 based boards (cc1352r_sensortag, cc1352r1_launchxl,
cc26x2r1_launchxl).

Signed-off-by: Stancu Florin <niflostancu@gmail.com>

boards/arm/cc1352r1_launchxl/cc1352r1_launchxl.dts

@@ -83,6 +83,10 @@
 	status = "okay";
 };
 
+&adc0 {
+	status = "okay";
+};
+
 &uart0 {
 	status = "okay";
 	current-speed = <115200>;

boards/arm/cc1352r1_launchxl/cc1352r1_launchxl.yaml

@@ -12,3 +12,4 @@ supported:
   - gpio
   - i2c
   - spi
+  - adc

boards/arm/cc1352r1_launchxl/doc/index.rst

@@ -53,6 +53,8 @@ features:
 +-----------+------------+----------------------+
 | SPI       | on-chip    | spi                  |
 +-----------+------------+----------------------+
+| AUX_ADC   | on-chip    | adc                  |
++-----------+------------+----------------------+
 
 Other hardware features have not been enabled yet for this board.
 

boards/arm/cc1352r_sensortag/cc1352r_sensortag.dts

@@ -94,6 +94,10 @@
 	status = "okay";
 };
 
+&adc0 {
+	status = "okay";
+};
+
 &uart0 {
 	status = "okay";
 	current-speed = <115200>;

boards/arm/cc1352r_sensortag/cc1352r_sensortag.yaml

@@ -12,3 +12,4 @@ supported:
   - gpio
   - i2c
   - spi
+  - adc

boards/arm/cc1352r_sensortag/doc/index.rst

@@ -53,6 +53,8 @@ features:
 +-----------+------------+------------------+
 | SPI       | on-chip    | spi              |
 +-----------+------------+------------------+
+| AUX_ADC   | on-chip    | adc              |
++-----------+------------+------------------+
 | DIO23     | off-chip   | DRV5032          |
 +-----------+------------+------------------+
 | I2C       | off-chip   | HDC2080          |

boards/arm/cc26x2r1_launchxl/cc26x2r1_launchxl.dts

@@ -83,6 +83,10 @@
 	status = "okay";
 };
 
+&adc0 {
+	status = "okay";
+};
+
 &uart0 {
 	status = "okay";
 	current-speed = <115200>;

boards/arm/cc26x2r1_launchxl/cc26x2r1_launchxl.yaml

@@ -12,3 +12,4 @@ supported:
   - gpio
   - i2c
   - spi
+  - adc

boards/arm/cc26x2r1_launchxl/doc/index.rst

@@ -53,6 +53,8 @@ features:
 +-----------+------------+----------------------+
 | SPI       | on-chip    | spi                  |
 +-----------+------------+----------------------+
+| AUX_ADC   | on-chip    | adc                  |
++-----------+------------+----------------------+
 
 Other hardware features have not been enabled yet for this board.
 

samples/drivers/adc/boards/cc1352r1_launchxl.overlay

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2022 Florin Stancu <niflostancu@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/adc/adc.h>
+
+/ {
+	zephyr,user {
+		/* 0x5 is ADC_COMPB_IN_VDDS (power supply measurement) */
+		io-channels = <&adc0 0x5>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@5 {
+		reg = <5>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

samples/drivers/adc/boards/cc1352r_sensortag.overlay

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2022 Florin Stancu <niflostancu@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/adc/adc.h>
+
+/ {
+	zephyr,user {
+		/* 0x5 is ADC_COMPB_IN_VDDS (power supply measurement) */
+		io-channels = <&adc0 0x5>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@5 {
+		reg = <5>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

samples/drivers/adc/boards/cc26x2r1_launchxl.overlay

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2022 Florin Stancu <niflostancu@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/adc/adc.h>
+
+/ {
+	zephyr,user {
+		/* 0x5 is ADC_COMPB_IN_VDDS (power supply measurement) */
+		io-channels = <&adc0 0x5>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@5 {
+		reg = <5>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};