samples: shell: get CDC ACM UART device from devicetree

Add usb.overlay which contains chosen node and cdc-acm-uart node.
Change sample to get CDC ACM UART device from devicetree.

Signed-off-by: Johann Fischer <[email protected]>

Author: jfischer-no

samples/subsys/shell/shell_module/overlay-usb.conf

@@ -1,7 +1,5 @@
 CONFIG_USB_DEVICE_STACK=y
-CONFIG_USB_DEVICE_PRODUCT="Zephyr USB console sample"
+CONFIG_USB_DEVICE_PRODUCT="Zephyr USB shell sample"
 CONFIG_USB_UART_CONSOLE=y
-CONFIG_UART_INTERRUPT_DRIVEN=y
 CONFIG_UART_LINE_CTRL=y
-CONFIG_UART_SHELL_ON_DEV_NAME="CDC_ACM_0"
 CONFIG_SHELL_BACKEND_SERIAL_INIT_PRIORITY=51

samples/subsys/shell/shell_module/sample.yaml

@@ -15,6 +15,7 @@ tests:
     harness: keyboard
     min_ram: 40
     extra_args: OVERLAY_CONFIG="overlay-usb.conf"
+                DTC_OVERLAY_FILE="usb.overlay"
   sample.shell.shell_module.minimal:
     filter: ( CONFIG_SERIAL and CONFIG_UART_SHELL_ON_DEV_NAME )
     tags: shell

samples/subsys/shell/shell_module/src/main.c

@@ -338,8 +338,8 @@ void main(void)
 	const struct device *dev;
 	uint32_t dtr = 0;
 
-	dev = device_get_binding(CONFIG_UART_SHELL_ON_DEV_NAME);
-	if (dev == NULL || usb_enable(NULL)) {
+	dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_shell_uart));
+	if (!device_is_ready(dev) || usb_enable(NULL)) {
 		return;
 	}
 

samples/subsys/shell/shell_module/usb.overlay

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,shell-uart = &cdc_acm_uart0;
+	};
+};
+
+&zephyr_udc0 {
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+		label = "CDC_ACM_0";
+	};
+};