drivers: can: make the fake CAN driver generally available

Make the fake CAN controller driver available for use in tests outside of
the CAN shell test.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

drivers/can/CMakeLists.txt

@@ -4,6 +4,7 @@ zephyr_library()
 zephyr_sources_ifdef(CONFIG_CAN_MCUX_MCAN    can_mcux_mcan.c)
 
 zephyr_library_sources_ifdef(CONFIG_CAN              can_common.c)
+zephyr_library_sources_ifdef(CONFIG_CAN_FAKE         can_fake.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_LOOPBACK     can_loopback.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_MCAN         can_mcan.c)
 zephyr_library_sources_ifdef(CONFIG_CAN_MCP2515      can_mcp2515.c)

drivers/can/Kconfig

@@ -111,6 +111,7 @@ source "drivers/can/Kconfig.native_posix_linux"
 source "drivers/can/Kconfig.sja1000"
 source "drivers/can/Kconfig.esp32"
 source "drivers/can/Kconfig.kvaser"
+source "drivers/can/Kconfig.fake"
 
 source "drivers/can/transceiver/Kconfig"
 

drivers/can/Kconfig.fake

@@ -0,0 +1,13 @@
+# Fake CAN configuration options
+
+# Copyright (c) 2022 Vestas Wind Systems A/S
+# SPDX-License-Identifier: Apache-2.0
+
+config CAN_FAKE
+	bool "Fake CAN driver"
+	default y
+	depends on DT_HAS_ZEPHYR_FAKE_CAN_ENABLED
+	select CAN_HAS_CANFD
+	select CAN_HAS_RX_TIMESTAMP
+	help
+	  Enable support for the FFF-based fake CAN driver.

drivers/can/can_fake.c

@@ -6,15 +6,14 @@
 
 #include <zephyr/device.h>
 #include <zephyr/drivers/can.h>
+#include <zephyr/drivers/can/can_fake.h>
 #include <zephyr/fff.h>
 
 #ifdef CONFIG_ZTEST_NEW_API
 #include <zephyr/ztest.h>
 #endif /* CONFIG_ZTEST_NEW_API */
 
-#include "fake_can.h"
-
-#define DT_DRV_COMPAT test_fake_can
+#define DT_DRV_COMPAT zephyr_fake_can
 
 DEFINE_FAKE_VALUE_FUNC(int, fake_can_start, const struct device *);
 

dts/bindings/can/zephyr,fake-can.yaml

@@ -0,0 +1,10 @@
+# Copyright (c) 2022 Vestas Wind Systems A/S
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+    This binding provides a fake CAN controller for use as either a stub or a mock in Zephyr
+    testing.
+
+compatible: "zephyr,fake-can"
+
+include: can-fd-controller.yaml

tests/drivers/can/shell/Kconfig

@@ -1,13 +0,0 @@
-# Copyright (c) 2022 Vestas Wind Systems A/S
-# SPDX-License-Identifier: Apache-2.0
-
-config TEST_FAKE_CAN
-	bool
-	default y
-	depends on DT_HAS_TEST_FAKE_CAN_ENABLED
-	select CAN_HAS_RX_TIMESTAMP
-	select CAN_HAS_CANFD
-	help
-	  Enable support for the fake CAN driver.
-
-source "Kconfig.zephyr"

tests/drivers/can/shell/app.overlay

@@ -6,7 +6,7 @@
 
 /{
 	fake_can: fake_can {
-		compatible = "test-fake-can";
+		compatible = "zephyr,fake-can";
 		status = "okay";
 		sjw = <1>;
 		sample-point = <875>;

tests/drivers/can/shell/dts/bindings/test-fake-can.yaml

@@ -1,10 +0,0 @@
-# Copyright (c) 2022 Vestas Wind Systems A/S
-# SPDX-License-Identifier: Apache-2.0
-
-description: |
-    This binding provides resources required to build and run the
-    tests/drivers/can/shell test in Zephyr.
-
-compatible: "test-fake-can"
-
-include: can-fd-controller.yaml

tests/drivers/can/shell/src/main.c

@@ -4,11 +4,10 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#include "fake_can.h"
-
 #include <string.h>
 
 #include <zephyr/drivers/can.h>
+#include <zephyr/drivers/can/can_fake.h>
 #include <zephyr/fff.h>
 #include <zephyr/shell/shell.h>
 #include <zephyr/shell/shell_dummy.h>