CAN: Add QCanBusDeviceInfo

Returns:
* a list of available devices for the chosen plugin
* if the device is virtual
* if the device is CAN FD capable

Use this list in the CAN Example for interface selection.

If information about virtual channels or CAN FD capabability is not
available, false is returned.

For SocketCAN, PeakCAN, VectorCAN and SystecCAN, the implementation is
completed. TinyCAN only return the list of possible interfaces for now.
This is can be changed later, but needs quite some refactoring of the
TinyCAN plugin.

[ChangeLog][QtCanBus] Added the new class QCanBusDeviceInfo
for enumeration of available CAN interfaces and more information
about them.

Task-number: QTBUG-54298
Change-Id: I851bcc3b9ee41aaaf1164c6b4a5aaf6503cd8746
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

2 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/plugins/genericcanbus/main.cpp b/tests/auto/plugins/genericcanbus/main.cpp
index eb07dfa..46b21ac 100644
--- a/tests/auto/plugins/genericcanbus/main.cpp
+++ b/tests/auto/plugins/genericcanbus/main.cpp
@@ -38,6 +38,7 @@
 
 #include <QtSerialBus/qcanbus.h>
 #include <QtSerialBus/qcanbusfactory.h>
+#include "../../../../src/serialbus/qcanbusdeviceinfo_p.h"
 
 #include <QtCore/qfile.h>
 
@@ -50,6 +51,17 @@ class GenericBusPlugin : public QObject, public QCanBusFactory
     Q_INTERFACES(QCanBusFactory)
 
 public:
+    QList<QCanBusDeviceInfo> availableDevices(QString *errorMessage) const override
+    {
+        Q_UNUSED(errorMessage);
+
+        QCanBusDeviceInfoPrivate info;
+        info.name = QStringLiteral("can0");
+        info.hasFlexibleDataRate = true;
+        info.isVirtual = true;
+        return { QCanBusDeviceInfo(info) };
+    }
+
     QCanBusDevice *createDevice(const QString &interfaceName, QString *errorMessage) const override
     {
         if (interfaceName == QStringLiteral("invalid")) {
diff --git a/tests/auto/qcanbus/tst_qcanbus.cpp b/tests/auto/qcanbus/tst_qcanbus.cpp
index 63f98cc..fbab78a 100644
--- a/tests/auto/qcanbus/tst_qcanbus.cpp
+++ b/tests/auto/qcanbus/tst_qcanbus.cpp
@@ -48,6 +48,7 @@ public:
 private slots:
     void initTestCase();
     void plugins();
+    void interfaces();
     void createDevice();
 
 private:
@@ -83,6 +84,15 @@ void tst_QCanBus::plugins()
 
 }
 
+void tst_QCanBus::interfaces()
+{
+    const QList<QCanBusDeviceInfo> pluginList = bus->availableDevices("generic");
+    QCOMPARE(1, pluginList.size());
+    QCOMPARE(QString("can0"), pluginList.at(0).name());
+    QVERIFY(pluginList.at(0).isVirtual());
+    QVERIFY(pluginList.at(0).hasFlexibleDataRate());
+}
+
 void tst_QCanBus::createDevice()
 {
     QString error, error2;