import RT-Thread@9217865c without bsp, libcpu and components/net

components/drivers/misc/rt_dev_bus.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-10-13     flybreak     the first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#define DBG_TAG "dev_bus"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+#if defined(RT_USING_POSIX_DEVIO)
+#include <unistd.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <sys/ioctl.h>
+#include <dfs_file.h>
+
+static int bus_fops_open(struct dfs_file *fd)
+{
+    LOG_D("bus fops open");
+    return 0;
+}
+
+static int bus_fops_close(struct dfs_file *fd)
+{
+    LOG_D("bus fops close");
+    return 0;
+}
+
+static const struct dfs_file_ops bus_fops =
+{
+    bus_fops_open,
+    bus_fops_close,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+};
+#endif
+
+rt_device_t rt_device_bus_create(char *name, int attach_size)
+{
+    rt_err_t result = RT_EOK;
+    rt_device_t dev = rt_device_create(RT_Device_Class_Bus, 0);
+
+    result = rt_device_register(dev, name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE);
+    if (result < 0)
+    {
+        rt_kprintf("dev bus [%s] register failed!, ret=%d\n", name, result);
+        return RT_NULL;
+    }
+#if defined(RT_USING_POSIX_DEVIO)
+    dev->fops = &bus_fops;
+#endif
+
+    LOG_D("bus create");
+    return dev;
+}
+
+rt_err_t rt_device_bus_destroy(rt_device_t dev)
+{
+    rt_device_unregister(dev);
+    dev->parent.type = RT_Object_Class_Device;
+    rt_device_destroy(dev);
+    LOG_D("bus destroy");
+    return RT_EOK;
+}