[DM/FEATURE] Support IIO (Industrial I/O) (#9598)

[DM/FEATURE] Support IIO (Industrial I/O)

Signed-off-by: GuEe-GUI <2991707448@qq.com>

components/drivers/include/drivers/iio.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-3-08      GuEe-GUI     the first version
+ */
+
+#ifndef __IIO_H__
+#define __IIO_H__
+
+void *rt_iio_channel_get_by_index(struct rt_device *dev, int index, int *out_channel);
+void *rt_iio_channel_get_by_name(struct rt_device *dev, const char *name, int *out_channel);
+
+#endif /* __IIO_H__ */

components/drivers/include/rtdevice.h

@@ -49,6 +49,8 @@ extern "C" {
 #include "drivers/blk.h"
 #endif
 
+#include "drivers/iio.h"
+
 #ifdef RT_USING_OFW
 #include "drivers/ofw.h"
 #include "drivers/ofw_fdt.h"