Where Online Learning is simpler!

The C and C++ Include Header Files

/usr/include/linux/virtio_i2c.h


$ cat -n /usr/include/linux/virtio_i2c.h

     1	/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */
     2	/*
     3	 * Definitions for virtio I2C Adpter
     4	 *
     5	 * Copyright (c) 2021 Intel Corporation. All rights reserved.
     6	 */
     7	
     8	#ifndef _LINUX_VIRTIO_I2C_H
     9	#define _LINUX_VIRTIO_I2C_H
    10	
    11	#include <linux/const.h>
    12	#include <linux/types.h>
    13	
    14	/* Virtio I2C Feature bits */
    15	#define VIRTIO_I2C_F_ZERO_LENGTH_REQUEST	0
    16	
    17	/* The bit 0 of the @virtio_i2c_out_hdr.@flags, used to group the requests */
    18	#define VIRTIO_I2C_FLAGS_FAIL_NEXT	_BITUL(0)
    19	
    20	/* The bit 1 of the @virtio_i2c_out_hdr.@flags, used to mark a buffer as read */
    21	#define VIRTIO_I2C_FLAGS_M_RD		_BITUL(1)
    22	
    23	/**
    24	 * struct virtio_i2c_out_hdr - the virtio I2C message OUT header
    25	 * @addr: the controlled device address
    26	 * @padding: used to pad to full dword
    27	 * @flags: used for feature extensibility
    28	 */
    29	struct virtio_i2c_out_hdr {
    30		__le16 addr;
    31		__le16 padding;
    32		__le32 flags;
    33	};
    34	
    35	/**
    36	 * struct virtio_i2c_in_hdr - the virtio I2C message IN header
    37	 * @status: the processing result from the backend
    38	 */
    39	struct virtio_i2c_in_hdr {
    40		__u8 status;
    41	};
    42	
    43	/* The final status written by the device */
    44	#define VIRTIO_I2C_MSG_OK	0
    45	#define VIRTIO_I2C_MSG_ERR	1
    46	
    47	#endif /* _LINUX_VIRTIO_I2C_H */