linux-headers (unknown)

Browse
Build Log
Usage
       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 */