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/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */
/*
* Definitions for virtio I2C Adpter
*
* Copyright (c) 2021 Intel Corporation. All rights reserved.
*/
#ifndef _LINUX_VIRTIO_I2C_H
#define _LINUX_VIRTIO_I2C_H
#include <linux/const.h>
#include <linux/types.h>
/* Virtio I2C Feature bits */
#define VIRTIO_I2C_F_ZERO_LENGTH_REQUEST 0
/* The bit 0 of the @virtio_i2c_out_hdr.@flags, used to group the requests */
#define VIRTIO_I2C_FLAGS_FAIL_NEXT _BITUL(0)
/* The bit 1 of the @virtio_i2c_out_hdr.@flags, used to mark a buffer as read */
#define VIRTIO_I2C_FLAGS_M_RD _BITUL(1)
/**
* struct virtio_i2c_out_hdr - the virtio I2C message OUT header
* @addr: the controlled device address
* @padding: used to pad to full dword
* @flags: used for feature extensibility
*/
struct virtio_i2c_out_hdr {
__le16 addr;
__le16 padding;
__le32 flags;
};
/**
* struct virtio_i2c_in_hdr - the virtio I2C message IN header
* @status: the processing result from the backend
*/
struct virtio_i2c_in_hdr {
__u8 status;
};
/* The final status written by the device */
#define VIRTIO_I2C_MSG_OK 0
#define VIRTIO_I2C_MSG_ERR 1
#endif /* _LINUX_VIRTIO_I2C_H */