diff options
Diffstat (limited to 'include/standard-headers/linux/virtio_i2c.h')
| -rw-r--r-- | include/standard-headers/linux/virtio_i2c.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/standard-headers/linux/virtio_i2c.h b/include/standard-headers/linux/virtio_i2c.h new file mode 100644 index 0000000000..09fa907793 --- /dev/null +++ b/include/standard-headers/linux/virtio_i2c.h @@ -0,0 +1,47 @@ +/* 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 "standard-headers/linux/const.h" +#include "standard-headers/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 { + uint16_t addr; + uint16_t padding; + uint32_t flags; +}; + +/** + * struct virtio_i2c_in_hdr - the virtio I2C message IN header + * @status: the processing result from the backend + */ +struct virtio_i2c_in_hdr { + uint8_t 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 */ |