[virtio-dev][PATCH V10 0/2] virtio-spi: add virtual SPI controller

[Haixu Cui <quic_haixcui@quicinc.com>]

The Virtio SPI (Serial Peripheral Interface) device is a virtual SPI controller that
allows the driver to operate and use the SPI controller under the control of the host,
either a physical SPI controller, or an emulated one.

changelog:
=========
v9->v10:
- add explanation of CPHA and CPOL
- update the statement of bits_per_word_mask when it is set as 0
- add spi device and driver conformance in conformance.tex

v8->v9:
- add explanation of bits_per_word_mask in config space

v7->v8:
- change device to host

v6->v7:
- fix the format problems and syntax problems

v5->v6:
- use driver/device instead guest/host
- add the definition of some terminologies
- use controller instead of master throughout the spec
- add buffer length validation for full-duplex transfer

v4->v5:
- use controller instead of master
- fix indentation issue
- extend the config space to expose the backend supported features
- add another result value to indicate parameter error
- add device and driver requirement about parameter checking

v3->v4:
- fix the spell errors
- bus_num is not SOC-specific, remove it
- add driver requirement to deal with the situation that the cs delay
parameters are not 0 but the backend doesn't support cs timing setting

v2->v3
- remove unnecessary statements and driver implementation details
- add the parameters about cs timing delay and transfer delay
- use "le32" instead of "u32"
- swap the rx_buf and tx_buf in the request format
- add the parameters about transfer bit width

v1->v2:
- explain SPI when it is firstly used
- update the ambiguous expression of virtqueue

v0->v1:
- add definition of abbreviation SPI
- remove the ID

Haixu Cui (2):
  content: Rename SPI master to SPI controller
  virtio-spi: add the device specification

 conformance.tex                         |  12 +-
 content.tex                             |   3 +-
 device-types/spi/description.tex        | 286 ++++++++++++++++++++++++
 device-types/spi/device-conformance.tex |   7 +
 device-types/spi/driver-conformance.tex |   7 +
 5 files changed, 310 insertions(+), 5 deletions(-)
 create mode 100644 device-types/spi/description.tex
 create mode 100644 device-types/spi/device-conformance.tex
 create mode 100644 device-types/spi/driver-conformance.tex

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2.17.1