[PATCH v2 1/2] MIPI I3c HCI (Host Controller Interface) driver

[Nicolas Pitre]

Of course subject prefix should have been "[PATCH v2 0/2]" here.

On Tue, 18 Aug 2020, Nicolas Pitre wrote:

> The MIPI I3C HCI (Host Controller Interface) specification defines
> a common software driver interface to support compliant MIPI I3C
> host controller hardware implementations from multiple vendors. This
> is the initial Linux driver implementing support for this specification.
> 
> Due to limitations in the I3C subsystem, this driver doesn't implement
> everything the spec specifies. For example, scheduled commands,
> auto-commands and NCM are major features not yet supported.
> 
> There are different revisions of the spec: v1.0, v1.1 (to be released
> imminently), and 2.0 (still under active development). All of them are
> supported with varying degree due to the above. And of course v2 support
> is likely to change as the spec is finalized, but it is included now
> in its preliminary form as all I have for testing at the moment is based
> on an early v2 draft.
> 
> Even v1.0 hardware is still scarse so it hasn't been tested yet. As more
> hardware becomes available for testing it is expected that adjustments
> will be needed on top of this submission. But it is best to have the
> current code merged earlier so it gains better exposure for future
> contributions.
> 
> Feedback appreciated.
> 
> Changes from v1:
> 
> - moved DT binding to schema format (Rob)
> - fix sparse warnings (kernel test robot)
> - fix build warnings on 32-bit targets (kernel test robot)
> - avoid PIO_OFFSET symbol conflict (kernel test robot)
> - minor cosmetic changes
> 
> diffstat:
> 
>  .../devicetree/bindings/i3c/mipi-i3c-hci.yaml   |  41 +
>  drivers/i3c/master/Kconfig                      |  13 +
>  drivers/i3c/master/Makefile                     |   1 +
>  drivers/i3c/master/mipi-i3c-hci/Makefile        |   9 +
>  drivers/i3c/master/mipi-i3c-hci/cmd.h           | 106 ++
>  drivers/i3c/master/mipi-i3c-hci/cmd_v1.c        | 362 +++++++
>  drivers/i3c/master/mipi-i3c-hci/cmd_v2.c        | 280 +++++
>  drivers/i3c/master/mipi-i3c-hci/core.c          | 801 +++++++++++++++
>  drivers/i3c/master/mipi-i3c-hci/dat.h           |  28 +
>  drivers/i3c/master/mipi-i3c-hci/dat_v1.c        | 170 ++++
>  drivers/i3c/master/mipi-i3c-hci/dct.h           |  16 +
>  drivers/i3c/master/mipi-i3c-hci/dct_v1.c        |  36 +
>  drivers/i3c/master/mipi-i3c-hci/debug.c         |  79 ++
>  drivers/i3c/master/mipi-i3c-hci/debug.h         |  17 +
>  drivers/i3c/master/mipi-i3c-hci/dma.c           | 781 ++++++++++++++
>  drivers/i3c/master/mipi-i3c-hci/ext_caps.c      | 249 +++++
>  drivers/i3c/master/mipi-i3c-hci/ext_caps.h      |  19 +
>  drivers/i3c/master/mipi-i3c-hci/hci.h           | 150 +++
>  drivers/i3c/master/mipi-i3c-hci/ibi.h           |  42 +
>  drivers/i3c/master/mipi-i3c-hci/pio.c           | 961 ++++++++++++++++++
>  20 files changed, 4161 insertions(+)
> 
> 
>