[PATCH v2 0/5] Create FPGA Partial Reconfiguration (fpga pr) command

[Simon Glass]

Hi Naresh,

On Sat, 24 May 2025 at 21:37, Naresh Kumar Ravulapalli
<nareshkumar.ravulapalli at altera.com> wrote:
>
> Partial Reconfiguration (pr) FPGA command is added to U-Boot console.
> The "fpga pr" command supports multiple regions for partial
> reconfiguration by specifying the region number. The implementation
> of the command is specific to the underlying FPGA device.
>
> In case of Altera, it is used to freeze the specified partial
> reconfiguration region, then user loading the reconfiguration image
> followed by unfreezing of the region.
>
> Test set currently can't be added as the command is implementation
> specific. It involves opening of FPGA bridges and loading of external
> images during run time. Currently, existing FPGA commands don't
> have any tests/sandbox environment. The design is being worked on,
> but would take some more time to share and get the community
> feedback.
>
> Changes in v2:
> - Change the command implementation to generic FPGA command
> - Add usage documentation for the command
> - Correct "_" with "-" in alias name in Altera dts files
> - Add FPGA partial reconfiguration support for Altera devices
> - Address minor comments in v1
>
> Naresh Kumar Ravulapalli (5):
>   drivers: fpga: Add generic partial reconfiguration support
>   cmd: Add partial reconfiguration command
>   doc: usage: cmd: Add documentation for fpga pr command
>   arch: arm: dts: Correct alias name for Altera SoCs
>   drivers: fpga: Add partial reconfig support for Altera SoCs
>
>  .../arm/dts/socfpga_agilex5_socdk-u-boot.dtsi |   2 +-
>  arch/arm/dts/socfpga_agilex_socdk-u-boot.dtsi |   3 +-
>  .../dts/socfpga_stratix10_socdk-u-boot.dtsi   |   3 +-
>  cmd/Kconfig                                   |   8 +
>  cmd/fpga.c                                    |  38 ++++
>  doc/usage/cmd/fpga.rst                        |  65 +++++++
>  drivers/fpga/Kconfig                          |   7 +
>  drivers/fpga/altera.c                         | 163 ++++++++++++++++++
>  drivers/fpga/fpga.c                           |  37 ++++
>  include/altera.h                              |   7 +
>  include/fpga.h                                |   3 +
>  11 files changed, 333 insertions(+), 3 deletions(-)
>  create mode 100644 doc/usage/cmd/fpga.rst
>
> --
> 2.35.3
>

How about creating a uclass for FPGA, with an API? I think it would
help to make things more uniform.

Regards,
Simon