Re: [PATCH 0/3] fpga: xilinx-selectmap: add new driver

[Rob Herring <robh@kernel.org>]

On Wed, Jan 31, 2024 at 06:05:30PM -0500, Charles Perry wrote:
> Hello,
> 
> This patchset adds a new driver for the 7 series FPGA's SelectMAP
> interface.
> 
> The SelectMAP interface shares a common GPIO protocol with the SPI
> interface which is already in the kernel (drivers/fpga/xilinx-spi.c).
> The approach proposed in this patchset is to refactor xilinx-spi.c into
> xilinx-core.c which would handle the common GPIO protocol. This is then
> used to build two drivers, the already existing xilinx-spi.c driver and
> a newly added xilinx-selectmap.c driver.
> 
> The SelectMAP driver proposed only supports 8 bit mode. This is because
> the 16 and 32 bits mode have limitations with regards to compressed
> bitstream support as well as introducing endianness considerations.
> 
> I'm testing xilinx-selectmap.c on a custom i.MX6 board connected to an
> Artix 7 FPGA. Flashing a 913K bitstream takes 0.44 seconds.
> 
> v2: From Krzysztof Kozlowski review's:
>   * Use more conventional names for gpio DT bindings
>   * fix example in DT bindings
>   * add mc-peripheral-props.yaml to DT bindings
>   * fix various formatting mistakes
>   * Remove all occurences of the "slave" word.

Please label the series with the version number and don't send new 
versions as replies to the previous version.

Rob