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

[Charles Perry]

On Feb 2, 2024, at 3:16 PM, Rob Herring robh@xxxxxxxxxx wrote:
> 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

Ok, will do.

Regards,
Charles