linux-kernel - Re: [PATCH 0/4]Add afi config drivers support

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Date:   Sat, 27 Aug 2022 14:02:56 +0800
From:   Xu Yilun <yilun.xu@...el.com>
To:     Nava kishore Manne <nava.kishore.manne@....com>
Cc:     git@....com, robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        michal.simek@...inx.com, mdf@...nel.org, hao.wu@...el.com,
        trix@...hat.com, p.zabel@...gutronix.de,
        gregkh@...uxfoundation.org, ronak.jain@...inx.com,
        rajan.vaja@...inx.com, abhyuday.godhasara@...inx.com,
        piyush.mehta@...inx.com, lakshmi.sai.krishna.potthuri@...inx.com,
        harsha.harsha@...inx.com, linus.walleij@...aro.org,
        nava.manne@...inx.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-fpga@...r.kernel.org
Subject: Re: [PATCH 0/4]Add afi config drivers support

On 2022-08-24 at 09:25:38 +0530, Nava kishore Manne wrote:
> Xilinx SoC platforms (Zynq and ZynqMP) connect the PS to the programmable

Could you help explain what is PS?

Thanks,
Yiljn

> logic (PL) through the AXI port.This AXI port helps to establish the data
> path between the PS and PL. In-order to establish the proper communication
> data path between PS and PL the AXI port data path should be configured
> with the proper Bus-width values and it will also handle the PS-PL reset
> signals to reset the PL domain.
> 
> This patch series adds afi config drivers support to handle the PS-PL
> resets and AXI port bus-width configurations.
> 
> Nava kishore Manne (4):
>   firmware: xilinx: Add afi ioctl support
>   bindings: fpga: Add binding doc for the zynqmp afi config driver
>   bindings: firmware: Update binding doc for the zynqmp afi config node
>   fpga: zynqmp: Add afi config driver
> 
>  .../firmware/xilinx/xlnx,zynqmp-firmware.yaml |   7 +
>  .../bindings/fpga/xlnx,zynqmp-afi-fpga.yaml   | 100 +++++++++
>  MAINTAINERS                                   |   6 +
>  drivers/firmware/xilinx/zynqmp.c              |  14 ++
>  drivers/fpga/Kconfig                          |  13 ++
>  drivers/fpga/Makefile                         |   1 +
>  drivers/fpga/zynqmp-afi.c                     | 211 ++++++++++++++++++
>  include/linux/firmware/xlnx-zynqmp.h          |  36 +++
>  8 files changed, 388 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/fpga/xlnx,zynqmp-afi-fpga.yaml
>  create mode 100644 drivers/fpga/zynqmp-afi.c
> 
> -- 
> 2.25.1
>