linux-kernel - Re: [PATCH v5 0/2] Lattice ECP5 FPGA manager

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Message-ID: <20220721074431.GA1712998@yilunxu-OptiPlex-7050>
Date:   Thu, 21 Jul 2022 15:44:31 +0800
From:   Xu Yilun <yilun.xu@...el.com>
To:     Ivan Bornyakov <i.bornyakov@...rotek.ru>
Cc:     mdf@...nel.org, hao.wu@...el.com, trix@...hat.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-fpga@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, system@...rotek.ru
Subject: Re: [PATCH v5 0/2] Lattice ECP5 FPGA manager

On Tue, Jul 19, 2022 at 02:23:33PM +0300, Ivan Bornyakov wrote:
> Add support to the FPGA manager for programming Lattice ECP5 FPGA over
> slave SPI interface with .bit formatted uncompressed bitstream image.

I didn't have time to looking into the patches yet, but I have some quick
question.

Where is the bitstream data writing to? To the FPGA active region or the
backup nvmem like flash?

After reconfiguration, how to re-enumerate the hardware devices in the
newly programmed FPGA region?

Thanks,
Yilun

> 
> ChangeLog:
>   v1 -> v2:
>     * remove "spi" from compatible string
>     * reword description in dt-bindings doc
>     * add reference to spi-peripheral-props.yaml in dt-binding doc
>     * fix DTS example in dt-bindings doc: 4-spaces indentations, no
>       undersores in node names.
>   v2 -> v3:
>     * fix typo "##size-cells" -> "#size-cells" in dt-bindings example
>   v3 -> v4:
>     * dt-bindings: reword description
>     * dt-bindings: revert props order
>   v4 -> v5:
>     * dt-bindings: remove trailing dot from title
>     * dt-bindings: reword description to avoid driver reference
>     * dt-bindings: add "Reviewed-by: Krzysztof Kozlowski" tag
> 
> Ivan Bornyakov (2):
>   fpga: ecp5-spi: add Lattice ECP5 FPGA manager
>   dt-bindings: fpga: add binding doc for ecp5-spi fpga mgr
> 
>  .../bindings/fpga/lattice,ecp5-fpga-mgr.yaml  |  74 +++++
>  drivers/fpga/Kconfig                          |   7 +
>  drivers/fpga/Makefile                         |   1 +
>  drivers/fpga/ecp5-spi.c                       | 275 ++++++++++++++++++
>  4 files changed, 357 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/fpga/lattice,ecp5-fpga-mgr.yaml
>  create mode 100644 drivers/fpga/ecp5-spi.c
> 
> -- 
> 2.37.1
>