Seeking Guidance for New SPI Driver in Mainline Linux Kernel

Seeking Guidance for New SPI Driver in Mainline Linux Kernel

[Muni Sekhar]

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Dear Linux Kernel Community,

I hope this email finds you well.
I am writing to seek your guidance and assistance regarding the development
of a new SPI device driver for our hardware system.
Our hardware, implemented on an FPGA, features an SPI interface that acts
as a Master, offering two distinct modes for data transmission and
reception.
This hardware is connected to the Linux system via the PCIe bus.
This hardware offers two modes for communication: using registers for
debugging purposes and utilizing DMA channels for high-bandwidth
applications. Both modes leverage the PCIe interface for data exchange.
The hardware boasts several noteworthy features, including support for
multiple speed settings, SPI port switching, configurable sample edge
programming, and adjustable SPI transfer sizes.

As we embark on the task of developing a device driver for this SPI
interface, we intend to follow best practices and leverage existing
resources within the Mainline Linux kernel tree. To achieve this, we plan
to refer to and adapt existing SPI drivers.
We kindly request your recommendations on which existing SPI driver within
the Mainline Linux kernel tree would serve as the most suitable reference
for our endeavor. Your invaluable expertise would greatly aid us in
ensuring the success of this driver development process.
Thank you for your time and consideration. We eagerly anticipate your
guidance and insights.

Warm regards,
Sekhar

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Re: Seeking Guidance for New SPI Driver in Mainline Linux Kernel

[Muni Sekhar]

In the previous email, I mentioned that the FPGA hardware(SPI block)
was connected to the Linux system using the PCIe interface. Here, when
I refer to the Linux system, I mean an x86-based Linux system, not an
ARM-based embedded system.

On Fri, Aug 18, 2023 at 7:28 PM Raul Piper <raulpblooper@gmail.com> wrote:
>
> Have you gone through the bindings documentation for spi driver?
> What are the pin configuration for your hardware sli?
> Br
>
> On Fri, 18 Aug 2023 at 6:40 PM, Muni Sekhar <munisekharrms@gmail.com> wrote:
>>
>> Dear Linux Kernel Community,
>>
>> I hope this email finds you well.
>> I am writing to seek your guidance and assistance regarding the
>> development of a new SPI device driver for our hardware system.
>> Our hardware, implemented on an FPGA, features an SPI interface that
>> acts as a Master, offering two distinct modes for data transmission
>> and reception.
>> This hardware is connected to the Linux system via the PCIe bus.
>> This hardware offers two modes for communication: using registers for
>> debugging purposes and utilizing DMA channels for high-bandwidth
>> applications. Both modes leverage the PCIe interface for data
>> exchange.
>> The hardware boasts several noteworthy features, including support for
>> multiple speed settings, SPI port switching, configurable sample edge
>> programming, and adjustable SPI transfer sizes.
>>
>> As we embark on the task of developing a device driver for this SPI
>> interface, we intend to follow best practices and leverage existing
>> resources within the Mainline Linux kernel tree. To achieve this, we
>> plan to refer to and adapt existing SPI drivers.
>> We kindly request your recommendations on which existing SPI driver
>> within the Mainline Linux kernel tree would serve as the most suitable
>> reference for our endeavor. Your invaluable expertise would greatly
>> aid us in ensuring the success of this driver development process.
>> Thank you for your time and consideration. We eagerly anticipate your
>> guidance and insights.
>>
>> Warm regards,
>> Sekhar
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies@kernelnewbies.org
>> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies



-- 
Thanks,
Sekhar

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Re: Seeking Guidance for New SPI Driver in Mainline Linux Kernel

[Raul Piper]

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Have you gone through the bindings documentation for spi driver?
What are the pin configuration for your hardware sli?
Br

On Fri, 18 Aug 2023 at 6:40 PM, Muni Sekhar <munisekharrms@gmail.com> wrote:

> Dear Linux Kernel Community,
>
> I hope this email finds you well.
> I am writing to seek your guidance and assistance regarding the
> development of a new SPI device driver for our hardware system.
> Our hardware, implemented on an FPGA, features an SPI interface that
> acts as a Master, offering two distinct modes for data transmission
> and reception.
> This hardware is connected to the Linux system via the PCIe bus.
> This hardware offers two modes for communication: using registers for
> debugging purposes and utilizing DMA channels for high-bandwidth
> applications. Both modes leverage the PCIe interface for data
> exchange.
> The hardware boasts several noteworthy features, including support for
> multiple speed settings, SPI port switching, configurable sample edge
> programming, and adjustable SPI transfer sizes.
>
> As we embark on the task of developing a device driver for this SPI
> interface, we intend to follow best practices and leverage existing
> resources within the Mainline Linux kernel tree. To achieve this, we
> plan to refer to and adapt existing SPI drivers.
> We kindly request your recommendations on which existing SPI driver
> within the Mainline Linux kernel tree would serve as the most suitable
> reference for our endeavor. Your invaluable expertise would greatly
> aid us in ensuring the success of this driver development process.
> Thank you for your time and consideration. We eagerly anticipate your
> guidance and insights.
>
> Warm regards,
> Sekhar
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>

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Seeking Guidance for New SPI Driver in Mainline Linux Kernel

[Muni Sekhar]

Dear Linux Kernel Community,

I hope this email finds you well.
I am writing to seek your guidance and assistance regarding the
development of a new SPI device driver for our hardware system.
Our hardware, implemented on an FPGA, features an SPI interface that
acts as a Master, offering two distinct modes for data transmission
and reception.
This hardware is connected to the Linux system via the PCIe bus.
This hardware offers two modes for communication: using registers for
debugging purposes and utilizing DMA channels for high-bandwidth
applications. Both modes leverage the PCIe interface for data
exchange.
The hardware boasts several noteworthy features, including support for
multiple speed settings, SPI port switching, configurable sample edge
programming, and adjustable SPI transfer sizes.

As we embark on the task of developing a device driver for this SPI
interface, we intend to follow best practices and leverage existing
resources within the Mainline Linux kernel tree. To achieve this, we
plan to refer to and adapt existing SPI drivers.
We kindly request your recommendations on which existing SPI driver
within the Mainline Linux kernel tree would serve as the most suitable
reference for our endeavor. Your invaluable expertise would greatly
aid us in ensuring the success of this driver development process.
Thank you for your time and consideration. We eagerly anticipate your
guidance and insights.

Warm regards,
Sekhar

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