Seeking Guidance for New SPI Driver in Mainline Linux Kernel

Raul Piper raulpblooper at
Fri Aug 18 09:58:30 EDT 2023

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

On Fri, 18 Aug 2023 at 6:40 PM, Muni Sekhar <munisekharrms at> 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
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