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SubjectRe: SPI-4 device support on linux
Date writes:

> Hello,
> We have been evaluating a project to develop linux driver
> and stack for SPI-4 devices. SPI-4 stands for System Packet Interface
> Level 4.
> While searching on internet I came across a few articles on SPI-4 protocol.
> One of the links is given below:
> Is there any update on linux driver support for SPI-4 devices?

You can get the specifications for the SPI family of interfaces at . However, it is an
electrical (physical and link layer) interface. It does not specify a
host interface, since the interesting feature of most devices is not
an SPI-4 interface.

There may be cards out there that do have SPI-4 interfaces and Linux
drivers, but the two are not necessarily related: the likely problem
areas for a device driver are those shared with any 10 Gbit card, and
are not specific to SPI-4 cards.

Michael Poole
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