[Intel-gfx] [PATCH 00/10] drm/i915/spi: spi access for discrete graphics

[Winkler, Tomas]

> 
> On Wed, Sep 20, 2023 at 01:52:07PM +0000, Usyskin, Alexander wrote:
> 
> > I've tried to register spi controller with a spi-mem ops, but I can't find a way
> to connect to mtd subsystem.
> > I took spi-intel as example, which connects to spi-nor but it relies on JDEC ID
> of flash to configure itself.
> 
> You should use the normal SPI device registration interfaces to register
> whatever devices are connected to the SPI controller.  What in concrete terms
> have you tried to do here and in what way did it not work?

> 
> > We have predefined set of operations unrelated to flash behind the
> controller.
> 
> This sounds like there's some sort of MFD rather than or as well as a flash
> chip, or possibly multiple SPI devices?

Yes, the driver doesn't talk to SPI controller directly it goes via another layer, so all SPI standard HW is not accessible, but we wish to expose the MTD interface.

Thanks
Tomas