Re: [PATCH v1 2/2] spi: cadence-qspi: Add QSPI support for Intel LGM SoC

[Mark Brown]

On Wed, Sep 18, 2019 at 01:59:06PM +0800, Ramuthevar, Vadivel MuruganX wrote:
> On 17/9/2019 11:36 PM, Mark Brown wrote:
> > On Tue, Sep 17, 2019 at 10:11:28AM +0800, Ramuthevar, Vadivel MuruganX wrote:

> > > *    spi-cadence.c* in *drivers/spi/*, which supports very old legacy
> > > cadence-spi based devices(normal)
> > > *    cadence-quadspi.c(drivers/mtd/spi-nor/)* : specific support to SPI-NOR
> > > flash with new spi-nor layer.
> > >      all the API's in this driver purely on spi-nor specific, so couldn't
> > > proceed to adapt.

> > Are these completely separate IPs or are they just different versions of
> > the same IP?

> These are same IPs , but different features Enabled/Disabled depends upon
> the SoC vendors.

> for e.g: Intel LGM SoC uses the same IP, but without DMA and Direct access
> controller.

> also dedicated support to flash devices.

If it's different versions of the same IP then everything should be in
one driver with the optional features enabled depending on what's in a
given system.

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