Re: [PATCH 2/2] spi: Add Baikal-T1 System Boot SPI Controller driver

[Mark Brown]

On Fri, May 08, 2020 at 01:15:41PM +0300, Serge Semin wrote:
> On Fri, May 08, 2020 at 01:03:11PM +0300, Andy Shevchenko wrote:

> > > slave device. Taking into account the peculiarities of the controller
> > > registers and physically mapped SPI flash access, very limited resources
> > > and seeing the normal usecase of the controller is to access an external
> > > SPI-nor flash, we decided to create a dedicated SPI driver for it.

> > It seems a lot of code.
> > Why can't you use spi-dw-mmio.c et al.?

> I said above why. Even though the registers set is similar It's too specific
> to be integrated into the generic DW SSI driver.

Can you be more specific about the issues?  From what you wrote it
sounded like the main thing was chip select handling.

> > > The driver provides callbacks for native messages-based SPI interface,
> > > SPI-memory and direct mapping read operations. Due to not having any
> > > asynchronous signaling interface provided by the core we have no choice

What do you mean by "asynchronous signaling interface provided by the
core" here?

Attachment: signature.asc
Description: PGP signature