Hi Mark On Wed, May 13, 2020 at 03:20:50PM +0100, Mark Brown wrote: > On Wed, May 13, 2020 at 04:00:22PM +0200, Lars Povlsen wrote: > > With this change a SPI controller can be added without having a IRQ > > associated, and causing all transfers to be polled. For SPI controllers > > without DMA, this can significantly improve performance by less > > interrupt handling overhead. > > This overlaps substantially with some work that Serge Semin (CCed) has > in progress, please coordinate with him. Thanks for copying me these mails. I haven't been Cc'ed in the series and hasn't been subscribed to the SPI mailing list, so I would have definitely missed that. I would like to coordinate my efforts with Lars. I'll have the patchset reviewed soon in addition providing my comments/suggestions of how to make it useful for both mine and Lars solution. One thing I can tell about the mem_ops he implemented, is that they aren't mem_ops, but dirmap (as you remember it's also implemented in my code, but with alignment specific), and the exec_mem_op partly consists of a code, which belong to the supports_op() callback. The rest of my comments will be inlined in the patches. -Sergey
