On Fri, Feb 19, 2016 at 10:08:46AM +0100, Oleksij Rempel wrote: > i'm working on a project which depends on 5 Wire SPI communication. It > is probably identical to spi-davinci.c with SPI_READY signal. Only > difference is that SPI_READY is not supported by hardware, in this case > GPIO input is used. > Currently this project implements SPI_READY and CS on top of spidev > driver. What makes it really ugly, slow and complicated. > My question is, are there any better, upstreamable way to implement it? > For example directly insight of spi framework? Any suggestions and > comments are welcome. Unless the hardware support SPI_READY a GPIO is going to be as good as it gets I think, someone else might have better ideas but nothing springs to mind for me. I'd be OK with a GPIO based implementation in the core for systems that don't have hardware support for it but I don't see anything that'd be fundamentally better in terms of system performance right now.
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