On Fri, Apr 12, 2019 at 05:02:10PM +1200, Chris Packham wrote: > Unfortunately recent changes have stopped my hacks from working. I've > tried adapting cs-gpios to work with my particular hardware but I came > to the realisation that the current cs-gpios support assumes a 1:1 > mapping of gpio to SPI device whereas my hardware used the state of the > gpio selecting the device i.e. a 1:2 mapping. > This is my attempt to implement a driver to deal with this. One nice > property is that it is pretty much self contained. The only change to > the core SPI infrastructure is exposing a function I needed to lookup > the spi_controller instance. Why not implement the device that demuxes the GPIOs you're using for chip select as a GPIO controller? Presumably it might get used for things other than chip selects.
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