On Mon, Jul 28, 2014 at 08:25:14AM +0200, Sebastian Hesselbarth wrote: > So, "num-cs" describes the number of *available* chip select signals. As > they can comprise extra cs lines that are GPIO and not dedicated > controller signals (native above), it cannot be something the driver > knows.
Yes, indeed. Though given that we also need a way to pass in the GPIOs for the chip selects which isn't standardised at the minute it's all a bit of a mess right now. > As long as you only use native cs lines, omit the cs-gpios property, if > there is any GPIO cs lines, insert <0> where you want native ones. Right, something like that should be usable. We also need a way to say which native chip select to set when using a GPIO chip select if the GPIO chip selects go beyond the native ones and none of the native ones are masked by GPIOs. > Although, I wonder how the driver learns about reg = <1> is actually the > controller's cs0 in the example above? Interesting question...
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