On 9 May 2012 14:50, Heiko Stübner <he...@sntech.de> wrote: > Am Mittwoch, 9. Mai 2012, 00:04:51 schrieb Thomas Abraham: >> The set_level callback in the controller data, which is used to configure >> the slave select line, cannot be supported when migrating the driver to >> device tree based discovery. Since all the platforms currently use gpio >> as the slave select line, this callback can be removed from the >> controller data and replaced with call to gpio_set_value in the driver. > > I was quite fond of the set_level callback. On one of the machines I'm working > on there is some sort of multiplexer (TI-sn74cbtlv3257) sitting between the > controller and spi devices to provide support for more than one device. > So I was doing the switch to the correct device in the set_level callback, > which worked quite well. > I suppose you should still be able to do that defining virtual gpios backed by appropriate physical mux'ing of lines ?
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