[PATCH v2 1/4] spi: imx: GPIO based chip selects should not be required

Mark Brown broonie at kernel.org
Tue Oct 31 04:19:19 PDT 2017


On Thu, Oct 26, 2017 at 06:08:38PM -0700, Trent Piepho wrote:
> The driver will fail to load if no gpio chip selects are specified,
> this patch changes this so that it no longer fails.
> 
> It's possible to use all native chip selects, in which case there is
> no reason to have a gpio chip select array.  This is what happens if
> the *optional* device tree property "cs-gpios" is omitted.

Do the native chip selects actually work usefully on this hardware?
There used to be problems with it wanting to do things like bounce the
chip select on every word which made it extremely difficult to use with
Linux.
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