[RFC] GPIO-based flow control in the cpm_uart driver

Laurent Pinchart laurentp at cse-semaphore.com
Tue May 20 23:00:35 EST 2008

On Tuesday 20 May 2008 02:31, David Brownell wrote:
> On Tuesday 15 April 2008, Laurent Pinchart wrote:
> > Or maybe some kind of gpio_set_option() with flags specific to the 
> > controller ? This could be used to enable open-drain outputs or internal 
> > pull-ups for instance.
> That presumes that the pin config is associated with the GPIO
> controller, rather than being an independent modules...
> In the cases that a platform has such an association, there
> should be no problem just using a platform-specific code to
> do the relevant magic.

To call GPIO chip specific functions, the driver needs a way to get the GPIO 
chip associated with the GPIO.

Laurent Pinchart
CSE Semaphore Belgium

Chaussee de Bruxelles, 732A
B-1410 Waterloo

T +32 (2) 387 42 59
F +32 (2) 387 42 75
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