linux-toradex.git/arch/powerpc/sysdev/qe_lib/gpio.c, branch v2.6.32.9

powerpc/qe_lib: Set gpio data before changing the direction to output

2009-08-26T02:08:45+00:00

This avoids having a short glitch if the desired initial value is not
the same as what was previously in the data register.

Signed-off-by: Michael Barkowski 
Acked-by: Anton Vorontsov 
Signed-off-by: Kumar Gala

powerpc/qe: Implement QE Pin Multiplexing API

2008-12-30T17:13:43+00:00

With this API we're able to set a QE pin to the GPIO mode or a dedicated
peripheral function.

The API relies on the fact that QE gpio controllers are registered. If
they aren't, the API won't work (gracefully though).

There is one caveat though: if anybody occupied the node->data before us,
or overwrote it, then bad things will happen. Luckily this is all in the
platform code that we fully control, so this should never happen.

I could implement more checks (for example we could create a list of
successfully registered QE controllers, and compare the node->data in the
qe_pin_request()), but this is unneeded if nobody is going to do silly
things behind our back.

Signed-off-by: Anton Vorontsov 
Signed-off-by: Kumar Gala

powerpc/QE: use arch_initcall to probe QUICC Engine GPIOs

2008-06-26T06:49:09+00:00

It was discussed that global arch_initcall() is preferred way to probe
QE GPIOs, so let's use it.

Signed-off-by: Anton Vorontsov 
Signed-off-by: Kumar Gala

powerpc/QE: implement support for the GPIO LIB API

2008-06-10T16:11:10+00:00

This is needed to access QE GPIOs via Linux GPIO API.

Signed-off-by: Anton Vorontsov 
Acked-By: Timur Tabi 
Signed-off-by: Kumar Gala