[PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers

Thomas Petazzoni [off-list ref] writes:

Le Thu, 05 Jul 2012 12:11:40 +0200,
Arnaud Patard (Rtp) [off-list ref] a ?crit :

quoted

quoted

You are not the only one working in this area. Arnaud Patard said he
was look at this as well. 

yeah, but tbh I've not made anything yet. If Thomas has already some
code for it, we should try to make it "generic" so as to use it on
armada xp and orion platforms.

The MPP registers are identical on Armada XP/370 and 88F6281 (not sure
which other SoC datasheet I should be checking). Basically, it's just a
range of contiguous registers, with 4 bits per pin to select the
function.

iirc, other SoCs are similar. The small exception being dove I
guess. Dove has a 3rd gpo [the gpios are output only] bank but to be
used as gpio require that a special bit is set and it's for all gpios of
this bank. You'll find this bit in the "general mpp configuration
register" if you look at the datasheet.

So my pinmux driver should simply work as is for Orion as well. The
only difference between platforms is the number of MPP pins that are
available, but this number also varies between versions of Armada XP
and Armada 370, so I already support this in the driver.

Are there some output-only gpio on armada xp/370 like on kirkwood/dove ?


Arnaud