[U-Boot] [PATCH] tegra: implement pinmux_avoid_func()

[Stephen Warren]

On 01/22/2013 02:13 PM, Simon Glass wrote:
> Hi Stephen,
> 
> On Tue, Jan 22, 2013 at 8:21 AM, Stephen Warren <swarren at wwwdotorg.org> wrote:
>> From: Stephen Warren <swarren at nvidia.com>
>>
>> This selects the "safe" (non-conflicting) mux function for a pin group
>> if the current setting matches the specified function.
>>
>> Many signals can be routed to or from multiple different groups. Each
>> signal must be routed to or from only a single group at a given time.
>> Hence, if we program a particular group for a function, we must ensure
>> no other group is programmed to that same function first. This API
>> makes this easy.
> 
> What is the intended use of this function? (sorry, yes, I am confused :-)

It's a safer way of doing this:
"tegra: pinmux: fix FUNCMUX_NDFLASH_KBC_8_BIT"
http://lists.denx.de/pipermail/u-boot/2013-January/144612.html

i.e. it address the concerns I raised here:
http://lists.denx.de/pipermail/u-boot/2013-January/144713.html