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

[Stephen Warren]

On 01/22/2013 02:42 PM, Simon Glass wrote:
> Hi Stephen,
> 
> On Tue, Jan 22, 2013 at 1:26 PM, Stephen Warren <swarren at wwwdotorg.org> wrote:
>> 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
>>
> 
> OK thank you. So is your function only intended for use with T20?

No, I imagine that it should be used for all Tegras; I just wrote it
long enough ago that there was only Tegra20 at the time. I assume that
if Lucas wants to use this function as a pre-cursor to his NAND pinmux
change, he'll update it for whatever Tegra versions are checked in at
the time first.

Sorry, I'm being lazy/over-worked.