On 01/22/2013 02:42 PM, Simon Glass wrote:
Hi Stephen,
On Tue, Jan 22, 2013 at 1:26 PM, Stephen Warren swarren@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@wwwdotorg.org wrote:
From: Stephen Warren swarren@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.