Re: [PATCH] pinctrl: document the pinctrl PM states

From: Linus Walleij
Date: Mon Jun 17 2013 - 12:05:28 EST

On Mon, Jun 17, 2013 at 9:20 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote:

> First, I think the concept of remuxing (or even checking) _all_ the pins
> for a consumer device is wrong on most if not all hardware. For past 10
> years I have not seen a case where _all_ the pins for a device would need
> to be remuxed for any reason.

We may be talking past each other here. On the ux500 we use a lot
of runtime pincontrol, but none of this is *remuxing*.

We are only *reconfiguring*.

Now I know that Haojian only recently added pin config to the
pinctrl-single.c driver so maybe you have mostly seen muxing
in your driver so far, so you view of the world is a bit different.

On the Nomadik pin controller we do mostly hogged muxing
at boot time, but a lot of runtime reconfiguration. So our
needs are very different.

Bear in mind that struct pinctl * forks effects in two paths,
one is muxing the other is config, like pull-ups etc.

Linus Walleij
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