linux-kernel - Re: [PATCH v2 0/2] pinctrl: Intel Cherryview/Braswell support

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Date:	Thu, 6 Nov 2014 20:30:23 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Timur Tabi <timur@...eaurora.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Ning Li <ning.li@...el.com>, Alan Cox <alan@...ux.intel.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/2] pinctrl: Intel Cherryview/Braswell support

On Tue, Nov 4, 2014 at 8:04 PM, Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:

> We still need to account the fact that BIOS is supposed to configure the
> pins in advance. The pinctrl mappings are just for refining that, like
> muxing out the SPI pins instead of GPIOs and so on.

Pinctrl currently has no real way of reading out the state from the
hardware and presenting it as a selected group+function combination,
it only knows what has been selected intrinsically with the system,
so some enhancements may be needed to make pinctrl reflect
the state when booting.

Yours,
Linus Walleij
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