linux-kernel - Re: [PATCH v3 1/1] pinctrl: add Intel BayTrail GPIO/pinctrl support

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Message-ID: <535A899E.5020801@codeaurora.org>
Date:	Fri, 25 Apr 2014 11:13:18 -0500
From:	Timur Tabi <timur@...eaurora.org>
To:	"Westerberg, Mika" <mika.westerberg@...el.com>
CC:	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	Linus <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	lkml <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH v3 1/1] pinctrl: add Intel BayTrail GPIO/pinctrl support

Westerberg, Mika wrote:
> If you happen to have pin controller/mux driver that drives that hardware,
> I'm sure your pinmux functions gets called.

Actually, I don't think they do.  On a device-tree system, the functions 
get called automatically by the pinctrl layer when it parses the device 
tree.  This happens in response to probe, remove, and various power 
management changes.

AFAIK, there is nothing at all like that for ACPI systems.  Do you have 
an example of a driver making pinmux calls directly?

-- 
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