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Date: Wed, 4 Feb 2015 17:37:56 +0200 From: Mika Westerberg <mika.westerberg@...ux.intel.com> To: Linus Walleij <linus.walleij@...aro.org> Cc: Jerome Blin <jerome.blin@...el.com>, Heikki Krogerus <heikki.krogerus@...ux.intel.com>, "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] pinctrl: cherryview: Configure HiZ pins to be input when requested as GPIOs On Wed, Feb 04, 2015 at 10:01:49AM +0100, Linus Walleij wrote: > On Thu, Jan 29, 2015 at 11:44 AM, Mika Westerberg > <mika.westerberg@...ux.intel.com> wrote: > > > If the pin is in HiZ mode when it is requested as GPIO its value cannot be > > read (it always returns 0). In order to cope with the Linux GPIO subsystem > > where we do not have such state at all, turn the pin to be input instead. > > > > Reported-by: Jerome Blin <jerome.blin@...el.com> > > Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com> > > Patch applied. Thanks. > Since putting a pin into GPIO mode start poking around in essentially pin > control registers, we may need to revisit the issue of the pin control subsystem > not denying simultaneous use of a pin for a device muxing and GPIO. > Maybe the "strict" setting forcing a pin to be either one or the other on > a per-driver basis would enforce a better policy on this driver (and some > others). Yes, something like that sounds reasonable. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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