linux-kernel - Re: [PATCH 10/10] ARM: dts: Fix dm814x pinctrl address and mask

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Date:	Wed, 2 Dec 2015 02:14:11 +0100
From:	Matthijs van Duin <matthijsvanduin@...il.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Brian Hutchinson <b.hutchman@...il.com>,
	Delio Brignoli <dbrignoli@...ioscience.com>,
	Neil Armstrong <narmstrong@...libre.com>,
	Philipp Rosenberger <ilu@...utronix.de>
Subject: Re: [PATCH 10/10] ARM: dts: Fix dm814x pinctrl address and mask

On 2 December 2015 at 01:46, Tony Lindgren <tony@...mide.com> wrote:
> Ouch. We should probably have separate PIN_INPUT_3V3 and PIN_OUTPUT_3V3
> dts macros that ensure that?

Can't we just keep bit 18 out of the function mask? The bootloader
should already have made sure all pins have bit 18 set (and bit 19 set
to correct values after ROM mucked them up, see advisory 2.1.88), so
all that needs to be done is avoid touching them.

Are the power savings from disabling unnecessary inputs significant
enough to spend any headache on it?

Matthijs
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