linux-kernel - Re: [PATCH] gpio: add support for ITE IT87xx Super I/O GPIO.

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Message-ID: <1332175414.32717.154.camel@groeck-laptop>
Date:	Mon, 19 Mar 2012 09:43:34 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	Diego Elio Pettenò <flameeyes@...meeyes.eu>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Denis Turischev <denis@...pulab.co.il>
Subject: Re: [PATCH] gpio: add support for ITE IT87xx Super I/O GPIO.

On Mon, 2012-03-19 at 12:01 -0400, Diego Elio Pettenò wrote:
> Il giorno dom, 18/03/2012 alle 17.54 -0700, Guenter Roeck ha scritto:
> > On IT8721F (which is supposedly mostly compatible to IT8728F), only four of the 87 GPIO pins
> > are GPIO-only (unless I miscounted ;). All others have at least two different functions.
> 
> On the IT8728F the 64 GPIO (11 to 87, they use an X-Y notation) are
> divided in eight banks, and only the latest three banks are GPIO-only,
> the others all have alternate functions.

Hmm - at least the GPIO part seems to be quite different to IT8721F
after all. Too bad that ITE is so restrictive about their datasheets. I
hope the differences don't affect hwmon functionality - so far we assume
that it is compatible to IT8721F.

Guenter


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