linux-kernel - Re: [PATCH v10] gpio: Add GPIO support for the ACCES 104-IDIO-16

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Date:	Tue, 27 Oct 2015 12:13:03 +0100
From:	Simon Guinot <simon.guinot@...uanux.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	William Breathitt Gray <vilhelm.gray@...il.com>,
	Andreas Bofjall <andreas@...onk.org>,
	Diego Elio Pettenò <flameeyes@...meeyes.eu>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Daniel Krueger <daniel.krueger@...tec-electronic.com>,
	Bruno Randolf <br1@...fach.org>,
	Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
	Alexandre Courbot <gnurou@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v10] gpio: Add GPIO support for the ACCES 104-IDIO-16

On Tue, Oct 27, 2015 at 11:06:58AM +0100, Linus Walleij wrote:
> On Mon, Oct 19, 2015 at 6:59 PM, William Breathitt Gray
> <vilhelm.gray@...il.com> wrote:
> 
> > The ACCES 104-IDIO-16 family of PC/104 utility boards feature 16
> > optically isolated inputs and 16 optically isolated FET solid state
> > outputs. This driver provides GPIO support for these 32 channels of
> > digital I/O. Change-of-State detection interrupts are not supported.
> >
> > GPIO 0-15 correspond to digital outputs 0-15, while GPIO 16-31
> > correspond to digital inputs 0-15. The base port address for the device
> > may be set via the idio_16_base module parameter.
> >
> > Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
> > ---
> > Changes in v10:
> >   - Rename symbols to be more concise
> >   - Allocate GPIO device private data structure in probe function
> 
> Yes, exactly like this. :)
> 
> Patcha applied for kernel v4.4.
> 
> > +menu "ISA GPIO drivers"
> > +
> > +config GPIO_104_IDIO_16
> > +       tristate "ACCES 104-IDIO-16 GPIO support"
> > +       depends on X86
> > +       help
> > +         Enables GPIO support for the ACCES 104-IDIO-16 family.
> > +
> > +endmenu
> 
> I have five other drivers using port-based I/O:
> 
> gpio-f7188x.c
> gpio-it87.c
> gpio-sch.c
> gpio-sch311x.c
> gpio-ts5500.c
> 
> Do you think it makes sense to move all of these in under
> the "ISA GPIO drivers" menu as well? I guess they all require
> ISA after all.
> 
> (Added their maintainers to the To: line so I can get some input
> on this.)

Hi Linus,

The Super-I/Os are connected to a LPC bridge. And since LPC is much like
ISA for software, then I guess it makes sense to move the drivers
gpio-f7188x and gpio-it87 under a "ISA GPIO drivers" menu.

Simon

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