linux-kernel - Re: [PATCH 3/3] i2c: Make I2C ID tables non-mandatory for DT'ed and/or ACPI'ed devices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140603081136.GE3060@lee--X1>
Date:	Tue, 3 Jun 2014 09:11:36 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	wsa@...-dreams.de, linus.walleij@...aro.org,
	grant.likely@...aro.org, linux-i2c@...r.kernel.org
Subject: Re: [PATCH 3/3] i2c: Make I2C ID tables non-mandatory for DT'ed
 and/or ACPI'ed devices

On Mon, 02 Jun 2014, One Thousand Gnomes wrote:

> On Mon,  2 Jun 2014 14:41:03 +0100
> Lee Jones <lee.jones@...aro.org> wrote:
> 
> > Currently the I2C framework insists on devices supplying an I2C ID
> > table.  Many of the devices which do so unnecessarily adding quite a
> > few wasted lines to kernel code.  This patch allows drivers a means
> > to 'not' supply the aforementioned table and match on either DT
> > and/or ACPI match tables instead.
> > 
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> > ---
> >  drivers/i2c/i2c-core.c | 13 ++++++++++++-
> >  1 file changed, 12 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> > index d0c7180..811b78f 100644
> > --- a/drivers/i2c/i2c-core.c
> > +++ b/drivers/i2c/i2c-core.c
> > @@ -271,7 +271,18 @@ static int i2c_device_probe(struct device *dev)
> >  		return 0;
> >  
> >  	driver = to_i2c_driver(dev->driver);
> > -	if (!driver->probe || !driver->id_table)
> > +	if (!driver->probe)
> > +		return -EINVAL;
> > +
> > +	/*
> > +	 * An I2C ID table is not madatory, if and only if, a suitable Device
> 
> typo "madatory"..
> 
> > +	 * Tree and/or ACPI match table entry is supplied for the probing
> > +	 * device.
> > +	 *
> > +	 * TODO: Provide 'device type' to 'ACPI node' call and match here.
> > +	 */
> > +	if (!driver->id_table &&
> > +	    !of_match_device(dev->driver->of_match_table, dev))
> >  		return -ENODEV;
> >  
> 
> Looks sensible to me other than that.

Can I add your Ack once the typo is fixed?

> >  	if (!device_can_wakeup(&client->dev))

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
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/