linux-kernel - Re: [PATCH 00/27] Export I2C and OF module aliases in missing drivers

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Message-ID: <20150730163708.GB13165@dtor-ws>
Date:	Thu, 30 Jul 2015 09:37:08 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Javier Martinez Canillas <javier@....samsung.com>
Cc:	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	Mark Brown <broonie@...nel.org>, linux-iio@...r.kernel.org,
	linux-fbdev@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-leds@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	lm-sensors@...sensors.org, Sebastian Reichel <sre@...nel.org>,
	linux-input@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jean Delvare <jdelvare@...e.com>,
	Jonathan Cameron <jic23@...nel.org>,
	linux-media@...r.kernel.org, rtc-linux@...glegroups.com,
	linux-pm@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Wolfram Sang <wsa@...-dreams.de>,
	Takashi Iwai <tiwai@...e.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Lee Jones <lee.jones@...aro.org>,
	Bryan Wu <cooloney@...il.com>, linux-omap@...r.kernel.org,
	Sakari Ailus <sakari.ailus@....fi>, linux-usb@...r.kernel.org,
	linux-spi@...r.kernel.org, Tony Lindgren <tony@...mide.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 00/27] Export I2C and OF module aliases in missing drivers

On Thu, Jul 30, 2015 at 09:35:17AM -0700, Dmitry Torokhov wrote:
> Hi Javier,
> 
> On Thu, Jul 30, 2015 at 06:18:25PM +0200, Javier Martinez Canillas wrote:
> > Hello,
> > 
> > Short version:
> > 
> > This series add the missing MODULE_DEVICE_TABLE() for OF and I2C tables
> > to export that information so modules have the correct aliases built-in
> > and autoloading works correctly.
> > 
> > Longer version:
> > 
> > Currently it's mandatory for I2C drivers to have an I2C device ID table
> > regardless if the device was registered using platform data or OF. This
> > is because the I2C core needs an I2C device ID table for two reasons:
> > 
> > 1) Match the I2C client with a I2C device ID so a struct i2c_device_id
> >    is passed to the I2C driver probe() function.
> > 
> > 2) Export the module aliases from the I2C device ID table so userspace
> >    can auto-load the correct module. This is because i2c_device_uevent
> >    always reports a MODALIAS of the form i2c:<client->name>.
> 
> Why are we not fixing this? We emit specially carved uevent for
> ACPI-based devices, why not the same for OF? Platform bus does this...

Ah, now I see the 27/27 patch. I think it is exactly what we need. And
probably for SPI bus as well.

Thanks.

-- 
Dmitry
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