From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ro-out-1112.google.com (ro-out-1112.google.com [72.14.202.176]) by ozlabs.org (Postfix) with ESMTP id 0EE64DDE1D for ; Tue, 15 Jan 2008 01:25:57 +1100 (EST) Received: by ro-out-1112.google.com with SMTP id p7so2575759roc.1 for ; Mon, 14 Jan 2008 06:25:55 -0800 (PST) Message-ID: <9e4733910801140625u2503b508kc99e93ff59e31157@mail.gmail.com> Date: Mon, 14 Jan 2008 09:25:54 -0500 From: "Jon Smirl" To: "Geert Uytterhoeven" Subject: Re: [i2c] [PATCH] update module-init-tools to support the i2c subsystem In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 References: <9e4733910712171839h214e0bc3q179266c86e5987b1@mail.gmail.com> <20080113152735.5dca46a1@hyperion.delvare> <9e4733910801130714m1be16826jf240171972324d16@mail.gmail.com> <20080113163543.16e3d26b@hyperion.delvare> <9e4733910801130826l799e4897pe7380ccb973b5fd0@mail.gmail.com> <20080113184337.5d4cd546@hyperion.delvare> <9e4733910801131004i669276e2pde04b195dd10bd90@mail.gmail.com> Cc: Jean Delvare , linuxppc-dev@ozlabs.org, i2c@lm-sensors.org, linux-kernel@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 1/14/08, Geert Uytterhoeven wrote: > On Sun, 13 Jan 2008, Jon Smirl wrote: > > On 1/13/08, Jean Delvare wrote: > > > On Sun, 13 Jan 2008 11:26:07 -0500, Jon Smirl wrote: > > > > On 1/13/08, Jean Delvare wrote: > > > > > On Sun, 13 Jan 2008 10:14:14 -0500, Jon Smirl wrote: > > > > > > On 1/13/08, Jean Delvare wrote: > > > > > > > On Mon, 17 Dec 2007 21:39:37 -0500, Jon Smirl wrote: > > > > > > > > Follow on to: "Series to add device tree naming to i2c" > > > > > > > > Teach module-init-tools about the i2c subsystem. > > > > > > > > > > > > > > Can you please explain what this patch does and why it is nee= ded? > > > > > > > > > > > > It generates the entries needed for the user space module tools= to > > > > > > work with the aliases. For example modprobe/depmod. It is a sta= ndard > > > > > > part of the kernel module system. > > > > > > > > > > What entries, where? What can you do after applying your patch th= at you > > > > > couldn't do before? > > > > > > > > The drivers you are testing with don't depend on other drivers. > > > > > > They do. I'm testing with the lm90 driver, which depends on the hwmon > > > driver. Both load automatically when the underlying i2c-parport drive= r > > > instantiate an "adm1032" i2c device. > > > > I don't know exactly what those modules tables are used for. I just > > copied what the other subsystems do. Maybe they are used when you make > > an initrd to know which drivers to copy into the image. > > Module-init-tools needs those table to create module aliases in the *.ko > files from the MODULE_DEVICE_TABLE(), so udev can load the modules based > on the device IDs when the devices appear in sysfs. > > That's the generic part. How this applies to i2c devices on platforms > without Open Firmware device trees is another question. I guess that's > where Jean gets confused (i2c_device_id got _removed_ last year, > because it didn't make sense (at the time?)). Last year i2c modules weren't dynamically loadable so it wasn't needed. > > With kind regards, > > Geert Uytterhoeven > Software Architect > > Sony Network and Software Technology Center Europe > The Corporate Village =B7 Da Vincilaan 7-D1 =B7 B-1935 Zaventem =B7 Belgi= um > > Phone: +32 (0)2 700 8453 > Fax: +32 (0)2 700 8622 > E-mail: Geert.Uytterhoeven@sonycom.com > Internet: http://www.sony-europe.com/ > > Sony Network and Software Technology Center Europe > A division of Sony Service Centre (Europe) N.V. > Registered office: Technologielaan 7 =B7 B-1840 Londerzeel =B7 Belgium > VAT BE 0413.825.160 =B7 RPR Brussels > Fortis Bank Zaventem =B7 Swift GEBABEBB08A =B7 IBAN BE39001382358619 --=20 Jon Smirl jonsmirl@gmail.com