On Mon, 14 Jan 2008, Jean Delvare wrote: > On Mon, 14 Jan 2008 11:57:52 +0100 (CET), Geert Uytterhoeven wrote: > > On Sun, 13 Jan 2008, Jon Smirl wrote: > > > 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. > > I thought that the module aliases were generated by > scripts/mod/modpost? As a matter of fact, I did not apply Jon's patch
Sorry, you're right. Too early in the morning :-) > to module-init-tools, and "modinfo" shows me module aliases properly > for i2c drivers that call MODULE_DEVICE_TABLE(): I've just looked it up again (I had to do a similar thing for Zorro bus support). Module-init-tools (depmod) also creates the modules.*map files, which are used to map from device IDs to module names. I think these are used by udev to load the appropriate module when a device with a specific device ID pops up in sysfs. > $ /sbin/modinfo lm90 > filename: /lib/modules/2.6.24-rc7-git4/kernel/drivers/hwmon/lm90.ko > author: Jean Delvare <[EMAIL PROTECTED]> > description: LM90/ADM1032 driver > license: GPL > vermagic: 2.6.24-rc7-git4 mod_unload > depends: hwmon > alias: i2c:Nlm90* > alias: i2c:Nadm1032* > alias: i2c:Nlm99* > alias: i2c:Nlm86* > alias: i2c:Nmax6657* > alias: i2c:Nadt7461* > alias: i2c:Nmax6680* > $ > > "modprobe i2c:Nadm1032" loads the lm90 driver as expected. Yes, it's also still not 100% clear to me when `i2c:Nadm1032' is used, and when modules.i2cmap would be used... With kind regards, Geert Uytterhoeven Software Architect Sony Network and Software Technology Center Europe The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium Phone: +32 (0)2 700 8453 Fax: +32 (0)2 700 8622 E-mail: [EMAIL PROTECTED] 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 · B-1840 Londerzeel · Belgium VAT BE 0413.825.160 · RPR Brussels Fortis Bank Zaventem · Swift GEBABEBB08A · IBAN BE39001382358619