On Thu, Sep 23, 2010 at 7:52 AM, Luciano Coelho <luciano.coelho@xxxxxxxxx> wrote: > On Thu, 2010-09-23 at 14:03 +0200, ext Robert Nelson wrote: >> On Thu, Sep 23, 2010 at 5:30 AM, Grazvydas Ignotas <notasas@xxxxxxxxx> wrote: >> > On Thu, Sep 23, 2010 at 11:20 AM, Luciano Coelho >> > <luciano.coelho@xxxxxxxxx> wrote: >> >> Add board configuration for the wl1271 daughter board. This patch is based >> >> on Ohad Ben-Cohen's patches for Zoom boards. >> > >> > Hm can that daughter board be detected? With your patch all beagle >> > users will get GPIO139 toggled, and if someone has that wired to >> > chainsaw switch somebody might get hurt. >> >> Expansion boards really need to follow: >> >> http://elinux.org/BeagleBoardPinMux#Expansion_boards >> >> Is there any eeprom on i2c bus #2 for identification on this board? > > Hmmm... <checking the schematics> > > Yes, it does. :) This makes perfect sense. > > My bootloader (U-Boot 2010.03) doesn't seem to detect it, though: > > <clip> > Probing for expansion boards, if none are connected you'll see a > harmless I2C error. > > No EEPROM on expansion board > <clip> I'd first add the board to the list on the wiki to protect the expansion board id. Here's the current patch for u-boot for these expansion boards, it only implements id's for the boards listed at the time. http://www.sakoman.com/cgi-bin/gitweb.cgi?p=u-boot.git;a=commit;h=95993d1fee62ef64b2f58c1e186176ca9033c35e > Do I need a special bootloader? > > Is there any standard way to recognize the expansion board and configure > it properly? Yeap, you need a special bootloader, which is a downside to the current implementation... It relies on u-boot to do the i2c probing and detect which expansion board is connected, it would be nice if the kernel could do it on it's own.. So currently u-boot probes, then notifies the kernel thru a "buddy" variable that gets passed with the bootargs.. board-omap3beagle.c then parse's the "buddy" variable to setup the expansion device, like as shown for the zippy1/2 expansion boards: http://cgit.openembedded.org/cgit.cgi/openembedded/tree/recipes/linux/linux-omap-psp-2.6.32/0007-ARM-OMAP-beagleboard-Add-infrastructure-to-do-fixups.patch (note there are patches applied before this and after, so it's won't apply cleanly to mainline) Regards, -- Robert Nelson http://www.rcn-ee.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
