Hi Tom, > On Fri, Nov 14, 2014 at 03:20:44PM +0200, Lubomir Popov wrote: > >> On the J6Eco EVM we have two on-board devices on the I2C5 bus; this >> bus is also routed to the camera and expansion connectors. I2C4 is >> routed to one of the expansion connectors. This patch enables usage >> of these two buses. >> >> For I2C5 to work, the 'ARM: OMAP5: DRA7xx: Enable I2C5 operation' >> patch is required as a prerequisite. >> >> Tested on a J6 ECO EVM rev.B with a DRA726 ES1.0. >> >> Signed-off-by: Lubomir Popov <l-po...@ti.com> > > OK, but what's the usecase for enabling these in U-Boot? Are we using > things on these buses?
Both I2C4 and I2C5 are routed to expansion connectors on the J6Eco board. If a customer has some add-on hardware with I2C devices attached through these connectors, it seems useful to have the buses functional for bring- up/debug. Moreover, the board itself has two devices on I2C5, one of them being a GPIO expander driving some system configuration signals (e.g. for override of the boot settings), and being able to control it could be useful as well. Best regards, Lubo _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
