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-popov@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