[U-Boot] [PATCH] ARM: OMAP5: DRA7xx: Enable I2C4 and I2C5 usage on the J6Eco EVM

[Lubomir Popov]

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 at 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