On 05/09/2012 12:44 AM, Thomas Weber wrote:
Hello Tom & Peter,
On 05/08/12 19:29, Tom Rini wrote:
As originally reported against beagleboard we currently have the
following error message reported in SPL:
U-Boot SPL 2012.04-00020-gb8310b9-dirty (Apr 25 2012 - 18:49:57)
Texas Instruments Revision detection unimplemented
OMAP SD/MMC: 0
timed out in wait_for_bb: I2C_STAT=1000
reading u-boot.img
....
The reason for above message is that when booting from MMC, I2C needs to
be initialized to talk with the TWL4030. On OMAP3 I2C is only
initalized in SPL if CONFIG_SPL_BOARD_INIT is set.
On Tricorder there is no such message. I thought the I2C to TWL4030 is
initialized by the ROM code.
And why can the SPL read the u-boot.img in the next step?
I think we need this still, on correctness grounds. We include the i2c
code (and twl4030 code) to have the MMC driver link and behave as in
full U-Boot. I don't see this timed out message on my am3517 evm nor my
"omap3evm" with an am37x SOM (iirc anyhow). I do see it on cold power
on, on my beagle however, but not warm (which might be why I missed this
before).
--
Tom
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