On Mon, Jul 30, 2012 at 06:36:24AM -0700, Steve Sakoman wrote:
Does anyone have any experience enabling the second or third mmc channels in u-boot on an omap3 board?
I used the feature successfully a couple of years ago on Overo, but of course there have been many changes in the mmc code since then.
Here's what I tried for overo with the current head of tree:
diff --git a/board/overo/overo.c b/board/overo/overo.c index f973870..51315b3 100644 --- a/board/overo/overo.c +++ b/board/overo/overo.c @@ -404,6 +404,7 @@ int board_eth_init(bd_t *bis) int board_mmc_init(bd_t *bis) { omap_mmc_init(0, 0, 0);
- omap_mmc_init(2, 0, 0); return 0;
} #endif
The result is a hang after printing: MMC: OMAP SD/MMC 0, SD/MMC 1
After adding a few printf's, it seems that the crash/hang is occurring when calling env_relocate_spec in env_nand.c, which of course is completely unrelated code!
I've spent some time scratching my head against a hang in the same spot, on am335x. I only have seen it when booting from NAND (same image from MMC or UART is fine). Further, it only showed up when a change was made in another driver which isn't even entered before the hang.