[RFC] ARM: OMAP: hwmod: wait for sysreset complete after enabling hwmod

Shubhrajyoti Datta [off-list ref] writes:

On Tue, Oct 23, 2012 at 3:16 AM, Kevin Hilman
[off-list ref] wrote:

quoted

Tero Kristo [off-list ref] writes:

quoted

When waking up from off-mode, some IP blocks are reset automatically by
hardware. For this reason, software must wait until the reset has
completed before attempting to access the IP block.

This patch fixes for example the bug introduced by commit
6c31b2150ff96755d24e0ab6d6fea08a7bf5c44c ("mmc: omap_hsmmc: remove access
to SYSCONFIG register"), in which the MMC IP block is reset during
off-mode entry, but the code expects the module to be already available
during the execution of context restore.

Signed-off-by: Tero Kristo <redacted>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <redacted>
Cc: Venkatraman S <redacted>

I can confirm that this patch the regression in my OMAP3 PM tests where
suspend test (to retention or off) failed if ran after the off-idle
test.

Tested-by: Kevin Hilman <redacted>

on 3530/Overo, 3730/OveroSTORM, 3730/Beagle-xM

on 3630/Beagle works.
However on 3430 on idle path didnot work.
let me know if i am missing some thing.

Could you please explain what worked and didn't work on each platforms?

Also, which 3430 did you test on?  If it's SDP, then it has a UART1
console, correct?

Kevin