[PATCH v7 0/3] mmc: dw_mmc: fixes for suspend/resume on exynos

[Doug Anderson]

This series of patches addresses some suspend/resume problems with
dw_mmc on exynos platforms, espeically exynos5420.  This patchset was
tested on the current ToT Chromeos 3.8 tree (which has lots of
backports from 3.10/3.11) and on ToT Linux (v3.11-rc6).  I have
confirmed basic booting and that SD cards work across suspend/resume
(both if they are plugged in and if they are not plugged in).

I have received confirmation from Samsung that the problem solved for
exynos5420 is a silicon errata and that this is a good fix.

Changes in v7:
- Avoid printing the same clock over and over again w/ MMC_CLKGATE.

Changes in v6:
- Took out TODO comment copied from main platform code.
- Replaces previous pathes that ensured saving/restoring clocks.

Changes in v5:
- Cleaned up dw_mci_exynos_resume_noirq() comment as per Seungwon.
- Don't memcpy dev_pm_ops structure, define a new one.

Changes in v4:
- Take Seungwon's suggestion and don't add any dw_mmc-pltfm code.

Changes in v3:
- Add freeze/thaw and poweroff/restore noirq entries.

Changes in v2:
- Use suspend_noirq as per James Hogan.

Doug Anderson (3):
  mmc: dw_mmc: Add exynos resume_noirq callback to clear WAKEUP_INT
  mmc: dw_mmc: Honor requests to set the clock to 0 (turn off clock)
  mmc: dw_mmc: Set timeout to max upon resume

 drivers/mmc/host/dw_mmc-exynos.c | 53 +++++++++++++++++++++++++++++++++++++++-
 drivers/mmc/host/dw_mmc.c        | 39 ++++++++++++++++++-----------
 2 files changed, 77 insertions(+), 15 deletions(-)

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1.8.4