[PATCH v2 0/5] mmc: sdhci-esdhc-imx: add runtime pm support

[Dong Aisheng]

We disable root clock in runtime pm to save power.

Patch 2~4 are some fixes needed for enable runtime pm or it may
break the UHS cards(SD3.0/eMMC4.5).

Below are some tests result i ran which passed mmc_test tool after enable rpm:
SDHC UHS1 on imx6q sabreauto
eMMC 4.5 on imx6sl evk
SDXC UHS1 on imx6sl evk
eMMC DDR on imx6q sabresd
SDHC on imx6q sabresd

ChangeLog:
v1->v2: only patch 5 changed. Add pm_runtime_set_active
	based on Ulf's comments.

Dong Aisheng (5):
  mmc: sdhci-pltfm: export pltfm suspend/resume api
  mmc: sdhci-esdhc-imx: tuning bits should not be cleared during reset
  mmc: sdhci-esdhc-imx: clear SDHCI_CTRL_EXEC_TUNING should not affect
    other bits
  mmc: sdhci-esdhc-imx: fix runtime pm unblance issue
  mmc: sdhci-esdhc-imx: add runtime pm support

 drivers/mmc/host/sdhci-esdhc-imx.c |   81 ++++++++++++++++++++++++++++++------
 drivers/mmc/host/sdhci-pltfm.c     |    6 ++-
 drivers/mmc/host/sdhci-pltfm.h     |    2 +
 3 files changed, 74 insertions(+), 15 deletions(-)

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1.7.2.rc3