diff options
| author | Pavan Kunapuli <pkunapuli@nvidia.com> | 2012-07-10 18:57:25 +0530 |
|---|---|---|
| committer | Rohan Somvanshi <rsomvanshi@nvidia.com> | 2012-07-31 03:35:29 -0700 |
| commit | ee2367b525e8c1c5036d170bcba1798abd0ca9c7 (patch) | |
| tree | b685899e46f9f719c8005d1bd03850db03bc1e6e /drivers/mmc | |
| parent | 830b927faaf4236217f42c9e1f22d9147869c30b (diff) | |
mmc: sdhci: Avoid power on/off during sleep
If eMMC sleep support is enabled, set MMC_PM_KEEP_POWER
to avoid host power off and power on. Instead, restore
the host context in resume.
Bug 1007644
Bug 936069
Change-Id: I74578bb1f9e297b3af6bd79b9215364334984836
Signed-off-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Reviewed-on: http://git-master/r/118913
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Min-wuk Lee <mlee@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 6c86278b22ab..f86bf746a6e6 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2349,6 +2349,15 @@ int sdhci_suspend_host(struct sdhci_host *host, pm_message_t state) } if (mmc->card) { + /* + * If eMMC cards are put in sleep state, Vccq can be disabled + * but Vcc would still be powered on. In resume, we only restore + * the controller context. So, set MMC_PM_KEEP_POWER flag. + */ + if (mmc_card_can_sleep(mmc) && + !(mmc->caps & MMC_CAP2_NO_SLEEP_CMD)) + mmc->pm_flags = MMC_PM_KEEP_POWER; + ret = mmc_suspend_host(host->mmc); if (ret) { if (has_tuning_timer) { |