@@ -1491,10 +1491,22 @@ static int mmci_save(struct amba_device *dev)
{
struct mmc_host *mmc = amba_get_drvdata(dev);
unsigned long flags;
+ struct mmc_ios ios;
+ int ret = 0;
if (mmc) {
struct mmci_host *host = mmc_priv(mmc);
+ /* Let the ios_handler act on a POWER_OFF to save power. */
+ if (host->plat->ios_handler) {
+ memcpy(&ios, &mmc->ios, sizeof(struct mmc_ios));
+ ios.power_mode = MMC_POWER_OFF;
+ ret = host->plat->ios_handler(mmc_dev(mmc),
+ &ios);
+ if (ret)
+ return ret;
+ }
+
spin_lock_irqsave(&host->lock, flags);
/*
@@ -1513,7 +1525,7 @@ static int mmci_save(struct amba_device *dev)
amba_vcore_disable(dev);
}
- return 0;
+ return ret;
}
static int mmci_restore(struct amba_device *dev)
@@ -1536,6 +1548,11 @@ static int mmci_restore(struct amba_device *dev)
writel(MCI_IRQENABLE, host->base + MMCIMASK0);
spin_unlock_irqrestore(&host->lock, flags);
+
+ /* Restore settings done by the ios_handler. */
+ if (host->plat->ios_handler)
+ host->plat->ios_handler(mmc_dev(mmc),
+ &mmc->ios);
}
return 0;
To disable a levelshifter when we are in an idle state will decrease current consumption. We make use of the ios_handler at runtime suspend and at regular suspend to accomplish this. Of course depending on the used levelshifter the decrease of current differs. For ST6G3244ME the value is up to ~200 uA. Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com> --- drivers/mmc/host/mmci.c | 19 ++++++++++++++++++- 1 files changed, 18 insertions(+), 1 deletions(-)