mmc: core: put eMMC in sleep (cmd5) mode before suspend

Put MMC to sleep if it supports SLEEP/AWAKE (CMD5) in the mmc suspend to minimize power consumption. Signed-off-by: Balaji T K <[email protected]> Acked-by: Venkatraman S <[email protected]> Signed-off-by: Chris Ball <[email protected]> Signed-off-by: Subhash Jadavani <[email protected]> (cherry picked from commit 3765839) Change-Id: I0c0d5d06c4204b15471d1ca95aec0c7fcaaae816 Signed-off-by: Shruthi Krishna <[email protected]>
cybik · Nov 5, 2011 · d4e3577 · d4e3577
1 parent a8d7439
commit d4e3577
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
@@ -589,16 +589,20 @@ static void mmc_detect(struct mmc_host *host)
  */
 static int mmc_suspend(struct mmc_host *host)
 {
+	int err = 0;
+
 	BUG_ON(!host);
 	BUG_ON(!host->card);
 
 	mmc_claim_host(host);
-	if (!mmc_host_is_spi(host))
+	if (mmc_card_can_sleep(host))
+		err = mmc_card_sleep(host);
+	else if (!mmc_host_is_spi(host))
 		mmc_deselect_cards(host);
 	host->card->state &= ~MMC_STATE_HIGHSPEED;
 	mmc_release_host(host);
 
-	return 0;
+	return err;
 }
 
 /*