mmc: add mmc card sleep and awake support

Add support for the new MMC command SLEEP_AWAKE.

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index be1fc013fbe..828e60ea528 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1185,6 +1185,46 @@ void mmc_power_restore_host(struct mmc_host *host)
 }
 EXPORT_SYMBOL(mmc_power_restore_host);
 
+int mmc_card_awake(struct mmc_host *host)
+{
+        int err = -ENOSYS;
+
+        mmc_bus_get(host);
+
+        if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
+                err = host->bus_ops->awake(host);
+
+        mmc_bus_put(host);
+
+        return err;
+}
+EXPORT_SYMBOL(mmc_card_awake);
+
+int mmc_card_sleep(struct mmc_host *host)
+{
+        int err = -ENOSYS;
+
+        mmc_bus_get(host);
+
+        if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
+                err = host->bus_ops->sleep(host);
+
+        mmc_bus_put(host);
+
+        return err;
+}
+EXPORT_SYMBOL(mmc_card_sleep);
+
+int mmc_card_can_sleep(struct mmc_host *host)
+{
+        struct mmc_card *card = host->card;
+
+        if (card && mmc_card_mmc(card) && card->ext_csd.rev >= 3)
+                return 1;
+        return 0;
+}
+EXPORT_SYMBOL(mmc_card_can_sleep);
+
 #ifdef CONFIG_PM
 
 /**