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-rw-r--r--drivers/mmc/core/sdio.c37
-rw-r--r--drivers/mmc/core/sdio_bus.c33
-rw-r--r--include/linux/mmc/host.h1
3 files changed, 46 insertions, 25 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 42a949b..efef5f9 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -547,9 +547,11 @@ static void mmc_sdio_detect(struct mmc_host *host)
BUG_ON(!host->card);
/* Make sure card is powered before detecting it */
- err = pm_runtime_get_sync(&host->card->dev);
- if (err < 0)
- goto out;
+ if (host->caps & MMC_CAP_POWER_OFF_CARD) {
+ err = pm_runtime_get_sync(&host->card->dev);
+ if (err < 0)
+ goto out;
+ }
mmc_claim_host(host);
@@ -571,7 +573,8 @@ static void mmc_sdio_detect(struct mmc_host *host)
* is about to show up at this point, the _sync variant is
* desirable anyway.
*/
- pm_runtime_put_sync(&host->card->dev);
+ if (host->caps & MMC_CAP_POWER_OFF_CARD)
+ pm_runtime_put_sync(&host->card->dev);
out:
if (err) {
@@ -728,16 +731,21 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
card = host->card;
/*
- * Let runtime PM core know our card is active
+ * Enable runtime PM only if supported by host+card+board
*/
- err = pm_runtime_set_active(&card->dev);
- if (err)
- goto remove;
+ if (host->caps & MMC_CAP_POWER_OFF_CARD) {
+ /*
+ * Let runtime PM core know our card is active
+ */
+ err = pm_runtime_set_active(&card->dev);
+ if (err)
+ goto remove;
- /*
- * Enable runtime PM for this card
- */
- pm_runtime_enable(&card->dev);
+ /*
+ * Enable runtime PM for this card
+ */
+ pm_runtime_enable(&card->dev);
+ }
/*
* The number of functions on the card is encoded inside
@@ -755,9 +763,10 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
goto remove;
/*
- * Enable Runtime PM for this func
+ * Enable Runtime PM for this func (if supported)
*/
- pm_runtime_enable(&card->sdio_func[i]->dev);
+ if (host->caps & MMC_CAP_POWER_OFF_CARD)
+ pm_runtime_enable(&card->sdio_func[i]->dev);
}
mmc_release_host(host);
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 2716c7a..203da44 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -17,6 +17,7 @@
#include <linux/pm_runtime.h>
#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
#include <linux/mmc/sdio_func.h>
#include "sdio_cis.h"
@@ -132,9 +133,11 @@ static int sdio_bus_probe(struct device *dev)
* it should call pm_runtime_put_noidle() in its probe routine and
* pm_runtime_get_noresume() in its remove routine.
*/
- ret = pm_runtime_get_sync(dev);
- if (ret < 0)
- goto out;
+ if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) {
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ goto out;
+ }
/* Set the default block size so the driver is sure it's something
* sensible. */
@@ -151,7 +154,8 @@ static int sdio_bus_probe(struct device *dev)
return 0;
disable_runtimepm:
- pm_runtime_put_noidle(dev);
+ if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+ pm_runtime_put_noidle(dev);
out:
return ret;
}
@@ -160,12 +164,14 @@ static int sdio_bus_remove(struct device *dev)
{
struct sdio_driver *drv = to_sdio_driver(dev->driver);
struct sdio_func *func = dev_to_sdio_func(dev);
- int ret;
+ int ret = 0;
/* Make sure card is powered before invoking ->remove() */
- ret = pm_runtime_get_sync(dev);
- if (ret < 0)
- goto out;
+ if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) {
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ goto out;
+ }
drv->remove(func);
@@ -178,10 +184,12 @@ static int sdio_bus_remove(struct device *dev)
}
/* First, undo the increment made directly above */
- pm_runtime_put_noidle(dev);
+ if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+ pm_runtime_put_noidle(dev);
/* Then undo the runtime PM settings in sdio_bus_probe() */
- pm_runtime_put_noidle(dev);
+ if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+ pm_runtime_put_noidle(dev);
out:
return ret;
@@ -191,6 +199,8 @@ out:
static int sdio_bus_pm_prepare(struct device *dev)
{
+ struct sdio_func *func = dev_to_sdio_func(dev);
+
/*
* Resume an SDIO device which was suspended at run time at this
* point, in order to allow standard SDIO suspend/resume paths
@@ -212,7 +222,8 @@ static int sdio_bus_pm_prepare(struct device *dev)
* since there is little point in failing system suspend if a
* device can't be resumed.
*/
- pm_runtime_resume(dev);
+ if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+ pm_runtime_resume(dev);
return 0;
}
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 6d87f68..30f6fad 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -168,6 +168,7 @@ struct mmc_host {
/* DDR mode at 1.8V */
#define MMC_CAP_1_2V_DDR (1 << 12) /* can support */
/* DDR mode at 1.2V */
+#define MMC_CAP_POWER_OFF_CARD (1 << 13) /* Can power off after boot */
mmc_pm_flag_t pm_caps; /* supported pm features */
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