mmc: sdhci: add ability to stay runtime-resumed if the card is powered up
If card power is dependent on SD bus power then the host controller
must not be runtime suspended while the card is powered up. Add
the ability to stay runtime-resumed in that case and enable it with a new
quirk SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index b838ffc..ba35bdb 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -95,6 +95,7 @@
/* The system physically doesn't support 1.8v, even if the host does */
#define SDHCI_QUIRK2_NO_1_8_V (1<<2)
#define SDHCI_QUIRK2_PRESET_VALUE_BROKEN (1<<3)
+#define SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON (1<<4)
int irq; /* Device IRQ */
void __iomem *ioaddr; /* Mapped address */
@@ -139,6 +140,7 @@
u8 pwr; /* Current voltage */
bool runtime_suspended; /* Host is runtime suspended */
+ bool bus_on; /* Bus power prevents runtime suspend */
struct mmc_request *mrq; /* Current request */
struct mmc_command *cmd; /* Current command */