mmc: core: disable runtime-pm if MMC_CAP2_CORE_RUNTIME_PM is not defined
There is currently no mechanism to disable the runtime-pm
of eMMC/SD card. This patch adds the mechanism to disable
runtime-pm of eMMC/SD if MMC_CAP2_CORE_RUNTIME_PM is not
defined.
It sets the platform, class and card device as RPM_ACTIVE
irrespective of the capability but doesn't enable it.
The card is never runtime-suspended and hence the
corresponding mmc_host and platform device are not
runtime-suspended as well.
A capability MMC_CAP2_CORE_PM is used to select the use
of core power-management framework.
CRs-Fixed: 490021
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Change-Id: I394a81a889ab7d4f0f0e6fe4b932630e30fc16c9
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index e1dbd21..bff056d 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -300,6 +300,7 @@
#define MMC_CAP2_HS400_1_8V (1 << 21) /* can support */
#define MMC_CAP2_HS400_1_2V (1 << 22) /* can support */
+#define MMC_CAP2_CORE_PM (1 << 23) /* use PM framework */
#define MMC_CAP2_HS400 (MMC_CAP2_HS400_1_8V | \
MMC_CAP2_HS400_1_2V)
mmc_pm_flag_t pm_caps; /* supported pm features */
@@ -572,4 +573,9 @@
return host->caps2 & MMC_CAP2_CORE_RUNTIME_PM;
}
+static inline int mmc_use_core_pm(struct mmc_host *host)
+{
+ return host->caps2 & MMC_CAP2_CORE_PM;
+}
+
#endif /* LINUX_MMC_HOST_H */