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authorUlf Hansson <ulf.hansson@linaro.org>2013-05-02 16:02:38 +0400
committerChris Ball <cjb@laptop.org>2013-05-26 22:23:16 +0400
commite94cfef698aae6b209d8918dd319312e4b02118d (patch)
treebbf4978bf665c480608317d0544967f6600b21a3 /include/linux/mmc
parent12d01d0b813b93e7bde1b5f468b5c85aa8b33590 (diff)
downloadlinux-e94cfef698aae6b209d8918dd319312e4b02118d.tar.xz
mmc: block: Enable runtime pm for mmc blkdevice
Once the mmc blkdevice is being probed, runtime pm will be enabled. By using runtime autosuspend, the power save operations can be done when request inactivity occurs for a certain time. Right now the selected timeout value is set to 3 s. Obviously this value will likely need to be configurable somehow since it needs to be trimmed depending on the power save algorithm. For SD-combo cards, we are still leaving the enablement of runtime PM to the SDIO init sequence since it depends on the capabilities of the SDIO func driver. Moreover, when the blk device is being suspended, we make sure the device will be runtime resumed. The reason for doing this is that we want the host suspend sequence to be unaware of any runtime power save operations done for the card in this phase. Thus it can just handle the suspend as the card is fully powered from a runtime perspective. Finally, this patch prepares to make it possible to move BKOPS handling into the runtime callbacks for the mmc bus_ops. Thus IDLE BKOPS can be accomplished. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc')
-rw-r--r--include/linux/mmc/core.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index bd06ff566bfc..443243b241d5 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -190,6 +190,9 @@ extern int __mmc_claim_host(struct mmc_host *host, atomic_t *abort);
extern void mmc_release_host(struct mmc_host *host);
extern int mmc_try_claim_host(struct mmc_host *host);
+extern void mmc_get_card(struct mmc_card *card);
+extern void mmc_put_card(struct mmc_card *card);
+
extern int mmc_flush_cache(struct mmc_card *);
extern int mmc_detect_card_removed(struct mmc_host *host);