diff options
| author | Adrian Hunter <adrian.hunter@nokia.com> | 2009-09-23 03:44:33 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 18:39:33 +0400 |
| commit | eae1aeeed852aae37621b82a9e7f6c05096a18fd (patch) | |
| tree | 6a1b108032a5cf08ccfa6fffa29c81cccbe8c82d /drivers/mmc/core/core.h | |
| parent | 9feae246963c648b212abad0f0eb8938de5f5fe5 (diff) | |
| download | linux-eae1aeeed852aae37621b82a9e7f6c05096a18fd.tar.xz | |
mmc: add ability to save power by powering off cards
Power can be saved by powering off cards that are not in use. This is
similar to suspend / resume except it is under the control of the driver,
and does not require any power management support. It can only be used
when the driver can monitor whether the card is removed, otherwise it is
unsafe. This is possible because, unlike suspend, the driver still
receives card detect and / or cover switch interrupts.
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>
Diffstat (limited to 'drivers/mmc/core/core.h')
| -rw-r--r-- | drivers/mmc/core/core.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index c819effa1032..f7eb4c4ca014 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -20,6 +20,8 @@ struct mmc_bus_ops { void (*detect)(struct mmc_host *); void (*suspend)(struct mmc_host *); void (*resume)(struct mmc_host *); + void (*power_save)(struct mmc_host *); + void (*power_restore)(struct mmc_host *); }; void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops); |