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| author | Ohad Ben-Cohen <ohad@wizery.com> | 2011-04-05 17:43:21 +0300 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-05-24 20:59:47 -0400 |
| commit | 6b93d01fe5971951911a070f51f412d50e9536dc (patch) | |
| tree | 0e0221f3af9f954bd60e469f94810730899ee374 /include/linux/mmc | |
| parent | a5e9425d2010978c5f85986cc70a9fa0c0d5b912 (diff) | |
| download | kernel_samsung_smdk4412-6b93d01fe5971951911a070f51f412d50e9536dc.zip kernel_samsung_smdk4412-6b93d01fe5971951911a070f51f412d50e9536dc.tar.gz kernel_samsung_smdk4412-6b93d01fe5971951911a070f51f412d50e9536dc.tar.bz2 | |
mmc: do not switch to 1-bit mode if not required
6b5eda36 followed SDIO spec part E1 section 8, which states that
in case SDIO interrupts are being used to wake up a suspended host,
then it is required to switch to 1-bit mode before stopping the clock.
Before switching to 1-bit mode (or back to 4-bit mode on resume),
make sure that SDIO interrupts are really being used to wake the host.
This is helpful for devices which have an external irq line (e.g.
wl1271), and do not use SDIO interrupts to wake up the host.
In this case, switching to 1-bit mode (and back to 4-bit mode on resume)
is not necessary.
Reported-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 8ad3a9c..0fffa5c 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -325,5 +325,9 @@ static inline int mmc_card_keep_power(struct mmc_host *host) return host->pm_flags & MMC_PM_KEEP_POWER; } +static inline int mmc_card_wake_sdio_irq(struct mmc_host *host) +{ + return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ; +} #endif |