diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2015-05-06 21:31:19 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-06-01 10:06:59 +0300 |
| commit | 9f6e0bff2afb52a4c29f5ca8a4db01810357974e (patch) | |
| tree | 427a344078d58843f9d5a7fcc1f303c54ff26dc6 /include/linux/mmc | |
| parent | 0250fdf257b1e5febba19b7cc536a3c9431e50bf (diff) | |
| download | linux-9f6e0bff2afb52a4c29f5ca8a4db01810357974e.tar.xz | |
mmc: Add support for disabling write-protect detection
It is not uncommon to see systems where there is no physical write-protect
signal (e.g. when using eMMC or microSD card slots). For some controllers,
which have a dedicated write-protection detection logic (like SDHCI
controllers), the get_ro() callback can return bogus data in such a case.
Instead of handling this on a per controller basis this patch adds a new
capability flag to the MMC core that can be set to specify that the result
of get_ro() is invalid. When the flag is set the core will not call
get_ro() and assume that the card is always read-write.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index f471193ef6d6..433eccb50838 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -286,6 +286,7 @@ struct mmc_host { MMC_CAP2_HS400_1_2V) #define MMC_CAP2_HSX00_1_2V (MMC_CAP2_HS200_1_2V_SDR | MMC_CAP2_HS400_1_2V) #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17) +#define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */ mmc_pm_flag_t pm_caps; /* supported pm features */ |