diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2015-05-06 20:31:19 +0200 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@nxp.com> | 2016-01-14 10:59:24 -0600 |
| commit | cd1ba3e917cfbb15b66873636ba0c570617d7ae1 (patch) | |
| tree | 445800192bc0d5c1bb89c73fcf81b63bd9321e50 /include/linux/mmc | |
| parent | 8b23307d195dd7fb3e73da7c84d3166c2ceaf487 (diff) | |
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>
(cherry picked from commit 9f6e0bff2afb52a4c29f5ca8a4db01810357974e)
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 */ |