summaryrefslogtreecommitdiff
path: root/include/linux/mmc
diff options
context:
space:
mode:
authorLars-Peter Clausen <lars@metafoo.de>2015-05-06 21:31:19 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2015-06-01 10:06:59 +0300
commit9f6e0bff2afb52a4c29f5ca8a4db01810357974e (patch)
tree427a344078d58843f9d5a7fcc1f303c54ff26dc6 /include/linux/mmc
parent0250fdf257b1e5febba19b7cc536a3c9431e50bf (diff)
downloadlinux-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.h1
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 */