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authorKyungmin Park <kyungmin.park@samsung.com>2011-10-18 09:34:04 +0900
committerChris Ball <cjb@laptop.org>2011-10-26 16:32:27 -0400
commitb3bf915308ca2b50f3beec6cc824083870f0f4b5 (patch)
tree955978242b333e1388358b4b50b5f8f4a5abca04 /include/linux/mmc/card.h
parentd9ddd62943ee07a75d0428ffcf52f1a747a28c39 (diff)
mmc: core: new discard feature support at eMMC v4.5
MMC v4.5 supports the DISCARD feature (CMD38). It's different from trim and there's no check bit. Currently it's only supported at v4.5. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc/card.h')
-rw-r--r--include/linux/mmc/card.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 711c3f8bfabd..551378508784 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -80,6 +80,9 @@ struct mmc_ext_csd {
u8 raw_sec_feature_support;/* 231 */
u8 raw_trim_mult; /* 232 */
u8 raw_sectors[4]; /* 212 - 4 bytes */
+
+ unsigned int feature_support;
+#define MMC_DISCARD_FEATURE BIT(0) /* CMD38 feature */
};
struct sd_scr {