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authorChuanxiao Dong <chuanxiao.dong@intel.com>2011-01-22 04:09:41 +0800
committerChris Ball <cjb@laptop.org>2011-03-15 13:48:01 -0400
commit709de99df0ecf3102e7728fbd876a3591859f423 (patch)
treef1adaa026531d3dcc93cf33c2e8ede84455ca46a /block/noop-iosched.c
parentcfd80652467717ca7346857d6d8c94503d74f3a3 (diff)
mmc: export eMMC4.4 enhanced area details to sysfs
Enhanced area feature is a new feature defined in eMMC4.4 standard. This user data area provides higher performance/reliability, at the expense of using twice the effective media space due to the area using SLC. The MMC driver now reads out the enhanced area offset and size and adds them to the device attributes in sysfs. Enabling the enhanced area can only be done once, and should be done in manufacturing. To use this feature, bit ERASE_GRP_DEF should also be set. Documentation/ABI/testing/sysfs-devices-mmc describes the two new attributes. Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Reviewed-by: Chris Ball <cjb@laptop.org> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'block/noop-iosched.c')
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