[PATCH 3/3] Add Documentation for MMC boot_enable attribute

[Neil Armstrong]

Add documentation on the enable_boot sysfs attribute.

Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxx>
---
 Documentation/mmc/mmc-dev-parts.txt |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/Documentation/mmc/mmc-dev-parts.txt
b/Documentation/mmc/mmc-dev-parts.txt
index f08d078..78228de 100644
--- a/Documentation/mmc/mmc-dev-parts.txt
+++ b/Documentation/mmc/mmc-dev-parts.txt
@@ -38,3 +38,9 @@ feature has been disabled on the card, the file will
be read-only.
 The boot partitions can also be locked permanently, but this feature is
 not accessible through sysfs in order to avoid accidental or malicious
 bricking.
+
+A special attribute named boot_enable is available to configure the
+selected partition for the eMMC 4.3+ boot operation mode.
+When selected between the two factory boot partitions and the main
+user partition, at boot time a special sequence enables makes the
+eMMC device to output the content of the selected partition.
-- 
1.7.0.4

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