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Commit 1f9327fc authored by Robert Jarzmik's avatar Robert Jarzmik Committed by David Woodhouse
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Documentation: add sysfs entries for mtd docg3 chips 



Add documentation for MSystems disk-on-chip docg3 chips
sysfs entries, which enable and disable protection areas,
giving or disabling access to the chip's memory.

Signed-off-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent b49e345e

Documentation/ABI/testing/sysfs-devices-platform-docg3

0 → 100644
+34 −0
Original line number Diff line number Diff line 
What:		/sys/devices/platform/docg3/f[0-3]_dps[01]_is_keylocked

Date:		November 2011

KernelVersion:	3.3

Contact:	Robert Jarzmik <robert.jarzmik@free.fr>

Description:

		Show whether the floor (0 to 4), protection area (0 or 1) is

		keylocked. Each docg3 chip (or floor) has 2 protection areas,

		which can cover any part of it, block aligned, called DPS.

		The protection has information embedded whether it blocks reads,

		writes or both.

		The result is:

		0 -> the DPS is not keylocked

		1 -> the DPS is keylocked

Users:		None identified so far.



What:		/sys/devices/platform/docg3/f[0-3]_dps[01]_protection_key

Date:		November 2011

KernelVersion:	3.3

Contact:	Robert Jarzmik <robert.jarzmik@free.fr>

Description:

		Enter the protection key for the floor (0 to 4), protection area

		(0 or 1). Each docg3 chip (or floor) has 2 protection areas,

		which can cover any part of it, block aligned, called DPS.

		The protection has information embedded whether it blocks reads,

		writes or both.

		The protection key is a string of 8 bytes (value 0-255).

		Entering the correct value toggle the lock, and can be observed

		through f[0-3]_dps[01]_is_keylocked.

		Possible values are:

			- 8 bytes

		Typical values are:

			- "00000000"

			- "12345678"

Users:		None identified so far.