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| author | Robert Jarzmik <robert.jarzmik@free.fr> | 2011-11-29 23:16:35 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-01-09 19:12:17 +0100 |
| commit | 1f9327fcffdac27e7b100b3a392291a7b94c97fd (patch) | |
| tree | b2bdc5ebc42b7cdd2b65c185e4b2bf9b0ecb63aa /Documentation | |
| parent | mtd: docg3: dereferencing an ERR_PTR() in docg3_probe() (diff) | |
| download | linux-1f9327fcffdac27e7b100b3a392291a7b94c97fd.tar.xz linux-1f9327fcffdac27e7b100b3a392291a7b94c97fd.zip | |
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: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-platform-docg3 | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-platform-docg3 b/Documentation/ABI/testing/sysfs-devices-platform-docg3 new file mode 100644 index 000000000000..8aa36716882f --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-platform-docg3 @@ -0,0 +1,34 @@ +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. |