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authorLinus Torvalds <torvalds@linux-foundation.org>2009-06-22 19:56:22 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-22 19:56:22 -0400
commitac1b7c378ef26fba6694d5f118fe7fc16fee2fe2 (patch)
tree3f72979545bb070eb2c3e903cbf31dc4aef3ffc9 /Documentation/ABI
parent9e268beb92ee3a853b3946e84b10358207e2085f (diff)
parentc90173f0907486fe4010c2a8cef534e2473db43f (diff)
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (63 commits) mtd: OneNAND: Allow setting of boundary information when built as module jffs2: leaking jffs2_summary in function jffs2_scan_medium mtd: nand: Fix memory leak on txx9ndfmc probe failure. mtd: orion_nand: use burst reads with double word accesses mtd/nand: s3c6400 support for s3c2410 driver [MTD] [NAND] S3C2410: Use DIV_ROUND_UP [MTD] [NAND] S3C2410: Deal with unaligned lengths in S3C2440 buffer read/write [MTD] [NAND] S3C2410: Allow the machine code to get the BBT table from NAND [MTD] [NAND] S3C2410: Added a kerneldoc for s3c2410_nand_set mtd: physmap_of: Add multiple regions and concatenation support mtd: nand: max_retries off by one in mxc_nand mtd: nand: s3c2410_nand_setrate(): use correct macros for 2412/2440 mtd: onenand: add bbt_wait & unlock_all as replaceable for some platform mtd: Flex-OneNAND support mtd: nand: add OMAP2/OMAP3 NAND driver mtd: maps: Blackfin async: fix memory leaks in probe/remove funcs mtd: uclinux: mark local stuff static mtd: uclinux: do not allow to be built as a module mtd: uclinux: allow systems to override map addr/size mtd: blackfin NFC: fix hang when using NAND on BF527-EZKITs ...
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1What: /sys/class/mtd/
2Date: April 2009
3KernelVersion: 2.6.29
4Contact: linux-mtd@lists.infradead.org
5Description:
6 The mtd/ class subdirectory belongs to the MTD subsystem
7 (MTD core).
8
9What: /sys/class/mtd/mtdX/
10Date: April 2009
11KernelVersion: 2.6.29
12Contact: linux-mtd@lists.infradead.org
13Description:
14 The /sys/class/mtd/mtd{0,1,2,3,...} directories correspond
15 to each /dev/mtdX character device. These may represent
16 physical/simulated flash devices, partitions on a flash
17 device, or concatenated flash devices. They exist regardless
18 of whether CONFIG_MTD_CHAR is actually enabled.
19
20What: /sys/class/mtd/mtdXro/
21Date: April 2009
22KernelVersion: 2.6.29
23Contact: linux-mtd@lists.infradead.org
24Description:
25 These directories provide the corresponding read-only device
26 nodes for /sys/class/mtd/mtdX/ . They are only created
27 (for the benefit of udev) if CONFIG_MTD_CHAR is enabled.
28
29What: /sys/class/mtd/mtdX/dev
30Date: April 2009
31KernelVersion: 2.6.29
32Contact: linux-mtd@lists.infradead.org
33Description:
34 Major and minor numbers of the character device corresponding
35 to this MTD device (in <major>:<minor> format). This is the
36 read-write device so <minor> will be even.
37
38What: /sys/class/mtd/mtdXro/dev
39Date: April 2009
40KernelVersion: 2.6.29
41Contact: linux-mtd@lists.infradead.org
42Description:
43 Major and minor numbers of the character device corresponding
44 to the read-only variant of thie MTD device (in
45 <major>:<minor> format). In this case <minor> will be odd.
46
47What: /sys/class/mtd/mtdX/erasesize
48Date: April 2009
49KernelVersion: 2.6.29
50Contact: linux-mtd@lists.infradead.org
51Description:
52 "Major" erase size for the device. If numeraseregions is
53 zero, this is the eraseblock size for the entire device.
54 Otherwise, the MEMGETREGIONCOUNT/MEMGETREGIONINFO ioctls
55 can be used to determine the actual eraseblock layout.
56
57What: /sys/class/mtd/mtdX/flags
58Date: April 2009
59KernelVersion: 2.6.29
60Contact: linux-mtd@lists.infradead.org
61Description:
62 A hexadecimal value representing the device flags, ORed
63 together:
64
65 0x0400: MTD_WRITEABLE - device is writable
66 0x0800: MTD_BIT_WRITEABLE - single bits can be flipped
67 0x1000: MTD_NO_ERASE - no erase necessary
68 0x2000: MTD_POWERUP_LOCK - always locked after reset
69
70What: /sys/class/mtd/mtdX/name
71Date: April 2009
72KernelVersion: 2.6.29
73Contact: linux-mtd@lists.infradead.org
74Description:
75 A human-readable ASCII name for the device or partition.
76 This will match the name in /proc/mtd .
77
78What: /sys/class/mtd/mtdX/numeraseregions
79Date: April 2009
80KernelVersion: 2.6.29
81Contact: linux-mtd@lists.infradead.org
82Description:
83 For devices that have variable eraseblock sizes, this
84 provides the total number of erase regions. Otherwise,
85 it will read back as zero.
86
87What: /sys/class/mtd/mtdX/oobsize
88Date: April 2009
89KernelVersion: 2.6.29
90Contact: linux-mtd@lists.infradead.org
91Description:
92 Number of OOB bytes per page.
93
94What: /sys/class/mtd/mtdX/size
95Date: April 2009
96KernelVersion: 2.6.29
97Contact: linux-mtd@lists.infradead.org
98Description:
99 Total size of the device/partition, in bytes.
100
101What: /sys/class/mtd/mtdX/type
102Date: April 2009
103KernelVersion: 2.6.29
104Contact: linux-mtd@lists.infradead.org
105Description:
106 One of the following ASCII strings, representing the device
107 type:
108
109 absent, ram, rom, nor, nand, dataflash, ubi, unknown
110
111What: /sys/class/mtd/mtdX/writesize
112Date: April 2009
113KernelVersion: 2.6.29
114Contact: linux-mtd@lists.infradead.org
115Description:
116 Minimal writable flash unit size. This will always be
117 a positive integer.
118
119 In the case of NOR flash it is 1 (even though individual
120 bits can be cleared).
121
122 In the case of NAND flash it is one NAND page (or a
123 half page, or a quarter page).
124
125 In the case of ECC NOR, it is the ECC block size.