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Based on kernel version 3.3. Page generated on 2012-03-23 21:23 EST.

1	What:		/sys/class/mtd/
2	Date:		April 2009
3	KernelVersion:	2.6.29
4	Contact:	linux-mtd@lists.infradead.org
5	Description:
6			The mtd/ class subdirectory belongs to the MTD subsystem
7			(MTD core).
8	
9	What:		/sys/class/mtd/mtdX/
10	Date:		April 2009
11	KernelVersion:	2.6.29
12	Contact:	linux-mtd@lists.infradead.org
13	Description:
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	
20	What:		/sys/class/mtd/mtdXro/
21	Date:		April 2009
22	KernelVersion:	2.6.29
23	Contact:	linux-mtd@lists.infradead.org
24	Description:
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	
29	What:		/sys/class/mtd/mtdX/dev
30	Date:		April 2009
31	KernelVersion:	2.6.29
32	Contact:	linux-mtd@lists.infradead.org
33	Description:
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	
38	What:		/sys/class/mtd/mtdXro/dev
39	Date:		April 2009
40	KernelVersion:	2.6.29
41	Contact:	linux-mtd@lists.infradead.org
42	Description:
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	
47	What:		/sys/class/mtd/mtdX/erasesize
48	Date:		April 2009
49	KernelVersion:	2.6.29
50	Contact:	linux-mtd@lists.infradead.org
51	Description:
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	
57	What:		/sys/class/mtd/mtdX/flags
58	Date:		April 2009
59	KernelVersion:	2.6.29
60	Contact:	linux-mtd@lists.infradead.org
61	Description:
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	
70	What:		/sys/class/mtd/mtdX/name
71	Date:		April 2009
72	KernelVersion:	2.6.29
73	Contact:	linux-mtd@lists.infradead.org
74	Description:
75			A human-readable ASCII name for the device or partition.
76			This will match the name in /proc/mtd .
77	
78	What:		/sys/class/mtd/mtdX/numeraseregions
79	Date:		April 2009
80	KernelVersion:	2.6.29
81	Contact:	linux-mtd@lists.infradead.org
82	Description:
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	
87	What:		/sys/class/mtd/mtdX/oobsize
88	Date:		April 2009
89	KernelVersion:	2.6.29
90	Contact:	linux-mtd@lists.infradead.org
91	Description:
92			Number of OOB bytes per page.
93	
94	What:		/sys/class/mtd/mtdX/size
95	Date:		April 2009
96	KernelVersion:	2.6.29
97	Contact:	linux-mtd@lists.infradead.org
98	Description:
99			Total size of the device/partition, in bytes.
100	
101	What:		/sys/class/mtd/mtdX/type
102	Date:		April 2009
103	KernelVersion:	2.6.29
104	Contact:	linux-mtd@lists.infradead.org
105	Description:
106			One of the following ASCII strings, representing the device
107			type:
108	
109			absent, ram, rom, nor, nand, dataflash, ubi, unknown
110	
111	What:		/sys/class/mtd/mtdX/writesize
112	Date:		April 2009
113	KernelVersion:	2.6.29
114	Contact:	linux-mtd@lists.infradead.org
115	Description:
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.
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