Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) What:		/sys/class/mtd/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 		The mtd/ class subdirectory belongs to the MTD subsystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 		(MTD core).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) What:		/sys/class/mtd/mtdX/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 		The /sys/class/mtd/mtd{0,1,2,3,...} directories correspond
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 		to each /dev/mtdX character device.  These may represent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 		physical/simulated flash devices, partitions on a flash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 		device, or concatenated flash devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) What:		/sys/class/mtd/mtdXro/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 		These directories provide the corresponding read-only device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		nodes for /sys/class/mtd/mtdX/ .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) What:		/sys/class/mtd/mtdX/dev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		Major and minor numbers of the character device corresponding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		to this MTD device (in <major>:<minor> format).  This is the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		read-write device so <minor> will be even.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) What:		/sys/class/mtd/mtdXro/dev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		Major and minor numbers of the character device corresponding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		to the read-only variant of thie MTD device (in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		<major>:<minor> format).  In this case <minor> will be odd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) What:		/sys/class/mtd/mtdX/erasesize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		"Major" erase size for the device.  If numeraseregions is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		zero, this is the eraseblock size for the entire device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		Otherwise, the MEMGETREGIONCOUNT/MEMGETREGIONINFO ioctls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		can be used to determine the actual eraseblock layout.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) What:		/sys/class/mtd/mtdX/flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		A hexadecimal value representing the device flags, ORed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		together:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		0x0400: MTD_WRITEABLE - device is writable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		0x0800: MTD_BIT_WRITEABLE - single bits can be flipped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		0x1000: MTD_NO_ERASE - no erase necessary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		0x2000: MTD_POWERUP_LOCK - always locked after reset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) What:		/sys/class/mtd/mtdX/name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		A human-readable ASCII name for the device or partition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		This will match the name in /proc/mtd .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) What:		/sys/class/mtd/mtdX/numeraseregions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		For devices that have variable eraseblock sizes, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		provides the total number of erase regions.  Otherwise,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		it will read back as zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) What:		/sys/class/mtd/mtdX/oobsize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		Number of OOB bytes per page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) What:		/sys/class/mtd/mtdX/size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		Total size of the device/partition, in bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) What:		/sys/class/mtd/mtdX/type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		One of the following ASCII strings, representing the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		type:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		absent, ram, rom, nor, nand, mlc-nand, dataflash, ubi, unknown
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) What:		/sys/class/mtd/mtdX/writesize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) Date:		April 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) KernelVersion:	2.6.29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		Minimal writable flash unit size.  This will always be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		a positive integer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		In the case of NOR flash it is 1 (even though individual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		bits can be cleared).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		In the case of NAND flash it is one NAND page (or a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		half page, or a quarter page).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		In the case of ECC NOR, it is the ECC block size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) What:		/sys/class/mtd/mtdX/ecc_strength
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) Date:		April 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) KernelVersion:	3.4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		Maximum number of bit errors that the device is capable of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		correcting within each region covering an ECC step (see
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		ecc_step_size).  This will always be a non-negative integer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		In the case of devices lacking any ECC capability, it is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) What:		/sys/class/mtd/mtdX/bitflip_threshold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) Date:		April 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) KernelVersion:	3.4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		This allows the user to examine and adjust the criteria by which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		mtd returns -EUCLEAN from mtd_read() and mtd_read_oob().  If the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		maximum number of bit errors that were corrected on any single
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		region comprising an ecc step (as reported by the driver) equals
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		or exceeds this value, -EUCLEAN is returned.  Otherwise, absent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		an error, 0 is returned.  Higher layers (e.g., UBI) use this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		return code as an indication that an erase block may be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		degrading and should be scrutinized as a candidate for being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		marked as bad.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		The initial value may be specified by the flash device driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		If not, then the default value is ecc_strength.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		The introduction of this feature brings a subtle change to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		meaning of the -EUCLEAN return code.  Previously, it was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		interpreted to mean simply "one or more bit errors were
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		corrected".  Its new interpretation can be phrased as "a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		dangerously high number of bit errors were corrected on one or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		more regions comprising an ecc step".  The precise definition of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		"dangerously high" can be adjusted by the user with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		bitflip_threshold.  Users are discouraged from doing this,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		however, unless they know what they are doing and have intimate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		knowledge of the properties of their device.  Broadly speaking,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		bitflip_threshold should be low enough to detect genuine erase
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		block degradation, but high enough to avoid the consequences of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		a persistent return value of -EUCLEAN on devices where sticky
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		bitflips occur.  Note that if bitflip_threshold exceeds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		ecc_strength, -EUCLEAN is never returned by the read operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		Conversely, if bitflip_threshold is zero, -EUCLEAN is always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		returned, absent a hard error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		This is generally applicable only to NAND flash devices with ECC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		capability.  It is ignored on devices lacking ECC capability;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		i.e., devices for which ecc_strength is zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) What:		/sys/class/mtd/mtdX/ecc_step_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) Date:		May 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) KernelVersion:	3.10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		The size of a single region covered by ECC, known as the ECC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		step.  Devices may have several equally sized ECC steps within
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		each writesize region.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		It will always be a non-negative integer.  In the case of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		devices lacking any ECC capability, it is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) What:		/sys/class/mtd/mtdX/ecc_failures
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) Date:		June 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) KernelVersion:	3.17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		The number of failures reported by this device's ECC. Typically,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		these failures are associated with failed read operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		It will always be a non-negative integer.  In the case of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		devices lacking any ECC capability, it is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) What:		/sys/class/mtd/mtdX/corrected_bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) Date:		June 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) KernelVersion:	3.17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		The number of bits that have been corrected by means of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		device's ECC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		It will always be a non-negative integer.  In the case of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		devices lacking any ECC capability, it is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) What:		/sys/class/mtd/mtdX/bad_blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) Date:		June 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) KernelVersion:	3.17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		The number of blocks marked as bad, if any, in this partition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) What:		/sys/class/mtd/mtdX/bbt_blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) Date:		June 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) KernelVersion:	3.17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		The number of blocks that are marked as reserved, if any, in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		this partition. These are typically used to store the in-flash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		bad block table (BBT).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) What:		/sys/class/mtd/mtdX/offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) Date:		March 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) KernelVersion:	4.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		For a partition, the offset of that partition from the start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		of the parent (another partition or a flash device) in bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		This attribute is absent on flash devices, so it can be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		to distinguish them from partitions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) What:		/sys/class/mtd/mtdX/oobavail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) Date:		April 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) KernelVersion:	4.16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) Contact:	linux-mtd@lists.infradead.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		Number of bytes available for a client to place data into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		the out of band area.