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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | What: /sys/class/mtd/ Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: The mtd/ class subdirectory belongs to the MTD subsystem (MTD core). What: /sys/class/mtd/mtdX/ Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: The /sys/class/mtd/mtd{0,1,2,3,...} directories correspond to each /dev/mtdX character device. These may represent physical/simulated flash devices, partitions on a flash device, or concatenated flash devices. They exist regardless of whether CONFIG_MTD_CHAR is actually enabled. What: /sys/class/mtd/mtdXro/ Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: These directories provide the corresponding read-only device nodes for /sys/class/mtd/mtdX/ . They are only created (for the benefit of udev) if CONFIG_MTD_CHAR is enabled. What: /sys/class/mtd/mtdX/dev Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: Major and minor numbers of the character device corresponding to this MTD device (in <major>:<minor> format). This is the read-write device so <minor> will be even. What: /sys/class/mtd/mtdXro/dev Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: Major and minor numbers of the character device corresponding to the read-only variant of thie MTD device (in <major>:<minor> format). In this case <minor> will be odd. What: /sys/class/mtd/mtdX/erasesize Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: "Major" erase size for the device. If numeraseregions is zero, this is the eraseblock size for the entire device. Otherwise, the MEMGETREGIONCOUNT/MEMGETREGIONINFO ioctls can be used to determine the actual eraseblock layout. What: /sys/class/mtd/mtdX/flags Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: A hexadecimal value representing the device flags, ORed together: 0x0400: MTD_WRITEABLE - device is writable 0x0800: MTD_BIT_WRITEABLE - single bits can be flipped 0x1000: MTD_NO_ERASE - no erase necessary 0x2000: MTD_POWERUP_LOCK - always locked after reset What: /sys/class/mtd/mtdX/name Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: A human-readable ASCII name for the device or partition. This will match the name in /proc/mtd . What: /sys/class/mtd/mtdX/numeraseregions Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: For devices that have variable eraseblock sizes, this provides the total number of erase regions. Otherwise, it will read back as zero. What: /sys/class/mtd/mtdX/oobsize Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: Number of OOB bytes per page. What: /sys/class/mtd/mtdX/size Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: Total size of the device/partition, in bytes. What: /sys/class/mtd/mtdX/type Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: One of the following ASCII strings, representing the device type: absent, ram, rom, nor, nand, dataflash, ubi, unknown What: /sys/class/mtd/mtdX/writesize Date: April 2009 KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: Minimal writable flash unit size. This will always be a positive integer. In the case of NOR flash it is 1 (even though individual bits can be cleared). In the case of NAND flash it is one NAND page (or a half page, or a quarter page). In the case of ECC NOR, it is the ECC block size. |