Lines Matching +full:erase +full:- +full:size
11 force_ro Enforce read-only access even if write protect switch is off.
17 All attributes are read-only.
34 erase_size Erase group size
35 preferred_erase_size Preferred erase size
36 raw_rpmb_size_mult RPMB partition size
45 Note on Erase Size and Preferred Erase Size:
47 "erase_size" is the minimum size, in bytes, of an erase
48 operation. For MMC, "erase_size" is the erase group size
50 to trim or secure trim operations where the minimum size is
52 if the card is block-addressed, 0 otherwise.
54 SD/MMC cards can erase an arbitrarily large area up to and
58 1. A single erase command will make all other I/O on
62 duration of the erase - which could be a several
64 2. To be able to inform the user of erase progress.
65 3. The erase timeout becomes too large to be very
66 useful. Because the erase timeout contains a margin
67 which is multiplied by the size of the erase area,
71 "erase_size" is not the most efficient unit to erase
74 size for erasing large areas.
76 For MMC, "preferred_erase_size" is the high-capacity
77 erase size if a card specifies one, otherwise it is
81 size specified by the card.
89 RPMB size in byte is calculated by using the following equation:
91 RPMB partition size = 128kB x raw_rpmb_size_mult