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# Copyright (c) 2019 Bolt Innovation Management, LLC
# Copyright (c) 2019 Peter Bigot Consulting, LLC
# SPDX-License-Identifier: Apache-2.0
menu "LittleFS Settings"
visible if FILE_SYSTEM_LITTLEFS
config FS_LITTLEFS_NUM_FILES
int "Maximum number of opened files"
default 4
help
This is a global maximum across all mounted littlefs filesystems.
config FS_LITTLEFS_NUM_DIRS
int "Maximum number of opened directories"
default 4
help
This is a global maximum across all mounted littlefs filesystems.
config FS_LITTLEFS_READ_SIZE
int "Minimum size of a block read"
default 16
help
All read operations will be a multiple of this value.
config FS_LITTLEFS_PROG_SIZE
int "Minimum size of a block program"
default 16
help
All program operations will be a multiple of this value.
config FS_LITTLEFS_CACHE_SIZE
int "Size of block caches in bytes"
default 64
help
Each cache buffers a portion of a block in RAM. The littlefs
needs a read cache, a program cache, and one additional cache
per file. Larger caches can improve performance by storing
more data and reducing the number of disk accesses. Must be a
multiple of the read and program sizes of the underlying flash
device, and a factor of the block size.
config FS_LITTLEFS_LOOKAHEAD_SIZE
int "Size of lookahead buffer in bytes"
default 32
help
A larger lookahead buffer increases the number of blocks found
during an allocation pass. The lookahead buffer is stored as a
compact bitmap, so each byte of RAM can track 8 blocks. Must
be a multiple of 8.
config FS_LITTLEFS_BLOCK_CYCLES
int "Number of erase cycles before moving data to another block"
default 512
help
For dynamic wear leveling, the number of erase cycles before data
is moved to another block. Set to a non-positive value to
disable leveling.
menuconfig FS_LITTLEFS_FC_MEM_POOL
bool "Enable flexible file cache sizes for littlefs"
help
littlefs requires a per-file buffer to cache data. For
applications that use the default configuration parameters a
memory slab is reserved to support up to
FS_LITTLE_FS_NUM_FILES blocks of FS_LITTLEFS_CACHE_SIZE bytes.
When applications customize littlefs configurations and
support different cache sizes for different partitions this
preallocation is inadequate.
Select this feature to enable a memory pool allocator for
littlefs file caches.
if FS_LITTLEFS_FC_MEM_POOL
config FS_LITTLEFS_FC_MEM_POOL_MIN_SIZE
int "Minimum block size for littlefs file cache memory pool"
default 16
config FS_LITTLEFS_FC_MEM_POOL_MAX_SIZE
int "Maximum block size for littlefs file cache memory pool"
default 1024
config FS_LITTLEFS_FC_MEM_POOL_NUM_BLOCKS
int "Number of maximum sized blocks in littlefs file cache memory pool"
default 2
endif # FS_LITTLEFS_FC_MEM_POOL
endmenu