This driver emulates a EEPROM device in flash.
Reworked implementation with modified flash layout.
The emulation represents the EEPROM in flash as a region that is a
direct map of the eeprom data followed by a region where changes to
the eeprom data is stored. Changes are written as address-data
combinations. The size of such a combination is determined by the
flash write block size and the size of the eeprom (required address
space), with a minimum of 4 byte.
The eeprom page needs to be a multiple of the flash page. Multiple
eeprom pages is also so supported and increases the number of writes
that can be performed.
The eeprom size, pagesize and the flash partition used for the eeprom
are defined in the dts. The flash partition should allow at least two
eeprom pages. For fast read access a rambuffer can be enabled for the
eeprom (by setting the option rambuf in the dts).
Signed-off-by: Laczen JMS <laczenjms@gmail.com>
This patch adds adds an EEPROM driver supporting the on-chip EEPROM
found on NXP LPC11U6X MCUs. Note that this driver is only a wrapper
relying entirely on the IAP (In-Application Programming) EEPROM
commands.
Signed-off-by: Simon Guinot <simon.guinot@seagate.com>
EEPROM simulator and native_posix have been unified to one solution,
the old eeprom,native_posix is removed.
Signed-off-by: Laczen JMS <laczenjms@gmail.com>
Add support for a eeprom simulator. The PR limits the addition to
qemu_x86 but it can easily be added to other devices by defining the
eeprom simulator in the dts and setting 'CONFIG_EEPROM_SIMULATOR=y'
Signed-off-by: Laczen JMS <laczenjms@gmail.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Add driver for emulating an EEPROM device using the native POSIX
board. The EEPROM is backed by a binary file in the host file system.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
Add API for accessing Electrically Erasable Programmable Read-Only
Memory (EEPROM) devices.
EEPROMs have an erase block size of 1 byte, a long lifetime, and allows
overwriting data on byte-by-byte access.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
Jay Vasanth