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Nadim Taha c0feba66a2 common/spi_nor: Differential erase support 
If CONFIG_SPI_NOR_SMART_ERASE is defined will read the sector/block
to be erased first and only initiate the erase operation if not
already in an erased state. The read operation (performed in
CONFIG_SPI_NOR_MAX_READ_SIZE chunks) is aborted early if a
non "0xff" byte is encountered.

Reduced erase time of a mostly erased EEPROM from 44s to 20s (16MB
Winbond part) / 1m22s to 40s (32MB Macronix part) @24MHz.

BUG=None
BRANCH=None
TEST=Built all targets. Successfully flashed various EEPROM images.

Change-Id: I369b1fcf72140663b8dbce5a469ebad27f7571ec
Signed-off-by: Nadim Taha <ntaha@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/437988
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
2017-02-09 05:04:56 +00:00
board
cr50: print reset count in sysinfo
2017-02-07 20:14:39 -08:00
builtin
Adding offsetof macro to stddef.h.
2016-10-26 19:59:17 -07:00
chip
cr50: consolidate chip shutdown and resume events
2017-02-07 02:44:43 +00:00
common
common/spi_nor: Differential erase support
2017-02-09 05:04:56 +00:00
core
cleanup: Remove charge_state_v1
2017-02-06 14:50:32 -08:00
cts
eCTS: Test task priority
2016-11-10 21:28:33 -08:00
docs
USB Serial: Add README and update CCD docs
2016-06-15 17:54:51 -07:00
driver
tcpm: it83xx: Add support for TYPEC_CC_OPEN
2017-02-07 20:14:35 -08:00
extra
Revert "servo_v4: Remove PSTATE to create more space in RO"
2016-12-29 19:09:57 -08:00
include
common/spi_nor: Differential erase support
2017-02-09 05:04:56 +00:00
power
ec: delete auron and rambi boards
2017-01-31 21:58:36 -08:00
test
cleanup: Remove charge_state_v1
2017-02-06 14:50:32 -08:00
util
cr50: prepare to release rw 0.0.15
2017-02-07 02:44:57 +00:00
.checkpatch.conf
checkpatch: prevent stupid complaints about description title
2016-07-21 13:13:27 -07:00
.gitignore
Makefile.rules: Add targets to see file size differences
2016-11-15 17:43:21 -08:00
COMMIT-QUEUE.ini
COMMIT-QUEUE.ini: Fix typo.
2016-09-09 19:20:12 -07:00
LICENSE
Add LICENSE file to project
2012-05-11 09:11:52 -07:00
Makefile
makefile: allow different RO and RW CONFIG
2017-01-26 14:23:01 -08:00
Makefile.rules
Makefile.rules: Clean ccache cache for 'clobber'.
2017-01-27 16:44:03 -08:00
Makefile.toolchain
Support alignment for EC host command structures
2016-10-19 20:07:09 -07:00
OWNERS
Add OWNERS files
2014-04-02 19:58:53 +00:00
PRESUBMIT.cfg
Put a newline at the end of PRESUBMIT.cfg
2016-10-07 16:47:02 -07:00
README
README: Add link to quick-build instructions
2015-12-07 13:49:35 -08:00
README.fmap
Update EC config and FMAP to reserve room for vboot signatures
2012-05-04 14:42:58 -07:00
setup.py
ec3po: Add setup script.
2015-12-08 20:05:05 -08:00

README 

For an overview of the Embedded Controller firmware, refer to

http://www.chromium.org/chromium-os/2014-firmware-summit

For instructions on building from source, refer to

http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly
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