Files
OpenCellular/common
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
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