diff options
| author | Elie De Brauwer <[email protected]> | 2013-09-17 19:48:22 +0200 |
|---|---|---|
| committer | David Woodhouse <[email protected]> | 2013-09-27 05:56:22 -0500 |
| commit | 2b468ef0e7959b703626b64c4d264ef822c9267a (patch) | |
| tree | 7f8c4471558965162b2a8626f4fb288441462600 /tools/perf/util/trace-event-scripting.c | |
| parent | 5cb1327172281cadb7ee8c5fa294d7ac8e09b8db (diff) | |
mtd: m25p80: Fix 4 byte addressing mode for Micron devices.
According to the datasheet for Micron n25q256a (N25Q256A13ESF40F) 4-byte
addressing mode should be entered as follows:
<quote>
To enter or exit the 4-byte address mode, the WRITE ENABLE command
must be executed to set the write enable latch bit to 1. (Note: The
WRITE ENABLE command must NOT be executed on the N25Q256A83ESF40x and
N25Q256A83E1240x devices.) S# must be driven LOW. The effect of the
command is immediate; after the command has been executed, the write
enable latch bit is cleared to 0.
</quote>
Micron's portable way to perform this for all types of Micron flash
is to first issue a write enable, then switch the addressing mode
followed by a write disable to avoid leaving the flash in a write-
able state.
Signed-off-by: Elie De Brauwer <[email protected]>
[Brian: reworked a bit]
Signed-off-by: Brian Norris <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions