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| author | Thomas Cort <tcort@minix3.org> | 2013-07-26 19:44:52 -0400 |
|---|---|---|
| committer | Thomas Cort <tcort@minix3.org> | 2013-07-27 08:21:37 -0400 |
| commit | 437177b028e7fd39ddf81c22570fa13b6c22c565 (patch) | |
| tree | 4d202924b47ecfeea471dbd1aa71be24ceb9d782 /sys/dev?id=437177b028e7fd39ddf81c22570fa13b6c22c565 | |
| parent | 11be35a165022172ed3cea20f2b5df0307540b0e (diff) | |
i2c: increase BUFLEN/CMDLEN to 128, add page flag.
128 byte reads are much more common than 32 byte reads. The message
passing + setup/teardown for a read is much more expensive, in terms
of time, than the reading itself. A slightly bigger struct is well
worth the time savings. This reduces read times for /dev/eeprom
from 57 seconds per 4KB to 14 seconds.
Additionally, make sending the page address in the eeprom driver
and utility optional. This can save a little time when reading
within the same page and allows support for smaller devices that
don't support pages (example: chips containing EDID).
Change-Id: Ie48087caee40c11fa241d1555fce9309ddd27b43
Diffstat (limited to 'sys/dev?id=437177b028e7fd39ddf81c22570fa13b6c22c565')
0 files changed, 0 insertions, 0 deletions