minix/sys/dev/i2c
Thomas Cort 437177b028 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
2013-07-27 08:21:37 -04:00
..
i2c_io.h i2c: increase BUFLEN/CMDLEN to 128, add page flag. 2013-07-27 08:21:37 -04:00
Makefile include: Import dev/i2c/i2c_io.h 2013-06-27 14:20:12 -04:00