linux/drivers/w1
Jean-Francois Dagenais d5528773e6 drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode
Power-up timing

The DS2408 is sensitive to the power-on slew rate and can inadvertently
power up with a test mode feature enabled.  When this occurs, the P0 port
does not respond to the Channel Access Write command.  For most reliable
operation, it is recommended to disable the test mode after every power-on
reset using the Disable Test Mode sequence shown below.  The 64-bit ROM
code must be transmitted in the same bit sequence as with the Match ROM
command, i.e., least significant bit first.  This precaution is
recommended in parasite power mode (VCC pin connected to GND) as well as
with VCC power.

Disable Test Mode:
RST,PD,96h,<64-bit DS2408 ROM Code>,3Ch,RST,PD

[akpm@linux-foundation.org: don't use kerenldoc token to introduce a non-kerneldoc comment, tweak whitespace]
Signed-off-by: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:08:06 -07:00
..
masters Merge 3.10-rc3 into char-misc-next 2013-05-27 10:40:19 +09:00
slaves drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode 2013-07-03 16:08:06 -07:00
Kconfig Kconfig: replace "--- help ---" with "---help---" 2012-05-07 15:01:22 +02:00
Makefile
w1_family.c drivers/w1: Add export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:32:00 -04:00
w1_family.h w1: add support for DS2413 Dual Channel Addressable Switch 2013-02-27 19:10:23 -08:00
w1_int.c w1: Fix a typo in 'hardware' word 2012-06-18 16:41:06 -07:00
w1_int.h MAINTAINERS: Evgeniy has moved 2011-08-25 16:25:33 -07:00
w1_io.c w1: Disable irqs during 1-wire bus operations, extend 1-wire reset pulse 2012-04-11 16:44:10 -07:00
w1_log.h MAINTAINERS: Evgeniy has moved 2011-08-25 16:25:33 -07:00
w1_netlink.c MAINTAINERS: Evgeniy has moved 2011-08-25 16:25:33 -07:00
w1_netlink.h MAINTAINERS: Evgeniy has moved 2011-08-25 16:25:33 -07:00
w1.c w1: add family based automatic module loading 2013-06-03 14:09:14 -07:00
w1.h W1: split master mutex to avoid deadlocks. 2012-06-13 16:38:40 -07:00