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hwmon: (lm70) Code streamlining and cleanup

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This fixes a byteswap bug in the LM70 temperature sensor driver,
which was previously covered up by a converse bug in the driver
for the LM70EVAL-LLP board (which is also fixed).

Other fixes:  doc updates, remove an annoying msleep(), and improve
three-wire protocol handling.

Signed-off-by: Kaiwan N Billimoria <[email protected]>
[ [email protected]: doc and whitespace tweaks ]
Signed-off-by: David Brownell <[email protected]>
Signed-off-by: Jean Delvare <[email protected]>
This commit is contained in:
Kaiwan N Billimoria 2009-01-07 16:37:34 +01:00 • committed by Jean Delvare
commit 2b7300513b
4 changed files with 31 additions and 25 deletions
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10
Documentation/spi/spi-lm70llp
View file

@ -13,10 +13,20 @@ Description
This driver provides glue code connecting a National Semiconductor LM70 LLP
temperature sensor evaluation board to the kernel's SPI core subsystem.
This is a SPI master controller driver. It can be used in conjunction with
(layered under) the LM70 logical driver (a "SPI protocol driver").
In effect, this driver turns the parallel port interface on the eval board
into a SPI bus with a single device, which will be driven by the generic
LM70 driver (drivers/hwmon/lm70.c).
Hardware Interfacing
--------------------
The schematic for this particular board (the LM70EVAL-LLP) is
available (on page 4) here:
http://www.national.com/appinfo/tempsensors/files/LM70LLPEVALmanual.pdf
The hardware interfacing on the LM70 LLP eval board is as follows:
Parallel LM70 LLP