path: root/Documentation/spi
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authorKaiwan N Billimoria <kaiwan@designergraphix.com>2009-01-07 16:37:34 +0100
committerJean Delvare <khali@linux-fr.org>2009-01-07 16:37:34 +0100
commit2b7300513b98e05058a803de3beb8a1c0a0c61d9 (patch)
tree279b61da3b204e44bc52ad62a4836e28ffce1bde /Documentation/spi
parent0589c2de643ef71a684ba6d219532f9e2a3e554b (diff)
hwmon: (lm70) Code streamlining and cleanup
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 <kaiwan@designergraphix.com> [ dbrownell@users.sourceforge.net: doc and whitespace tweaks ] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation/spi')
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/spi/spi-lm70llp b/Documentation/spi/spi-lm70llp
index 154bd02220b9..34a9cfd746bd 100644
--- a/Documentation/spi/spi-lm70llp
+++ b/Documentation/spi/spi-lm70llp
@@ -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