diff options
| author | Kaiwan N Billimoria <kaiwan@designergraphix.com> | 2009-01-07 18:37:34 +0300 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-01-07 18:37:34 +0300 |
| commit | 2b7300513b98e05058a803de3beb8a1c0a0c61d9 (patch) | |
| tree | 279b61da3b204e44bc52ad62a4836e28ffce1bde /Documentation | |
| parent | 0589c2de643ef71a684ba6d219532f9e2a3e554b (diff) | |
| download | linux-2b7300513b98e05058a803de3beb8a1c0a0c61d9.tar.xz | |
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')
| -rw-r--r-- | Documentation/hwmon/lm70 | 4 | ||||
| -rw-r--r-- | Documentation/spi/spi-lm70llp | 10 |
2 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm70 b/Documentation/hwmon/lm70 index 2bdd3feebf53..b8d1a521e689 100644 --- a/Documentation/hwmon/lm70 +++ b/Documentation/hwmon/lm70 @@ -25,6 +25,10 @@ complement digital temperature (sent via the SIO line), is available in the driver for interpretation. This driver makes use of the kernel's in-core SPI support. +As a real (in-tree) example of this "SPI protocol driver" interfacing +with a "SPI master controller driver", see drivers/spi/spi_lm70llp.c +and its associated documentation. + Thanks to --------- Jean Delvare <khali@linux-fr.org> for mentoring the hwmon-side driver 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 |