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authorClemens Ladisch <clemens@ladisch.de>2011-02-16 08:02:08 -0500
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-02-16 08:18:32 -0800
commitd5622f5b6c4671d1588ccc9056705366d4eb312a (patch)
treea1cf8a6ad056f4e13be6185399c1b732984e364c
parente866729605a43a739fc56023a8530b07a93d3458 (diff)
downloadlinux-linaro-android-d5622f5b6c4671d1588ccc9056705366d4eb312a.tar.gz
hwmon: (jc42) more helpful documentation
The documentation lists standard numbers and chip names in excruciating detail, but that's all it does. To help mere mortals in deciding whether to enable this driver, mention what this sensor is for and in which systems it might be found. Also add a link to the actual JC 42.4 specification. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: stable@kernel.org Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
-rw-r--r--Documentation/hwmon/jc429
-rw-r--r--drivers/hwmon/Kconfig11
2 files changed, 13 insertions, 7 deletions
diff --git a/Documentation/hwmon/jc42 b/Documentation/hwmon/jc42
index 0e76ef12e4c..2a0924003f9 100644
--- a/Documentation/hwmon/jc42
+++ b/Documentation/hwmon/jc42
@@ -51,7 +51,8 @@ Supported chips:
* JEDEC JC 42.4 compliant temperature sensor chips
Prefix: 'jc42'
Addresses scanned: I2C 0x18 - 0x1f
- Datasheet: -
+ Datasheet:
+ http://www.jedec.org/sites/default/files/docs/4_01_04R19.pdf
Author:
Guenter Roeck <guenter.roeck@ericsson.com>
@@ -60,7 +61,11 @@ Author:
Description
-----------
-This driver implements support for JEDEC JC 42.4 compliant temperature sensors.
+This driver implements support for JEDEC JC 42.4 compliant temperature sensors,
+which are used on many DDR3 memory modules for mobile devices and servers. Some
+systems use the sensor to prevent memory overheating by automatically throttling
+the memory controller.
+
The driver auto-detects the chips listed above, but can be manually instantiated
to support other JC 42.4 compliant chips.
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 773e484f164..412339451a3 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -455,13 +455,14 @@ config SENSORS_JZ4740
called jz4740-hwmon.
config SENSORS_JC42
- tristate "JEDEC JC42.4 compliant temperature sensors"
+ tristate "JEDEC JC42.4 compliant memory module temperature sensors"
depends on I2C
help
- If you say yes here you get support for Jedec JC42.4 compliant
- temperature sensors. Support will include, but not be limited to,
- ADT7408, CAT34TS02,, CAT6095, MAX6604, MCP9805, MCP98242, MCP98243,
- MCP9843, SE97, SE98, STTS424, TSE2002B3, and TS3000B3.
+ If you say yes here, you get support for JEDEC JC42.4 compliant
+ temperature sensors, which are used on many DDR3 memory modules for
+ mobile devices and servers. Support will include, but not be limited
+ to, ADT7408, CAT34TS02, CAT6095, MAX6604, MCP9805, MCP98242, MCP98243,
+ MCP9843, SE97, SE98, STTS424(E), TSE2002B3, and TS3000B3.
This driver can also be built as a module. If so, the module
will be called jc42.