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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /Documentation/hwmon/lm95234 | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/hwmon/lm95234')
| -rw-r--r-- | Documentation/hwmon/lm95234 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm95234 b/Documentation/hwmon/lm95234 new file mode 100644 index 000000000..32b777ef2 --- /dev/null +++ b/Documentation/hwmon/lm95234 @@ -0,0 +1,41 @@ +Kernel driver lm95234 +===================== + +Supported chips: + * National Semiconductor / Texas Instruments LM95233 + Addresses scanned: I2C 0x18, 0x2a, 0x2b + Datasheet: Publicly available at the Texas Instruments website + http://www.ti.com/product/lm95233 + * National Semiconductor / Texas Instruments LM95234 + Addresses scanned: I2C 0x18, 0x4d, 0x4e + Datasheet: Publicly available at the Texas Instruments website + http://www.ti.com/product/lm95234 + + +Author: Guenter Roeck <linux@roeck-us.net> + +Description +----------- + +LM95233 and LM95234 are 11-bit digital temperature sensors with a 2-wire +System Management Bus (SMBus) interface and TrueTherm technology +that can very accurately monitor the temperature of two (LM95233) +or four (LM95234) remote diodes as well as its own temperature. +The remote diodes can be external devices such as microprocessors, +graphics processors or diode-connected 2N3904s. The chip's TruTherm +beta compensation technology allows sensing of 90 nm or 65 nm process +thermal diodes accurately. + +All temperature values are given in millidegrees Celsius. Temperature +is provided within a range of -127 to +255 degrees (+127.875 degrees for +the internal sensor). Resolution depends on temperature input and range. + +Each sensor has its own maximum limit, but the hysteresis is common to all +channels. The hysteresis is configurable with the tem1_max_hyst attribute and +affects the hysteresis on all channels. The first two external sensors also +have a critical limit. + +The lm95234 driver can change its update interval to a fixed set of values. +It will round up to the next selectable interval. See the datasheet for exact +values. Reading sensor values more often will do no harm, but will return +'old' values. |