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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /Documentation/hwmon/lm95245 | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | Documentation/hwmon/lm95245 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm95245 b/Documentation/hwmon/lm95245 new file mode 100644 index 000000000..d755901f5 --- /dev/null +++ b/Documentation/hwmon/lm95245 @@ -0,0 +1,41 @@ +Kernel driver lm95245 +================== + +Supported chips: + * TI LM95235 + Addresses scanned: I2C 0x18, 0x29, 0x4c + Datasheet: Publicly available at the TI website + http://www.ti.com/lit/ds/symlink/lm95235.pdf + * TI / National Semiconductor LM95245 + Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d + Datasheet: Publicly available at the TI website + http://www.ti.com/lit/ds/symlink/lm95245.pdf + + +Author: Alexander Stein <alexander.stein@systec-electronic.com> + +Description +----------- + +LM95235 and LM95245 are 11-bit digital temperature sensors with a 2-wire System +Management Bus (SMBus) interface and TruTherm technology that can monitor +the temperature of a remote diode as well as its own temperature. +The chips can be used to very accurately monitor the temperature of +external devices such as microprocessors. + +All temperature values are given in millidegrees Celsius. Local temperature +is given within a range of -127 to +127.875 degrees. Remote temperatures are +given within a range of -127 to +255 degrees. Resolution depends on +temperature input and range. + +Each sensor has its own critical limit. Additionally, there is a relative +hysteresis value common to both critical limits. To make life easier to +user-space applications, two absolute values are exported, one for each +channel, but these values are of course linked. Only the local hysteresis +can be set from user-space, and the same delta applies to the remote +hysteresis. + +The lm95245 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. |