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| author |   Christian Lamparter <chunkeey@gmail.com> | 2022-02-18 10:06:43 +0100 |
|---|---|---|
| committer |   Guenter Roeck <linux@roeck-us.net> | 2022-02-27 17:03:19 -0800 |
| commit | cd929672a9ef644aca12de59a75de5f061d5983d (patch) | |
| tree | 1a6fc95a69ac7054e7e17f099603938c9e0cd2ea /Documentation/hwmon/lm70.rst | |
| parent | dt-bindings: Add ti,tmp125 temperature sensor binding (diff) | |
| download | linux-dev-cd929672a9ef644aca12de59a75de5f061d5983d.tar.xz linux-dev-cd929672a9ef644aca12de59a75de5f061d5983d.zip | |
hwmon: (lm70) Add ti,tmp125 support
The TMP125 is a 2 degree Celsius accurate Digital
Temperature Sensor with a SPI interface.
The temperature register is a 16-bit, read-only register.
The MSB (Bit 15) is a leading zero and never set. Bits 14
to 5 are the 1+9 temperature data bits in a two's
complement format. Bits 4 to 0 are useless copies of
Bit 5 value and therefore ignored.
This was tested on a Aerohive HiveAP-350.
Bonus: lm70 supports TMP122/TMP124 as well.
I added them to the Kconfig module description.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Link: https://lore.kernel.org/r/43b19cbd4e7f51e9509e561b02b5d8d0e7079fac.1645175187.git.chunkeey@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to '')
| -rw-r--r-- | Documentation/hwmon/lm70.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm70.rst b/Documentation/hwmon/lm70.rst index 6ddc5b67ccb5..11303a7e16a8 100644 --- a/Documentation/hwmon/lm70.rst +++ b/Documentation/hwmon/lm70.rst @@ -15,6 +15,10 @@ Supported chips: Information: https://www.ti.com/product/tmp122 + * Texas Instruments TMP125 + + Information: https://www.ti.com/product/tmp125 + * National Semiconductor LM71 Datasheet: https://www.ti.com/product/LM71 @@ -53,6 +57,9 @@ The LM74 and TMP121/TMP122/TMP123/TMP124 are very similar; main difference is The TMP122/TMP124 also feature configurable temperature thresholds. +The TMP125 is less accurate and provides 10-bit temperature data +with 0.25 degrees Celsius resolution. + The LM71 is also very similar; main difference is 14-bit temperature data (0.03125 degrees celsius resolution). |