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authorChristian Lamparter2022-02-18 10:06:43 +0100
committerGuenter Roeck2022-02-27 17:03:19 -0800
commitcd929672a9ef644aca12de59a75de5f061d5983d (patch)
tree1a6fc95a69ac7054e7e17f099603938c9e0cd2ea /Documentation/hwmon
parent64b631fb0c6f7e5fbbe0d641556e07e7a8a272ef (diff)
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 'Documentation/hwmon')
-rw-r--r--Documentation/hwmon/lm70.rst7
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).