From 007e433cf0373334a2bef1b0c9831647184906ba Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 22 Feb 2022 14:36:10 -0800 Subject: hwmon: Add driver for Texas Instruments TMP464 and TMP468 Add support for Texas Instruments TMP464 and TMP468 temperature sensor ICs. TI's TMP464 is an I2C temperature sensor chip. This chip is similar to TI's TMP421 chip, but with 16bit-wide registers (instead of 8bit-wide registers). The chip has one local sensor and four remote sensors. TMP468 is similar to TMP464 but has one local and eight remote sensors. Originally-from: Agathe Porte Cc: Agathe Porte Cc: Krzysztof Adamski Tested-by: Agathe Porte Link: https://lore.kernel.org/r/20220222223610.23098-2-linux@roeck-us.net Signed-off-by: Guenter Roeck --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/tmp464.rst | 73 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 74 insertions(+) create mode 100644 Documentation/hwmon/tmp464.rst (limited to 'Documentation/hwmon') diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 075d1defcd20..9d2787a12a69 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -195,6 +195,7 @@ Hardware Monitoring Kernel Drivers tmp108 tmp401 tmp421 + tmp464 tmp513 tps23861 tps40422 diff --git a/Documentation/hwmon/tmp464.rst b/Documentation/hwmon/tmp464.rst new file mode 100644 index 000000000000..7596e7623d06 --- /dev/null +++ b/Documentation/hwmon/tmp464.rst @@ -0,0 +1,73 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver tmp464 +==================== + +Supported chips: + + * Texas Instruments TMP464 + + Prefix: 'tmp464' + + Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b + + Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp464.html + + * Texas Instruments TMP468 + + Prefix: 'tmp468' + + Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b + + Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp468.html + +Authors: + + Agathe Porte + Guenter Roeck + +Description +----------- + +This driver implements support for Texas Instruments TMP464 and TMP468 +temperature sensor chips. TMP464 provides one local and four remote +sensors. TMP468 provides one local and eight remote sensors. +Temperature is measured in degrees Celsius. The chips are wired over +I2C/SMBus and specified over a temperature range of -40 to +125 degrees +Celsius. Resolution for both the local and remote channels is 0.0625 +degree C. + +The chips support only temperature measurements. The driver exports +temperature values, limits, and alarms via the following sysfs files: + +**temp[1-9]_input** + +**temp[1-9]_max** + +**temp[1-9]_max_hyst** + +**temp[1-9]_max_alarm** + +**temp[1-9]_crit** + +**temp[1-9]_crit_alarm** + +**temp[1-9]_crit_hyst** + +**temp[2-9]_offset** + +**temp[2-9]_fault** + +Each sensor can be individually disabled via Devicetree or from sysfs +via: + +**temp[1-9]_enable** + +If labels were specified in Devicetree, additional sysfs files will +be present: + +**temp[1-9]_label** + +The update interval is configurable with the following sysfs attribute. + +**update_interval** -- cgit v1.2.3