0001 .. SPDX-License-Identifier: GPL-2.0
0002
0003 Kernel driver tmp464
0004 ====================
0005
0006 Supported chips:
0007
0008 * Texas Instruments TMP464
0009
0010 Prefix: 'tmp464'
0011
0012 Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b
0013
0014 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp464.html
0015
0016 * Texas Instruments TMP468
0017
0018 Prefix: 'tmp468'
0019
0020 Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b
0021
0022 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp468.html
0023
0024 Authors:
0025
0026 Agathe Porte <agathe.porte@nokia.com>
0027 Guenter Roeck <linux@roeck-us.net>
0028
0029 Description
0030 -----------
0031
0032 This driver implements support for Texas Instruments TMP464 and TMP468
0033 temperature sensor chips. TMP464 provides one local and four remote
0034 sensors. TMP468 provides one local and eight remote sensors.
0035 Temperature is measured in degrees Celsius. The chips are wired over
0036 I2C/SMBus and specified over a temperature range of -40 to +125 degrees
0037 Celsius. Resolution for both the local and remote channels is 0.0625
0038 degree C.
0039
0040 The chips support only temperature measurements. The driver exports
0041 temperature values, limits, and alarms via the following sysfs files:
0042
0043 **temp[1-9]_input**
0044
0045 **temp[1-9]_max**
0046
0047 **temp[1-9]_max_hyst**
0048
0049 **temp[1-9]_max_alarm**
0050
0051 **temp[1-9]_crit**
0052
0053 **temp[1-9]_crit_alarm**
0054
0055 **temp[1-9]_crit_hyst**
0056
0057 **temp[2-9]_offset**
0058
0059 **temp[2-9]_fault**
0060
0061 Each sensor can be individually disabled via Devicetree or from sysfs
0062 via:
0063
0064 **temp[1-9]_enable**
0065
0066 If labels were specified in Devicetree, additional sysfs files will
0067 be present:
0068
0069 **temp[1-9]_label**
0070
0071 The update interval is configurable with the following sysfs attribute.
0072
0073 **update_interval**
