1.. SPDX-License-Identifier: GPL-2.0 2 3Kernel driver tmp464 4==================== 5 6Supported chips: 7 8 * Texas Instruments TMP464 9 10 Prefix: 'tmp464' 11 12 Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b 13 14 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp464.html 15 16 * Texas Instruments TMP468 17 18 Prefix: 'tmp468' 19 20 Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b 21 22 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp468.html 23 24Authors: 25 26 Agathe Porte <agathe.porte@nokia.com> 27 Guenter Roeck <linux@roeck-us.net> 28 29Description 30----------- 31 32This driver implements support for Texas Instruments TMP464 and TMP468 33temperature sensor chips. TMP464 provides one local and four remote 34sensors. TMP468 provides one local and eight remote sensors. 35Temperature is measured in degrees Celsius. The chips are wired over 36I2C/SMBus and specified over a temperature range of -40 to +125 degrees 37Celsius. Resolution for both the local and remote channels is 0.0625 38degree C. 39 40The chips support only temperature measurements. The driver exports 41temperature values, limits, and alarms via the following sysfs files: 42 43**temp[1-9]_input** 44 45**temp[1-9]_max** 46 47**temp[1-9]_max_hyst** 48 49**temp[1-9]_max_alarm** 50 51**temp[1-9]_crit** 52 53**temp[1-9]_crit_alarm** 54 55**temp[1-9]_crit_hyst** 56 57**temp[2-9]_offset** 58 59**temp[2-9]_fault** 60 61Each sensor can be individually disabled via Devicetree or from sysfs 62via: 63 64**temp[1-9]_enable** 65 66If labels were specified in Devicetree, additional sysfs files will 67be present: 68 69**temp[1-9]_label** 70 71The update interval is configurable with the following sysfs attribute. 72 73**update_interval** 74