1Kernel driver jc42 2================== 3 4Supported chips: 5 * Analog Devices ADT7408 6 Prefix: 'adt7408' 7 Addresses scanned: I2C 0x18 - 0x1f 8 Datasheets: 9 http://www.analog.com/static/imported-files/data_sheets/ADT7408.pdf 10 * IDT TSE2002B3, TS3000B3 11 Prefix: 'tse2002b3', 'ts3000b3' 12 Addresses scanned: I2C 0x18 - 0x1f 13 Datasheets: 14 http://www.idt.com/products/getdoc.cfm?docid=18715691 15 http://www.idt.com/products/getdoc.cfm?docid=18715692 16 * Maxim MAX6604 17 Prefix: 'max6604' 18 Addresses scanned: I2C 0x18 - 0x1f 19 Datasheets: 20 http://datasheets.maxim-ic.com/en/ds/MAX6604.pdf 21 * Microchip MCP9805, MCP98242, MCP98243, MCP9843 22 Prefixes: 'mcp9805', 'mcp98242', 'mcp98243', 'mcp9843' 23 Addresses scanned: I2C 0x18 - 0x1f 24 Datasheets: 25 http://ww1.microchip.com/downloads/en/DeviceDoc/21977b.pdf 26 http://ww1.microchip.com/downloads/en/DeviceDoc/21996a.pdf 27 http://ww1.microchip.com/downloads/en/DeviceDoc/22153c.pdf 28 * NXP Semiconductors SE97, SE97B 29 Prefix: 'se97' 30 Addresses scanned: I2C 0x18 - 0x1f 31 Datasheets: 32 http://www.nxp.com/documents/data_sheet/SE97.pdf 33 http://www.nxp.com/documents/data_sheet/SE97B.pdf 34 * NXP Semiconductors SE98 35 Prefix: 'se98' 36 Addresses scanned: I2C 0x18 - 0x1f 37 Datasheets: 38 http://www.nxp.com/documents/data_sheet/SE98.pdf 39 * ON Semiconductor CAT34TS02, CAT6095 40 Prefix: 'cat34ts02', 'cat6095' 41 Addresses scanned: I2C 0x18 - 0x1f 42 Datasheet: 43 http://www.onsemi.com/pub_link/Collateral/CAT34TS02-D.PDF 44 http://www.onsemi.com/pub/Collateral/CAT6095-D.PDF 45 * ST Microelectronics STTS424, STTS424E02 46 Prefix: 'stts424' 47 Addresses scanned: I2C 0x18 - 0x1f 48 Datasheets: 49 http://www.st.com/stonline/products/literature/ds/13447/stts424.pdf 50 http://www.st.com/stonline/products/literature/ds/13448/stts424e02.pdf 51 * JEDEC JC 42.4 compliant temperature sensor chips 52 Prefix: 'jc42' 53 Addresses scanned: I2C 0x18 - 0x1f 54 Datasheet: - 55 56Author: 57 Guenter Roeck <guenter.roeck@ericsson.com> 58 59 60Description 61----------- 62 63This driver implements support for JEDEC JC 42.4 compliant temperature sensors. 64The driver auto-detects the chips listed above, but can be manually instantiated 65to support other JC 42.4 compliant chips. 66 67Example: the following will load the driver for a generic JC 42.4 compliant 68temperature sensor at address 0x18 on I2C bus #1: 69 70# modprobe jc42 71# echo jc42 0x18 > /sys/bus/i2c/devices/i2c-1/new_device 72 73A JC 42.4 compliant chip supports a single temperature sensor. Minimum, maximum, 74and critical temperature can be configured. There are alarms for high, low, 75and critical thresholds. 76 77There is also an hysteresis to control the thresholds for resetting alarms. 78Per JC 42.4 specification, the hysteresis threshold can be configured to 0, 1.5, 793.0, and 6.0 degrees C. Configured hysteresis values will be rounded to those 80limits. The chip supports only a single register to configure the hysteresis, 81which applies to all limits. This register can be written by writing into 82temp1_crit_hyst. Other hysteresis attributes are read-only. 83 84Sysfs entries 85------------- 86 87temp1_input Temperature (RO) 88temp1_min Minimum temperature (RW) 89temp1_max Maximum temperature (RW) 90temp1_crit Critical high temperature (RW) 91 92temp1_crit_hyst Critical hysteresis temperature (RW) 93temp1_max_hyst Maximum hysteresis temperature (RO) 94 95temp1_min_alarm Temperature low alarm 96temp1_max_alarm Temperature high alarm 97temp1_crit_alarm Temperature critical alarm 98