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Diffstat (limited to 'Documentation/hwmon/jc42')
| -rw-r--r-- | Documentation/hwmon/jc42 | 73 |
1 files changed, 40 insertions, 33 deletions
diff --git a/Documentation/hwmon/jc42 b/Documentation/hwmon/jc42 index 0e76ef12e4c..f3893f7440d 100644 --- a/Documentation/hwmon/jc42 +++ b/Documentation/hwmon/jc42 @@ -3,64 +3,67 @@ Kernel driver jc42 Supported chips: * Analog Devices ADT7408 - Prefix: 'adt7408' - Addresses scanned: I2C 0x18 - 0x1f Datasheets: http://www.analog.com/static/imported-files/data_sheets/ADT7408.pdf - * IDT TSE2002B3, TS3000B3 - Prefix: 'tse2002b3', 'ts3000b3' - Addresses scanned: I2C 0x18 - 0x1f + * Atmel AT30TS00, AT30TS002A/B, AT30TSE004A Datasheets: - http://www.idt.com/products/getdoc.cfm?docid=18715691 - http://www.idt.com/products/getdoc.cfm?docid=18715692 + http://www.atmel.com/Images/doc8585.pdf + http://www.atmel.com/Images/doc8711.pdf + http://www.atmel.com/Images/Atmel-8852-SEEPROM-AT30TSE002A-Datasheet.pdf + http://www.atmel.com/Images/Atmel-8868-DTS-AT30TSE004A-Datasheet.pdf + * IDT TSE2002B3, TSE2002GB2, TS3000B3, TS3000GB2 + Datasheets: + http://www.idt.com/sites/default/files/documents/IDT_TSE2002B3C_DST_20100512_120303152056.pdf + http://www.idt.com/sites/default/files/documents/IDT_TSE2002GB2A1_DST_20111107_120303145914.pdf + http://www.idt.com/sites/default/files/documents/IDT_TS3000B3A_DST_20101129_120303152013.pdf + http://www.idt.com/sites/default/files/documents/IDT_TS3000GB2A1_DST_20111104_120303151012.pdf * Maxim MAX6604 - Prefix: 'max6604' - Addresses scanned: I2C 0x18 - 0x1f Datasheets: http://datasheets.maxim-ic.com/en/ds/MAX6604.pdf - * Microchip MCP9805, MCP98242, MCP98243, MCP9843 - Prefixes: 'mcp9805', 'mcp98242', 'mcp98243', 'mcp9843' - Addresses scanned: I2C 0x18 - 0x1f + * Microchip MCP9804, MCP9805, MCP98242, MCP98243, MCP98244, MCP9843 Datasheets: + http://ww1.microchip.com/downloads/en/DeviceDoc/22203C.pdf http://ww1.microchip.com/downloads/en/DeviceDoc/21977b.pdf http://ww1.microchip.com/downloads/en/DeviceDoc/21996a.pdf http://ww1.microchip.com/downloads/en/DeviceDoc/22153c.pdf - * NXP Semiconductors SE97, SE97B - Prefix: 'se97' - Addresses scanned: I2C 0x18 - 0x1f + http://ww1.microchip.com/downloads/en/DeviceDoc/22327A.pdf + * NXP Semiconductors SE97, SE97B, SE98, SE98A Datasheets: http://www.nxp.com/documents/data_sheet/SE97.pdf http://www.nxp.com/documents/data_sheet/SE97B.pdf - * NXP Semiconductors SE98 - Prefix: 'se98' - Addresses scanned: I2C 0x18 - 0x1f - Datasheets: http://www.nxp.com/documents/data_sheet/SE98.pdf + http://www.nxp.com/documents/data_sheet/SE98A.pdf * ON Semiconductor CAT34TS02, CAT6095 - Prefix: 'cat34ts02', 'cat6095' - Addresses scanned: I2C 0x18 - 0x1f Datasheet: http://www.onsemi.com/pub_link/Collateral/CAT34TS02-D.PDF http://www.onsemi.com/pub/Collateral/CAT6095-D.PDF - * ST Microelectronics STTS424, STTS424E02 - Prefix: 'stts424' - Addresses scanned: I2C 0x18 - 0x1f + * ST Microelectronics STTS424, STTS424E02, STTS2002, STTS2004, STTS3000 Datasheets: - http://www.st.com/stonline/products/literature/ds/13447/stts424.pdf - http://www.st.com/stonline/products/literature/ds/13448/stts424e02.pdf + http://www.st.com/web/en/resource/technical/document/datasheet/CD00157556.pdf + http://www.st.com/web/en/resource/technical/document/datasheet/CD00157558.pdf + http://www.st.com/web/en/resource/technical/document/datasheet/CD00266638.pdf + http://www.st.com/web/en/resource/technical/document/datasheet/CD00225278.pdf + http://www.st.com/web/en/resource/technical/document/datasheet/DM00076709.pdf * JEDEC JC 42.4 compliant temperature sensor chips + Datasheet: + http://www.jedec.org/sites/default/files/docs/4_01_04R19.pdf + + Common for all chips: Prefix: 'jc42' Addresses scanned: I2C 0x18 - 0x1f - Datasheet: - Author: - Guenter Roeck <guenter.roeck@ericsson.com> + Guenter Roeck <linux@roeck-us.net> Description ----------- -This driver implements support for JEDEC JC 42.4 compliant temperature sensors. +This driver implements support for JEDEC JC 42.4 compliant temperature sensors, +which are used on many DDR3 memory modules for mobile devices and servers. Some +systems use the sensor to prevent memory overheating by automatically throttling +the memory controller. + The driver auto-detects the chips listed above, but can be manually instantiated to support other JC 42.4 compliant chips. @@ -81,15 +84,19 @@ limits. The chip supports only a single register to configure the hysteresis, which applies to all limits. This register can be written by writing into temp1_crit_hyst. Other hysteresis attributes are read-only. +If the BIOS has configured the sensor for automatic temperature management, it +is likely that it has locked the registers, i.e., that the temperature limits +cannot be changed. + Sysfs entries ------------- temp1_input Temperature (RO) -temp1_min Minimum temperature (RW) -temp1_max Maximum temperature (RW) -temp1_crit Critical high temperature (RW) +temp1_min Minimum temperature (RO or RW) +temp1_max Maximum temperature (RO or RW) +temp1_crit Critical high temperature (RO or RW) -temp1_crit_hyst Critical hysteresis temperature (RW) +temp1_crit_hyst Critical hysteresis temperature (RO or RW) temp1_max_hyst Maximum hysteresis temperature (RO) temp1_min_alarm Temperature low alarm |