^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) Kernel driver jc42
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) ==================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) Supported chips:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Analog Devices ADT7408
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) Datasheets:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) https://www.analog.com/static/imported-files/data_sheets/ADT7408.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Atmel AT30TS00, AT30TS002A/B, AT30TSE004A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) Datasheets:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) http://www.atmel.com/Images/doc8585.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) http://www.atmel.com/Images/doc8711.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) http://www.atmel.com/Images/Atmel-8852-SEEPROM-AT30TSE002A-Datasheet.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) http://www.atmel.com/Images/Atmel-8868-DTS-AT30TSE004A-Datasheet.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * IDT TSE2002B3, TSE2002GB2, TSE2004GB2, TS3000B3, TS3000GB0, TS3000GB2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) TS3001GB2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) Datasheets:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) Available from IDT web site
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * Maxim MAX6604
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) Datasheets:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) http://datasheets.maxim-ic.com/en/ds/MAX6604.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Microchip MCP9804, MCP9805, MCP9808, MCP98242, MCP98243, MCP98244, MCP9843
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) Datasheets:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) https://ww1.microchip.com/downloads/en/DeviceDoc/22203C.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) https://ww1.microchip.com/downloads/en/DeviceDoc/21977b.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) https://ww1.microchip.com/downloads/en/DeviceDoc/25095A.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) https://ww1.microchip.com/downloads/en/DeviceDoc/21996a.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) https://ww1.microchip.com/downloads/en/DeviceDoc/22153c.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) https://ww1.microchip.com/downloads/en/DeviceDoc/22327A.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * NXP Semiconductors SE97, SE97B, SE98, SE98A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) Datasheets:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) https://www.nxp.com/documents/data_sheet/SE97.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) https://www.nxp.com/documents/data_sheet/SE97B.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) https://www.nxp.com/documents/data_sheet/SE98.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) https://www.nxp.com/documents/data_sheet/SE98A.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * ON Semiconductor CAT34TS02, CAT6095
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) https://www.onsemi.com/pub_link/Collateral/CAT34TS02-D.PDF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) https://www.onsemi.com/pub/Collateral/CAT6095-D.PDF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * ST Microelectronics STTS424, STTS424E02, STTS2002, STTS2004, STTS3000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) Datasheets:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) http://www.st.com/web/en/resource/technical/document/datasheet/CD00157556.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) http://www.st.com/web/en/resource/technical/document/datasheet/CD00157558.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) http://www.st.com/web/en/resource/technical/document/datasheet/CD00266638.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) http://www.st.com/web/en/resource/technical/document/datasheet/CD00225278.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) http://www.st.com/web/en/resource/technical/document/datasheet/DM00076709.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * JEDEC JC 42.4 compliant temperature sensor chips
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) http://www.jedec.org/sites/default/files/docs/4_01_04R19.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) Common for all chips:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) Prefix: 'jc42'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) Addresses scanned: I2C 0x18 - 0x1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) Author:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) Guenter Roeck <linux@roeck-us.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) Description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) -----------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) This driver implements support for JEDEC JC 42.4 compliant temperature sensors,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) which are used on many DDR3 memory modules for mobile devices and servers. Some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) systems use the sensor to prevent memory overheating by automatically throttling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) the memory controller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) The driver auto-detects the chips listed above, but can be manually instantiated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) to support other JC 42.4 compliant chips.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) Example: the following will load the driver for a generic JC 42.4 compliant
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) temperature sensor at address 0x18 on I2C bus #1::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) # modprobe jc42
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) # echo jc42 0x18 > /sys/bus/i2c/devices/i2c-1/new_device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) A JC 42.4 compliant chip supports a single temperature sensor. Minimum, maximum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) and critical temperature can be configured. There are alarms for high, low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) and critical thresholds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) There is also an hysteresis to control the thresholds for resetting alarms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) Per JC 42.4 specification, the hysteresis threshold can be configured to 0, 1.5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 3.0, and 6.0 degrees C. Configured hysteresis values will be rounded to those
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) limits. The chip supports only a single register to configure the hysteresis,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) which applies to all limits. This register can be written by writing into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) temp1_crit_hyst. Other hysteresis attributes are read-only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) If the BIOS has configured the sensor for automatic temperature management, it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) is likely that it has locked the registers, i.e., that the temperature limits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) cannot be changed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) Sysfs entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) -------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) ======================= ===========================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) temp1_input Temperature (RO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) temp1_min Minimum temperature (RO or RW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) temp1_max Maximum temperature (RO or RW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) temp1_crit Critical high temperature (RO or RW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) temp1_crit_hyst Critical hysteresis temperature (RO or RW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) temp1_max_hyst Maximum hysteresis temperature (RO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) temp1_min_alarm Temperature low alarm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) temp1_max_alarm Temperature high alarm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) temp1_crit_alarm Temperature critical alarm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) ======================= ===========================================
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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