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Linux/Documentation/hwmon/ltc2990.rst

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Diff markup

Differences between /Documentation/hwmon/ltc2990.rst (Version linux-6.12-rc7) and /Documentation/hwmon/ltc2990.rst (Version linux-6.6.60)


  1 Kernel driver ltc2990                               1 Kernel driver ltc2990
  2 =====================                               2 =====================
  3                                                     3 
  4                                                     4 
  5 Supported chips:                                    5 Supported chips:
  6                                                     6 
  7   * Linear Technology LTC2990                       7   * Linear Technology LTC2990
  8                                                     8 
  9     Prefix: 'ltc2990'                               9     Prefix: 'ltc2990'
 10                                                    10 
 11     Addresses scanned: -                           11     Addresses scanned: -
 12                                                    12 
 13     Datasheet: http://www.linear.com/product/l     13     Datasheet: http://www.linear.com/product/ltc2990
 14                                                    14 
 15                                                    15 
 16                                                    16 
 17 Author:                                            17 Author:
 18                                                    18 
 19         - Mike Looijmans <mike.looijmans@topic.     19         - Mike Looijmans <mike.looijmans@topic.nl>
 20         - Tom Levens <tom.levens@cern.ch>           20         - Tom Levens <tom.levens@cern.ch>
 21                                                    21 
 22                                                    22 
 23 Description                                        23 Description
 24 -----------                                        24 -----------
 25                                                    25 
 26 LTC2990 is a Quad I2C Voltage, Current and Tem     26 LTC2990 is a Quad I2C Voltage, Current and Temperature Monitor.
 27 The chip's inputs can measure 4 voltages, or t     27 The chip's inputs can measure 4 voltages, or two inputs together (1+2 and 3+4)
 28 can be combined to measure a differential volt     28 can be combined to measure a differential voltage, which is typically used to
 29 measure current through a series resistor, or      29 measure current through a series resistor, or a temperature with an external
 30 diode.                                             30 diode.
 31                                                    31 
 32                                                    32 
 33 Usage Notes                                        33 Usage Notes
 34 -----------                                        34 -----------
 35                                                    35 
 36 This driver does not probe for PMBus devices.      36 This driver does not probe for PMBus devices. You will have to instantiate
 37 devices explicitly.                                37 devices explicitly.
 38                                                    38 
 39                                                    39 
 40 Sysfs attributes                                   40 Sysfs attributes
 41 ----------------                                   41 ----------------
 42                                                    42 
 43 ============= ================================     43 ============= ==================================================
 44 in0_input     Voltage at Vcc pin in millivolt      44 in0_input     Voltage at Vcc pin in millivolt (range 2.5V to 5V)
 45 temp1_input   Internal chip temperature in mil     45 temp1_input   Internal chip temperature in millidegrees Celsius
 46 ============= ================================     46 ============= ==================================================
 47                                                    47 
 48 A subset of the following attributes are visib     48 A subset of the following attributes are visible, depending on the measurement
 49 mode of the chip.                                  49 mode of the chip.
 50                                                    50 
 51 ============= ================================     51 ============= ==========================================================
 52 in[1-4]_input Voltage at V[1-4] pin in millivo     52 in[1-4]_input Voltage at V[1-4] pin in millivolt
 53 temp2_input   External temperature sensor TR1      53 temp2_input   External temperature sensor TR1 in millidegrees Celsius
 54 temp3_input   External temperature sensor TR2      54 temp3_input   External temperature sensor TR2 in millidegrees Celsius
 55 curr1_input   Current in mA across V1-V2 assum     55 curr1_input   Current in mA across V1-V2 assuming a 1mOhm sense resistor
 56 curr2_input   Current in mA across V3-V4 assum     56 curr2_input   Current in mA across V3-V4 assuming a 1mOhm sense resistor
 57 ============= ================================     57 ============= ==========================================================
 58                                                    58 
 59 The "curr*_input" measurements actually report     59 The "curr*_input" measurements actually report the voltage drop across the
 60 input pins in microvolts. This is equivalent t     60 input pins in microvolts. This is equivalent to the current through a 1mOhm
 61 sense resistor. Divide the reported value by t     61 sense resistor. Divide the reported value by the actual sense resistor value
 62 in mOhm to get the actual value.                   62 in mOhm to get the actual value.
                                                      

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