0001 Kernel driver adt7410
0002 =====================
0003
0004 Supported chips:
0005
0006 * Analog Devices ADT7410
0007
0008 Prefix: 'adt7410'
0009
0010 Addresses scanned: None
0011
0012 Datasheet: Publicly available at the Analog Devices website
0013
0014 https://www.analog.com/static/imported-files/data_sheets/ADT7410.pdf
0015 * Analog Devices ADT7420
0016
0017 Prefix: 'adt7420'
0018
0019 Addresses scanned: None
0020
0021 Datasheet: Publicly available at the Analog Devices website
0022
0023 https://www.analog.com/static/imported-files/data_sheets/ADT7420.pdf
0024
0025 * Analog Devices ADT7310
0026
0027 Prefix: 'adt7310'
0028
0029 Addresses scanned: None
0030
0031 Datasheet: Publicly available at the Analog Devices website
0032
0033 https://www.analog.com/static/imported-files/data_sheets/ADT7310.pdf
0034
0035 * Analog Devices ADT7320
0036
0037 Prefix: 'adt7320'
0038
0039 Addresses scanned: None
0040
0041 Datasheet: Publicly available at the Analog Devices website
0042
0043 https://www.analog.com/static/imported-files/data_sheets/ADT7320.pdf
0044
0045 Author: Hartmut Knaack <knaack.h@gmx.de>
0046
0047 Description
0048 -----------
0049
0050 The ADT7310/ADT7410 is a temperature sensor with rated temperature range of
0051 -55°C to +150°C. It has a high accuracy of +/-0.5°C and can be operated at a
0052 resolution of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an
0053 INT pin to indicate that a minimum or maximum temperature set point has been
0054 exceeded, as well as a critical temperature (CT) pin to indicate that the
0055 critical temperature set point has been exceeded. Both pins can be set up with a
0056 common hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events.
0057 Both pins can individually set to be active-low or active-high, while the whole
0058 device can either run in comparator mode or interrupt mode. The ADT7410 supports
0059 continuous temperature sampling, as well as sampling one temperature value per
0060 second or even just get one sample on demand for power saving. Besides, it can
0061 completely power down its ADC, if power management is required.
0062
0063 The ADT7320/ADT7420 is register compatible, the only differences being the
0064 package, a slightly narrower operating temperature range (-40°C to +150°C), and
0065 a better accuracy (0.25°C instead of 0.50°C.)
0066
0067 The difference between the ADT7310/ADT7320 and ADT7410/ADT7420 is the control
0068 interface, the ADT7310 and ADT7320 use SPI while the ADT7410 and ADT7420 use
0069 I2C.
0070
0071 Configuration Notes
0072 -------------------
0073
0074 Since the device uses one hysteresis value, which is an offset to minimum,
0075 maximum and critical temperature, it can only be set for temp#_max_hyst.
0076 However, temp#_min_hyst and temp#_crit_hyst show their corresponding
0077 hysteresis.
0078 The device is set to 16 bit resolution and comparator mode.
0079
0080 sysfs-Interface
0081 ---------------
0082
0083 ======================== ====================================================
0084 temp#_input temperature input
0085 temp#_min temperature minimum setpoint
0086 temp#_max temperature maximum setpoint
0087 temp#_crit critical temperature setpoint
0088 temp#_min_hyst hysteresis for temperature minimum (read-only)
0089 temp#_max_hyst hysteresis for temperature maximum (read/write)
0090 temp#_crit_hyst hysteresis for critical temperature (read-only)
0091 temp#_min_alarm temperature minimum alarm flag
0092 temp#_max_alarm temperature maximum alarm flag
0093 temp#_crit_alarm critical temperature alarm flag
0094 ======================== ====================================================
