projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 983b97be HK |
1 | Kernel driver adt7410 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| b04f2f7d | 5 | |
| 983b97be | 6 | * Analog Devices ADT7410 |
| b04f2f7d | 7 | |
| 983b97be | 8 | Prefix: 'adt7410' |
| b04f2f7d | 9 | |
| ab302bb0 | 10 | Addresses scanned: None |
| b04f2f7d | 11 | |
| 983b97be | 12 | Datasheet: Publicly available at the Analog Devices website |
| b04f2f7d | 13 | |
| ad736c1a | 14 | https://www.analog.com/static/imported-files/data_sheets/ADT7410.pdf |
| ab302bb0 | 15 | * Analog Devices ADT7420 |
| b04f2f7d | 16 | |
| ab302bb0 | 17 | Prefix: 'adt7420' |
| b04f2f7d | 18 | |
| ab302bb0 | 19 | Addresses scanned: None |
| b04f2f7d | 20 | |
| ab302bb0 | 21 | Datasheet: Publicly available at the Analog Devices website |
| b04f2f7d | 22 | |
| ad736c1a | 23 | https://www.analog.com/static/imported-files/data_sheets/ADT7420.pdf |
| b04f2f7d | 24 | |
| 51c2a487 | 25 | * Analog Devices ADT7310 |
| b04f2f7d | 26 | |
| 51c2a487 | 27 | Prefix: 'adt7310' |
| b04f2f7d | 28 | |
| 51c2a487 | 29 | Addresses scanned: None |
| b04f2f7d | 30 | |
| 51c2a487 | 31 | Datasheet: Publicly available at the Analog Devices website |
| b04f2f7d | 32 | |
| ad736c1a | 33 | https://www.analog.com/static/imported-files/data_sheets/ADT7310.pdf |
| b04f2f7d | 34 | |
| 51c2a487 | 35 | * Analog Devices ADT7320 |
| b04f2f7d | 36 | |
| 51c2a487 | 37 | Prefix: 'adt7320' |
| b04f2f7d | 38 | |
| 51c2a487 | 39 | Addresses scanned: None |
| b04f2f7d | 40 | |
| 51c2a487 | 41 | Datasheet: Publicly available at the Analog Devices website |
| b04f2f7d | 42 | |
| ad736c1a | 43 | https://www.analog.com/static/imported-files/data_sheets/ADT7320.pdf |
| 983b97be HK |
44 | |
| 45 | Author: Hartmut Knaack <knaack.h@gmx.de> | |
| 46 | ||
| 47 | Description | |
| 48 | ----------- | |
| 49 | ||
| 51c2a487 LPC |
50 | The ADT7310/ADT7410 is a temperature sensor with rated temperature range of |
| 51 | -55°C to +150°C. It has a high accuracy of +/-0.5°C and can be operated at a | |
| 52 | resolution of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an | |
| 53 | INT pin to indicate that a minimum or maximum temperature set point has been | |
| 54 | exceeded, as well as a critical temperature (CT) pin to indicate that the | |
| 55 | critical temperature set point has been exceeded. Both pins can be set up with a | |
| 56 | common hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events. | |
| 57 | Both pins can individually set to be active-low or active-high, while the whole | |
| 58 | device can either run in comparator mode or interrupt mode. The ADT7410 supports | |
| 59 | continuous temperature sampling, as well as sampling one temperature value per | |
| 60 | second or even just get one sample on demand for power saving. Besides, it can | |
| 61 | completely power down its ADC, if power management is required. | |
| 62 | ||
| 63 | The ADT7320/ADT7420 is register compatible, the only differences being the | |
| 64 | package, a slightly narrower operating temperature range (-40°C to +150°C), and | |
| 65 | a better accuracy (0.25°C instead of 0.50°C.) | |
| 66 | ||
| 67 | The difference between the ADT7310/ADT7320 and ADT7410/ADT7420 is the control | |
| 68 | interface, the ADT7310 and ADT7320 use SPI while the ADT7410 and ADT7420 use | |
| 69 | I2C. | |
| ab302bb0 | 70 | |
| 983b97be HK |
71 | Configuration Notes |
| 72 | ------------------- | |
| 73 | ||
| 74 | Since the device uses one hysteresis value, which is an offset to minimum, | |
| 75 | maximum and critical temperature, it can only be set for temp#_max_hyst. | |
| 76 | However, temp#_min_hyst and temp#_crit_hyst show their corresponding | |
| 77 | hysteresis. | |
| 78 | The device is set to 16 bit resolution and comparator mode. | |
| 79 | ||
| 80 | sysfs-Interface | |
| 81 | --------------- | |
| 82 | ||
| b04f2f7d MCC |
83 | ======================== ==================================================== |
| 84 | temp#_input temperature input | |
| 85 | temp#_min temperature minimum setpoint | |
| 86 | temp#_max temperature maximum setpoint | |
| 87 | temp#_crit critical temperature setpoint | |
| 88 | temp#_min_hyst hysteresis for temperature minimum (read-only) | |
| 89 | temp#_max_hyst hysteresis for temperature maximum (read/write) | |
| 90 | temp#_crit_hyst hysteresis for critical temperature (read-only) | |
| 91 | temp#_min_alarm temperature minimum alarm flag | |
| 92 | temp#_max_alarm temperature maximum alarm flag | |
| 93 | temp#_crit_alarm critical temperature alarm flag | |
| 94 | ======================== ==================================================== |