projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / blame
| Commit | Line | Data |
|---|---|---|
| 983b97be HK |
1 | Kernel driver adt7410 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * Analog Devices ADT7410 | |
| 6 | Prefix: 'adt7410' | |
| ab302bb0 | 7 | Addresses scanned: None |
| 983b97be HK |
8 | Datasheet: Publicly available at the Analog Devices website |
| 9 | http://www.analog.com/static/imported-files/data_sheets/ADT7410.pdf | |
| ab302bb0 JD |
10 | * Analog Devices ADT7420 |
| 11 | Prefix: 'adt7420' | |
| 12 | Addresses scanned: None | |
| 13 | Datasheet: Publicly available at the Analog Devices website | |
| 14 | http://www.analog.com/static/imported-files/data_sheets/ADT7420.pdf | |
| 51c2a487 LPC |
15 | * Analog Devices ADT7310 |
| 16 | Prefix: 'adt7310' | |
| 17 | Addresses scanned: None | |
| 18 | Datasheet: Publicly available at the Analog Devices website | |
| 19 | http://www.analog.com/static/imported-files/data_sheets/ADT7310.pdf | |
| 20 | * Analog Devices ADT7320 | |
| 21 | Prefix: 'adt7320' | |
| 22 | Addresses scanned: None | |
| 23 | Datasheet: Publicly available at the Analog Devices website | |
| 24 | http://www.analog.com/static/imported-files/data_sheets/ADT7320.pdf | |
| 983b97be HK |
25 | |
| 26 | Author: Hartmut Knaack <knaack.h@gmx.de> | |
| 27 | ||
| 28 | Description | |
| 29 | ----------- | |
| 30 | ||
| 51c2a487 LPC |
31 | The ADT7310/ADT7410 is a temperature sensor with rated temperature range of |
| 32 | -55°C to +150°C. It has a high accuracy of +/-0.5°C and can be operated at a | |
| 33 | resolution of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an | |
| 34 | INT pin to indicate that a minimum or maximum temperature set point has been | |
| 35 | exceeded, as well as a critical temperature (CT) pin to indicate that the | |
| 36 | critical temperature set point has been exceeded. Both pins can be set up with a | |
| 37 | common hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events. | |
| 38 | Both pins can individually set to be active-low or active-high, while the whole | |
| 39 | device can either run in comparator mode or interrupt mode. The ADT7410 supports | |
| 40 | continuous temperature sampling, as well as sampling one temperature value per | |
| 41 | second or even just get one sample on demand for power saving. Besides, it can | |
| 42 | completely power down its ADC, if power management is required. | |
| 43 | ||
| 44 | The ADT7320/ADT7420 is register compatible, the only differences being the | |
| 45 | package, a slightly narrower operating temperature range (-40°C to +150°C), and | |
| 46 | a better accuracy (0.25°C instead of 0.50°C.) | |
| 47 | ||
| 48 | The difference between the ADT7310/ADT7320 and ADT7410/ADT7420 is the control | |
| 49 | interface, the ADT7310 and ADT7320 use SPI while the ADT7410 and ADT7420 use | |
| 50 | I2C. | |
| ab302bb0 | 51 | |
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52 | Configuration Notes |
| 53 | ------------------- | |
| 54 | ||
| 55 | Since the device uses one hysteresis value, which is an offset to minimum, | |
| 56 | maximum and critical temperature, it can only be set for temp#_max_hyst. | |
| 57 | However, temp#_min_hyst and temp#_crit_hyst show their corresponding | |
| 58 | hysteresis. | |
| 59 | The device is set to 16 bit resolution and comparator mode. | |
| 60 | ||
| 61 | sysfs-Interface | |
| 62 | --------------- | |
| 63 | ||
| 64 | temp#_input - temperature input | |
| 65 | temp#_min - temperature minimum setpoint | |
| 66 | temp#_max - temperature maximum setpoint | |
| 67 | temp#_crit - critical temperature setpoint | |
| 68 | temp#_min_hyst - hysteresis for temperature minimum (read-only) | |
| 69 | temp#_max_hyst - hysteresis for temperature maximum (read/write) | |
| 70 | temp#_crit_hyst - hysteresis for critical temperature (read-only) | |
| 71 | temp#_min_alarm - temperature minimum alarm flag | |
| 72 | temp#_max_alarm - temperature maximum alarm flag | |
| 73 | temp#_crit_alarm - critical temperature alarm flag |