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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 13:50:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 13:50:06 -0700
commitcc150a2861e744d8f574d571762cc7e9f928abb3 (patch)
treea1567d76fc52dc56ba483d7dafa82fada5fc28ba /Documentation/hwmon/adt7410
parentd9a807461fc8cc0d6ba589ea0730d139122af012 (diff)
parent592758b12f2e327bb5902dabd3d36b2e86049871 (diff)
Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck: "New drivers for: MCP3221, ADT7410, MAX197 Chip support added to existing drivers: LM71, LM74, MAX1110, MAX1112, MAX1113, INA220, INA230, MCP3221 Cleanup: Use devm_ functions, fixed build warnings, removed deprecated sysfs attributes, code simplifications, dropped dependencies on EXPERIMENTAL" * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (64 commits) hwmon: (mcp3021) Add MCP3221 support hwmon: (mcp3021) Prepare MCP3021 driver to support other chips hwmon: (w83791d) Drop unnecessary compare statements hwmon: (lm93) Drop unnecessary compare statement hwmon: (lm70) Simplify show_name function hwmon: (adcxx) Simplify show_name function hwmon: Drop dependencies on EXPERIMENTAL hwmon: (it87) Fix Kconfig for IT87 driver hwmon: (sht15) move header to linux/platform_data/ hwmon: (asus_atk0110) Remove useless kfree hwmon: (ina2xx) Add support for INA220 and INA230 hwmon: (ina2xx) Use structure array to distinguish chip types hwmon: (max1111) Add support for MAX1110, MAX1112, and MAX1113 hwmon: (lm70) Add support for LM71 and LM74 hwmon: (Documentation) Update feature-removal-schedule.txt hwmon: (w83793) Remove legacy chassis intrusion detection sysfs attributes hwmon: (w83792d) Remove legacy chassis intrusion detection attributes hwmon: (adm9240) Remove legacy chassis intrusion detection sysfs attribute hwmon: (lm70) Allow 4wire SPI bus with LM70 hwmon: (sht15) remove multiple driver registration ...
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+Kernel driver adt7410
+=====================
+
+Supported chips:
+ * Analog Devices ADT7410
+ Prefix: 'adt7410'
+ Addresses scanned: I2C 0x48 - 0x4B
+ Datasheet: Publicly available at the Analog Devices website
+ http://www.analog.com/static/imported-files/data_sheets/ADT7410.pdf
+
+Author: Hartmut Knaack <knaack.h@gmx.de>
+
+Description
+-----------
+
+The ADT7410 is a temperature sensor with rated temperature range of -55°C to
++150°C. It has a high accuracy of +/-0.5°C and can be operated at a resolution
+of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an INT pin to
+indicate that a minimum or maximum temperature set point has been exceeded, as
+well as a critical temperature (CT) pin to indicate that the critical
+temperature set point has been exceeded. Both pins can be set up with a common
+hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events. Both
+pins can individually set to be active-low or active-high, while the whole
+device can either run in comparator mode or interrupt mode. The ADT7410
+supports continous temperature sampling, as well as sampling one temperature
+value per second or even justget one sample on demand for power saving.
+Besides, it can completely power down its ADC, if power management is
+required.
+
+Configuration Notes
+-------------------
+
+Since the device uses one hysteresis value, which is an offset to minimum,
+maximum and critical temperature, it can only be set for temp#_max_hyst.
+However, temp#_min_hyst and temp#_crit_hyst show their corresponding
+hysteresis.
+The device is set to 16 bit resolution and comparator mode.
+
+sysfs-Interface
+---------------
+
+temp#_input - temperature input
+temp#_min - temperature minimum setpoint
+temp#_max - temperature maximum setpoint
+temp#_crit - critical temperature setpoint
+temp#_min_hyst - hysteresis for temperature minimum (read-only)
+temp#_max_hyst - hysteresis for temperature maximum (read/write)
+temp#_crit_hyst - hysteresis for critical temperature (read-only)
+temp#_min_alarm - temperature minimum alarm flag
+temp#_max_alarm - temperature maximum alarm flag
+temp#_crit_alarm - critical temperature alarm flag