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https://github.com/lm-sensors/lm-sensors.git
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Frodo Looijaard
2a97e6f4cb
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@404 7894878c-1315-0410-8ee3-d5d059ff63e0
68 lines
2.5 KiB
Plaintext
68 lines
2.5 KiB
Plaintext
Kernel driver `ltc1710.o'
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=========================
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Status: Complete and well-tested
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Supported chips:
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* Linear Technologies LTC1710
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Prefix 'ltc1710'
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Addresses scanned: I2C 0x58 - 0x5a (inclusive)
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Datasheet: Publicly available at the Linear Technologies website
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Author: Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock
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<phil@netroedge.com>
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Module Parameters
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-----------------
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* force: short array (min = 1, max = 48)
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List of adapter,address pairs to boldly assume to be present
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* force_ltc1710: short array (min = 1, max = 48)
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List of adapter,address pairs which are unquestionably assumed to contain
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a `ltc1710' chip
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* ignore: short array (min = 1, max = 48)
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List of adapter,address pairs not to scan
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* ignore_range: short array (min = 1, max = 48)
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List of adapter,start-addr,end-addr triples not to scan
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* probe: short array (min = 1, max = 48)
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List of adapter,address pairs to scan additionally
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* probe_range: short array (min = 1, max = 48)
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List of adapter,start-addr,end-addr triples to scan additionally
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Description
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-----------
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This is some documenation for the ltc1710 driver for the Linear
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Technologies LTC1710.
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The LTC1710 is a simple dual switch device with a SMBus interface. It can
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switch a supply voltage to either of its two output pins independantly
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from the built-in SMBus interface.
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For each sensed LTC1710 there is a directory which looks something like:
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ltc1710-i2c-1-59
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For each directory there are the following files:
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* switch1 (LTC1710_SYSCTL_SWITCH_1)
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Simply contains either a 1 or 0 depending on whether the switch is
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currently turned on or off.
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* switch2 (LTC1710_SYSCTL_SWITCH_2)
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Works the same way as switch1, but is for the second switch.
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Some notes: The LTC1710 is a *very* simple I2C/SMBus device. It does not
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support reads, so the status of the switches isn't polled, but rather
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remembered. The LTC1710 has enough 'umph' to drive 300mA with only 0.4 Ohm
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impedence (in an 'on' state). This works well for LEDs, or to drive other
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devices (MOSFETs and such) which can multiply the switching effect. The
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LTC1710 also contains an emergency over-temperature shut-off in the case
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of too much current flow. Switch 2 switches the Vcc voltage on/off, but
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Switch 1 switches the voltage present on pin 1 (0V to Vcc).
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This driver was written and maintained by Philip Edelbrock
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<phil@netroedge.com>. Please send comments/suggestions/corrections to him.
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For more technical information on the LTC1710, please get the Acrobat PDF
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from http://www.linear-tech.com/
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