200855e52d
Add support for Intersil / Zilker Labs ZL2004, ZL2006, ZL2008, ZL2105, ZL2106, ZL6100, and ZL6105. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
125 lines
4.2 KiB
Text
125 lines
4.2 KiB
Text
Kernel driver zl6100
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====================
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Supported chips:
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* Intersil / Zilker Labs ZL2004
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Prefix: 'zl2004'
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Addresses scanned: -
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Datasheet: http://www.intersil.com/data/fn/fn6847.pdf
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* Intersil / Zilker Labs ZL2006
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Prefix: 'zl2006'
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Addresses scanned: -
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Datasheet: http://www.intersil.com/data/fn/fn6850.pdf
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* Intersil / Zilker Labs ZL2008
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Prefix: 'zl2008'
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Addresses scanned: -
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Datasheet: http://www.intersil.com/data/fn/fn6859.pdf
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* Intersil / Zilker Labs ZL2105
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Prefix: 'zl2105'
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Addresses scanned: -
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Datasheet: http://www.intersil.com/data/fn/fn6851.pdf
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* Intersil / Zilker Labs ZL2106
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Prefix: 'zl2106'
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Addresses scanned: -
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Datasheet: http://www.intersil.com/data/fn/fn6852.pdf
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* Intersil / Zilker Labs ZL6100
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Prefix: 'zl6100'
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Addresses scanned: -
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Datasheet: http://www.intersil.com/data/fn/fn6876.pdf
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* Intersil / Zilker Labs ZL6105
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Prefix: 'zl6105'
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Addresses scanned: -
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Datasheet: http://www.intersil.com/data/fn/fn6906.pdf
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Author: Guenter Roeck <guenter.roeck@ericsson.com>
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Description
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-----------
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This driver supports hardware montoring for Intersil / Zilker Labs ZL6100 and
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compatible digital DC-DC controllers.
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The driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus and Documentation.hwmon/pmbus-core for details
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on PMBus client drivers.
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Usage Notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices for
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details.
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WARNING: Do not access chip registers using the i2cdump command, and do not use
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any of the i2ctools commands on a command register used to save and restore
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configuration data (0x11, 0x12, 0x15, 0x16, and 0xf4). The chips supported by
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this driver interpret any access to those command registers (including read
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commands) as request to execute the command in question. Unless write accesses
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to those registers are protected, this may result in power loss, board resets,
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and/or Flash corruption. Worst case, your board may turn into a brick.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data.
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Module parameters
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-----------------
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delay
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-----
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Some Intersil/Zilker Labs DC-DC controllers require a minimum interval between
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I2C bus accesses. According to Intersil, the minimum interval is 2 ms, though
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1 ms appears to be sufficient and has not caused any problems in testing.
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The problem is known to affect ZL6100, ZL2105, and ZL2008. It is known not to
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affect ZL2004 and ZL6105. The driver automatically sets the interval to 1 ms
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except for ZL2004 and ZL6105. To enable manual override, the driver provides a
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writeable module parameter, 'delay', which can be used to set the interval to
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a value between 0 and 65,535 microseconds.
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Sysfs entries
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-------------
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The following attributes are supported. Limits are read-write; all other
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attributes are read-only.
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in1_label "vin"
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in1_input Measured input voltage.
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in1_min Minimum input voltage.
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in1_max Maximum input voltage.
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in1_lcrit Critical minumum input voltage.
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in1_crit Critical maximum input voltage.
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in1_min_alarm Input voltage low alarm.
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in1_max_alarm Input voltage high alarm.
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in1_lcrit_alarm Input voltage critical low alarm.
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in1_crit_alarm Input voltage critical high alarm.
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in2_label "vout1"
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in2_input Measured output voltage.
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in2_lcrit Critical minumum output Voltage.
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in2_crit Critical maximum output voltage.
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in2_lcrit_alarm Critical output voltage critical low alarm.
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in2_crit_alarm Critical output voltage critical high alarm.
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curr1_label "iout1"
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curr1_input Measured output current.
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curr1_lcrit Critical minimum output current.
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curr1_crit Critical maximum output current.
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curr1_lcrit_alarm Output current critical low alarm.
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curr1_crit_alarm Output current critical high alarm.
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temp[12]_input Measured temperature.
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temp[12]_min Minimum temperature.
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temp[12]_max Maximum temperature.
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temp[12]_lcrit Critical low temperature.
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temp[12]_crit Critical high temperature.
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temp[12]_min_alarm Chip temperature low alarm.
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temp[12]_max_alarm Chip temperature high alarm.
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temp[12]_lcrit_alarm Chip temperature critical low alarm.
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temp[12]_crit_alarm Chip temperature critical high alarm.
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