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ccf988b66d
Convert each file at I2C subsystem, renaming them to .rst and adding to the driver-api book. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
125 lines
4.5 KiB
ReStructuredText
125 lines
4.5 KiB
ReStructuredText
Kernel driver ucd9200
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=====================
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Supported chips:
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* TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248
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Prefixes: 'ucd9220', 'ucd9222', 'ucd9224', 'ucd9240', 'ucd9244', 'ucd9246',
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'ucd9248'
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Addresses scanned: -
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Datasheets:
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- http://focus.ti.com/lit/ds/symlink/ucd9220.pdf
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- http://focus.ti.com/lit/ds/symlink/ucd9222.pdf
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- http://focus.ti.com/lit/ds/symlink/ucd9224.pdf
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- http://focus.ti.com/lit/ds/symlink/ucd9240.pdf
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- http://focus.ti.com/lit/ds/symlink/ucd9244.pdf
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- http://focus.ti.com/lit/ds/symlink/ucd9246.pdf
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- http://focus.ti.com/lit/ds/symlink/ucd9248.pdf
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Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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[From datasheets] UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and
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UCD9248 are multi-rail, multi-phase synchronous buck digital PWM controllers
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designed for non-isolated DC/DC power applications. The devices integrate
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dedicated circuitry for DC/DC loop management with flash memory and a serial
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interface to support configuration, monitoring and management.
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This driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus.rst for details 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.rst for
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details.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data. Please see
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Documentation/hwmon/pmbus.rst for details.
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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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======================= ========================================================
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in1_label "vin".
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in1_input Measured voltage. From READ_VIN register.
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in1_min Minimum Voltage. From VIN_UV_WARN_LIMIT register.
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in1_max Maximum voltage. From VIN_OV_WARN_LIMIT register.
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in1_lcrit Critical minimum Voltage. VIN_UV_FAULT_LIMIT register.
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in1_crit Critical maximum voltage. From VIN_OV_FAULT_LIMIT
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register.
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in1_min_alarm Voltage low alarm. From VIN_UV_WARNING status.
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in1_max_alarm Voltage high alarm. From VIN_OV_WARNING status.
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in1_lcrit_alarm Voltage critical low alarm. From VIN_UV_FAULT status.
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in1_crit_alarm Voltage critical high alarm. From VIN_OV_FAULT status.
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in[2-5]_label "vout[1-4]".
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in[2-5]_input Measured voltage. From READ_VOUT register.
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in[2-5]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register.
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in[2-5]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
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in[2-5]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.
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in[2-5]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT
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register.
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in[2-5]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
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in[2-5]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
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in[2-5]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT
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status.
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in[2-5]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT
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status.
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curr1_label "iin".
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curr1_input Measured current. From READ_IIN register.
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curr[2-5]_label "iout[1-4]".
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curr[2-5]_input Measured current. From READ_IOUT register.
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curr[2-5]_max Maximum current. From IOUT_OC_WARN_LIMIT register.
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curr[2-5]_lcrit Critical minimum output current. From
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IOUT_UC_FAULT_LIMIT register.
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curr[2-5]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT
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register.
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curr[2-5]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
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curr[2-5]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
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power1_input Measured input power. From READ_PIN register.
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power1_label "pin"
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power[2-5]_input Measured output power. From READ_POUT register.
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power[2-5]_label "pout[1-4]"
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The number of output voltage, current, and power
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attribute sets is determined by the number of enabled
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rails. See chip datasheets for details.
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temp[1-5]_input Measured temperatures. From READ_TEMPERATURE_1 and
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READ_TEMPERATURE_2 registers.
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temp1 is the chip internal temperature. temp[2-5] are
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rail temperatures. temp[2-5] attributes are only
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created for enabled rails. See chip datasheets for
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details.
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temp[1-5]_max Maximum temperature. From OT_WARN_LIMIT register.
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temp[1-5]_crit Critical high temperature. From OT_FAULT_LIMIT register.
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temp[1-5]_max_alarm Temperature high alarm.
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temp[1-5]_crit_alarm Temperature critical high alarm.
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fan1_input Fan RPM. ucd9240 only.
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fan1_alarm Fan alarm. ucd9240 only.
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fan1_fault Fan fault. ucd9240 only.
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======================= ========================================================
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