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authorGuenter Roeck <guenter.roeck@ericsson.com>2011-03-06 15:54:27 -0800
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-05-19 08:19:39 -0700
commit84fc4585c152f34a1a90a03b7abb88a2e1218a42 (patch)
tree935db492d491ade667075fe86a460442311abf38 /Documentation/hwmon
parent6586b14c7bdec22f59dc749ead1d01d542d793b6 (diff)
downloadop-kernel-dev-84fc4585c152f34a1a90a03b7abb88a2e1218a42.zip
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hwmon: (pmbus) Add support for TI UCD9200 series of PWM System Controllers
This patch adds hardware monitoring support for TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248 Digital PWM System Controllers. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Tom Grennan <tom.grennan@ericsson.com>
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+Kernel driver ucd9200
+=====================
+
+Supported chips:
+ * TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248
+ Prefixes: 'ucd9220', 'ucd9222', 'ucd9224', 'ucd9240', 'ucd9244', 'ucd9246',
+ 'ucd9248'
+ Addresses scanned: -
+ Datasheets:
+ http://focus.ti.com/lit/ds/symlink/ucd9220.pdf
+ http://focus.ti.com/lit/ds/symlink/ucd9222.pdf
+ http://focus.ti.com/lit/ds/symlink/ucd9224.pdf
+ http://focus.ti.com/lit/ds/symlink/ucd9240.pdf
+ http://focus.ti.com/lit/ds/symlink/ucd9244.pdf
+ http://focus.ti.com/lit/ds/symlink/ucd9246.pdf
+ http://focus.ti.com/lit/ds/symlink/ucd9248.pdf
+
+Author: Guenter Roeck <guenter.roeck@ericsson.com>
+
+
+Description
+-----------
+
+[From datasheets] UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and
+UCD9248 are multi-rail, multi-phase synchronous buck digital PWM controllers
+designed for non-isolated DC/DC power applications. The devices integrate
+dedicated circuitry for DC/DC loop management with flash memory and a serial
+interface to support configuration, monitoring and management.
+
+This driver is a client driver to the core PMBus driver. Please see
+Documentation/hwmon/pmbus for details on PMBus client drivers.
+
+
+Usage Notes
+-----------
+
+This driver does not auto-detect devices. You will have to instantiate the
+devices explicitly. Please see Documentation/i2c/instantiating-devices for
+details.
+
+
+Platform data support
+---------------------
+
+The driver supports standard PMBus driver platform data. Please see
+Documentation/hwmon/pmbus for details.
+
+
+Sysfs entries
+-------------
+
+The following attributes are supported. Limits are read-write; all other
+attributes are read-only.
+
+in1_label "vin".
+in1_input Measured voltage. From READ_VIN register.
+in1_min Minumum Voltage. From VIN_UV_WARN_LIMIT register.
+in1_max Maximum voltage. From VIN_OV_WARN_LIMIT register.
+in1_lcrit Critical minumum Voltage. VIN_UV_FAULT_LIMIT register.
+in1_crit Critical maximum voltage. From VIN_OV_FAULT_LIMIT register.
+in1_min_alarm Voltage low alarm. From VIN_UV_WARNING status.
+in1_max_alarm Voltage high alarm. From VIN_OV_WARNING status.
+in1_lcrit_alarm Voltage critical low alarm. From VIN_UV_FAULT status.
+in1_crit_alarm Voltage critical high alarm. From VIN_OV_FAULT status.
+
+in[2-5]_label "vout[1-4]".
+in[2-5]_input Measured voltage. From READ_VOUT register.
+in[2-5]_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
+in[2-5]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
+in[2-5]_lcrit Critical minumum Voltage. VOUT_UV_FAULT_LIMIT register.
+in[2-5]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
+in[2-5]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
+in[2-5]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
+in[2-5]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
+in[2-5]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
+
+curr1_label "iin".
+curr1_input Measured current. From READ_IIN register.
+
+curr[2-5]_label "iout[1-4]".
+curr[2-5]_input Measured current. From READ_IOUT register.
+curr[2-5]_max Maximum current. From IOUT_OC_WARN_LIMIT register.
+curr[2-5]_lcrit Critical minumum output current. From IOUT_UC_FAULT_LIMIT
+ register.
+curr[2-5]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
+curr[2-5]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
+curr[2-5]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
+
+power1_input Measured input power. From READ_PIN register.
+power1_label "pin"
+
+power[2-5]_input Measured output power. From READ_POUT register.
+power[2-5]_label "pout[1-4]"
+
+ The number of output voltage, current, and power
+ attribute sets is determined by the number of enabled
+ rails. See chip datasheets for details.
+
+temp[1-5]_input Measured temperatures. From READ_TEMPERATURE_1 and
+ READ_TEMPERATURE_2 registers.
+ temp1 is the chip internal temperature. temp[2-5] are
+ rail temperatures. temp[2-5] attributes are only
+ created for enabled rails. See chip datasheets for
+ details.
+temp[1-5]_max Maximum temperature. From OT_WARN_LIMIT register.
+temp[1-5]_crit Critical high temperature. From OT_FAULT_LIMIT register.
+temp[1-5]_max_alarm Temperature high alarm.
+temp[1-5]_crit_alarm Temperature critical high alarm.
+
+fan1_input Fan RPM. ucd9240 only.
+fan1_alarm Fan alarm. ucd9240 only.
+fan1_fault Fan fault. ucd9240 only.
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