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diff --git a/Documentation/hwmon/ucd9200.rst b/Documentation/hwmon/ucd9200.rst new file mode 100644 index 000000000000..b819dfd75f71 --- /dev/null +++ b/Documentation/hwmon/ucd9200.rst @@ -0,0 +1,124 @@ +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 <linux@roeck-us.net> + + +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.rst 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.rst 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 Minimum Voltage. From VIN_UV_WARN_LIMIT register. +in1_max Maximum voltage. From VIN_OV_WARN_LIMIT register. +in1_lcrit Critical minimum 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 Minimum Voltage. From VOUT_UV_WARN_LIMIT register. +in[2-5]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. +in[2-5]_lcrit Critical minimum 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 minimum 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. +======================= ======================================================== |