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Guenter Roeck0c0a0612011-03-08 22:01:39 -08001Kernel driver ucd9000
2=====================
3
4Supported chips:
5 * TI UCD90120, UCD90124, UCD9090, and UCD90910
6 Prefixes: 'ucd90120', 'ucd90124', 'ucd9090', 'ucd90910'
7 Addresses scanned: -
8 Datasheets:
9 http://focus.ti.com/lit/ds/symlink/ucd90120.pdf
10 http://focus.ti.com/lit/ds/symlink/ucd90124.pdf
11 http://focus.ti.com/lit/ds/symlink/ucd9090.pdf
12 http://focus.ti.com/lit/ds/symlink/ucd90910.pdf
13
14Author: Guenter Roeck <guenter.roeck@ericsson.com>
15
16
17Description
18-----------
19
20From datasheets:
21
22The UCD90120 Power Supply Sequencer and System Health Monitor monitors and
23sequences up to 12 independent voltage rails. The device integrates a 12-bit
24ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage,
25current, or temperature inputs.
26
27The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and
28system-health monitor. The device integrates a 12-bit ADC for monitoring up to
2913 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins
30can be used for power supply enables, power-on reset signals, external
31interrupts, cascading, or other system functions. Twelve of these pins offer PWM
32functionality. Using these pins, the UCD90124 offers support for fan control,
33margining, and general-purpose PWM functions.
34
35The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and
36monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply
37voltage inputs. Twenty-three GPIO pins can be used for power supply enables,
38power-on reset signals, external interrupts, cascading, or other system
39functions. Ten of these pins offer PWM functionality. Using these pins, the
40UCD9090 offers support for margining, and general-purpose PWM functions.
41
42The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and
43system-health monitor. The device integrates a 12-bit ADC for monitoring up to
4413 power-supply voltage, current, or temperature inputs.
45
46This driver is a client driver to the core PMBus driver. Please see
47Documentation/hwmon/pmbus for details on PMBus client drivers.
48
49
50Usage Notes
51-----------
52
53This driver does not auto-detect devices. You will have to instantiate the
54devices explicitly. Please see Documentation/i2c/instantiating-devices for
55details.
56
57
58Platform data support
59---------------------
60
61The driver supports standard PMBus driver platform data. Please see
62Documentation/hwmon/pmbus for details.
63
64
65Sysfs entries
66-------------
67
68The following attributes are supported. Limits are read-write; all other
69attributes are read-only.
70
71in[1-12]_label "vout[1-12]".
72in[1-12]_input Measured voltage. From READ_VOUT register.
73in[1-12]_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
74in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
75in[1-12]_lcrit Critical minumum Voltage. VOUT_UV_FAULT_LIMIT register.
76in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
77in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
78in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
79in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
80in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
81
82curr[1-12]_label "iout[1-12]".
83curr[1-12]_input Measured current. From READ_IOUT register.
84curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register.
85curr[1-12]_lcrit Critical minumum output current. From IOUT_UC_FAULT_LIMIT
86 register.
87curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
88curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
89curr[1-12]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
90
91 For each attribute index, either voltage or current is
92 reported, but not both. If voltage or current is
93 reported depends on the chip configuration.
94
95temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and
96 READ_TEMPERATURE_2 registers.
97temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register.
98temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register.
99temp[1-2]_max_alarm Temperature high alarm.
100temp[1-2]_crit_alarm Temperature critical high alarm.
101
102fan[1-4]_input Fan RPM.
103fan[1-4]_alarm Fan alarm.
104fan[1-4]_fault Fan fault.
105
106 Fan attributes are only available on chips supporting
107 fan control (UCD90124, UCD90910). Attribute files are
108 created only for enabled fans.
109 Note that even though UCD90910 supports up to 10 fans,
110 only up to four fans are currently supported.