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0c0a0615 GR |
1 | Kernel driver ucd9000 |
2 | ===================== | |
3 | ||
4 | Supported 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 | ||
14 | Author: Guenter Roeck <guenter.roeck@ericsson.com> | |
15 | ||
16 | ||
17 | Description | |
18 | ----------- | |
19 | ||
20 | From datasheets: | |
21 | ||
22 | The UCD90120 Power Supply Sequencer and System Health Monitor monitors and | |
23 | sequences up to 12 independent voltage rails. The device integrates a 12-bit | |
24 | ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage, | |
25 | current, or temperature inputs. | |
26 | ||
27 | The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and | |
28 | system-health monitor. The device integrates a 12-bit ADC for monitoring up to | |
29 | 13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins | |
30 | can be used for power supply enables, power-on reset signals, external | |
31 | interrupts, cascading, or other system functions. Twelve of these pins offer PWM | |
32 | functionality. Using these pins, the UCD90124 offers support for fan control, | |
33 | margining, and general-purpose PWM functions. | |
34 | ||
35 | The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and | |
36 | monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply | |
37 | voltage inputs. Twenty-three GPIO pins can be used for power supply enables, | |
38 | power-on reset signals, external interrupts, cascading, or other system | |
39 | functions. Ten of these pins offer PWM functionality. Using these pins, the | |
40 | UCD9090 offers support for margining, and general-purpose PWM functions. | |
41 | ||
42 | The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and | |
43 | system-health monitor. The device integrates a 12-bit ADC for monitoring up to | |
44 | 13 power-supply voltage, current, or temperature inputs. | |
45 | ||
46 | This driver is a client driver to the core PMBus driver. Please see | |
47 | Documentation/hwmon/pmbus for details on PMBus client drivers. | |
48 | ||
49 | ||
50 | Usage Notes | |
51 | ----------- | |
52 | ||
53 | This driver does not auto-detect devices. You will have to instantiate the | |
54 | devices explicitly. Please see Documentation/i2c/instantiating-devices for | |
55 | details. | |
56 | ||
57 | ||
58 | Platform data support | |
59 | --------------------- | |
60 | ||
61 | The driver supports standard PMBus driver platform data. Please see | |
62 | Documentation/hwmon/pmbus for details. | |
63 | ||
64 | ||
65 | Sysfs entries | |
66 | ------------- | |
67 | ||
68 | The following attributes are supported. Limits are read-write; all other | |
69 | attributes are read-only. | |
70 | ||
71 | in[1-12]_label "vout[1-12]". | |
72 | in[1-12]_input Measured voltage. From READ_VOUT register. | |
73 | in[1-12]_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register. | |
74 | in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. | |
75 | in[1-12]_lcrit Critical minumum Voltage. VOUT_UV_FAULT_LIMIT register. | |
76 | in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register. | |
77 | in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. | |
78 | in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. | |
79 | in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status. | |
80 | in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status. | |
81 | ||
82 | curr[1-12]_label "iout[1-12]". | |
83 | curr[1-12]_input Measured current. From READ_IOUT register. | |
84 | curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register. | |
85 | curr[1-12]_lcrit Critical minumum output current. From IOUT_UC_FAULT_LIMIT | |
86 | register. | |
87 | curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. | |
88 | curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status. | |
89 | curr[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 | ||
95 | temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and | |
96 | READ_TEMPERATURE_2 registers. | |
97 | temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register. | |
98 | temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register. | |
99 | temp[1-2]_max_alarm Temperature high alarm. | |
100 | temp[1-2]_crit_alarm Temperature critical high alarm. | |
101 | ||
102 | fan[1-4]_input Fan RPM. | |
103 | fan[1-4]_alarm Fan alarm. | |
104 | fan[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. |