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1 | Kernel driver ucd9000 |
2 | ===================== | |
3 | ||
4 | Supported chips: | |
50b2b02c MW |
5 | * TI UCD90120, UCD90124, UCD90160, UCD9090, and UCD90910 |
6 | Prefixes: 'ucd90120', 'ucd90124', 'ucd90160', 'ucd9090', 'ucd90910' | |
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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 | |
50b2b02c | 11 | http://focus.ti.com/lit/ds/symlink/ucd90160.pdf |
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12 | http://focus.ti.com/lit/ds/symlink/ucd9090.pdf |
13 | http://focus.ti.com/lit/ds/symlink/ucd90910.pdf | |
14 | ||
e3333e57 | 15 | Author: Guenter Roeck <linux@roeck-us.net> |
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16 | |
17 | ||
18 | Description | |
19 | ----------- | |
20 | ||
21 | From datasheets: | |
22 | ||
23 | The UCD90120 Power Supply Sequencer and System Health Monitor monitors and | |
24 | sequences up to 12 independent voltage rails. The device integrates a 12-bit | |
25 | ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage, | |
26 | current, or temperature inputs. | |
27 | ||
28 | The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and | |
29 | system-health monitor. The device integrates a 12-bit ADC for monitoring up to | |
30 | 13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins | |
31 | can be used for power supply enables, power-on reset signals, external | |
32 | interrupts, cascading, or other system functions. Twelve of these pins offer PWM | |
33 | functionality. Using these pins, the UCD90124 offers support for fan control, | |
34 | margining, and general-purpose PWM functions. | |
35 | ||
50b2b02c MW |
36 | The UCD90160 is a 16-rail PMBus/I2C addressable power-supply sequencer and |
37 | monitor. The device integrates a 12-bit ADC for monitoring up to 16 power-supply | |
38 | voltage inputs. Twenty-six GPIO pins can be used for power supply enables, | |
39 | power-on reset signals, external interrupts, cascading, or other system | |
40 | functions. Twelve of these pins offer PWM functionality. Using these pins, the | |
41 | UCD90160 offers support for margining, and general-purpose PWM functions. | |
42 | ||
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43 | The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and |
44 | monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply | |
45 | voltage inputs. Twenty-three GPIO pins can be used for power supply enables, | |
46 | power-on reset signals, external interrupts, cascading, or other system | |
47 | functions. Ten of these pins offer PWM functionality. Using these pins, the | |
48 | UCD9090 offers support for margining, and general-purpose PWM functions. | |
49 | ||
50 | The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and | |
51 | system-health monitor. The device integrates a 12-bit ADC for monitoring up to | |
52 | 13 power-supply voltage, current, or temperature inputs. | |
53 | ||
54 | This driver is a client driver to the core PMBus driver. Please see | |
55 | Documentation/hwmon/pmbus for details on PMBus client drivers. | |
56 | ||
57 | ||
58 | Usage Notes | |
59 | ----------- | |
60 | ||
61 | This driver does not auto-detect devices. You will have to instantiate the | |
62 | devices explicitly. Please see Documentation/i2c/instantiating-devices for | |
63 | details. | |
64 | ||
65 | ||
66 | Platform data support | |
67 | --------------------- | |
68 | ||
69 | The driver supports standard PMBus driver platform data. Please see | |
70 | Documentation/hwmon/pmbus for details. | |
71 | ||
72 | ||
73 | Sysfs entries | |
74 | ------------- | |
75 | ||
76 | The following attributes are supported. Limits are read-write; all other | |
77 | attributes are read-only. | |
78 | ||
79 | in[1-12]_label "vout[1-12]". | |
80 | in[1-12]_input Measured voltage. From READ_VOUT register. | |
40e47125 | 81 | in[1-12]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. |
0c0a0615 | 82 | in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. |
40e47125 | 83 | in[1-12]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. |
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84 | in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register. |
85 | in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. | |
86 | in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. | |
87 | in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status. | |
88 | in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status. | |
89 | ||
90 | curr[1-12]_label "iout[1-12]". | |
91 | curr[1-12]_input Measured current. From READ_IOUT register. | |
92 | curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register. | |
40e47125 | 93 | curr[1-12]_lcrit Critical minimum output current. From IOUT_UC_FAULT_LIMIT |
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94 | register. |
95 | curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. | |
96 | curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status. | |
97 | curr[1-12]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. | |
98 | ||
99 | For each attribute index, either voltage or current is | |
100 | reported, but not both. If voltage or current is | |
101 | reported depends on the chip configuration. | |
102 | ||
103 | temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and | |
104 | READ_TEMPERATURE_2 registers. | |
105 | temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register. | |
106 | temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register. | |
107 | temp[1-2]_max_alarm Temperature high alarm. | |
108 | temp[1-2]_crit_alarm Temperature critical high alarm. | |
109 | ||
110 | fan[1-4]_input Fan RPM. | |
111 | fan[1-4]_alarm Fan alarm. | |
112 | fan[1-4]_fault Fan fault. | |
113 | ||
114 | Fan attributes are only available on chips supporting | |
115 | fan control (UCD90124, UCD90910). Attribute files are | |
116 | created only for enabled fans. | |
117 | Note that even though UCD90910 supports up to 10 fans, | |
118 | only up to four fans are currently supported. |