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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:03 EST.

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 <linux@roeck-us.net>
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		Minimum 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 minimum 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 minimum 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.
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