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Based on kernel version 3.13. Page generated on 2014-01-20 22:03 EST.

1	Kernel driver ltc2978
2	=====================
3	
4	Supported chips:
5	  * Linear Technology LTC2974
6	    Prefix: 'ltc2974'
7	    Addresses scanned: -
8	    Datasheet: http://www.linear.com/product/ltc2974
9	  * Linear Technology LTC2977
10	    Prefix: 'ltc2977'
11	    Addresses scanned: -
12	    Datasheet: http://www.linear.com/product/ltc2977
13	  * Linear Technology LTC2978, LTC2978A
14	    Prefix: 'ltc2978'
15	    Addresses scanned: -
16	    Datasheet: http://www.linear.com/product/ltc2978
17	    	       http://www.linear.com/product/ltc2978a
18	  * Linear Technology LTC3880
19	    Prefix: 'ltc3880'
20	    Addresses scanned: -
21	    Datasheet: http://www.linear.com/product/ltc3880
22	  * Linear Technology LTC3883
23	    Prefix: 'ltc3883'
24	    Addresses scanned: -
25	    Datasheet: http://www.linear.com/product/ltc3883
26	
27	Author: Guenter Roeck <linux@roeck-us.net>
28	
29	
30	Description
31	-----------
32	
33	LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
34	monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
35	output poly-phase step-down DC/DC controller. LTC3883 is a single phase
36	step-down DC/DC controller.
37	
38	
39	Usage Notes
40	-----------
41	
42	This driver does not probe for PMBus devices. You will have to instantiate
43	devices explicitly.
44	
45	Example: the following commands will load the driver for an LTC2978 at address
46	0x60 on I2C bus #1:
47	
48	# modprobe ltc2978
49	# echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
50	
51	
52	Sysfs attributes
53	----------------
54	
55	in1_label		"vin"
56	in1_input		Measured input voltage.
57	in1_min			Minimum input voltage.
58	in1_max			Maximum input voltage.
59				LTC2974, LTC2977, and LTC2978 only.
60	in1_lcrit		Critical minimum input voltage.
61				LTC2974, LTC2977, and LTC2978 only.
62	in1_crit		Critical maximum input voltage.
63	in1_min_alarm		Input voltage low alarm.
64	in1_max_alarm		Input voltage high alarm.
65				LTC2974, LTC2977, and LTC2978 only.
66	in1_lcrit_alarm		Input voltage critical low alarm.
67				LTC2974, LTC2977, and LTC2978 only.
68	in1_crit_alarm		Input voltage critical high alarm.
69	in1_lowest		Lowest input voltage.
70				LTC2974, LTC2977, and LTC2978 only.
71	in1_highest		Highest input voltage.
72	in1_reset_history	Reset input voltage history.
73	
74	in[N]_label		"vout[1-8]".
75				LTC2974: N=2-5
76				LTC2977: N=2-9
77				LTC2978: N=2-9
78				LTC3880: N=2-3
79				LTC3883: N=2
80	in[N]_input		Measured output voltage.
81	in[N]_min		Minimum output voltage.
82	in[N]_max		Maximum output voltage.
83	in[N]_lcrit		Critical minimum output voltage.
84	in[N]_crit		Critical maximum output voltage.
85	in[N]_min_alarm		Output voltage low alarm.
86	in[N]_max_alarm		Output voltage high alarm.
87	in[N]_lcrit_alarm	Output voltage critical low alarm.
88	in[N]_crit_alarm	Output voltage critical high alarm.
89	in[N]_lowest		Lowest output voltage. LTC2974 and LTC2978 only.
90	in[N]_highest		Highest output voltage.
91	in[N]_reset_history	Reset output voltage history.
92	
93	temp[N]_input		Measured temperature.
94				On LTC2974, temp[1-4] report external temperatures,
95				and temp5 reports the chip temperature.
96				On LTC2977 and LTC2978, only one temperature measurement
97				is supported and reports the chip temperature.
98				On LTC3880, temp1 and temp2 report external
99				temperatures, and temp3 reports the chip temperature.
100				On LTC3883, temp1 reports an external temperature,
101				and temp2 reports the chip temperature.
102	temp[N]_min		Mimimum temperature. LTC2974, LCT2977, and LTC2978 only.
103	temp[N]_max		Maximum temperature.
104	temp[N]_lcrit		Critical low temperature.
105	temp[N]_crit		Critical high temperature.
106	temp[N]_min_alarm	Temperature low alarm.
107				LTC2974, LTC2977, and LTC2978 only.
108	temp[N]_max_alarm	Temperature high alarm.
109	temp[N]_lcrit_alarm	Temperature critical low alarm.
110	temp[N]_crit_alarm	Temperature critical high alarm.
111	temp[N]_lowest		Lowest measured temperature.
112				LTC2974, LTC2977, and LTC2978 only.
113				Not supported for chip temperature sensor on LTC2974.
114	temp[N]_highest		Highest measured temperature. Not supported for chip
115				temperature sensor on LTC2974.
116	temp[N]_reset_history	Reset temperature history. Not supported for chip
117				temperature sensor on LTC2974.
118	
119	power1_label		"pin". LTC3883 only.
120	power1_input		Measured input power.
121	
122	power[N]_label		"pout[1-4]".
123				LTC2974: N=1-4
124				LTC2977: Not supported
125				LTC2978: Not supported
126				LTC3880: N=1-2
127				LTC3883: N=2
128	power[N]_input		Measured output power.
129	
130	curr1_label		"iin". LTC3880 and LTC3883 only.
131	curr1_input		Measured input current.
132	curr1_max		Maximum input current.
133	curr1_max_alarm		Input current high alarm.
134	curr1_highest		Highest input current. LTC3883 only.
135	curr1_reset_history	Reset input current history. LTC3883 only.
136	
137	curr[N]_label		"iout[1-4]".
138				LTC2974: N=1-4
139				LTC2977: not supported
140				LTC2978: not supported
141				LTC3880: N=2-3
142				LTC3883: N=2
143	curr[N]_input		Measured output current.
144	curr[N]_max		Maximum output current.
145	curr[N]_crit		Critical high output current.
146	curr[N]_lcrit		Critical low output current. LTC2974 only.
147	curr[N]_max_alarm	Output current high alarm.
148	curr[N]_crit_alarm	Output current critical high alarm.
149	curr[N]_lcrit_alarm	Output current critical low alarm. LTC2974 only.
150	curr[N]_lowest		Lowest output current. LTC2974 only.
151	curr[N]_highest		Highest output current.
152	curr[N]_reset_history	Reset output current history.
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