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Based on kernel version 4.7.2. Page generated on 2016-08-22 22:46 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 LTC2975
10	    Prefix: 'ltc2975'
11	    Addresses scanned: -
12	    Datasheet: http://www.linear.com/product/ltc2975
13	  * Linear Technology LTC2977
14	    Prefix: 'ltc2977'
15	    Addresses scanned: -
16	    Datasheet: http://www.linear.com/product/ltc2977
17	  * Linear Technology LTC2978, LTC2978A
18	    Prefix: 'ltc2978'
19	    Addresses scanned: -
20	    Datasheet: http://www.linear.com/product/ltc2978
21	    	       http://www.linear.com/product/ltc2978a
22	  * Linear Technology LTC2980
23	    Prefix: 'ltc2980'
24	    Addresses scanned: -
25	    Datasheet: http://www.linear.com/product/ltc2980
26	  * Linear Technology LTC3880
27	    Prefix: 'ltc3880'
28	    Addresses scanned: -
29	    Datasheet: http://www.linear.com/product/ltc3880
30	  * Linear Technology LTC3882
31	    Prefix: 'ltc3882'
32	    Addresses scanned: -
33	    Datasheet: http://www.linear.com/product/ltc3882
34	  * Linear Technology LTC3883
35	    Prefix: 'ltc3883'
36	    Addresses scanned: -
37	    Datasheet: http://www.linear.com/product/ltc3883
38	  * Linear Technology LTC3886
39	    Prefix: 'ltc3886'
40	    Addresses scanned: -
41	    Datasheet: http://www.linear.com/product/ltc3886
42	  * Linear Technology LTC3887
43	    Prefix: 'ltc3887'
44	    Addresses scanned: -
45	    Datasheet: http://www.linear.com/product/ltc3887
46	  * Linear Technology LTM2987
47	    Prefix: 'ltm2987'
48	    Addresses scanned: -
49	    Datasheet: http://www.linear.com/product/ltm2987
50	  * Linear Technology LTM4675
51	    Prefix: 'ltm4675'
52	    Addresses scanned: -
53	    Datasheet: http://www.linear.com/product/ltm4675
54	  * Linear Technology LTM4676
55	    Prefix: 'ltm4676'
56	    Addresses scanned: -
57	    Datasheet: http://www.linear.com/product/ltm4676
58	
59	Author: Guenter Roeck <linux@roeck-us.net>
60	
61	
62	Description
63	-----------
64	
65	LTC2974 and LTC2975 are quad digital power supply managers.
66	LTC2978 is an octal power supply monitor.
67	LTC2977 is a pin compatible replacement for LTC2978.
68	LTC2980 is a 16-channel Power System Manager, consisting of two LTC2977
69	in a single die. The chip is instantiated and reported as two separate chips
70	on two different I2C bus addresses.
71	LTC3880, LTC3882, LTC3886, and LTC3887 are dual output poly-phase step-down
72	DC/DC controllers.
73	LTC3883 is a single phase step-down DC/DC controller.
74	LTM2987 is a 16-channel Power System Manager with two LTC2977 plus
75	additional components on a single die. The chip is instantiated and reported
76	as two separate chips on two different I2C bus addresses.
77	LTM4675 is a dual 9A or single 18A μModule regulator
78	LTM4676 is a dual 13A or single 26A uModule regulator.
79	
80	
81	Usage Notes
82	-----------
83	
84	This driver does not probe for PMBus devices. You will have to instantiate
85	devices explicitly.
86	
87	Example: the following commands will load the driver for an LTC2978 at address
88	0x60 on I2C bus #1:
89	
90	# modprobe ltc2978
91	# echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
92	
93	
94	Sysfs attributes
95	----------------
96	
97	in1_label		"vin"
98	in1_input		Measured input voltage.
99	in1_min			Minimum input voltage.
100	in1_max			Maximum input voltage.
101				LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
102				LTM2987 only.
103	in1_lcrit		Critical minimum input voltage.
104				LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
105				LTM2987 only.
106	in1_crit		Critical maximum input voltage.
107	in1_min_alarm		Input voltage low alarm.
108	in1_max_alarm		Input voltage high alarm.
109				LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
110				LTM2987 only.
111	in1_lcrit_alarm		Input voltage critical low alarm.
112				LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
113				LTM2987 only.
114	in1_crit_alarm		Input voltage critical high alarm.
115	in1_lowest		Lowest input voltage.
116				LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
117				LTM2987 only.
118	in1_highest		Highest input voltage.
119	in1_reset_history	Reset input voltage history.
120	
121	in[N]_label		"vout[1-8]".
122				LTC2974, LTC2975: N=2-5
123				LTC2977, LTC2980, LTM2987: N=2-9
124				LTC2978: N=2-9
125				LTC3880, LTC3882, LTC23886 LTC3887, LTM4675, LTM4676:
126					N=2-3
127				LTC3883: N=2
128	in[N]_input		Measured output voltage.
129	in[N]_min		Minimum output voltage.
130	in[N]_max		Maximum output voltage.
131	in[N]_lcrit		Critical minimum output voltage.
132	in[N]_crit		Critical maximum output voltage.
133	in[N]_min_alarm		Output voltage low alarm.
134	in[N]_max_alarm		Output voltage high alarm.
135	in[N]_lcrit_alarm	Output voltage critical low alarm.
136	in[N]_crit_alarm	Output voltage critical high alarm.
137	in[N]_lowest		Lowest output voltage. LTC2974, LTC2975,
138				and LTC2978 only.
139	in[N]_highest		Highest output voltage.
140	in[N]_reset_history	Reset output voltage history.
141	
142	temp[N]_input		Measured temperature.
143				On LTC2974 and LTC2975, temp[1-4] report external
144				temperatures, and temp5 reports the chip temperature.
145				On LTC2977, LTC2980, LTC2978, and LTM2987, only one
146				temperature measurement is supported and reports
147				the chip temperature.
148				On LTC3880, LTC3882, LTC3887, LTM4675, and LTM4676,
149				temp1 and temp2 report external temperatures, and temp3
150				reports the chip temperature.
151				On LTC3883, temp1 reports an external temperature,
152				and temp2 reports the chip temperature.
153	temp[N]_min		Mimimum temperature. LTC2974, LCT2977, LTM2980, LTC2978,
154				and LTM2987 only.
155	temp[N]_max		Maximum temperature.
156	temp[N]_lcrit		Critical low temperature.
157	temp[N]_crit		Critical high temperature.
158	temp[N]_min_alarm	Temperature low alarm.
159				LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
160				LTM2987 only.
161	temp[N]_max_alarm	Temperature high alarm.
162	temp[N]_lcrit_alarm	Temperature critical low alarm.
163	temp[N]_crit_alarm	Temperature critical high alarm.
164	temp[N]_lowest		Lowest measured temperature.
165				LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
166				LTM2987 only.
167				Not supported for chip temperature sensor on LTC2974 and
168				LTC2975.
169	temp[N]_highest		Highest measured temperature. Not supported for chip
170				temperature sensor on LTC2974 and LTC2975.
171	temp[N]_reset_history	Reset temperature history. Not supported for chip
172				temperature sensor on LTC2974 and LTC2975.
173	
174	power1_label		"pin". LTC3883 and LTC3886 only.
175	power1_input		Measured input power.
176	
177	power[N]_label		"pout[1-4]".
178				LTC2974, LTC2975: N=1-4
179				LTC2977, LTC2980, LTM2987: Not supported
180				LTC2978: Not supported
181				LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676:
182					N=1-2
183				LTC3883: N=2
184	power[N]_input		Measured output power.
185	
186	curr1_label		"iin". LTC3880, LTC3883, LTC3886, LTC3887, LTM4675,
187				and LTM4676 only.
188	curr1_input		Measured input current.
189	curr1_max		Maximum input current.
190	curr1_max_alarm		Input current high alarm.
191	curr1_highest		Highest input current. LTC3883 and LTC3886 only.
192	curr1_reset_history	Reset input current history. LTC3883 and LTC3886 only.
193	
194	curr[N]_label		"iout[1-4]".
195				LTC2974, LTC2975: N=1-4
196				LTC2977, LTC2980, LTM2987: not supported
197				LTC2978: not supported
198				LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676:
199					N=2-3
200				LTC3883: N=2
201	curr[N]_input		Measured output current.
202	curr[N]_max		Maximum output current.
203	curr[N]_crit		Critical high output current.
204	curr[N]_lcrit		Critical low output current. LTC2974 and LTC2975 only.
205	curr[N]_max_alarm	Output current high alarm.
206	curr[N]_crit_alarm	Output current critical high alarm.
207	curr[N]_lcrit_alarm	Output current critical low alarm.
208				LTC2974 and LTC2975 only.
209	curr[N]_lowest		Lowest output current. LTC2974 and LTC2975 only.
210	curr[N]_highest		Highest output current.
211	curr[N]_reset_history	Reset output current history.
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