About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / hwmon / ltc2978




Custom Search

Based on kernel version 3.15.4. Page generated on 2014-07-07 09:03 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	  * Linear Technology LTM4676
27	    Prefix: 'ltm4676'
28	    Addresses scanned: -
29	    Datasheet: http://www.linear.com/product/ltm4676
30	
31	Author: Guenter Roeck <linux@roeck-us.net>
32	
33	
34	Description
35	-----------
36	
37	LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
38	monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
39	output poly-phase step-down DC/DC controller. LTC3883 is a single phase
40	step-down DC/DC controller. LTM4676 is a dual 13A or single 26A uModule
41	regulator.
42	
43	
44	Usage Notes
45	-----------
46	
47	This driver does not probe for PMBus devices. You will have to instantiate
48	devices explicitly.
49	
50	Example: the following commands will load the driver for an LTC2978 at address
51	0x60 on I2C bus #1:
52	
53	# modprobe ltc2978
54	# echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
55	
56	
57	Sysfs attributes
58	----------------
59	
60	in1_label		"vin"
61	in1_input		Measured input voltage.
62	in1_min			Minimum input voltage.
63	in1_max			Maximum input voltage.
64				LTC2974, LTC2977, and LTC2978 only.
65	in1_lcrit		Critical minimum input voltage.
66				LTC2974, LTC2977, and LTC2978 only.
67	in1_crit		Critical maximum input voltage.
68	in1_min_alarm		Input voltage low alarm.
69	in1_max_alarm		Input voltage high alarm.
70				LTC2974, LTC2977, and LTC2978 only.
71	in1_lcrit_alarm		Input voltage critical low alarm.
72				LTC2974, LTC2977, and LTC2978 only.
73	in1_crit_alarm		Input voltage critical high alarm.
74	in1_lowest		Lowest input voltage.
75				LTC2974, LTC2977, and LTC2978 only.
76	in1_highest		Highest input voltage.
77	in1_reset_history	Reset input voltage history.
78	
79	in[N]_label		"vout[1-8]".
80				LTC2974: N=2-5
81				LTC2977: N=2-9
82				LTC2978: N=2-9
83				LTC3880, LTM4676: N=2-3
84				LTC3883: N=2
85	in[N]_input		Measured output voltage.
86	in[N]_min		Minimum output voltage.
87	in[N]_max		Maximum output voltage.
88	in[N]_lcrit		Critical minimum output voltage.
89	in[N]_crit		Critical maximum output voltage.
90	in[N]_min_alarm		Output voltage low alarm.
91	in[N]_max_alarm		Output voltage high alarm.
92	in[N]_lcrit_alarm	Output voltage critical low alarm.
93	in[N]_crit_alarm	Output voltage critical high alarm.
94	in[N]_lowest		Lowest output voltage. LTC2974 and LTC2978 only.
95	in[N]_highest		Highest output voltage.
96	in[N]_reset_history	Reset output voltage history.
97	
98	temp[N]_input		Measured temperature.
99				On LTC2974, temp[1-4] report external temperatures,
100				and temp5 reports the chip temperature.
101				On LTC2977 and LTC2978, only one temperature measurement
102				is supported and reports the chip temperature.
103				On LTC3880 and LTM4676, temp1 and temp2 report external
104				temperatures, and temp3 reports the chip temperature.
105				On LTC3883, temp1 reports an external temperature,
106				and temp2 reports the chip temperature.
107	temp[N]_min		Mimimum temperature. LTC2974, LCT2977, and LTC2978 only.
108	temp[N]_max		Maximum temperature.
109	temp[N]_lcrit		Critical low temperature.
110	temp[N]_crit		Critical high temperature.
111	temp[N]_min_alarm	Temperature low alarm.
112				LTC2974, LTC2977, and LTC2978 only.
113	temp[N]_max_alarm	Temperature high alarm.
114	temp[N]_lcrit_alarm	Temperature critical low alarm.
115	temp[N]_crit_alarm	Temperature critical high alarm.
116	temp[N]_lowest		Lowest measured temperature.
117				LTC2974, LTC2977, and LTC2978 only.
118				Not supported for chip temperature sensor on LTC2974.
119	temp[N]_highest		Highest measured temperature. Not supported for chip
120				temperature sensor on LTC2974.
121	temp[N]_reset_history	Reset temperature history. Not supported for chip
122				temperature sensor on LTC2974.
123	
124	power1_label		"pin". LTC3883 only.
125	power1_input		Measured input power.
126	
127	power[N]_label		"pout[1-4]".
128				LTC2974: N=1-4
129				LTC2977: Not supported
130				LTC2978: Not supported
131				LTC3880, LTM4676: N=1-2
132				LTC3883: N=2
133	power[N]_input		Measured output power.
134	
135	curr1_label		"iin". LTC3880, LTC3883, and LTM4676 only.
136	curr1_input		Measured input current.
137	curr1_max		Maximum input current.
138	curr1_max_alarm		Input current high alarm.
139	curr1_highest		Highest input current. LTC3883 only.
140	curr1_reset_history	Reset input current history. LTC3883 only.
141	
142	curr[N]_label		"iout[1-4]".
143				LTC2974: N=1-4
144				LTC2977: not supported
145				LTC2978: not supported
146				LTC3880, LTM4676: N=2-3
147				LTC3883: N=2
148	curr[N]_input		Measured output current.
149	curr[N]_max		Maximum output current.
150	curr[N]_crit		Critical high output current.
151	curr[N]_lcrit		Critical low output current. LTC2974 only.
152	curr[N]_max_alarm	Output current high alarm.
153	curr[N]_crit_alarm	Output current critical high alarm.
154	curr[N]_lcrit_alarm	Output current critical low alarm. LTC2974 only.
155	curr[N]_lowest		Lowest output current. LTC2974 only.
156	curr[N]_highest		Highest output current.
157	curr[N]_reset_history	Reset output current history.
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.