5 * Linear Technology LTC2974
8 Datasheet: http://www.linear.com/product/ltc2974
9 * Linear Technology LTC2977
12 Datasheet: http://www.linear.com/product/ltc2977
13 * Linear Technology LTC2978
16 Datasheet: http://www.linear.com/product/ltc2978
17 * Linear Technology LTC3880
20 Datasheet: http://www.linear.com/product/ltc3880
21 * Linear Technology LTC3883
24 Datasheet: http://www.linear.com/product/ltc3883
26 Author: Guenter Roeck <linux@roeck-us.net>
32 LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
33 monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
34 output poly-phase step-down DC/DC controller. LTC3883 is a single phase
35 step-down DC/DC controller.
41 This driver does not probe for PMBus devices. You will have to instantiate
44 Example: the following commands will load the driver for an LTC2978 at address
48 # echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
55 in1_input Measured input voltage.
56 in1_min Minimum input voltage.
57 in1_max Maximum input voltage.
58 LTC2974, LTC2977, and LTC2978 only.
59 in1_lcrit Critical minimum input voltage.
60 LTC2974, LTC2977, and LTC2978 only.
61 in1_crit Critical maximum input voltage.
62 in1_min_alarm Input voltage low alarm.
63 in1_max_alarm Input voltage high alarm.
64 LTC2974, LTC2977, and LTC2978 only.
65 in1_lcrit_alarm Input voltage critical low alarm.
66 LTC2974, LTC2977, and LTC2978 only.
67 in1_crit_alarm Input voltage critical high alarm.
68 in1_lowest Lowest input voltage.
69 LTC2974, LTC2977, and LTC2978 only.
70 in1_highest Highest input voltage.
71 in1_reset_history Reset input voltage history.
73 in[N]_label "vout[1-8]".
79 in[N]_input Measured output voltage.
80 in[N]_min Minimum output voltage.
81 in[N]_max Maximum output voltage.
82 in[N]_lcrit Critical minimum output voltage.
83 in[N]_crit Critical maximum output voltage.
84 in[N]_min_alarm Output voltage low alarm.
85 in[N]_max_alarm Output voltage high alarm.
86 in[N]_lcrit_alarm Output voltage critical low alarm.
87 in[N]_crit_alarm Output voltage critical high alarm.
88 in[N]_lowest Lowest output voltage. LTC2974 and LTC2978 only.
89 in[N]_highest Highest output voltage.
90 in[N]_reset_history Reset output voltage history.
92 temp[N]_input Measured temperature.
93 On LTC2974, temp[1-4] report external temperatures,
94 and temp5 reports the chip temperature.
95 On LTC2977 and LTC2978, only one temperature measurement
96 is supported and reports the chip temperature.
97 On LTC3880, temp1 and temp2 report external
98 temperatures, and temp3 reports the chip temperature.
99 On LTC3883, temp1 reports an external temperature,
100 and temp2 reports the chip temperature.
101 temp[N]_min Mimimum temperature. LTC2974, LCT2977, and LTC2978 only.
102 temp[N]_max Maximum temperature.
103 temp[N]_lcrit Critical low temperature.
104 temp[N]_crit Critical high temperature.
105 temp[N]_min_alarm Temperature low alarm.
106 LTC2974, LTC2977, and LTC2978 only.
107 temp[N]_max_alarm Temperature high alarm.
108 temp[N]_lcrit_alarm Temperature critical low alarm.
109 temp[N]_crit_alarm Temperature critical high alarm.
110 temp[N]_lowest Lowest measured temperature.
111 LTC2974, LTC2977, and LTC2978 only.
112 Not supported for chip temperature sensor on LTC2974.
113 temp[N]_highest Highest measured temperature. Not supported for chip
114 temperature sensor on LTC2974.
115 temp[N]_reset_history Reset temperature history. Not supported for chip
116 temperature sensor on LTC2974.
118 power1_label "pin". LTC3883 only.
119 power1_input Measured input power.
121 power[N]_label "pout[1-4]".
123 LTC2977: Not supported
124 LTC2978: Not supported
127 power[N]_input Measured output power.
129 curr1_label "iin". LTC3880 and LTC3883 only.
130 curr1_input Measured input current.
131 curr1_max Maximum input current.
132 curr1_max_alarm Input current high alarm.
133 curr1_highest Highest input current. LTC3883 only.
134 curr1_reset_history Reset input current history. LTC3883 only.
136 curr[N]_label "iout[1-4]".
138 LTC2977: not supported
139 LTC2978: not supported
142 curr[N]_input Measured output current.
143 curr[N]_max Maximum output current.
144 curr[N]_crit Critical high output current.
145 curr[N]_lcrit Critical low output current. LTC2974 only.
146 curr[N]_max_alarm Output current high alarm.
147 curr[N]_crit_alarm Output current critical high alarm.
148 curr[N]_lcrit_alarm Output current critical low alarm. LTC2974 only.
149 curr[N]_lowest Lowest output current. LTC2974 only.
150 curr[N]_highest Highest output current.
151 curr[N]_reset_history Reset output current history.