hwmon: (pmbus/ltc2978) Add support for LTC2974 and LTC3883
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/Documentation/hwmon/ltc2978 b/Documentation/hwmon/ltc2978
index dcb10be..dc0d08c 100644
--- a/Documentation/hwmon/ltc2978
+++ b/Documentation/hwmon/ltc2978
@@ -2,6 +2,10 @@
=====================
Supported chips:
+ * Linear Technology LTC2974
+ Prefix: 'ltc2974'
+ Addresses scanned: -
+ Datasheet: http://www.linear.com/product/ltc2974
* Linear Technology LTC2978
Prefix: 'ltc2978'
Addresses scanned: -
@@ -10,6 +14,10 @@
Prefix: 'ltc3880'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc3880
+ * Linear Technology LTC3883
+ Prefix: 'ltc3883'
+ Addresses scanned: -
+ Datasheet: http://www.linear.com/product/ltc3883
Author: Guenter Roeck <linux@roeck-us.net>
@@ -17,9 +25,9 @@
Description
-----------
-The LTC2978 is an octal power supply monitor, supervisor, sequencer and
-margin controller. The LTC3880 is a dual, PolyPhase DC/DC synchronous
-step-down switching regulator controller.
+LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
+monitor. LTC3880 is a dual output poly-phase step-down DC/DC controller. LTC3883
+is a single phase step-down DC/DC controller.
Usage Notes
@@ -41,60 +49,90 @@
in1_label "vin"
in1_input Measured input voltage.
in1_min Minimum input voltage.
-in1_max Maximum input voltage. LTC2978 only.
-in1_lcrit Critical minimum input voltage. LTC2978 only.
+in1_max Maximum input voltage. LTC2974 and LTC2978 only.
+in1_lcrit Critical minimum input voltage. LTC2974 and LTC2978
+ only.
in1_crit Critical maximum input voltage.
in1_min_alarm Input voltage low alarm.
-in1_max_alarm Input voltage high alarm. LTC2978 only.
-in1_lcrit_alarm Input voltage critical low alarm. LTC2978 only.
+in1_max_alarm Input voltage high alarm. LTC2974 and LTC2978 only.
+in1_lcrit_alarm Input voltage critical low alarm. LTC2974 and LTC2978
+ only.
in1_crit_alarm Input voltage critical high alarm.
-in1_lowest Lowest input voltage. LTC2978 only.
+in1_lowest Lowest input voltage. LTC2974 and LTC2978 only.
in1_highest Highest input voltage.
in1_reset_history Reset input voltage history.
-in[2-9]_label "vout[1-8]". Channels 3 to 9 on LTC2978 only.
-in[2-9]_input Measured output voltage.
-in[2-9]_min Minimum output voltage.
-in[2-9]_max Maximum output voltage.
-in[2-9]_lcrit Critical minimum output voltage.
-in[2-9]_crit Critical maximum output voltage.
-in[2-9]_min_alarm Output voltage low alarm.
-in[2-9]_max_alarm Output voltage high alarm.
-in[2-9]_lcrit_alarm Output voltage critical low alarm.
-in[2-9]_crit_alarm Output voltage critical high alarm.
-in[2-9]_lowest Lowest output voltage. LTC2978 only.
-in[2-9]_highest Lowest output voltage.
-in[2-9]_reset_history Reset output voltage history.
+in[N]_label "vout[1-8]".
+ LTC2974: N=2-5
+ LTC2978: N=2-9
+ LTC3880: N=2-3
+ LTC3883: N=2
+in[N]_input Measured output voltage.
+in[N]_min Minimum output voltage.
+in[N]_max Maximum output voltage.
+in[N]_lcrit Critical minimum output voltage.
+in[N]_crit Critical maximum output voltage.
+in[N]_min_alarm Output voltage low alarm.
+in[N]_max_alarm Output voltage high alarm.
+in[N]_lcrit_alarm Output voltage critical low alarm.
+in[N]_crit_alarm Output voltage critical high alarm.
+in[N]_lowest Lowest output voltage. LTC2974 and LTC2978 only.
+in[N]_highest Highest output voltage.
+in[N]_reset_history Reset output voltage history.
-temp[1-3]_input Measured temperature.
+temp[N]_input Measured temperature.
+ On LTC2974, temp[1-4] report external temperatures,
+ and temp5 reports the chip temperature.
On LTC2978, only one temperature measurement is
supported and reports the chip temperature.
On LTC3880, temp1 and temp2 report external
- temperatures, and temp3 reports the chip
- temperature.
-temp[1-3]_min Mimimum temperature. LTC2978 only.
-temp[1-3]_max Maximum temperature.
-temp[1-3]_lcrit Critical low temperature.
-temp[1-3]_crit Critical high temperature.
-temp[1-3]_min_alarm Temperature low alarm. LTC2978 only.
-temp[1-3]_max_alarm Temperature high alarm.
-temp[1-3]_lcrit_alarm Temperature critical low alarm.
-temp[1-3]_crit_alarm Temperature critical high alarm.
-temp[1-3]_lowest Lowest measured temperature. LTC2978 only.
-temp[1-3]_highest Highest measured temperature.
-temp[1-3]_reset_history Reset temperature history.
+ temperatures, and temp3 reports the chip temperature.
+ On LTC3883, temp1 reports an external temperature,
+ and temp2 reports the chip temperature.
+temp[N]_min Mimimum temperature. LTC2974 and LTC2978 only.
+temp[N]_max Maximum temperature.
+temp[N]_lcrit Critical low temperature.
+temp[N]_crit Critical high temperature.
+temp[N]_min_alarm Temperature low alarm. LTC2974 and LTC2978 only.
+temp[N]_max_alarm Temperature high alarm.
+temp[N]_lcrit_alarm Temperature critical low alarm.
+temp[N]_crit_alarm Temperature critical high alarm.
+temp[N]_lowest Lowest measured temperature. LTC2974 and LTC2978 only.
+ Not supported for chip temperature sensor on LTC2974.
+temp[N]_highest Highest measured temperature. Not supported for chip
+ temperature sensor on LTC2974.
+temp[N]_reset_history Reset temperature history. Not supported for chip
+ temperature sensor on LTC2974.
-power[1-2]_label "pout[1-2]". LTC3880 only.
-power[1-2]_input Measured power.
+power1_label "pin". LTC3883 only.
+power1_input Measured input power.
-curr1_label "iin". LTC3880 only.
+power[N]_label "pout[1-4]".
+ LTC2974: N=1-4
+ LTC2978: Not supported
+ LTC3880: N=1-2
+ LTC3883: N=2
+power[N]_input Measured output power.
+
+curr1_label "iin". LTC3880 and LTC3883 only.
curr1_input Measured input current.
curr1_max Maximum input current.
curr1_max_alarm Input current high alarm.
+curr1_highest Highest input current. LTC3883 only.
+curr1_reset_history Reset input current history. LTC3883 only.
-curr[2-3]_label "iout[1-2]". LTC3880 only.
-curr[2-3]_input Measured output current.
-curr[2-3]_max Maximum output current.
-curr[2-3]_crit Critical output current.
-curr[2-3]_max_alarm Output current high alarm.
-curr[2-3]_crit_alarm Output current critical high alarm.
+curr[N]_label "iout[1-4]".
+ LTC2974: N=1-4
+ LTC2978: not supported
+ LTC3880: N=2-3
+ LTC3883: N=2
+curr[N]_input Measured output current.
+curr[N]_max Maximum output current.
+curr[N]_crit Critical high output current.
+curr[N]_lcrit Critical low output current. LTC2974 only.
+curr[N]_max_alarm Output current high alarm.
+curr[N]_crit_alarm Output current critical high alarm.
+curr[N]_lcrit_alarm Output current critical low alarm. LTC2974 only.
+curr[N]_lowest Lowest output current. LTC2974 only.
+curr[N]_highest Highest output current.
+curr[N]_reset_history Reset output current history.