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authorGuenter Roeck <guenter.roeck@ericsson.com>2011-09-12 07:31:09 +0400
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-10-24 22:09:43 +0400
commitddfb41ca2a33c9f5053126324597510974724a1f (patch)
treed9f13049c8532cc5b0050de61c0ad5d90d6af5fe /Documentation/hwmon
parentc3ff9a674c2313d4f28e38d384b18b561b313eb7 (diff)
downloadlinux-ddfb41ca2a33c9f5053126324597510974724a1f.tar.xz
hwmon: (pmbus/ltc2978) Add support for LTC3880 to LTC2978 driver
The LTC3880 PMBus command set is comparable to LTC2978. Add support for it to the LTC2978 driver. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Diffstat (limited to 'Documentation/hwmon')
-rw-r--r--Documentation/hwmon/ltc297857
1 files changed, 41 insertions, 16 deletions
diff --git a/Documentation/hwmon/ltc2978 b/Documentation/hwmon/ltc2978
index 499129e11897..c365f9beb5dd 100644
--- a/Documentation/hwmon/ltc2978
+++ b/Documentation/hwmon/ltc2978
@@ -6,6 +6,10 @@ Supported chips:
Prefix: 'ltc2978'
Addresses scanned: -
Datasheet: http://cds.linear.com/docs/Datasheet/2978fa.pdf
+ * Linear Technology LTC3880
+ Prefix: 'ltc3880'
+ Addresses scanned: -
+ Datasheet: http://cds.linear.com/docs/Datasheet/3880f.pdf
Author: Guenter Roeck <guenter.roeck@ericsson.com>
@@ -14,7 +18,8 @@ Description
-----------
The LTC2978 is an octal power supply monitor, supervisor, sequencer and
-margin controller.
+margin controller. The LTC3880 is a dual, PolyPhase DC/DC synchronous
+step-down switching regulator controller.
Usage Notes
@@ -43,12 +48,12 @@ in1_min_alarm Input voltage low alarm.
in1_max_alarm Input voltage high alarm.
in1_lcrit_alarm Input voltage critical low alarm.
in1_crit_alarm Input voltage critical high alarm.
-in1_lowest Lowest input voltage.
+in1_lowest Lowest input voltage. LTC2978 only.
in1_highest Highest input voltage.
in1_reset_history Reset history. Writing into this attribute will reset
history for all attributes.
-in[2-9]_label "vout[1-8]".
+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.
@@ -58,21 +63,41 @@ 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.
+in[2-9]_lowest Lowest output voltage. LTC2978 only.
in[2-9]_highest Lowest output voltage.
in[2-9]_reset_history Reset history. Writing into this attribute will reset
history for all attributes.
-temp1_input Measured temperature.
-temp1_min Mimimum temperature.
-temp1_max Maximum temperature.
-temp1_lcrit Critical low temperature.
-temp1_crit Critical high temperature.
-temp1_min_alarm Chip temperature low alarm.
-temp1_max_alarm Chip temperature high alarm.
-temp1_lcrit_alarm Chip temperature critical low alarm.
-temp1_crit_alarm Chip temperature critical high alarm.
-temp1_lowest Lowest measured temperature.
-temp1_highest Highest measured temperature.
-temp1_reset_history Reset history. Writing into this attribute will reset
+temp[1-3]_input Measured temperature.
+ On LTC2978, only one temperature measurement is
+ supported and reflects the internal temperature.
+ On LTC3880, temp1 and temp2 report external
+ temperatures, and temp3 reports the internal
+ temperature.
+temp[1-3]_min Mimimum temperature.
+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 Chip temperature low alarm.
+temp[1-3]_max_alarm Chip temperature high alarm.
+temp[1-3]_lcrit_alarm Chip temperature critical low alarm.
+temp[1-3]_crit_alarm Chip 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 history. Writing into this attribute will reset
history for all attributes.
+
+power[1-2]_label "pout[1-2]". LTC3880 only.
+power[1-2]_input Measured power.
+
+curr1_label "iin". LTC3880 only.
+curr1_input Measured input current.
+curr1_max Maximum input current.
+curr1_max_alarm Input current high alarm.
+
+curr[2-3]_label "iout[1-2]". LTC3880 only.
+curr[2-3]_input Measured input current.
+curr[2-3]_max Maximum input current.
+curr[2-3]_crit Critical input current.
+curr[2-3]_max_alarm Input current high alarm.
+curr[2-3]_crit_alarm Input current critical high alarm.