hwmon: (ltc2978) Add support for LTC2975

LTC2975 is mostly compatible to LTC2974, but supports input current
and power measurement.

Tested-by: Michael Jones <mike@proclivis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 27 insertions, 20 deletions

diff --git a/Documentation/hwmon/ltc2978 b/Documentation/hwmon/ltc2978
index ff130997f22e..7e982884e359 100644
--- a/Documentation/hwmon/ltc2978
+++ b/Documentation/hwmon/ltc2978
@@ -6,6 +6,10 @@ Supported chips:
     Prefix: 'ltc2974'
     Addresses scanned: -
     Datasheet: http://www.linear.com/product/ltc2974
+  * Linear Technology LTC2975
+    Prefix: 'ltc2975'
+    Addresses scanned: -
+    Datasheet: http://www.linear.com/product/ltc2975
   * Linear Technology LTC2977
     Prefix: 'ltc2977'
     Addresses scanned: -
@@ -42,7 +46,7 @@ Author: Guenter Roeck <linux@roeck-us.net>
 Description
 -----------
 
-LTC2974 is a quad digital power supply managers.
+LTC2974 and LTC2975 are quad digital power supply managers.
 LTC2978 is an octal power supply monitor.
 LTC2977 is a pin compatible replacement for LTC2978.
 LTC3880, LTC3882, and LTC3887 are dual output poly-phase step-down DC/DC
@@ -71,23 +75,23 @@ in1_label		"vin"
 in1_input               Measured input voltage.
 in1_min                 Minimum input voltage.
 in1_max                 Maximum input voltage.
-                        LTC2974, LTC2977, and LTC2978 only.
+                        LTC2974, LTC2975, LTC2977, and LTC2978 only.
 in1_lcrit               Critical minimum input voltage.
-                        LTC2974, LTC2977, and LTC2978 only.
+                        LTC2974, LTC2975, LTC2977, and LTC2978 only.
 in1_crit                Critical maximum input voltage.
 in1_min_alarm           Input voltage low alarm.
 in1_max_alarm           Input voltage high alarm.
-                        LTC2974, LTC2977, and LTC2978 only.
+                        LTC2974, LTC2975, LTC2977, and LTC2978 only.
 in1_lcrit_alarm         Input voltage critical low alarm.
-                        LTC2974, LTC2977, and LTC2978 only.
+                        LTC2974, LTC2975, LTC2977, and LTC2978 only.
 in1_crit_alarm          Input voltage critical high alarm.
 in1_lowest              Lowest input voltage.
-                        LTC2974, LTC2977, and LTC2978 only.
+                        LTC2974, LTC2975, LTC2977, and LTC2978 only.
 in1_highest             Highest input voltage.
 in1_reset_history       Reset input voltage history.
 
 in[N]_label             "vout[1-8]".
-                        LTC2974: N=2-5
+                        LTC2974, LTC2975: N=2-5
                         LTC2977: N=2-9
                         LTC2978: N=2-9
                         LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
@@ -101,13 +105,14 @@ 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]_lowest            Lowest output voltage. LTC2974, LTC2975,
+                        and LTC2978 only.
 in[N]_highest           Highest output voltage.
 in[N]_reset_history     Reset output voltage history.
 
 temp[N]_input           Measured temperature.
-                        On LTC2974, temp[1-4] report external temperatures,
-                        and temp5 reports the chip temperature.
+                        On LTC2974 and LTC2975, temp[1-4] report external
+                        temperatures, and temp5 reports the chip temperature.
                         On LTC2977 and LTC2978, only one temperature measurement
                         is supported and reports the chip temperature.
                         On LTC3880, LTC3882, LTC3887, and LTM4676, temp1 and
@@ -120,23 +125,24 @@ 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, LTC2977, and LTC2978 only.
+                        LTC2974, LTC2975, LTC2977, 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, LTC2977, and LTC2978 only.
-                        Not supported for chip temperature sensor on LTC2974.
+                        LTC2974, LTC2975, LTC2977, and LTC2978 only.
+                        Not supported for chip temperature sensor on LTC2974 and
+                        LTC2975.
 temp[N]_highest         Highest measured temperature. Not supported for chip
-                        temperature sensor on LTC2974.
+                        temperature sensor on LTC2974 and LTC2975.
 temp[N]_reset_history   Reset temperature history. Not supported for chip
-                        temperature sensor on LTC2974.
+                        temperature sensor on LTC2974 and LTC2975.
 
 power1_label            "pin". LTC3883 only.
 power1_input            Measured input power.
 
 power[N]_label          "pout[1-4]".
-                        LTC2974: N=1-4
+                        LTC2974, LTC2975: N=1-4
                         LTC2977: Not supported
                         LTC2978: Not supported
                         LTC3880, LTC3882, LTC3887, LTM4676: N=1-2
@@ -151,7 +157,7 @@ curr1_highest		Highest input current. LTC3883 only.
 curr1_reset_history     Reset input current history. LTC3883 only.
 
 curr[N]_label           "iout[1-4]".
-                        LTC2974: N=1-4
+                        LTC2974, LTC2975: N=1-4
                         LTC2977: not supported
                         LTC2978: not supported
                         LTC3880, LTC3882, LTC3887, LTM4676: N=2-3
@@ -159,10 +165,11 @@ curr[N]_label		"iout[1-4]".
 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]_lcrit           Critical low output current. LTC2974 and LTC2975 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]_lcrit_alarm     Output current critical low alarm.
+                        LTC2974 and LTC2975 only.
+curr[N]_lowest          Lowest output current. LTC2974 and LTC2975 only.
 curr[N]_highest         Highest output current.
 curr[N]_reset_history   Reset output current history.