hwmon: (max34440) Add support for MAX34446

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 27 insertions, 2 deletions

diff --git a/Documentation/hwmon/max34440 b/Documentation/hwmon/max34440
index 36b335c461dc..bbdf9bf5d8f5 100644
--- a/Documentation/hwmon/max34440
+++ b/Documentation/hwmon/max34440
@@ -11,6 +11,11 @@ Supported chips:
     Prefixes: 'max34441'
     Addresses scanned: -
     Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34441.pdf
+  * Maxim MAX34446
+    PMBus Power-Supply Data Logger
+    Prefixes: 'max34446'
+    Addresses scanned: -
+    Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34446.pdf
 
 Author: Guenter Roeck <guenter.roeck@ericsson.com>
 
@@ -19,8 +24,8 @@ Description
 -----------
 
 This driver supports hardware montoring for Maxim MAX34440 PMBus 6-Channel
-Power-Supply Manager and MAX34441 PMBus 5-Channel Power-Supply Manager
-and Intelligent Fan Controller.
+Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply Manager
+and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data Logger.
 
 The driver is a client driver to the core PMBus driver. Please see
 Documentation/hwmon/pmbus for details on PMBus client drivers.
@@ -33,6 +38,13 @@ This driver does not auto-detect devices. You will have to instantiate the
 devices explicitly. Please see Documentation/i2c/instantiating-devices for
 details.
 
+For MAX34446, the value of the currX_crit attribute determines if current or
+voltage measurement is enabled for a given channel. Voltage measurement is
+enabled if currX_crit is set to 0; current measurement is enabled if the
+attribute is set to a positive value. Power measurement is only enabled if
+channel 1 (3) is configured for voltage measurement, and channel 2 (4) is
+configured for current measurement.
+
 
 Platform data support
 ---------------------
@@ -60,16 +72,27 @@ in[1-6]_lowest		Historical minimum voltage.
 in[1-6]_highest         Historical maximum voltage.
 in[1-6]_reset_history   Write any value to reset history.
 
+                        MAX34446 only supports in[1-4].
+
 curr[1-6]_label         "iout[1-6]".
 curr[1-6]_input         Measured current. From READ_IOUT register.
 curr[1-6]_max           Maximum current. From IOUT_OC_WARN_LIMIT register.
 curr[1-6]_crit          Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
 curr[1-6]_max_alarm     Current high alarm. From IOUT_OC_WARNING status.
 curr[1-6]_crit_alarm    Current critical high alarm. From IOUT_OC_FAULT status.
+curr[1-4]_average       Historical average current (MAX34446 only).
 curr[1-6]_highest       Historical maximum current.
 curr[1-6]_reset_history Write any value to reset history.
 
                         in6 and curr6 attributes only exist for MAX34440.
+                        MAX34446 only supports curr[1-4].
+
+power[1,3]_label        "pout[1,3]"
+power[1,3]_input        Measured power.
+power[1,3]_average      Historical average power.
+power[1,3]_highest      Historical maximum power.
+
+                        Power attributes only exist for MAX34446.
 
 temp[1-8]_input         Measured temperatures. From READ_TEMPERATURE_1 register.
                         temp1 is the chip's internal temperature. temp2..temp5
@@ -80,7 +103,9 @@ temp[1-8]_max		Maximum temperature. From OT_WARN_LIMIT register.
 temp[1-8]_crit          Critical high temperature. From OT_FAULT_LIMIT register.
 temp[1-8]_max_alarm     Temperature high alarm.
 temp[1-8]_crit_alarm    Temperature critical high alarm.
+temp[1-8]_average       Historical average temperature (MAX34446 only).
 temp[1-8]_highest       Historical maximum temperature.
 temp[1-8]_reset_history Write any value to reset history.
 
                         temp7 and temp8 attributes only exist for MAX34440.
+                        MAX34446 only supports temp[1-3].