hwmon: (pmbus) Add support for MAX20751

MAX20751 is a multiphase power controller with internal buck converter.
It uses VR12.0 to report the output voltage. This requires an explicit
driver, since the VR version can not be auto-detected.

The chip supports a manufacturer specific command to fine-tune the output
voltage.  This command is not currently supported.

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

diff --git a/Documentation/hwmon/max20751 b/Documentation/hwmon/max20751
new file mode 100644 (file)
index 0000000..f9fa25e
--- /dev/null
+++ b/Documentation/hwmon/max20751
@@ -0,0 +1,77 @@
+Kernel driver max20751
+======================
+
+Supported chips:
+  * maxim MAX20751
+    Prefix: 'max20751'
+    Addresses scanned: -
+    Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX20751.pdf
+    Application note: http://pdfserv.maximintegrated.com/en/an/AN5941.pdf
+
+Author: Guenter Roeck <linux@roeck-us.net>
+
+
+Description
+-----------
+
+This driver supports MAX20751 Multiphase Master with PMBus Interface
+and Internal Buck Converter.
+
+The driver is a client driver to the core PMBus driver.
+Please see Documentation/hwmon/pmbus for details on PMBus client drivers.
+
+
+Usage Notes
+-----------
+
+This driver does not auto-detect devices. You will have to instantiate the
+devices explicitly. Please see Documentation/i2c/instantiating-devices for
+details.
+
+
+Platform data support
+---------------------
+
+The driver supports standard PMBus driver platform data.
+
+
+Sysfs entries
+-------------
+
+The following attributes are supported.
+
+in1_label              "vin1"
+in1_input              Measured voltage.
+in1_min                        Minimum input voltage.
+in1_max                        Maximum input voltage.
+in1_lcrit              Critical minimum input voltage.
+in1_crit               Critical maximum input voltage.
+in1_min_alarm          Input voltage low alarm.
+in1_lcrit_alarm                Input voltage critical low alarm.
+in1_min_alarm          Input voltage low alarm.
+in1_max_alarm          Input voltage high alarm.
+
+in2_label              "vout1"
+in2_input              Measured voltage.
+in2_min                        Minimum output voltage.
+in2_max                        Maximum output voltage.
+in2_lcrit              Critical minimum output voltage.
+in2_crit               Critical maximum output voltage.
+in2_min_alarm          Output voltage low alarm.
+in2_lcrit_alarm                Output voltage critical low alarm.
+in2_min_alarm          Output voltage low alarm.
+in2_max_alarm          Output voltage high alarm.
+
+curr1_input            Measured output current.
+curr1_label            "iout1"
+curr1_max              Maximum output current.
+curr1_alarm            Current high alarm.
+
+temp1_input            Measured temperature.
+temp1_max              Maximum temperature.
+temp1_crit             Critical high temperature.
+temp1_max_alarm                Chip temperature high alarm.
+temp1_crit_alarm       Chip temperature critical high alarm.
+
+power1_input           Output power.
+power1_label           "pout1"

diff --git a/MAINTAINERS b/MAINTAINERS
index a9ae6c1..6a406b6 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6539,6 +6539,13 @@ S:       Maintained
 F:     Documentation/hwmon/max16065
 F:     drivers/hwmon/max16065.c
 
+MAX20751 HARDWARE MONITOR DRIVER
+M:     Guenter Roeck <linux@roeck-us.net>
+L:     lm-sensors@lm-sensors.org
+S:     Maintained
+F:     Documentation/hwmon/max20751
+F:     drivers/hwmon/max20751.c
+
 MAX6650 HARDWARE MONITOR AND FAN CONTROLLER DRIVER
 M:     "Hans J. Koch" <hjk@hansjkoch.de>
 L:     lm-sensors@lm-sensors.org

diff --cc drivers/hwmon/pmbus/Kconfig
Simple merge

diff --cc drivers/hwmon/pmbus/Makefile
Simple merge

diff --cc drivers/hwmon/pmbus/max20751.c
Simple merge