hwmon: Driver for MAX16065 System Manager and compatibles

This patch adds hardware monitoring support for Maxim MAX16065, MAX16066,
MAX16067, MAX16068, MAX16070, and MAX16071 flash-configurable system managers
with nonvolatile fault registers.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>

Documentation/hwmon/max16065

+Kernel driver max16065
+======================
+
+Supported chips:
+  * Maxim MAX16065, MAX16066
+    Prefixes: 'max16065', 'max16066'
+    Addresses scanned: -
+    Datasheet:
+	http://datasheets.maxim-ic.com/en/ds/MAX16065-MAX16066.pdf
+ *  Maxim MAX16067
+    Prefix: 'max16067'
+    Addresses scanned: -
+    Datasheet:
+	http://datasheets.maxim-ic.com/en/ds/MAX16067.pdf
+ *  Maxim MAX16068
+    Prefix: 'max16068'
+    Addresses scanned: -
+    Datasheet:
+	http://datasheets.maxim-ic.com/en/ds/MAX16068.pdf
+ *  Maxim MAX16070/MAX16071
+    Prefixes: 'max16070', 'max16071'
+    Addresses scanned: -
+    Datasheet:
+	http://datasheets.maxim-ic.com/en/ds/MAX16070-MAX16071.pdf
+
+
+Author: Guenter Roeck <guenter.roeck@ericsson.com>
+
+
+Description
+-----------
+
+[From datasheets] The MAX16065/MAX16066 flash-configurable system managers
+monitor and sequence multiple system voltages. The MAX16065/MAX16066 can also
+accurately monitor (+/-2.5%) one current channel using a dedicated high-side
+current-sense amplifier. The MAX16065 manages up to twelve system voltages
+simultaneously, and the MAX16066 manages up to eight supply voltages.
+
+The MAX16067 flash-configurable system manager monitors and sequences multiple
+system voltages. The MAX16067 manages up to six system voltages simultaneously.
+
+The MAX16068 flash-configurable system manager monitors and manages up to six
+system voltages simultaneously.
+
+The MAX16070/MAX16071 flash-configurable system monitors supervise multiple
+system voltages. The MAX16070/MAX16071 can also accurately monitor (+/-2.5%)
+one current channel using a dedicated high-side current-sense amplifier. The
+MAX16070 monitors up to twelve system voltages simultaneously, and the MAX16071
+monitors up to eight supply voltages.
+
+Each monitored channel has its own low and high critical limits. MAX16065,
+MAX16066, MAX16070, and MAX16071 support an additional limit which is
+configurable as either low or high secondary limit. MAX16065, MAX16066,
+MAX16070, and MAX16071 also support supply current monitoring.
+
+
+Usage Notes
+-----------
+
+This driver does not probe for devices, since there is no register which
+can be safely used to identify the chip. You will have to instantiate
+the devices explicitly. Please see Documentation/i2c/instantiating-devices for
+details.
+
+
+Sysfs entries
+-------------
+
+in[0-11]_input		Input voltage measurements.
+
+in12_input		Voltage on CSP (Current Sense Positive) pin.
+			Only if the chip supports current sensing and if
+			current sensing is enabled.
+
+in[0-11]_min		Low warning limit.
+			Supported on MAX16065, MAX16066, MAX16070, and MAX16071
+			only.
+
+in[0-11]_max		High warning limit.
+			Supported on MAX16065, MAX16066, MAX16070, and MAX16071
+			only.
+
+			Either low or high warning limits are supported
+			(depending on chip configuration), but not both.
+
+in[0-11]_lcrit		Low critical limit.
+
+in[0-11]_crit		High critical limit.
+
+in[0-11]_alarm		Input voltage alarm.
+
+curr1_input		Current sense input; only if the chip supports current
+			sensing and if current sensing is enabled.
+			Displayed current assumes 0.001 Ohm current sense
+			resistor.
+
+curr1_alarm		Overcurrent alarm; only if the chip supports current
+			sensing and if current sensing is enabled.

drivers/hwmon/Kconfig

@@ -708,6 +708,22 @@ config SENSORS_MAX1111
 	  This driver can also be built as a module.  If so, the module
 	  will be called max1111.
 
+config SENSORS_MAX16065
+	tristate "Maxim MAX16065 System Manager and compatibles"
+	depends on I2C
+	help
+	  If you say yes here you get support for hardware monitoring
+	  capabilities of the following Maxim System Manager chips.
+	    MAX16065
+	    MAX16066
+	    MAX16067
+	    MAX16068
+	    MAX16070
+	    MAX16071
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called max16065.
+
 config SENSORS_MAX1619
 	tristate "Maxim MAX1619 sensor chip"
 	depends on I2C

drivers/hwmon/Makefile

@@ -83,6 +83,7 @@ obj-$(CONFIG_SENSORS_LTC4215)	+= ltc4215.o
 obj-$(CONFIG_SENSORS_LTC4245)	+= ltc4245.o
 obj-$(CONFIG_SENSORS_LTC4261)	+= ltc4261.o
 obj-$(CONFIG_SENSORS_MAX1111)	+= max1111.o
+obj-$(CONFIG_SENSORS_MAX16065)	+= max16065.o
 obj-$(CONFIG_SENSORS_MAX1619)	+= max1619.o
 obj-$(CONFIG_SENSORS_MAX6639)	+= max6639.o
 obj-$(CONFIG_SENSORS_MAX6642)	+= max6642.o