hwmon: Driver for Maxim MAX6697 and compatibles
Add support for MAX6581, MAX6602, MAX6622, MAX6636, MAX6689, MAX6693,
MAX6694, MAX6697, MAX6698, and MAX6699 temperature sensors
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
diff --git a/Documentation/devicetree/bindings/i2c/max6697.txt b/Documentation/devicetree/bindings/i2c/max6697.txt
new file mode 100644
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+++ b/Documentation/devicetree/bindings/i2c/max6697.txt
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+max6697 properties
+
+Required properties:
+- compatible:
+ Should be one of
+ maxim,max6581
+ maxim,max6602
+ maxim,max6622
+ maxim,max6636
+ maxim,max6689
+ maxim,max6693
+ maxim,max6694
+ maxim,max6697
+ maxim,max6698
+ maxim,max6699
+- reg: I2C address
+
+Optional properties:
+
+- smbus-timeout-disable
+ Set to disable SMBus timeout. If not specified, SMBus timeout will be
+ enabled.
+- extended-range-enable
+ Only valid for MAX6581. Set to enable extended temperature range.
+ Extended temperature will be disabled if not specified.
+- beta-compensation-enable
+ Only valid for MAX6693 and MX6694. Set to enable beta compensation on
+ remote temperature channel 1.
+ Beta compensation will be disabled if not specified.
+- alert-mask
+ Alert bit mask. Alert disabled for bits set.
+ Select bit 0 for local temperature, bit 1..7 for remote temperatures.
+ If not specified, alert will be enabled for all channels.
+- over-temperature-mask
+ Over-temperature bit mask. Over-temperature reporting disabled for
+ bits set.
+ Select bit 0 for local temperature, bit 1..7 for remote temperatures.
+ If not specified, over-temperature reporting will be enabled for all
+ channels.
+- resistance-cancellation
+ Boolean for all chips other than MAX6581. Set to enable resistance
+ cancellation on remote temperature channel 1.
+ For MAX6581, resistance cancellation enabled for all channels if
+ specified as boolean, otherwise as per bit mask specified.
+ Only supported for remote temperatures (bit 1..7).
+ If not specified, resistance cancellation will be disabled for all
+ channels.
+- transistor-ideality
+ For MAX6581 only. Two values; first is bit mask, second is ideality
+ select value as per MAX6581 data sheet. Select bit 1..7 for remote
+ channels.
+ Transistor ideality will be initialized to default (1.008) if not
+ specified.
+
+Example:
+
+temp-sensor@1a {
+ compatible = "maxim,max6697";
+ reg = <0x1a>;
+ smbus-timeout-disable;
+ resistance-cancellation;
+ alert-mask = <0x72>;
+ over-temperature-mask = <0x7f>;
+};
diff --git a/Documentation/hwmon/max6697 b/Documentation/hwmon/max6697
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+++ b/Documentation/hwmon/max6697
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+Kernel driver max6697
+=====================
+
+Supported chips:
+ * Maxim MAX6581
+ Prefix: 'max6581'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6581.pdf
+ * Maxim MAX6602
+ Prefix: 'max6602'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6602.pdf
+ * Maxim MAX6622
+ Prefix: 'max6622'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6622.pdf
+ * Maxim MAX6636
+ Prefix: 'max6636'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6636.pdf
+ * Maxim MAX6689
+ Prefix: 'max6689'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6689.pdf
+ * Maxim MAX6693
+ Prefix: 'max6693'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6693.pdf
+ * Maxim MAX6694
+ Prefix: 'max6694'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6694.pdf
+ * Maxim MAX6697
+ Prefix: 'max6697'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6697.pdf
+ * Maxim MAX6698
+ Prefix: 'max6698'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6698.pdf
+ * Maxim MAX6699
+ Prefix: 'max6699'
+ Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6699.pdf
+
+Author:
+ Guenter Roeck <linux@roeck-us.net>
+
+Description
+-----------
+
+This driver implements support for several MAX6697 compatible temperature sensor
+chips. The chips support one local temperature sensor plus four, six, or seven
+remote temperature sensors. Remote temperature sensors are diode-connected
+thermal transitors, except for MAX6698 which supports three diode-connected
+thermal transistors plus three thermistors in addition to the local temperature
+sensor.
+
+The driver provides the following sysfs attributes. temp1 is the local (chip)
+temperature, temp[2..n] are remote temperatures. The actually supported
+per-channel attributes are chip type and channel dependent.
+
+tempX_input RO temperature
+tempX_max RW temperature maximum threshold
+tempX_max_alarm RO temperature maximum threshold alarm
+tempX_crit RW temperature critical threshold
+tempX_crit_alarm RO temperature critical threshold alarm
+tempX_fault RO temperature diode fault (remote sensors only)