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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>
This commit is contained in:
Guenter Roeck
64
Documentation/devicetree/bindings/i2c/max6697.txt
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64
Documentation/devicetree/bindings/i2c/max6697.txt
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max6697 properties
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Required properties:
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- compatible:
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Should be one of
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maxim,max6581
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maxim,max6602
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maxim,max6622
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maxim,max6636
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maxim,max6689
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maxim,max6693
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maxim,max6694
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maxim,max6697
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maxim,max6698
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maxim,max6699
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- reg: I2C address
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Optional properties:
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- smbus-timeout-disable
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Set to disable SMBus timeout. If not specified, SMBus timeout will be
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enabled.
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- extended-range-enable
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Only valid for MAX6581. Set to enable extended temperature range.
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Extended temperature will be disabled if not specified.
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- beta-compensation-enable
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Only valid for MAX6693 and MX6694. Set to enable beta compensation on
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remote temperature channel 1.
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Beta compensation will be disabled if not specified.
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- alert-mask
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Alert bit mask. Alert disabled for bits set.
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Select bit 0 for local temperature, bit 1..7 for remote temperatures.
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If not specified, alert will be enabled for all channels.
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- over-temperature-mask
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Over-temperature bit mask. Over-temperature reporting disabled for
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bits set.
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Select bit 0 for local temperature, bit 1..7 for remote temperatures.
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If not specified, over-temperature reporting will be enabled for all
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channels.
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- resistance-cancellation
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Boolean for all chips other than MAX6581. Set to enable resistance
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cancellation on remote temperature channel 1.
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For MAX6581, resistance cancellation enabled for all channels if
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specified as boolean, otherwise as per bit mask specified.
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Only supported for remote temperatures (bit 1..7).
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If not specified, resistance cancellation will be disabled for all
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channels.
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- transistor-ideality
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For MAX6581 only. Two values; first is bit mask, second is ideality
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select value as per MAX6581 data sheet. Select bit 1..7 for remote
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channels.
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Transistor ideality will be initialized to default (1.008) if not
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specified.
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Example:
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temp-sensor@1a {
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compatible = "maxim,max6697";
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reg = <0x1a>;
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smbus-timeout-disable;
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resistance-cancellation;
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alert-mask = <0x72>;
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over-temperature-mask = <0x7f>;
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};
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58
Documentation/hwmon/max6697
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58
Documentation/hwmon/max6697
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Kernel driver max6697
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=====================
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Supported chips:
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* Maxim MAX6581
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Prefix: 'max6581'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6581.pdf
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* Maxim MAX6602
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Prefix: 'max6602'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6602.pdf
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* Maxim MAX6622
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Prefix: 'max6622'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6622.pdf
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* Maxim MAX6636
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Prefix: 'max6636'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6636.pdf
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* Maxim MAX6689
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Prefix: 'max6689'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6689.pdf
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* Maxim MAX6693
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Prefix: 'max6693'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6693.pdf
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* Maxim MAX6694
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Prefix: 'max6694'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6694.pdf
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* Maxim MAX6697
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Prefix: 'max6697'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6697.pdf
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* Maxim MAX6698
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Prefix: 'max6698'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6698.pdf
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* Maxim MAX6699
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Prefix: 'max6699'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6699.pdf
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Author:
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Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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This driver implements support for several MAX6697 compatible temperature sensor
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chips. The chips support one local temperature sensor plus four, six, or seven
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remote temperature sensors. Remote temperature sensors are diode-connected
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thermal transitors, except for MAX6698 which supports three diode-connected
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thermal transistors plus three thermistors in addition to the local temperature
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sensor.
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The driver provides the following sysfs attributes. temp1 is the local (chip)
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temperature, temp[2..n] are remote temperatures. The actually supported
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per-channel attributes are chip type and channel dependent.
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tempX_input RO temperature
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tempX_max RW temperature maximum threshold
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tempX_max_alarm RO temperature maximum threshold alarm
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tempX_crit RW temperature critical threshold
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tempX_crit_alarm RO temperature critical threshold alarm
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tempX_fault RO temperature diode fault (remote sensors only)
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@@ -854,6 +854,17 @@ config SENSORS_MAX6650
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This driver can also be built as a module. If so, the module
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will be called max6650.
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config SENSORS_MAX6697
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tristate "Maxim MAX6697 and compatibles"
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depends on I2C
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help
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If you say yes here you get support for MAX6581, MAX6602, MAX6622,
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MAX6636, MAX6689, MAX6693, MAX6694, MAX6697, MAX6698, and MAX6699
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temperature sensor chips.
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This driver can also be built as a module. If so, the module
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will be called max6697.
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config SENSORS_MCP3021
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tristate "Microchip MCP3021 and compatibles"
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depends on I2C
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@@ -99,6 +99,7 @@ obj-$(CONFIG_SENSORS_MAX197) += max197.o
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obj-$(CONFIG_SENSORS_MAX6639) += max6639.o
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obj-$(CONFIG_SENSORS_MAX6642) += max6642.o
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obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
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obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
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obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
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obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
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obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
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726
drivers/hwmon/max6697.c
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726
drivers/hwmon/max6697.c
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File diff suppressed because it is too large
Load Diff
36
include/linux/platform_data/max6697.h
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36
include/linux/platform_data/max6697.h
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@@ -0,0 +1,36 @@
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/*
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* max6697.h
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* Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef MAX6697_H
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#define MAX6697_H
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#include <linux/types.h>
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/*
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* For all bit masks:
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* bit 0: local temperature
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* bit 1..7: remote temperatures
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*/
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struct max6697_platform_data {
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bool smbus_timeout_disable; /* set to disable SMBus timeouts */
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bool extended_range_enable; /* set to enable extended temp range */
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bool beta_compensation; /* set to enable beta compensation */
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u8 alert_mask; /* set bit to 1 to disable alert */
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u8 over_temperature_mask; /* set bit to 1 to disable */
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u8 resistance_cancellation; /* set bit to 0 to disable
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* bit mask for MAX6581,
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* boolean for other chips
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*/
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u8 ideality_mask; /* set bit to 0 to disable */
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u8 ideality_value; /* transistor ideality as per
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* MAX6581 datasheet
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*/
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};
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#endif /* MAX6697_H */
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