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Commit 8c22a8f5 authored by Dirk Eibach's avatar Dirk Eibach Committed by Jean Delvare
Browse files

hwmon: Add support for Texas Instruments ADS1015 



Signed-off-by: default avatarDirk Eibach <eibach@gdsys.de>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent a98d506c

Documentation/devicetree/bindings/hwmon/ads1015.txt

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ADS1015 (I2C)



This device is a 12-bit A-D converter with 4 inputs.



The inputs can be used single ended or in certain differential combinations.



For configuration all possible combinations are mapped to 8 channels:

0: Voltage over AIN0 and AIN1.

1: Voltage over AIN0 and AIN3.

2: Voltage over AIN1 and AIN3.

3: Voltage over AIN2 and AIN3.

4: Voltage over AIN0 and GND.

5: Voltage over AIN1 and GND.

6: Voltage over AIN2 and GND.

7: Voltage over AIN3 and GND.



Optional properties:



 - exported-channels : exported_channels is a bitmask that specifies which

		       channels should be accessable by the user.



Example:

ads1015@49 {

	compatible = "ti,ads1015";

	reg = <0x49>;

	exported-channels = <0x14>;

};



In this example only channel 2 and 4 would be accessable by the user.

Documentation/hwmon/ads1015

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Kernel driver ads1015

=====================



Supported chips:

  * Texas Instruments ADS1015

    Prefix: 'ads1015'

    Datasheet: Publicly available at the Texas Instruments website :

               http://focus.ti.com/lit/ds/symlink/ads1015.pdf



Authors:

        Dirk Eibach, Guntermann & Drunck GmbH <eibach@gdsys.de>



Description

-----------



This driver implements support for the Texas Instruments ADS1015.



This device is a 12-bit A-D converter with 4 inputs.



The inputs can be used single ended or in certain differential combinations.



The inputs can be exported to 8 sysfs input files in0_input - in7_input:

in0: Voltage over AIN0 and AIN1.

in1: Voltage over AIN0 and AIN3.

in2: Voltage over AIN1 and AIN3.

in3: Voltage over AIN2 and AIN3.

in4: Voltage over AIN0 and GND.

in5: Voltage over AIN1 and GND.

in6: Voltage over AIN2 and GND.

in7: Voltage over AIN3 and GND.



Which inputs are exported can be configured using platform data or devicetree.



By default all inputs are exported.



Platform Data

-------------



In linux/i2c/ads1015.h platform data is defined as:



struct ads1015_platform_data {

	unsigned int exported_channels;

};



exported_channels is a bitmask that specifies which inputs should be exported.



Example:

struct ads1015_platform_data data = {

	.exported_channels = (1 << 2) | (1 << 4)

};



In this case only in2_input and in4_input would be created.



Devicetree

----------



The ads1015 node may have an "exported-channels" property.

exported_channels is a bitmask that specifies which inputs should be exported.



Example:

ads1015@49 {

	compatible = "ti,ads1015";

	reg = <0x49>;

	exported-channels = < 0x14 >;

};



In this case only in2_input and in4_input would be created.

MAINTAINERS

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@@ -365,6 +365,14 @@ W: http://wiki-analog.com/ADP8860 
S:	Supported

F:	drivers/video/backlight/adp8860_bl.c



ADS1015 HARDWARE MONITOR DRIVER

M:	Dirk Eibach <eibach@gdsys.de>

L:	lm-sensors@lm-sensors.org

S:	Maintained

F:	Documentation/hwmon/ads1015

F:	drivers/hwmon/ads1015.c

F:	include/linux/i2c/ads1015.h



ADT746X FAN DRIVER

M:	Colin Leroy <colin@colino.net>

S:	Maintained

drivers/hwmon/Kconfig

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@@ -968,6 +968,16 @@ config SENSORS_SCH5627 
	  This driver can also be built as a module.  If so, the module

	  will be called sch5627.



config SENSORS_ADS1015

	tristate "Texas Instruments ADS1015"

	depends on I2C

	help

	  If you say yes here you get support for Texas Instruments ADS1015

	  12-bit 4-input ADC device.



	  This driver can also be built as a module.  If so, the module

	  will be called ads1015.



config SENSORS_ADS7828

	tristate "Texas Instruments ADS7828"

	depends on I2C

drivers/hwmon/Makefile

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@@ -29,6 +29,7 @@ obj-$(CONFIG_SENSORS_ADM1026) += adm1026.o 
obj-$(CONFIG_SENSORS_ADM1029)	+= adm1029.o

obj-$(CONFIG_SENSORS_ADM1031)	+= adm1031.o

obj-$(CONFIG_SENSORS_ADM9240)	+= adm9240.o

obj-$(CONFIG_SENSORS_ADS1015)	+= ads1015.o

obj-$(CONFIG_SENSORS_ADS7828)	+= ads7828.o

obj-$(CONFIG_SENSORS_ADS7871)	+= ads7871.o

obj-$(CONFIG_SENSORS_ADT7411)	+= adt7411.o