Commit ed99ae74 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: Remove obsolete adm1021 and max6642 drivers 



ADM1021, MAX6642, and compatible chips are supported by the lm90 driver.
Remove the obsolete stand-alone drivers to reduce maintenance overhead.

Reviewed-by: default avatarTzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 04e3bb0b

Documentation/hwmon/adm1021.rst

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Kernel driver adm1021

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



Supported chips:



  * Analog Devices ADM1021



    Prefix: 'adm1021'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the Analog Devices website



  * Analog Devices ADM1021A/ADM1023



    Prefix: 'adm1023'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the Analog Devices website



  * Genesys Logic GL523SM



    Prefix: 'gl523sm'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet:



  * Maxim MAX1617



    Prefix: 'max1617'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the Maxim website



  * Maxim MAX1617A



    Prefix: 'max1617a'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the Maxim website



  * National Semiconductor LM84



    Prefix: 'lm84'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the National Semiconductor website



  * Philips NE1617



    Prefix: 'max1617' (probably detected as a max1617)



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the Philips website



  * Philips NE1617A



    Prefix: 'max1617' (probably detected as a max1617)



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the Philips website



  * TI THMC10



    Prefix: 'thmc10'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the TI website



  * Onsemi MC1066



    Prefix: 'mc1066'



    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e



    Datasheet: Publicly available at the Onsemi website





Authors:

	- Frodo Looijaard <frodol@dds.nl>,

	- Philip Edelbrock <phil@netroedge.com>



Module Parameters

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



* read_only: int

  Don't set any values, read only mode





Description

-----------



The chips supported by this driver are very similar. The Maxim MAX1617 is

the oldest; it has the problem that it is not very well detectable. The

MAX1617A solves that. The ADM1021 is a straight clone of the MAX1617A.

Ditto for the THMC10. From here on, we will refer to all these chips as

ADM1021-clones.



The ADM1021 and MAX1617A reports a die code, which is a sort of revision

code. This can help us pinpoint problems; it is not very useful

otherwise.



ADM1021-clones implement two temperature sensors. One of them is internal,

and measures the temperature of the chip itself; the other is external and

is realised in the form of a transistor-like device. A special alarm

indicates whether the remote sensor is connected.



Each sensor has its own low and high limits. When they are crossed, the

corresponding alarm is set and remains on as long as the temperature stays

out of range. Temperatures are measured in degrees Celsius. Measurements

are possible between -65 and +127 degrees, with a resolution of one degree.



If an alarm triggers, it will remain triggered until the hardware register

is read at least once. This means that the cause for the alarm may already

have disappeared!



This driver only updates its values each 1.5 seconds; reading it more often

will do no harm, but will return 'old' values. It is possible to make

ADM1021-clones do faster measurements, but there is really no good reason

for that.





Netburst-based Xeon support

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



Some Xeon processors based on the Netburst (early Pentium 4, from 2001 to

2003) microarchitecture had real MAX1617, ADM1021, or compatible chips

within them, with two temperature sensors. Other Xeon processors of this

era (with 400 MHz FSB) had chips with only one temperature sensor.



If you have such an old Xeon, and you get two valid temperatures when

loading the adm1021 module, then things are good.



If nothing happens when loading the adm1021 module, and you are certain

that your specific Xeon processor model includes compatible sensors, you

will have to explicitly instantiate the sensor chips from user-space. See

method 4 in Documentation/i2c/instantiating-devices.rst. Possible slave

addresses are 0x18, 0x1a, 0x29, 0x2b, 0x4c, or 0x4e. It is likely that

only temp2 will be correct and temp1 will have to be ignored.



Previous generations of the Xeon processor (based on Pentium II/III)

didn't have these sensors. Next generations of Xeon processors (533 MHz

FSB and faster) lost them, until the Core-based generation which

introduced integrated digital thermal sensors. These are supported by

the coretemp driver.

Documentation/hwmon/index.rst

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@@ -25,7 +25,6 @@ Hardware Monitoring Kernel Drivers 
   acpi_power_meter

   ad7314

   adc128d818

   adm1021

   adm1025

   adm1026

   adm1031
@@ -154,7 +153,6 @@ Hardware Monitoring Kernel Drivers 
   max34440

   max6620

   max6639

   max6642

   max6650

   max6697

   max8688

Documentation/hwmon/max6642.rst

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Kernel driver max6642

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



Supported chips:



  * Maxim MAX6642



    Prefix: 'max6642'



    Addresses scanned: I2C 0x48-0x4f



    Datasheet: Publicly available at the Maxim website



	       http://datasheets.maxim-ic.com/en/ds/MAX6642.pdf



Authors:



	Per Dalen <per.dalen@appeartv.com>



Description

-----------



The MAX6642 is a digital temperature sensor. It senses its own temperature as

well as the temperature on one external diode.



All temperature values are given in degrees Celsius. Resolution

is 0.25 degree for the local temperature and for the remote temperature.

drivers/hwmon/Kconfig

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@@ -105,18 +105,6 @@ config SENSORS_AD7418 
	  This driver can also be built as a module. If so, the module

	  will be called ad7418.



config SENSORS_ADM1021

	tristate "Analog Devices ADM1021 and compatibles"

	depends on I2C

	depends on SENSORS_LM90=n

	help

	  If you say yes here you get support for Analog Devices ADM1021

	  and ADM1023 sensor chips and clones: Maxim MAX1617 and MAX1617A,

	  Genesys Logic GL523SM, National Semiconductor LM84 and TI THMC10.



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

	  will be called adm1021.



config SENSORS_ADM1025

	tristate "Analog Devices ADM1025 and compatibles"

	depends on I2C
@@ -1241,18 +1229,6 @@ config SENSORS_MAX6639 
	  This driver can also be built as a module. If so, the module

	  will be called max6639.



config SENSORS_MAX6642

	tristate "Maxim MAX6642 sensor chip"

	depends on I2C

	depends on SENSORS_LM90=n

	help

	  If you say yes here you get support for MAX6642 sensor chip.

	  MAX6642 is a SMBus-Compatible Remote/Local Temperature Sensor

	  with Overtemperature Alarm from Maxim.



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

	  will be called max6642.



config SENSORS_MAX6650

	tristate "Maxim MAX6650 sensor chip"

	depends on I2C

drivers/hwmon/Makefile

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@@ -31,7 +31,6 @@ obj-$(CONFIG_SENSORS_AD7414) += ad7414.o 
obj-$(CONFIG_SENSORS_AD7418)	+= ad7418.o

obj-$(CONFIG_SENSORS_ADC128D818) += adc128d818.o

obj-$(CONFIG_SENSORS_ADCXX)	+= adcxx.o

obj-$(CONFIG_SENSORS_ADM1021)	+= adm1021.o

obj-$(CONFIG_SENSORS_ADM1025)	+= adm1025.o

obj-$(CONFIG_SENSORS_ADM1026)	+= adm1026.o

obj-$(CONFIG_SENSORS_ADM1029)	+= adm1029.o
@@ -154,7 +153,6 @@ obj-$(CONFIG_SENSORS_MAX31760) += max31760.o 
obj-$(CONFIG_SENSORS_MAX6620)	+= max6620.o

obj-$(CONFIG_SENSORS_MAX6621)	+= max6621.o

obj-$(CONFIG_SENSORS_MAX6639)	+= max6639.o

obj-$(CONFIG_SENSORS_MAX6642)	+= max6642.o

obj-$(CONFIG_SENSORS_MAX6650)	+= max6650.o

obj-$(CONFIG_SENSORS_MAX6697)	+= max6697.o

obj-$(CONFIG_SENSORS_MAX31790)	+= max31790.o