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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: Tzung-Bi Shih <tzungbi@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
parent
04e3bb0b00
commit
ed99ae74f2
@ -1,153 +0,0 @@
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Kernel driver adm1021
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=====================
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Supported chips:
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* Analog Devices ADM1021
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Prefix: 'adm1021'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the Analog Devices website
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* Analog Devices ADM1021A/ADM1023
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Prefix: 'adm1023'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the Analog Devices website
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* Genesys Logic GL523SM
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Prefix: 'gl523sm'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet:
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* Maxim MAX1617
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Prefix: 'max1617'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the Maxim website
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* Maxim MAX1617A
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Prefix: 'max1617a'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the Maxim website
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* National Semiconductor LM84
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Prefix: 'lm84'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the National Semiconductor website
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* Philips NE1617
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Prefix: 'max1617' (probably detected as a max1617)
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the Philips website
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* Philips NE1617A
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Prefix: 'max1617' (probably detected as a max1617)
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the Philips website
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* TI THMC10
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Prefix: 'thmc10'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the TI website
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* Onsemi MC1066
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Prefix: 'mc1066'
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Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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Datasheet: Publicly available at the Onsemi website
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Authors:
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- Frodo Looijaard <frodol@dds.nl>,
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- Philip Edelbrock <phil@netroedge.com>
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Module Parameters
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-----------------
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* read_only: int
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Don't set any values, read only mode
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Description
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-----------
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The chips supported by this driver are very similar. The Maxim MAX1617 is
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the oldest; it has the problem that it is not very well detectable. The
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MAX1617A solves that. The ADM1021 is a straight clone of the MAX1617A.
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Ditto for the THMC10. From here on, we will refer to all these chips as
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ADM1021-clones.
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The ADM1021 and MAX1617A reports a die code, which is a sort of revision
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code. This can help us pinpoint problems; it is not very useful
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otherwise.
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ADM1021-clones implement two temperature sensors. One of them is internal,
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and measures the temperature of the chip itself; the other is external and
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is realised in the form of a transistor-like device. A special alarm
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indicates whether the remote sensor is connected.
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Each sensor has its own low and high limits. When they are crossed, the
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corresponding alarm is set and remains on as long as the temperature stays
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out of range. Temperatures are measured in degrees Celsius. Measurements
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are possible between -65 and +127 degrees, with a resolution of one degree.
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If an alarm triggers, it will remain triggered until the hardware register
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is read at least once. This means that the cause for the alarm may already
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have disappeared!
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This driver only updates its values each 1.5 seconds; reading it more often
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will do no harm, but will return 'old' values. It is possible to make
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ADM1021-clones do faster measurements, but there is really no good reason
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for that.
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Netburst-based Xeon support
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---------------------------
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Some Xeon processors based on the Netburst (early Pentium 4, from 2001 to
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2003) microarchitecture had real MAX1617, ADM1021, or compatible chips
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within them, with two temperature sensors. Other Xeon processors of this
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era (with 400 MHz FSB) had chips with only one temperature sensor.
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If you have such an old Xeon, and you get two valid temperatures when
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loading the adm1021 module, then things are good.
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If nothing happens when loading the adm1021 module, and you are certain
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that your specific Xeon processor model includes compatible sensors, you
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will have to explicitly instantiate the sensor chips from user-space. See
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method 4 in Documentation/i2c/instantiating-devices.rst. Possible slave
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addresses are 0x18, 0x1a, 0x29, 0x2b, 0x4c, or 0x4e. It is likely that
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only temp2 will be correct and temp1 will have to be ignored.
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Previous generations of the Xeon processor (based on Pentium II/III)
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didn't have these sensors. Next generations of Xeon processors (533 MHz
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FSB and faster) lost them, until the Core-based generation which
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introduced integrated digital thermal sensors. These are supported by
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the coretemp driver.
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@ -25,7 +25,6 @@ Hardware Monitoring Kernel Drivers
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acpi_power_meter
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ad7314
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adc128d818
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adm1021
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adm1025
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adm1026
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adm1031
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@ -154,7 +153,6 @@ Hardware Monitoring Kernel Drivers
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max34440
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max6620
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max6639
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max6642
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max6650
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max6697
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max8688
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@ -1,27 +0,0 @@
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Kernel driver max6642
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=====================
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Supported chips:
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* Maxim MAX6642
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Prefix: 'max6642'
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Addresses scanned: I2C 0x48-0x4f
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Datasheet: Publicly available at the Maxim website
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http://datasheets.maxim-ic.com/en/ds/MAX6642.pdf
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Authors:
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Per Dalen <per.dalen@appeartv.com>
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Description
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-----------
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The MAX6642 is a digital temperature sensor. It senses its own temperature as
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well as the temperature on one external diode.
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All temperature values are given in degrees Celsius. Resolution
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is 0.25 degree for the local temperature and for the remote temperature.
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@ -105,18 +105,6 @@ config SENSORS_AD7418
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This driver can also be built as a module. If so, the module
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will be called ad7418.
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config SENSORS_ADM1021
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tristate "Analog Devices ADM1021 and compatibles"
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depends on I2C
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depends on SENSORS_LM90=n
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help
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If you say yes here you get support for Analog Devices ADM1021
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and ADM1023 sensor chips and clones: Maxim MAX1617 and MAX1617A,
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Genesys Logic GL523SM, National Semiconductor LM84 and TI THMC10.
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This driver can also be built as a module. If so, the module
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will be called adm1021.
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config SENSORS_ADM1025
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tristate "Analog Devices ADM1025 and compatibles"
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depends on I2C
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@ -1241,18 +1229,6 @@ config SENSORS_MAX6639
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This driver can also be built as a module. If so, the module
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will be called max6639.
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config SENSORS_MAX6642
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tristate "Maxim MAX6642 sensor chip"
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depends on I2C
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depends on SENSORS_LM90=n
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help
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If you say yes here you get support for MAX6642 sensor chip.
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MAX6642 is a SMBus-Compatible Remote/Local Temperature Sensor
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with Overtemperature Alarm from Maxim.
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This driver can also be built as a module. If so, the module
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will be called max6642.
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config SENSORS_MAX6650
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tristate "Maxim MAX6650 sensor chip"
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depends on I2C
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@ -31,7 +31,6 @@ obj-$(CONFIG_SENSORS_AD7414) += ad7414.o
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obj-$(CONFIG_SENSORS_AD7418) += ad7418.o
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obj-$(CONFIG_SENSORS_ADC128D818) += adc128d818.o
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obj-$(CONFIG_SENSORS_ADCXX) += adcxx.o
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obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o
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obj-$(CONFIG_SENSORS_ADM1025) += adm1025.o
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obj-$(CONFIG_SENSORS_ADM1026) += adm1026.o
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obj-$(CONFIG_SENSORS_ADM1029) += adm1029.o
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@ -154,7 +153,6 @@ obj-$(CONFIG_SENSORS_MAX31760) += max31760.o
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obj-$(CONFIG_SENSORS_MAX6620) += max6620.o
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obj-$(CONFIG_SENSORS_MAX6621) += max6621.o
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obj-$(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_MAX31790) += max31790.o
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@ -1,503 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
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* Philip Edelbrock <phil@netroedge.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = {
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0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
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enum chips {
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adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066 };
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/* adm1021 constants specified below */
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/* The adm1021 registers */
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/* Read-only */
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/* For nr in 0-1 */
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#define ADM1021_REG_TEMP(nr) (nr)
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#define ADM1021_REG_STATUS 0x02
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/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
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#define ADM1021_REG_MAN_ID 0xFE
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/* ADM1021 = 0x0X, ADM1023 = 0x3X */
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#define ADM1021_REG_DEV_ID 0xFF
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/* These use different addresses for reading/writing */
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#define ADM1021_REG_CONFIG_R 0x03
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#define ADM1021_REG_CONFIG_W 0x09
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#define ADM1021_REG_CONV_RATE_R 0x04
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#define ADM1021_REG_CONV_RATE_W 0x0A
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/* These are for the ADM1023's additional precision on the remote temp sensor */
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#define ADM1023_REG_REM_TEMP_PREC 0x10
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#define ADM1023_REG_REM_OFFSET 0x11
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#define ADM1023_REG_REM_OFFSET_PREC 0x12
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#define ADM1023_REG_REM_TOS_PREC 0x13
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#define ADM1023_REG_REM_THYST_PREC 0x14
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/* limits */
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/* For nr in 0-1 */
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#define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr))
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#define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr))
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#define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr))
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#define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr))
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/* write-only */
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#define ADM1021_REG_ONESHOT 0x0F
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/* Initial values */
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/*
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* Note: Even though I left the low and high limits named os and hyst,
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* they don't quite work like a thermostat the way the LM75 does. I.e.,
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* a lower temp than THYST actually triggers an alarm instead of
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* clearing it. Weird, ey? --Phil
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*/
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/* Each client has this additional data */
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struct adm1021_data {
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struct i2c_client *client;
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enum chips type;
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const struct attribute_group *groups[3];
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struct mutex update_lock;
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bool valid; /* true if following fields are valid */
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char low_power; /* !=0 if device in low power mode */
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unsigned long last_updated; /* In jiffies */
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int temp_max[2]; /* Register values */
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int temp_min[2];
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int temp[2];
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u8 alarms;
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/* Special values for ADM1023 only */
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u8 remote_temp_offset;
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u8 remote_temp_offset_prec;
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};
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/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
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static bool read_only;
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static struct adm1021_data *adm1021_update_device(struct device *dev)
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{
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struct adm1021_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
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|| !data->valid) {
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int i;
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dev_dbg(dev, "Starting adm1021 update\n");
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for (i = 0; i < 2; i++) {
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data->temp[i] = 1000 *
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(s8) i2c_smbus_read_byte_data(
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client, ADM1021_REG_TEMP(i));
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data->temp_max[i] = 1000 *
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(s8) i2c_smbus_read_byte_data(
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client, ADM1021_REG_TOS_R(i));
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if (data->type != lm84) {
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data->temp_min[i] = 1000 *
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(s8) i2c_smbus_read_byte_data(client,
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ADM1021_REG_THYST_R(i));
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}
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}
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data->alarms = i2c_smbus_read_byte_data(client,
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ADM1021_REG_STATUS) & 0x7c;
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if (data->type == adm1023) {
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/*
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* The ADM1023 provides 3 extra bits of precision for
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* the remote sensor in extra registers.
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*/
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data->temp[1] += 125 * (i2c_smbus_read_byte_data(
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client, ADM1023_REG_REM_TEMP_PREC) >> 5);
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data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
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client, ADM1023_REG_REM_TOS_PREC) >> 5);
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data->temp_min[1] += 125 * (i2c_smbus_read_byte_data(
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client, ADM1023_REG_REM_THYST_PREC) >> 5);
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data->remote_temp_offset =
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i2c_smbus_read_byte_data(client,
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ADM1023_REG_REM_OFFSET);
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data->remote_temp_offset_prec =
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i2c_smbus_read_byte_data(client,
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ADM1023_REG_REM_OFFSET_PREC);
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}
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data->last_updated = jiffies;
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data->valid = true;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct adm1021_data *data = adm1021_update_device(dev);
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return sprintf(buf, "%d\n", data->temp[index]);
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}
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static ssize_t temp_max_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct adm1021_data *data = adm1021_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_max[index]);
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}
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static ssize_t temp_min_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct adm1021_data *data = adm1021_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_min[index]);
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}
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static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct adm1021_data *data = adm1021_update_device(dev);
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return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
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}
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static ssize_t alarms_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct adm1021_data *data = adm1021_update_device(dev);
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return sprintf(buf, "%u\n", data->alarms);
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}
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static ssize_t temp_max_store(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct adm1021_data *data = dev_get_drvdata(dev);
|
||||
struct i2c_client *client = data->client;
|
||||
long temp;
|
||||
int reg_val, err;
|
||||
|
||||
err = kstrtol(buf, 10, &temp);
|
||||
if (err)
|
||||
return err;
|
||||
temp /= 1000;
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
reg_val = clamp_val(temp, -128, 127);
|
||||
data->temp_max[index] = reg_val * 1000;
|
||||
if (!read_only)
|
||||
i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
|
||||
reg_val);
|
||||
mutex_unlock(&data->update_lock);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t temp_min_store(struct device *dev,
|
||||
struct device_attribute *devattr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
int index = to_sensor_dev_attr(devattr)->index;
|
||||
struct adm1021_data *data = dev_get_drvdata(dev);
|
||||
struct i2c_client *client = data->client;
|
||||
long temp;
|
||||
int reg_val, err;
|
||||
|
||||
err = kstrtol(buf, 10, &temp);
|
||||
if (err)
|
||||
return err;
|
||||
temp /= 1000;
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
reg_val = clamp_val(temp, -128, 127);
|
||||
data->temp_min[index] = reg_val * 1000;
|
||||
if (!read_only)
|
||||
i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
|
||||
reg_val);
|
||||
mutex_unlock(&data->update_lock);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t low_power_show(struct device *dev,
|
||||
struct device_attribute *devattr, char *buf)
|
||||
{
|
||||
struct adm1021_data *data = adm1021_update_device(dev);
|
||||
return sprintf(buf, "%d\n", data->low_power);
|
||||
}
|
||||
|
||||
static ssize_t low_power_store(struct device *dev,
|
||||
struct device_attribute *devattr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct adm1021_data *data = dev_get_drvdata(dev);
|
||||
struct i2c_client *client = data->client;
|
||||
char low_power;
|
||||
unsigned long val;
|
||||
int err;
|
||||
|
||||
err = kstrtoul(buf, 10, &val);
|
||||
if (err)
|
||||
return err;
|
||||
low_power = val != 0;
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
if (low_power != data->low_power) {
|
||||
int config = i2c_smbus_read_byte_data(
|
||||
client, ADM1021_REG_CONFIG_R);
|
||||
data->low_power = low_power;
|
||||
i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
|
||||
(config & 0xBF) | (low_power << 6));
|
||||
}
|
||||
mutex_unlock(&data->update_lock);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
|
||||
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
|
||||
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
|
||||
static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
|
||||
static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
|
||||
static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 6);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, alarm, 5);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 4);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, alarm, 3);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 2);
|
||||
|
||||
static DEVICE_ATTR_RO(alarms);
|
||||
static DEVICE_ATTR_RW(low_power);
|
||||
|
||||
static struct attribute *adm1021_attributes[] = {
|
||||
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
||||
&dev_attr_alarms.attr,
|
||||
&dev_attr_low_power.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group adm1021_group = {
|
||||
.attrs = adm1021_attributes,
|
||||
};
|
||||
|
||||
static struct attribute *adm1021_min_attributes[] = {
|
||||
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group adm1021_min_group = {
|
||||
.attrs = adm1021_min_attributes,
|
||||
};
|
||||
|
||||
/* Return 0 if detection is successful, -ENODEV otherwise */
|
||||
static int adm1021_detect(struct i2c_client *client,
|
||||
struct i2c_board_info *info)
|
||||
{
|
||||
struct i2c_adapter *adapter = client->adapter;
|
||||
const char *type_name;
|
||||
int reg, conv_rate, status, config, man_id, dev_id;
|
||||
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
|
||||
pr_debug("detect failed, smbus byte data not supported!\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
|
||||
conv_rate = i2c_smbus_read_byte_data(client,
|
||||
ADM1021_REG_CONV_RATE_R);
|
||||
config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);
|
||||
|
||||
/* Check unused bits */
|
||||
if ((status & 0x03) || (config & 0x3F) || (conv_rate & 0xF8)) {
|
||||
pr_debug("detect failed, chip not detected!\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Determine the chip type. */
|
||||
man_id = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
|
||||
dev_id = i2c_smbus_read_byte_data(client, ADM1021_REG_DEV_ID);
|
||||
|
||||
if (man_id < 0 || dev_id < 0)
|
||||
return -ENODEV;
|
||||
|
||||
if (man_id == 0x4d && dev_id == 0x01) {
|
||||
/*
|
||||
* dev_id 0x01 matches MAX6680, MAX6695, MAX6696, and possibly
|
||||
* others. Read register which is unsupported on MAX1617 but
|
||||
* exists on all those chips and compare with the dev_id
|
||||
* register. If it matches, it may be a MAX1617A.
|
||||
*/
|
||||
reg = i2c_smbus_read_byte_data(client,
|
||||
ADM1023_REG_REM_TEMP_PREC);
|
||||
if (reg != dev_id)
|
||||
return -ENODEV;
|
||||
type_name = "max1617a";
|
||||
} else if (man_id == 0x41) {
|
||||
if ((dev_id & 0xF0) == 0x30)
|
||||
type_name = "adm1023";
|
||||
else if ((dev_id & 0xF0) == 0x00)
|
||||
type_name = "adm1021";
|
||||
else
|
||||
return -ENODEV;
|
||||
} else if (man_id == 0x49)
|
||||
type_name = "thmc10";
|
||||
else if (man_id == 0x23)
|
||||
type_name = "gl523sm";
|
||||
else if (man_id == 0x54)
|
||||
type_name = "mc1066";
|
||||
else {
|
||||
int lte, rte, lhi, rhi, llo, rlo;
|
||||
|
||||
/* extra checks for LM84 and MAX1617 to avoid misdetections */
|
||||
|
||||
llo = i2c_smbus_read_byte_data(client, ADM1021_REG_THYST_R(0));
|
||||
rlo = i2c_smbus_read_byte_data(client, ADM1021_REG_THYST_R(1));
|
||||
|
||||
/* fail if any of the additional register reads failed */
|
||||
if (llo < 0 || rlo < 0)
|
||||
return -ENODEV;
|
||||
|
||||
lte = i2c_smbus_read_byte_data(client, ADM1021_REG_TEMP(0));
|
||||
rte = i2c_smbus_read_byte_data(client, ADM1021_REG_TEMP(1));
|
||||
lhi = i2c_smbus_read_byte_data(client, ADM1021_REG_TOS_R(0));
|
||||
rhi = i2c_smbus_read_byte_data(client, ADM1021_REG_TOS_R(1));
|
||||
|
||||
/*
|
||||
* Fail for negative temperatures and negative high limits.
|
||||
* This check also catches read errors on the tested registers.
|
||||
*/
|
||||
if ((s8)lte < 0 || (s8)rte < 0 || (s8)lhi < 0 || (s8)rhi < 0)
|
||||
return -ENODEV;
|
||||
|
||||
/* fail if all registers hold the same value */
|
||||
if (lte == rte && lte == lhi && lte == rhi && lte == llo
|
||||
&& lte == rlo)
|
||||
return -ENODEV;
|
||||
|
||||
/*
|
||||
* LM84 Mfr ID is in a different place,
|
||||
* and it has more unused bits. Registers at 0xfe and 0xff
|
||||
* are undefined and return the most recently read value,
|
||||
* here the value of the configuration register.
|
||||
*/
|
||||
if (conv_rate == 0x00
|
||||
&& man_id == config && dev_id == config
|
||||
&& (config & 0x7F) == 0x00
|
||||
&& (status & 0xAB) == 0x00) {
|
||||
type_name = "lm84";
|
||||
} else {
|
||||
if ((config & 0x3f) || (status & 0x03))
|
||||
return -ENODEV;
|
||||
/* fail if low limits are larger than high limits */
|
||||
if ((s8)llo > lhi || (s8)rlo > rhi)
|
||||
return -ENODEV;
|
||||
type_name = "max1617";
|
||||
}
|
||||
}
|
||||
|
||||
pr_debug("Detected chip %s at adapter %d, address 0x%02x.\n",
|
||||
type_name, i2c_adapter_id(adapter), client->addr);
|
||||
strscpy(info->type, type_name, I2C_NAME_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void adm1021_init_client(struct i2c_client *client)
|
||||
{
|
||||
/* Enable ADC and disable suspend mode */
|
||||
i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
|
||||
i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
|
||||
/* Set Conversion rate to 1/sec (this can be tinkered with) */
|
||||
i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
|
||||
}
|
||||
|
||||
static int adm1021_probe(struct i2c_client *client)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
struct adm1021_data *data;
|
||||
struct device *hwmon_dev;
|
||||
|
||||
data = devm_kzalloc(dev, sizeof(struct adm1021_data), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->client = client;
|
||||
data->type = (uintptr_t)i2c_get_match_data(client);
|
||||
mutex_init(&data->update_lock);
|
||||
|
||||
/* Initialize the ADM1021 chip */
|
||||
if (data->type != lm84 && !read_only)
|
||||
adm1021_init_client(client);
|
||||
|
||||
data->groups[0] = &adm1021_group;
|
||||
if (data->type != lm84)
|
||||
data->groups[1] = &adm1021_min_group;
|
||||
|
||||
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
|
||||
data, data->groups);
|
||||
|
||||
return PTR_ERR_OR_ZERO(hwmon_dev);
|
||||
}
|
||||
|
||||
static const struct i2c_device_id adm1021_id[] = {
|
||||
{ "adm1021", adm1021 },
|
||||
{ "adm1023", adm1023 },
|
||||
{ "max1617", max1617 },
|
||||
{ "max1617a", max1617a },
|
||||
{ "thmc10", thmc10 },
|
||||
{ "lm84", lm84 },
|
||||
{ "gl523sm", gl523sm },
|
||||
{ "mc1066", mc1066 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, adm1021_id);
|
||||
|
||||
static struct i2c_driver adm1021_driver = {
|
||||
.class = I2C_CLASS_HWMON,
|
||||
.driver = {
|
||||
.name = "adm1021",
|
||||
},
|
||||
.probe = adm1021_probe,
|
||||
.id_table = adm1021_id,
|
||||
.detect = adm1021_detect,
|
||||
.address_list = normal_i2c,
|
||||
};
|
||||
|
||||
module_i2c_driver(adm1021_driver);
|
||||
|
||||
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
|
||||
"Philip Edelbrock <phil@netroedge.com>");
|
||||
MODULE_DESCRIPTION("adm1021 driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
module_param(read_only, bool, 0);
|
||||
MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
|
||||
@ -1,314 +0,0 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-or-later
|
||||
/*
|
||||
* Driver for +/-1 degree C, SMBus-Compatible Remote/Local Temperature Sensor
|
||||
* with Overtemperature Alarm
|
||||
*
|
||||
* Copyright (C) 2011 AppearTV AS
|
||||
*
|
||||
* Derived from:
|
||||
*
|
||||
* Based on the max1619 driver.
|
||||
* Copyright (C) 2003-2004 Oleksij Rempel <bug-track@fisher-privat.net>
|
||||
* Jean Delvare <jdelvare@suse.de>
|
||||
*
|
||||
* The MAX6642 is a sensor chip made by Maxim.
|
||||
* It reports up to two temperatures (its own plus up to
|
||||
* one external one). Complete datasheet can be
|
||||
* obtained from Maxim's website at:
|
||||
* http://datasheets.maxim-ic.com/en/ds/MAX6642.pdf
|
||||
*/
|
||||
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/jiffies.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/hwmon.h>
|
||||
#include <linux/hwmon-sysfs.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/sysfs.h>
|
||||
|
||||
static const unsigned short normal_i2c[] = {
|
||||
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
|
||||
|
||||
/*
|
||||
* The MAX6642 registers
|
||||
*/
|
||||
|
||||
#define MAX6642_REG_R_MAN_ID 0xFE
|
||||
#define MAX6642_REG_R_CONFIG 0x03
|
||||
#define MAX6642_REG_W_CONFIG 0x09
|
||||
#define MAX6642_REG_R_STATUS 0x02
|
||||
#define MAX6642_REG_R_LOCAL_TEMP 0x00
|
||||
#define MAX6642_REG_R_LOCAL_TEMPL 0x11
|
||||
#define MAX6642_REG_R_LOCAL_HIGH 0x05
|
||||
#define MAX6642_REG_W_LOCAL_HIGH 0x0B
|
||||
#define MAX6642_REG_R_REMOTE_TEMP 0x01
|
||||
#define MAX6642_REG_R_REMOTE_TEMPL 0x10
|
||||
#define MAX6642_REG_R_REMOTE_HIGH 0x07
|
||||
#define MAX6642_REG_W_REMOTE_HIGH 0x0D
|
||||
|
||||
/*
|
||||
* Conversions
|
||||
*/
|
||||
|
||||
static int temp_from_reg10(int val)
|
||||
{
|
||||
return val * 250;
|
||||
}
|
||||
|
||||
static int temp_from_reg(int val)
|
||||
{
|
||||
return val * 1000;
|
||||
}
|
||||
|
||||
static int temp_to_reg(int val)
|
||||
{
|
||||
return val / 1000;
|
||||
}
|
||||
|
||||
/*
|
||||
* Client data (each client gets its own)
|
||||
*/
|
||||
|
||||
struct max6642_data {
|
||||
struct i2c_client *client;
|
||||
struct mutex update_lock;
|
||||
bool valid; /* zero until following fields are valid */
|
||||
unsigned long last_updated; /* in jiffies */
|
||||
|
||||
/* registers values */
|
||||
u16 temp_input[2]; /* local/remote */
|
||||
u16 temp_high[2]; /* local/remote */
|
||||
u8 alarms;
|
||||
};
|
||||
|
||||
/*
|
||||
* Real code
|
||||
*/
|
||||
|
||||
static void max6642_init_client(struct max6642_data *data,
|
||||
struct i2c_client *client)
|
||||
{
|
||||
u8 config;
|
||||
|
||||
/*
|
||||
* Start the conversions.
|
||||
*/
|
||||
config = i2c_smbus_read_byte_data(client, MAX6642_REG_R_CONFIG);
|
||||
if (config & 0x40)
|
||||
i2c_smbus_write_byte_data(client, MAX6642_REG_W_CONFIG,
|
||||
config & 0xBF); /* run */
|
||||
|
||||
data->temp_high[0] = i2c_smbus_read_byte_data(client,
|
||||
MAX6642_REG_R_LOCAL_HIGH);
|
||||
data->temp_high[1] = i2c_smbus_read_byte_data(client,
|
||||
MAX6642_REG_R_REMOTE_HIGH);
|
||||
}
|
||||
|
||||
/* Return 0 if detection is successful, -ENODEV otherwise */
|
||||
static int max6642_detect(struct i2c_client *client,
|
||||
struct i2c_board_info *info)
|
||||
{
|
||||
struct i2c_adapter *adapter = client->adapter;
|
||||
u8 reg_config, reg_status, man_id;
|
||||
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
||||
return -ENODEV;
|
||||
|
||||
/* identification */
|
||||
man_id = i2c_smbus_read_byte_data(client, MAX6642_REG_R_MAN_ID);
|
||||
if (man_id != 0x4D)
|
||||
return -ENODEV;
|
||||
|
||||
/* sanity check */
|
||||
if (i2c_smbus_read_byte_data(client, 0x04) != 0x4D
|
||||
|| i2c_smbus_read_byte_data(client, 0x06) != 0x4D
|
||||
|| i2c_smbus_read_byte_data(client, 0xff) != 0x4D)
|
||||
return -ENODEV;
|
||||
|
||||
/*
|
||||
* We read the config and status register, the 4 lower bits in the
|
||||
* config register should be zero and bit 5, 3, 1 and 0 should be
|
||||
* zero in the status register.
|
||||
*/
|
||||
reg_config = i2c_smbus_read_byte_data(client, MAX6642_REG_R_CONFIG);
|
||||
if ((reg_config & 0x0f) != 0x00)
|
||||
return -ENODEV;
|
||||
|
||||
/* in between, another round of sanity checks */
|
||||
if (i2c_smbus_read_byte_data(client, 0x04) != reg_config
|
||||
|| i2c_smbus_read_byte_data(client, 0x06) != reg_config
|
||||
|| i2c_smbus_read_byte_data(client, 0xff) != reg_config)
|
||||
return -ENODEV;
|
||||
|
||||
reg_status = i2c_smbus_read_byte_data(client, MAX6642_REG_R_STATUS);
|
||||
if ((reg_status & 0x2b) != 0x00)
|
||||
return -ENODEV;
|
||||
|
||||
strscpy(info->type, "max6642", I2C_NAME_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct max6642_data *max6642_update_device(struct device *dev)
|
||||
{
|
||||
struct max6642_data *data = dev_get_drvdata(dev);
|
||||
struct i2c_client *client = data->client;
|
||||
u16 val, tmp;
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
|
||||
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
|
||||
dev_dbg(dev, "Updating max6642 data.\n");
|
||||
val = i2c_smbus_read_byte_data(client,
|
||||
MAX6642_REG_R_LOCAL_TEMPL);
|
||||
tmp = (val >> 6) & 3;
|
||||
val = i2c_smbus_read_byte_data(client,
|
||||
MAX6642_REG_R_LOCAL_TEMP);
|
||||
val = (val << 2) | tmp;
|
||||
data->temp_input[0] = val;
|
||||
val = i2c_smbus_read_byte_data(client,
|
||||
MAX6642_REG_R_REMOTE_TEMPL);
|
||||
tmp = (val >> 6) & 3;
|
||||
val = i2c_smbus_read_byte_data(client,
|
||||
MAX6642_REG_R_REMOTE_TEMP);
|
||||
val = (val << 2) | tmp;
|
||||
data->temp_input[1] = val;
|
||||
data->alarms = i2c_smbus_read_byte_data(client,
|
||||
MAX6642_REG_R_STATUS);
|
||||
|
||||
data->last_updated = jiffies;
|
||||
data->valid = true;
|
||||
}
|
||||
|
||||
mutex_unlock(&data->update_lock);
|
||||
|
||||
return data;
|
||||
}
|
||||
|
||||
/*
|
||||
* Sysfs stuff
|
||||
*/
|
||||
|
||||
static ssize_t temp_max10_show(struct device *dev,
|
||||
struct device_attribute *dev_attr, char *buf)
|
||||
{
|
||||
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
|
||||
struct max6642_data *data = max6642_update_device(dev);
|
||||
|
||||
return sprintf(buf, "%d\n",
|
||||
temp_from_reg10(data->temp_input[attr->index]));
|
||||
}
|
||||
|
||||
static ssize_t temp_max_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
|
||||
struct max6642_data *data = max6642_update_device(dev);
|
||||
|
||||
return sprintf(buf, "%d\n", temp_from_reg(data->temp_high[attr2->nr]));
|
||||
}
|
||||
|
||||
static ssize_t temp_max_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf,
|
||||
size_t count)
|
||||
{
|
||||
struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
|
||||
struct max6642_data *data = dev_get_drvdata(dev);
|
||||
unsigned long val;
|
||||
int err;
|
||||
|
||||
err = kstrtoul(buf, 10, &val);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
data->temp_high[attr2->nr] = clamp_val(temp_to_reg(val), 0, 255);
|
||||
i2c_smbus_write_byte_data(data->client, attr2->index,
|
||||
data->temp_high[attr2->nr]);
|
||||
mutex_unlock(&data->update_lock);
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
int bitnr = to_sensor_dev_attr(attr)->index;
|
||||
struct max6642_data *data = max6642_update_device(dev);
|
||||
return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
|
||||
}
|
||||
|
||||
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_max10, 0);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_max10, 1);
|
||||
static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp_max, 0,
|
||||
MAX6642_REG_W_LOCAL_HIGH);
|
||||
static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp_max, 1,
|
||||
MAX6642_REG_W_REMOTE_HIGH);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 2);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 6);
|
||||
static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 4);
|
||||
|
||||
static struct attribute *max6642_attrs[] = {
|
||||
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
||||
|
||||
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
ATTRIBUTE_GROUPS(max6642);
|
||||
|
||||
static int max6642_probe(struct i2c_client *client)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
struct max6642_data *data;
|
||||
struct device *hwmon_dev;
|
||||
|
||||
data = devm_kzalloc(dev, sizeof(struct max6642_data), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->client = client;
|
||||
mutex_init(&data->update_lock);
|
||||
|
||||
/* Initialize the MAX6642 chip */
|
||||
max6642_init_client(data, client);
|
||||
|
||||
hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
|
||||
client->name, data,
|
||||
max6642_groups);
|
||||
return PTR_ERR_OR_ZERO(hwmon_dev);
|
||||
}
|
||||
|
||||
/*
|
||||
* Driver data (common to all clients)
|
||||
*/
|
||||
|
||||
static const struct i2c_device_id max6642_id[] = {
|
||||
{ "max6642" },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, max6642_id);
|
||||
|
||||
static struct i2c_driver max6642_driver = {
|
||||
.class = I2C_CLASS_HWMON,
|
||||
.driver = {
|
||||
.name = "max6642",
|
||||
},
|
||||
.probe = max6642_probe,
|
||||
.id_table = max6642_id,
|
||||
.detect = max6642_detect,
|
||||
.address_list = normal_i2c,
|
||||
};
|
||||
|
||||
module_i2c_driver(max6642_driver);
|
||||
|
||||
MODULE_AUTHOR("Per Dalen <per.dalen@appeartv.com>");
|
||||
MODULE_DESCRIPTION("MAX6642 sensor driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user