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path: root/drivers/hwmon
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2017-09-14dmi: Mark all struct dmi_system_id instances constChristoph Hellwig3-4/+4
... and __initconst if applicable. Based on similar work for an older kernel in the Grsecurity patch. [JD: fix toshiba-wmi build] [JD: add htcpen] [JD: move __initconst where checkscript wants it] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jean Delvare <jdelvare@suse.de>
2017-09-01hwmon: (ltq-cputemp) add cpu temp sensor driverFlorian Eckert3-0/+171
Add the lantiq cpu temperature sensor support for xrx200. Signed-off-by: Florian Eckert <fe@dev.tdt.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-31hwmon: (pmbus) Add support for Texas Instruments tps53679 deviceVadim Pasternak3-0/+123
The below lists of VOUT_MODE command readout with their related VID protocols, Digital to Analog Converter steps, supported by the device: VR12.0 mode, 5-mV DAC - 0x21 VR12.5 mode, 10-mV DAC - 0x22 VR13.0 mode, 10-mV DAC - 0x24 IMVP8 mode, 5-mV DAC - 0x25 VR13.0 mode, 5-mV DAC - 0x27 Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-30Merge remote-tracking branch 'lee/ib-mfd-hwmon-4.14' into hwmon-nextGuenter Roeck1-22/+263
2017-08-30hwmon: (asc7621) make several arrays static constColin Ian King1-2/+2
Don't populate the arrays on the stack, instead make them static. Makes the object code smaller by over 950 bytes: Before: text data bss dec hex filename 26144 18768 352 45264 b0d0 drivers/hwmon/asc7621.o After: text data bss dec hex filename 25029 18928 352 44309 ad15 drivers/hwmon/asc7621.o Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-30hwmon: (pmbus/lm25066) Add support for TI LM5066IXo Wang1-2/+39
The TI LM5066I hotswap controller is a more accurate version of the LM5066 device already supported. It has different measurement conversion coefficients than the LM5066, so it needs to be recognized as a different device. Signed-off-by: Xo Wang <xow@google.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-30hwmon: (pmbus/lm25066) Offset coefficient depends on CLXo Wang1-2/+4
When converting the DIRECT format CURRENT_IN and POWER commands, make the offset coefficient ("b") predicate on the value of the current limit setting. Signed-off-by: Xo Wang <xow@google.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-30hwmon: (pmbus) Add support for Intel VID protocol VR13Vadim Pasternak2-1/+5
The below lists of VOUT_MODE command readout with their related VID protocols, Digital to Analog Converter steps: - VR13.0 mode, 10-mV DAC - 0x24 - VR13.0 mode, 5-mV DAC - 0x27 Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-30hwmon: (pmbus) Add IBM Common Form Factor (CFF) power supply driverEdward A. James3-0/+161
Add the driver to monitor IBM CFF power supplies with hwmon over pmbus. Signed-off-by: Edward A. James <eajames@us.ibm.com> [groeck: drop 'default n'; include bitops.h instead of jiffies.h] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-30hwmon: (ftsteutates) constify i2c_device_idArvind Yadav1-1/+1
i2c_device_id are not supposed to change at runtime. All functions working with i2c_device_id provided by <linux/i2c.h> work with const i2c_device_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-22hwmon: da9052: Add support for TSI channelSebastian Reichel1-4/+245
TSI channel has a 4 channel mux connected to it and is normally used for touchscreen support. The hardware may alternatively use it as general purpose adc. Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-08-22hwmon: da9052: Replace S_IRUGO with 0444Sebastian Reichel1-18/+18
Fix checkpatch warnings about S_IRUGO being less readable than providing the permissions octal as '0444'. Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-08-15hwmon: (aspeed-pwm) add THERMAL dependencyArnd Bergmann1-0/+1
With CONFIG_THERMAL=m, a built-in aspeed pwm tacho driver causes a link error: drivers/hwmon/aspeed-pwm-tacho.o: In function `aspeed_pwm_tacho_probe': aspeed-pwm-tacho.c:(.text+0x7f0): undefined reference to `thermal_of_cooling_device_register' This adds a dependency similar to what other hwmon drivers use, ensuring that the aspeed driver cannot be built-in in this case but has to be a module. With THERMAL=n, we still allow building it. Fixes: 2d7a548a3eff ("drivers: hwmon: Support for ASPEED PWM/Fan tach") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-14hwmon: (pmbus) Add debugfs for status registersEdward A. James1-0/+210
Export all the available status registers through debugfs. This is useful for hardware diagnostics, especially on multi-page pmbus devices, as user-space access of the i2c space could corrupt the pmbus page accounting. Signed-off-by: Edward A. James <eajames@us.ibm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (aspeed-pwm-tacho) cooling device support.Mykola Kostenok1-2/+114
Add support in aspeed-pwm-tacho driver for cooling device creation. This cooling device could be bound to a thermal zone for the thermal control. Device will appear in /sys/class/thermal folder as cooling_deviceX. Then it could be bound to particular thermal zones. Allow specification of the cooling levels vector - PWM duty cycle values in a range from 0 to 255 which correspond to thermal cooling states. Signed-off-by: Mykola Kostenok <c_mykolak@mellanox.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (pmbus): Add generic alarm bit for iin and pinEdward A. James1-1/+9
Add PB_STATUS_INPUT as the generic alarm bit for iin and pin. We also need to redo the status register checking before setting up the boolean attribute, since it won't necessarily check STATUS_WORD if the device doesn't support it, which we need for this bit. Signed-off-by: Edward A. James <eajames@us.ibm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (pmbus): Access word data for STATUS_WORDEdward A. James1-14/+40
Pmbus always reads byte data from the status register, even if configured to use STATUS_WORD. Use a function pointer to read the correct amount of data from the registers. Also switch to try STATUS_WORD first before STATUS_BYTE on init. Signed-off-by: Edward A. James <eajames@us.ibm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (pmbus): Switch status registers to 16 bitEdward A. James1-7/+7
Switch the storage of status registers to 16 bit values. This allows us to store all the bits of STATUS_WORD. Signed-off-by: Edward A. James <eajames@us.ibm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (it87) Reapply probe path chip registers settings after resumeMaciej S. Szmigiero1-2/+74
After a suspend / resume cycle we possibly need to reapply chip registers settings that we had set or fixed in a probe path, since they might have been reset to default values or set incorrectly by a BIOS again. Tested on a Gigabyte M720-US3 board, which requires routing internal VCCH5V to in7 (and had it wrong again on resume from S3). Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> [groeck: Return value from it87_resume_sio() is unused; make it void] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (it87) Split out chip registers setting code on probe pathMaciej S. Szmigiero1-50/+88
This commit splits out chip registers setting code on probe path to separate functions so they can be reused for setting the device properly again when system resumes from suspend. While we are at it let's also make clear that on IT8720 and IT8782 it's the VCCH5V line that is (possibly) routed to in7. This will make it consistent with a similar message that it printed on IT8783. Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (scpi) constify thermal_zone_of_device_ops structuresJulia Lawall1-1/+1
The thermal_zone_of_device_ops structure is only passed as the fourth argument to devm_thermal_zone_of_sensor_register, which is declared as const. Thus the thermal_zone_of_device_ops structure itself can be const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (core) constify thermal_zone_of_device_ops structuresJulia Lawall1-1/+1
The thermal_zone_of_device_ops structure is only passed as the fourth argument to devm_thermal_zone_of_sensor_register, which is declared as const. Thus the thermal_zone_of_device_ops structure itself can be const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (i5k_amb) constify pci_device_idArvind Yadav1-1/+1
pci_device_id are not supposed to change at runtime. All functions working with pci_device_id provided by <linux/pci.h> work with const pci_device_id. So mark the non-const structs as const. File size before: text data bss dec hex filename 3562 320 8 3890 f32 drivers/hwmon/i5k_amb.o File size After adding 'const': text data bss dec hex filename 3658 224 8 3890 f32 drivers/hwmon/i5k_amb.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (ads1015) Convert to using %pOF instead of full_nameRob Herring1-8/+6
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Dirk Eibach <eibach@gdsys.de> Cc: Jean Delvare <jdelvare@suse.com> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (jc42) Add support for CAT34TS02CGuenter Roeck1-0/+4
CAT34TS02C is similar to CAT34TS02 but has a different device ID. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (jc42) Add support for GT30TS00, GT34TS02, and CAT34TS04Guenter Roeck1-0/+15
Giantec GT30TS00 GT30TS00 and GT34TS02 as well as ONS CAT34TS04 are used on DDR4 DIMMs. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (adt7475) constify attribute_group structures.Arvind Yadav1-8/+8
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 10055 7032 0 17087 42bf drivers/hwmon/adt7475.o File size After adding 'const': text data bss dec hex filename 10567 6520 0 17087 42bf drivers/hwmon/adt7475.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (adc128d818) constify attribute_group structures.Arvind Yadav1-1/+1
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 2304 2936 0 5240 1478 drivers/hwmon/adc128d818.o File size After adding 'const': text data bss dec hex filename 2344 2872 0 5216 1460 drivers/hwmon/adc128d818.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (nct7802) constify attribute_group structures.Arvind Yadav1-5/+5
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 6161 9400 0 15561 3cc9 drivers/hwmon/nct7802.o File size After adding 'const': text data bss dec hex filename 6465 9080 0 15545 3cb9 drivers/hwmon/nct7802.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: constify attribute_group structures.Arvind Yadav1-1/+1
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 6655 304 0 6959 1b2f drivers/hwmon/hwmon.o File size After adding 'const': text data bss dec hex filename 6703 240 0 6943 1b1f drivers/hwmon/hwmon.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (stts751) buffer overrun on wrong chip configurationAnton Vasilyev1-0/+4
If stts751 hw by some reason reports conversion rate bigger then 9: ret = i2c_smbus_read_byte_data(priv->client, STTS751_REG_RATE); then dereferencing stts751_intervals[priv->interval] leads to buffer overrun. The patch adds sanity check for value stored on chip. Found by Linux Driver Verification project (linuxtesting.org). Fixes: 7f07ec0fa17a ("hwmon: new driver for ST stts751 thermal sensor") Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-08-13hwmon: (ftsteutates) Fix clearing alarm sysfs entriesThilo Cestonaro1-0/+2
sysfs store functions should return the number of bytes written. Returning zero results in an endless loop. Fixes: 08426eda58e0 ("hwmon: Add driver for FTS BMC chip "Teutates"") Signed-off-by: Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com> [groeck: Clean up documentation change and description] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-07-16hwmon: (applesmc) Avoid buffer overrunsGuenter Roeck1-4/+9
gcc 7.1 complains that the driver uses sprintf() and thus does not validate the length of output buffers. drivers/hwmon/applesmc.c: In function 'applesmc_show_fan_position': drivers/hwmon/applesmc.c:82:21: warning: '%d' directive writing between 1 and 5 bytes into a region of size 4 Fix the problem by using scnprintf() instead of sprintf() throughout the driver. Also explicitly limit the number of supported fans to avoid actual buffer overruns and thus invalid keys. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-24hwmon: (aspeed-pwm-tacho) Poll with short sleeps.Patrick Venture1-6/+18
The reference driver polled but mentioned it was possible to sleep for a computed period to know when it's ready to read. However, polling with minimal sleeps is quick and works. This also improves responsiveness from the driver. Testing: tested on ast2400 on quanta-q71l Signed-off-by: Patrick Venture <venture@google.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-24hwmon: (aspeed-pwm-tacho) reduce fan_tach periodPatrick Venture1-1/+1
Reduce the fan_tach period such that the fan controller uses a shorter period to measure the rpm. The original period of 0x1000 was chosen as a conversative value from the reference implementation. Through experimentation on the quanta-q71l board, I was able to drive the number down which ultimately reduced the time the controller would use to determine the fan_tach. This value was recently tested and accepted downstream on the IBM Zaius board which uses the ast2500. Future work: It may be worthwhile as this is a tunable parameter to the system, to allow overriding it through the device tree. Testing: Tested on an ast2400 sitting on a quanta-q71l and ast2500 on power9. Signed-off-by: Patrick Venture <venture@google.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-20hwmon: (ibmpowernv) Add current(A) sensorShilpasri G Bhat1-1/+3
This patch exports current(A) sensors in inband sensors copied to main memory by OCC. Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-20hwmon: (ibmpowernv) introduce a legacy_compatibles arrayCédric Le Goater1-8/+18
Today, the type of a PowerNV sensor system is determined with the "compatible" property for legacy Firmwares and with the "sensor-type" for newer ones. The same array of strings is used for both to do the matching and this raises some issue to introduce new sensor types. Let's introduce two different arrays (legacy and current) to make things easier for new sensor types. Signed-off-by: Cédric Le Goater <clg@kaod.org> Tested-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (pwm-fan) Switch to new atomic PWM APIBartlomiej Zolnierkiewicz1-42/+26
Switch pwm-fan driver to new atomic PWM API. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (scpi) Fix the scale of SCP sensor readingsCarlo Caione1-6/+48
The implementation details for SCPI seems to suggest that the sensor readings must be reported by SCP using a well defined scale (millidegree Celsius for temperature, millivolts for voltage, milliamperes for current, microwatts for power and microjoules for energy). This is also important for the interaction with other subsystems: for example both the thermal sub-system and the hwmon sysfs interface expect the temperature expressed in millidegree Celsius. Unfortunately since this behaviour is dependent on the firmware implementation there are cases where the sensor readings are reported using a different scale. For example in the Amlogic SoCs the temperature is reported in degree and not millidegree Celsius. To take into account this discrepancy and fixup the values reported by SCP a new compatible 'amlogic,meson-gxbb-scpi-sensors' is introduced and used in this patch by the scpi-hwmon driver to convert the sensor readings to the expected scale. Signed-off-by: Carlo Caione <carlo@endlessm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (aspeed-pwm-tacho) Enable both edge measurement.Patrick Venture1-3/+21
The aspeed-pwm-tacho controller supports measuring the fan tach by using leading, falling, or both edges. This change allows the driver to support either of the three configurations and will appropriately modify the returned tach data. If the controller is measuring with both edges it can return a value more quickly to the requestor. This version of the driver should still take ~1s to return with an RPM value per fan, however, it can be tuned faster with double edge counting enabled than without. I tested this and found the number returned matched what I expected. Signed-off-by: Patrick Venture <venture@google.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (ibmpowernv) Add highest/lowest attributes to sensorsShilpasri G Bhat1-7/+61
OCC provides historical minimum and maximum value for the sensor readings. This patch exports them as highest and lowest attributes for the inband sensors copied by OCC to main memory. Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (pmbus) move header file out of I2C realmWolfram Sang4-4/+4
include/linux/i2c is not for client devices. Move the header file to a more appropriate location. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (max6639) move header file out of I2C realmWolfram Sang1-1/+1
include/linux/i2c is not for client devices. Move the header file to a more appropriate location. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (ltc4245) move header file out of I2C realmWolfram Sang1-1/+1
include/linux/i2c is not for client devices. Move the header file to a more appropriate location. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (ds620) move header file out of I2C realmWolfram Sang1-1/+1
include/linux/i2c is not for client devices. Move the header file to a more appropriate location. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (ads1015) move header file out of I2C realmWolfram Sang1-1/+1
include/linux/i2c is not for client devices. Move the header file to a more appropriate location. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (adt7475) temperature smoothingChris Packham1-0/+91
When enabled temperature smoothing allows ramping the fan speed over a configurable period of time instead of jumping to the new speed instantaneously. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (adt7475) add high frequency supportChris Packham1-4/+5
Systems using 4-wire fans usually require high frequency (22.5kHz) output on the pwm. Add 22500 as a valid option in the pwmfreq_table. In high frequency mode the low-order bit are ignored so they can safely be set to 0. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (adt7475) fan stall preventionChris Packham1-0/+50
By default adt7475 will stop the fans (pwm duty cycle 0%) when the temperature drops past Tmin - hysteresis. Some systems want to keep the fans moving even when the temperature drops so add new sysfs attributes that configure the enhanced acoustics min 1-3 which allows the fans to run at the minimum configure pwm duty cycle. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-06-12hwmon: (adt7475) replace find_nearest() with find_closest()Chris Packham1-31/+3
The adt7475 has had find_nearest() since it's creation in 2009. Since then find_closest() has been introduced and several drivers have been updated to use it. Update the adt7475 to use find_closest() and remove the now unused find_nearest(). Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: Guenter Roeck <linux@roeck-us.net>