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2019-04-17docs: hwmon: w83791d: convert to ReST formatMauro Carvalho Chehab1-52/+71
Convert w83791d to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-17docs: hwmon: fam15h_power: convert to ReST formatMauro Carvalho Chehab1-28/+57
Convert fam15h_power to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-17docs: hwmon: pc87360: convert to ReST formatMauro Carvalho Chehab1-12/+26
Convert pc87360 to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-17docs: hwmon: emc2103: convert to ReST formatMauro Carvalho Chehab1-1/+5
Convert emc2103 to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-17docs: hwmon: sch5627: convert to ReST formatMauro Carvalho Chehab1-0/+4
Convert sch5627 to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-17docs: hwmon: menf21bmc: convert to ReST formatMauro Carvalho Chehab1-0/+5
Convert menf21bmc to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-17docs: hwmon: vexpress: convert to ReST formatMauro Carvalho Chehab1-3/+10
Convert vexpress to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Acked-by: Liviu Dudau <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-17docs: hwmon: k10temp: convert to ReST formatMauro Carvalho Chehab1-1/+36
Convert k10temp to ReST format, in order to allow it to be parsed by Sphinx. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-16hwmon: (occ) Add more details to Kconfig help textEddie James1-4/+8
The help text needs to spell out how the driver runs on a BMC, as it previously seemed to indicate it ran on a POWER processor. Signed-off-by: Eddie James <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-16hwmon: (occ) Prevent sysfs error attribute from returning errorEddie James1-6/+13
The error sysfs attribute returns the stored error state of the OCC and doesn't depend on the OCC poll response. Therefore, split the error attribute into it's own function to avoid failing out of the function if the poll response fails. Signed-off-by: Eddie James <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-16hwmon: (occ) Store error condition for rate-limited pollsEddie James2-1/+6
The OCC driver limits the rate of sending poll commands to the OCC. If a user reads a hwmon entry after a poll response resulted in an error and is rate-limited, the error is invisible to the user. Fix this by storing the last error and returning that in the rate-limited case. Signed-off-by: Eddie James <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-16hwmon: (ina3221) Add averaging mode supportNicolin Chen2-1/+69
The CONFIG register has a 3-bit averaging mode field for users to setup the number of samples that are collected and averaged together. This is very useful to filter noise from sensor data. This patch adds a 'samples' sysfs node using hwmon_chip_samples of hwmon core, and updates wait time calculation by taking this samples value into account. Signed-off-by: Nicolin Chen <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (pmbus/isl68137) Add driver for Intersil ISL68137 PWM ControllerMaxim Sloyko4-0/+251
Intersil ISL68137 is a digital output 7-phase configurable PWM controller with an AVSBus interface. Signed-off-by: Maxim Sloyko <[email protected]> Signed-off-by: Robert Lippert <[email protected]> Signed-off-by: Patrick Venture <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15pmbus: support for custom sysfs attributes[email protected]2-1/+15
This patch makes it possible to pass custom struct attribute_group array via the pmbus_driver_info struct so that those can be added to the attribute groups passed to hwmon_device_register_with_groups(). This makes it possible to register custom sysfs attributes by PMBUS drivers similar to how you can do this with most other busses/classes. Signed-off-by: Krzysztof Adamski <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: Add support for samples attributesGuenter Roeck2-0/+15
Add support for the new samples attributes to the hwmon core. Cc: Krzysztof Adamski <[email protected]> Cc: Nicolin Chen <[email protected]> Acked-by: Nicolin Chen <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (lm25066) Support SAMPLES_FOR_AVG registerAdamski, Krzysztof (Nokia - PL/Wroclaw)1-1/+16
Manufacturer specific SAMPLES_FOR_AVG register allows setting the number of samples used in computing the average values (PMBUS_VIRT_READ_*_AVG). The number we write is an exponent of base 2 of the number of samples so for example writing 3 will result in 8 samples average. Signed-off-by: Krzysztof Adamski <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: Document the samples attributesAdamski, Krzysztof (Nokia - PL/Wroclaw)1-0/+18
Document new ABI attributes: {in,power,curr,temp}_samples and samples. Signed-off-by: Krzysztof Adamski <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (pmbus) Introduce PMBUS_VIRT_*_SAMPLES registersAdamski, Krzysztof (Nokia - PL/Wroclaw)2-0/+125
Those virtual registers can be used to export manufacturer specific functionality for controlling the number of samples for average values reported by the device. Signed-off-by: Krzysztof Adamski <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (ir38064) delete incorrect linePatrick Venture1-3/+0
Delete line indicating the datasheet was not publicly available. This line was originally present as a default during the write-up and was subsequently not removed once the datasheet was located. Signed-off-by: Patrick Venture <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (pmbus_core) Replace S_<PERMS> with octal valuesGuenter Roeck1-3/+3
Replace S_<PERMS> with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (pmbus/ir38064) Add driver for Infineon IR38064 Voltage RegulatorMaxim Sloyko4-0/+139
Add the pmbus driver for the Infineon ir38064 voltage regulator. VOUT_MODE is not supported by the device. The driver fakes linear16 mode with exponent value -8. The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however this driver does not enable them. Signed-off-by: Maxim Sloyko <[email protected]> Signed-off-by: Patrick Venture <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (ir35221) fix company namePatrick Venture1-1/+1
Fix the company name from "Infinion" to "Infineon." Signed-off-by: Patrick Venture <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (pwm-fan) Report probe errors consistentlyRobin Murphy1-5/+8
Printing the error code for a failure provides a head-start for debugging, since it's often sufficient to pinpoint the origin of the failure. We already do this for some probe-failure messages, so let's make the rest of them consistent. Signed-off-by: Robin Murphy <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (pwm-fan) Add RPM support via external interruptStefan Wahren1-4/+101
This adds RPM support to the pwm-fan driver in order to use with fancontrol/pwmconfig. This feature is intended for fans with a tachometer output signal, which generate a defined number of pulses per revolution. Signed-off-by: Stefan Wahren <[email protected]> Reviewed-by: Robin Murphy <[email protected]> Signed-off-by: Robin Murphy <[email protected]> [groeck: Drop unused 'devattr' variable] Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15Documentation: pwm-fan: Add description for RPM supportStefan Wahren1-0/+3
This adds a short description for the new RPM support of the pwm-fan driver. Signed-off-by: Stefan Wahren <[email protected]> Reviewed-by: Robin Murphy <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15dt-bindings: hwmon: (pwm-fan) Add tachometer interruptStefan Wahren1-1/+20
This adds the tachometer interrupt to the pwm-fan binding, which is necessary for RPM support. Signed-off-by: Stefan Wahren <[email protected]> Reviewed-by: Rob Herring <[email protected]> Reviewed-by: Robin Murphy <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: OCC drivers are ARM-onlyJean Delvare1-0/+2
These drivers are for a BMC inside PowerPC servers. The BMC runs on ARM hardware, so only propose the drivers on this architecture, unless build-testing. Signed-off-by: Jean Delvare <[email protected]> Cc: Eddie James <[email protected]> Cc: Guenter Roeck <[email protected]> Reviewed-by: Eddie James <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (occ) Move common code to a separate moduleJean Delvare4-4/+14
Instead of duplicating the common code into the 2 (binary) drivers, move the common code to a separate module. This is cleaner. Signed-off-by: Jean Delvare <[email protected]> Cc: Eddie James <[email protected]> Cc: Guenter Roeck <[email protected]> Reviewed-by: Eddie James <[email protected]> Tested-by: Eddie James <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (vt1211) Use request_muxed_region for Super-IO accessesGuenter Roeck1-3/+12
Super-IO accesses may fail on a system with no or unmapped LPC bus. Also, other drivers may attempt to access the LPC bus at the same time, resulting in undefined behavior. Use request_muxed_region() to ensure that IO access on the requested address space is supported, and to ensure that access by multiple drivers is synchronized. Fixes: 2219cd81a6cd ("hwmon/vt1211: Add probing of alternate config index port") Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (w83627hf) Use request_muxed_region for Super-IO accessesGuenter Roeck1-5/+37
Super-IO accesses may fail on a system with no or unmapped LPC bus. Also, other drivers may attempt to access the LPC bus at the same time, resulting in undefined behavior. Use request_muxed_region() to ensure that IO access on the requested address space is supported, and to ensure that access by multiple drivers is synchronized. Fixes: b72656dbc491 ("hwmon: (w83627hf) Stop using globals for I/O port numbers") Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (smsc47m1) Use request_muxed_region for Super-IO accessesGuenter Roeck1-9/+19
Super-IO accesses may fail on a system with no or unmapped LPC bus. Also, other drivers may attempt to access the LPC bus at the same time, resulting in undefined behavior. Use request_muxed_region() to ensure that IO access on the requested address space is supported, and to ensure that access by multiple drivers is synchronized. Fixes: 8d5d45fb1468 ("I2C: Move hwmon drivers (2/3)") Reported-by: Kefeng Wang <[email protected]> Reported-by: John Garry <[email protected]> Cc: John Garry <[email protected]> Acked-by: John Garry <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (adm1029) Use permission specific [SENSOR_][DEVICE_]ATTR variantsGuenter Roeck1-20/+21
Use [SENSOR_][DEVICE_]ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Cc: Corentin Labbe <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (w83627hf) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-141/+116
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (smsc47m1) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-37/+41
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (smsc47m192) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-68/+78
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (vt8231) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-81/+85
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Cc: Roger Lucas <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (sis5595) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-48/+44
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (menf21bmc_hwmon) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-19/+24
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Cc: Andreas Werner <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (via686a) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-75/+73
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (lm85) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-166/+174
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (lm78) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-58/+56
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (lm87) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-78/+87
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (adm1031) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-104/+97
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (thmc50) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-42/+41
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (adm9240) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-70/+65
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (adm1026) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-200/+216
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (adm1025) Use permission specific SENSOR[_DEVICE]_ATTR variantsGuenter Roeck1-47/+51
Use SENSOR[_DEVICE]_ATTR[_2]_{RO,RW,WO} to simplify the source code, to improve readbility, and to reduce the chance of inconsistencies. Also replace any remaining S_<PERMS> in the driver with octal values. The conversion was done automatically with coccinelle. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches/. This patch does not introduce functional changes. It was verified by compiling the old and new files and comparing text and data sizes. Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (smsc47b397) Use request_muxed_region for Super-IO accessesGuenter Roeck1-2/+11
Super-IO accesses may fail on a system with no or unmapped LPC bus. Also, other drivers may attempt to access the LPC bus at the same time, resulting in undefined behavior. Use request_muxed_region() to ensure that IO access on the requested address space is supported, and to ensure that access by multiple drivers is synchronized. Fixes: 8d5d45fb1468 ("I2C: Move hwmon drivers (2/3)") Reported-by: Kefeng Wang <[email protected]> Reported-by: John Garry <[email protected]> Cc: John Garry <[email protected]> Acked-by: John Garry <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (pc87427) Use request_muxed_region for Super-IO accessesGuenter Roeck1-1/+13
Super-IO accesses may fail on a system with no or unmapped LPC bus. Also, other drivers may attempt to access the LPC bus at the same time, resulting in undefined behavior. Use request_muxed_region() to ensure that IO access on the requested address space is supported, and to ensure that access by multiple drivers is synchronized. Fixes: ba224e2c4f0a7 ("hwmon: New PC87427 hardware monitoring driver") Reported-by: Kefeng Wang <[email protected]> Reported-by: John Garry <[email protected]> Cc: John Garry <[email protected]> Acked-by: John Garry <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
2019-04-15hwmon: (f71805f) Use request_muxed_region for Super-IO accessesGuenter Roeck1-3/+12
Super-IO accesses may fail on a system with no or unmapped LPC bus. Unable to handle kernel paging request at virtual address ffffffbffee0002e pgd = ffffffc1d68d4000 [ffffffbffee0002e] *pgd=0000000000000000, *pud=0000000000000000 Internal error: Oops: 94000046 [#1] PREEMPT SMP Modules linked in: f71805f(+) hwmon CPU: 3 PID: 1659 Comm: insmod Not tainted 4.5.0+ #88 Hardware name: linux,dummy-virt (DT) task: ffffffc1f6665400 ti: ffffffc1d6418000 task.ti: ffffffc1d6418000 PC is at f71805f_find+0x6c/0x358 [f71805f] Also, other drivers may attempt to access the LPC bus at the same time, resulting in undefined behavior. Use request_muxed_region() to ensure that IO access on the requested address space is supported, and to ensure that access by multiple drivers is synchronized. Fixes: e53004e20a58e ("hwmon: New f71805f driver") Reported-by: Kefeng Wang <[email protected]> Reported-by: John Garry <[email protected]> Cc: John Garry <[email protected]> Acked-by: John Garry <[email protected]> Signed-off-by: Guenter Roeck <[email protected]>
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