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path: root/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c (follow)
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2022-04-20mlxsw: core_hwmon: Add interfaces for line card initialization and de-initializationVadim Pasternak1-0/+84
Add callback functions for line card 'hwmon' initialization and de-initialization. Each line card is associated with the relevant 'hwmon' device, which may contain thermal attributes for the cages and gearboxes found on this line card. The line card 'hwmon' initialization / de-initialization APIs are to be called when line card is set to active / inactive state by got_active() / got_inactive() callbacks from line card state machine. For example cage temperature for module #9 located at line card #7 will be exposed by utility 'sensors' like: linecard#07 front panel 009: +32.0C (crit = +70.0C, emerg = +80.0C) And temperature for gearbox #3 located at line card #5 will be exposed like: linecard#05 gearbox 003: +41.0C (highest = +41.0C) Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-15mlxsw: core_hwmon: Introduce slot parameter in hwmon interfacesVadim Pasternak1-10/+20
Add 'slot' parameter to 'mlxsw_hwmon_dev' structure. Use this parameter in mlxsw_reg_mtmp_pack(), mlxsw_reg_mtbr_pack(), mlxsw_reg_mgpir_pack() and mlxsw_reg_mtmp_slot_index_set() routines. For main board it'll always be zero, for line cards it'll be set to the physical slot number in modular systems. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-15mlxsw: core_hwmon: Extend internal structures to support multi hwmon objectsVadim Pasternak1-76/+111
Currently, mlxsw supports a single hwmon device and registers it with attributes corresponding to the various objects found on the main board such as fans and gearboxes. Line cards can have the same objects, but unlike the main board they can be added and removed while the system is running. The various hwmon objects found on these line cards should be created when the line card becomes available and destroyed when the line card becomes unavailable. The above can be achieved by representing each line card as a different hwmon device and registering / unregistering it when the line card becomes available / unavailable. Prepare for multi hwmon device support by splitting 'struct mlxsw_hwmon' into 'struct mlxsw_hwmon' and 'struct mlxsw_hwmon_dev'. The first will hold information relevant to all hwmon devices, whereas the second will hold per-hwmon device information. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-15mlxsw: core: Extend interfaces for cable info access with slot argumentVadim Pasternak1-4/+6
Extend all cable info APIs with 'slot_index' argument. For main board, slot will always be set to zero and these APIs will work as before. If reading cable information is required from cages located on line cards, slot should be set to the physical slot number, where line card is located in modular systems. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-04-12mlxsw: reg: Extend MGPIR register with new slot fieldsVadim Pasternak1-4/+5
Extend MGPIR (Management General Peripheral Information Register) with new fields specifying the slot number and number of the slots available on system. The purpose of these fields is: - to support access to MPGIR register on modular system for getting the number of cages, equipped on the line card, inserted at specified slot. In case slot number is set zero, MGPIR will provide the information for the main board. For Top of the Rack (non-modular) system it will provide the same as before. - to provide the number of slots supported by system. This data is relevant only in case slot number is set zero. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-12mlxsw: reg: Extend MTBR register with new slot number fieldVadim Pasternak1-2/+2
Extend MTBR (Management Temperature Bulk Register) with new field specifying the slot number. The purpose of this field is to support access to MTBR register for reading temperature sensors on modular system. For non-modular systems the 'sensor_index' uniquely identifies the cage sensors. For modular systems the sensors are identified by two indexes: - 'slot_index', specifying the slot number, where line card is located; - 'sensor_index', specifying cage sensor within the line card. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-12mlxsw: reg: Extend MTMP register with new slot number fieldVadim Pasternak1-5/+6
Extend MTMP (Management Temperature Register) with new field specifying the slot index. The purpose of this field is to support access to MTMP register for reading temperature sensors on modular systems. For non-modular systems the 'sensor_index' uniquely identifies the cage sensors, while 'slot_index' is always 0. For modular systems the sensors are identified by: - 'slot_index', specifying the slot index, where line card is located; - 'sensor_index', specifying cage sensor within the line card. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-23mlxsw: core_thermal: Remove obsolete API for query resourceVadim Pasternak1-3/+0
Remove obsolete API mlxsw_core_res_query_enabled(), which is only relevant for end-of-life SwitchX-2 ASICs. Support for these ASICs was removed in commit b0d80c013b04 ("mlxsw: Remove Mellanox SwitchX-2 ASIC support"). Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-02-23mlxsw: core_hwmon: Fix variable names for hwmon attributesVadim Pasternak1-38/+38
Replace all local variables 'mlwsw_hwmon_attr' by 'mlxsw_hwmon_attr'. All variable prefixes should start with 'mlxsw' according to the naming convention, so 'mlwsw' is changed to 'mlxsw'. Signed-off-by: Vadim Pasternak <vadimp@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-08mlxsw: reg: Extend MTMP register with new threshold fieldMykola Kostenok1-3/+3
Extend Management Temperature (MTMP) register with new field specifying the maximum temperature threshold. Extend mlxsw_reg_mtmp_unpack() function with two extra arguments, providing high and maximum temperature thresholds. For modules, these thresholds correspond to critical and emergency thresholds that are read from the module's EEPROM. Signed-off-by: Mykola Kostenok <c_mykolak@nvidia.com> Acked-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-27mlxsw: core_hwmon: Query MTMP before writing to set only relevant fieldsAmit Cohen1-4/+17
The MTMP register controls various temperature settings on a per-sensor basis. Subsequent patches are going to alter some of these settings for sensors found on port modules in response to certain events. In order to prevent the current callers that write to MTMP from overriding these settings, have them first query the register and then change only the relevant register fields. Signed-off-by: Amit Cohen <amcohen@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-2/+2
We got slightly different patches removing a double word in a comment in net/ipv4/raw.c - picked the version from net. Simple conflict in drivers/net/ethernet/ibm/ibmvnic.c. Use cached values instead of VNIC login response buffer (following what commit 507ebe6444a4 ("ibmvnic: Fix use-after-free of VNIC login response buffer") did). Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-09-03mlxsw: core_hwmon: Extend hwmon interface with critical and emergency alarmsAmit Cohen1-1/+70
Add new attributes to hwmon object for exposing critical and emergency alarms. In case that current temperature is higher than emergency threshold, EMERGENCY alarm will be reported in sensors utility: $ sensors ... front panel 025: +55.0°C (crit = +35.0°C, emerg = +40.0°C) ALARM(EMERGENCY) In case that current temperature is higher than critical threshold, CRIT alarm will be reported in sensors utility: $ sensors ... front panel 025: +54.0°C (crit = +35.0°C, emerg = +80.0°C) ALARM(CRIT) Signed-off-by: Amit Cohen <amitc@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Acked-by: Vadim Pasternak <vadimp@mellanox.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-03mlxsw: core_hwmon: Calculate MLXSW_HWMON_ATTR_COUNT more accuratelyAmit Cohen1-2/+11
Currently the value of MLXSW_HWMON_ATTR_COUNT is calculated not really accurate. Add several defines to make the calculation clearer and easier to change. Calculate the precise high bound of number of attributes that may be needed. Signed-off-by: Amit Cohen <amitc@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-03mlxsw: core_hwmon: Split temperature querying from show functionsAmit Cohen1-16/+54
mlxsw_hwmon_module_temp_show(), mlxsw_hwmon_module_temp_critical_show() and mlxsw_hwmon_module_temp_emergency_show() query the relevant temperature from firmware and fill the value in provided buffers. Split the temperature querying functionality to individual get() functions and call them from the show() functions. The get() functions will be used by subsequent patches in the set. Signed-off-by: Amit Cohen <amitc@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-23treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva1-2/+2
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-02-07mlxsw: core: Add validation of hardware device types for MGPIR registerVadim Pasternak1-2/+4
When reading the number of gearboxes from the hardware, the driver does not validate the returned 'device type' field. The driver can therefore wrongly assume that the queried devices are gearboxes. On Spectrum-3 systems that support different types of devices, this can prevent the driver from loading, as it will try to query the temperature sensors from devices which it assumes are gearboxes and in fact are not. For example: [ 218.129230] mlxsw_minimal 2-0048: Reg cmd access status failed (status=7(bad parameter)) [ 218.138282] mlxsw_minimal 2-0048: Reg cmd access failed (reg_id=900a(mtmp),type=write) [ 218.147131] mlxsw_minimal 2-0048: Failed to setup temp sensor number 256 [ 218.534480] mlxsw_minimal 2-0048: Fail to register core bus [ 218.540714] mlxsw_minimal: probe of 2-0048 failed with error -5 Fix this by validating the 'device type' field. Fixes: 2e265a8b6c094 ("mlxsw: core: Extend hwmon interface with inter-connect temperature attributes") Fixes: f14f4e621b1b4 ("mlxsw: core: Extend thermal core with per inter-connect device thermal zones") Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-06mlxsw: hwmon: Provide optimization for QSFP modules number detectionVadim Pasternak1-35/+29
Use new field "num_of_modules" of MGPIR register for "hwmon" interface in order to get the number of modules supported by system directly from the system configuration, instead of getting it from port to module mapping info. Reading this info through MGPIR register is faster and does not depend on possible dynamic re-configuration of ports. In case of port dynamic re-configuration some modules can logically "disappear" as a result of port split and un-spilt operations, which can cause missing of some modules, in case this info is taken from port to module mapping info. Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-06mlxsw: reg: Extend MGPIR register with new field exposing the number of QSFP modulesVadim Pasternak1-1/+1
Extend MGPIR - Management General Peripheral Information Register with new field "num_of_modules" exposing the number of modules supported by specific system. Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-06-24mlxsw: core: Add support for negative temperature readoutVadim Pasternak1-8/+6
Extend macros MLXSW_REG_MTMP_TEMP_TO_MC() to allow support of negative temperature readout, since chip and others thermal components are capable of operating within the negative temperature. With no such support negative temperature will be consider as very high temperature and it will cause wrong readout and thermal shutdown. For negative values 2`s complement is used. Tested in chamber. Example of chip ambient temperature readout with chamber temperature: -10 Celsius: temp1: -6.0C (highest = -5.0C) -5 Celsius: temp1: -1.0C (highest = -1.0C) v2 (Andrew Lunn): * Replace '%u' with '%d' in mlxsw_hwmon_module_temp_show() Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-30mlxsw: core: Reduce buffer size in transactions for SFP modules temperature readoutVadim Pasternak1-27/+7
Obtain SFP modules temperatures through MTMP register instead of MTBR register, because the first one utilizes shorter transaction buffer size for request. It improves performance in case low frequency interface (I2C) is used for communication with a chip. Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-30mlxsw: core: Extend hwmon interface with inter-connect temperature attributesVadim Pasternak1-5/+96
Add new attributes to hwmon object for exposing inter-connects temperature input, highest, reset_history temperatures and label. Temperatures are read from Management Temperature Register. The number of inter-connect devices is read from Management General Peripheral Information Register. Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-18mlxsw: core: Prevent QSFP module initialization for old hardwareVadim Pasternak1-0/+3
Old Mellanox silicons, like switchx-2, switch-ib do not support reading QSFP modules temperature through MTMP register. Attempt to access this register on systems equipped with the this kind of silicon will cause initialization flow failure. Test for hardware resource capability is added in order to distinct between old and new silicon - old silicons do not have such capability. Fixes: 6a79507cfe94 ("mlxsw: core: Extend thermal module with per QSFP module thermal zones") Fixes: 5c42eaa07bd0 ("mlxsw: core: Extend hwmon interface with QSFP module temperature attributes") Reported-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-15mlxsw: core: fix spelling mistake "temprature" -> "temperature"Colin Ian King1-4/+4
There is a spelling mistake in several dev_err messages, fix these. Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-13mlxsw: core: Add QSFP module temperature label attribute to hwmonVadim Pasternak1-0/+23
Add label attribute to hwmon object for exposing QSFP module's temperature sensor name. Modules are labeled as "front panel xxx". The label is used by utilities such as "sensors": front panel 001: +0.0C (crit = +0.0C, emerg = +0.0C) .. front panel 020: +31.0C (crit = +70.0C, emerg = +80.0C) .. front panel 056: +41.0C (crit = +70.0C, emerg = +80.0C) Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-13mlxsw: core: Extend hwmon interface with QSFP module temperature attributesVadim Pasternak1-3/+215
Add new attributes to hwmon object for exposing QSFP module temperature input, fault indication, critical and emergency thresholds. Temperature input and fault indication are read from Management Temperature Bulk Register. Temperature thresholds are read from Management Cable Info Access Register. Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-13mlxsw: core: Extend hwmon interface with fan fault attributeVadim Pasternak1-1/+33
Add new fan hwmon attribute for exposing fan faults (fault indication is read from Fan Out of Range Event Register). Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-17mlxsw: core: Fix use-after-free when flashing firmware during initIdo Schimmel1-6/+11
When the switch driver (e.g., mlxsw_spectrum) determines it needs to flash a new firmware version it resets the ASIC after the flashing process. The bus driver (e.g., mlxsw_pci) then registers itself again with mlxsw_core which means (among other things) that the device registers itself again with the hwmon subsystem again. Since the device was registered with the hwmon subsystem using devm_hwmon_device_register_with_groups(), then the old hwmon device (registered before the flashing) was never unregistered and was referencing stale data, resulting in a use-after free. Fix by removing reliance on device managed APIs in mlxsw_hwmon_init(). Fixes: c86d62cc410c ("mlxsw: spectrum: Reset FW after flash") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reported-by: Alexander Petrovskiy <alexpe@mellanox.com> Tested-by: Alexander Petrovskiy <alexpe@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-09mlxsw: Replace license text with SPDX identifiers and adjust copyrightsJiri Pirko1-33/+2
Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-26ethernet: Use octal not symbolic permissionsJoe Perches1-5/+5
Prefer the direct use of octal for permissions. Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace and some typing. Miscellanea: o Whitespace neatening around these conversions. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-30mlxsw: core: Zero payload buffers for couple of registersElad Raz1-2/+2
We recently discovered a bug in the firmware in which a field's length in one of the registers was incorrectly set. This caused the firmware to access garbage data that wasn't initialized by the driver and therefore emit error messages. While the bug is already fixed and the driver usually zeros the buffers passed to the firmware, there are a handful of cases where this isn't done. Zero the buffer in these cases and prevent similar bugs from recurring, as they tend to be hard to debug. Fixes: 52581961d83d ("mlxsw: core: Implement fan control using hwmon") Signed-off-by: Elad Raz <eladr@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-06mlxsw: core: remove an unnecessary conditionDan Carpenter1-1/+1
We checked "err" on the lines before so we know it's zero here. These cause a static checker warning because checking known things can indicate a bug. Maybe there is a missing assignment or we are checking the wrong variable. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-22mlxsw: core: Use devm_kzalloc to allocate mlxsw_hwmon structureJiri Pirko1-7/+2
KASan reported use-after-free for the hwmon structure. So fix this by using devm_kzalloc and let the core take care about freeing the memory during device dettach. Reported-by: Ido Schimmel <idosch@mellanox.com> Fixes: 89309da39 ("mlxsw: core: Implement temperature hwmon interface") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-22mlxsw: core: Allow to reset temperature history via hwmon interfaceJiri Pirko1-1/+36
Add another sysfs hwmon attribute to expose possibility to reset temperature sensors history. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-12mlxsw: core: Fix temperature sensor index during initializationJiri Pirko1-1/+1
Sensor index should be passed instead of 0. For now, this does not make a difference, since there is so far only one temperature sensor exposed by HW. Fixes: 89309da39 ("mlxsw: core: Implement temperature hwmon interface") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-11mlxsw: core: remove an unneeded conditionDan Carpenter1-1/+1
We already know "err" is zero so there is no need to check. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03mlxsw: core: Change BUG to WARN in hwmon codeJiri Pirko1-1/+1
Better to just warn the user that something really odd is going on and continue to run. Suggested-by: Or Gerlitz <gerlitz.or@gmail.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-30mlxsw: core: Implement fan control using hwmonJiri Pirko1-1/+120
ASIC provides access to fans. Implement their exposure to userspace using hwmon. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-30mlxsw: core: Implement temperature hwmon interfaceJiri Pirko1-0/+223
ASIC provides access to temperature sensors. Implement their exposure to userspace using hwmon. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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