linux.git/drivers/hwmon, branch v5.8-rc2

Merge branch 'x86/entry' into ras/core

2020-06-11T13:17:57+00:00

to fixup conflicts in arch/x86/kernel/cpu/mce/core.c so MCE specific follow
up patches can be applied without creating a horrible merge conflict
afterwards.

hwmon: Add Baikal-T1 PVT sensor driver

2020-05-28T14:59:45+00:00

Baikal-T1 SoC provides an embedded process, voltage and temperature
sensor to monitor an internal SoC environment (chip temperature, supply
voltage and process monitor) and on time detect critical situations,
which may cause the system instability and even damages. The IP-block
is based on the Analog Bits PVT sensor, but is equipped with a
dedicated control wrapper, which provides a MMIO registers-based access
to the sensor core functionality (APB3-bus based) and exposes an
additional functions like thresholds/data ready interrupts, its status
and masks, measurements timeout. All of these is used to create a hwmon
driver being added to the kernel by this commit.

The driver implements support for the hardware monitoring capabilities
of Baikal-T1 process, voltage and temperature sensors. PVT IP-core
consists of one temperature and four voltage sensors, each of which is
implemented as a dedicated hwmon channel config.

The driver can optionally provide the hwmon alarms for each sensor the
PVT controller supports. The alarms functionality is made compile-time
configurable due to the hardware interface implementation peculiarity,
which is connected with an ability to convert data from only one sensor
at a time. Additional limitation is that the controller performs the
thresholds checking synchronously with the data conversion procedure.
Due to these limitations in order to have the hwmon alarms
automatically detected the driver code must switch from one sensor to
another, read converted data and manually check the threshold status
bits. Depending on the measurements timeout settings this design may
cause additional burden on the system performance. By default if the
alarms kernel config is disabled the data conversion is performed by
the driver on demand when read operation is requested via corresponding
_input-file.

Co-developed-by: Maxim Kaurkin 
Signed-off-by: Maxim Kaurkin 
Signed-off-by: Serge Semin 
Cc: Alexey Malahov 
Cc: Thomas Bogendoerfer 
Cc: Arnd Bergmann 
Cc: Rob Herring 
Cc: linux-mips@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Guenter Roeck

hwmon: Add notification support

2020-05-28T14:59:45+00:00

For hwmon drivers using the hwmon_device_register_with_info() API, it
is desirable to have a generic notification mechanism available. This
mechanism can be used to notify userspace as well as the thermal
subsystem if the driver experiences any events, such as warning or
critical alarms.

Implement hwmon_notify_event() to provide this mechanism. The function
generates a sysfs event and a udev event. If the device is registered
with the thermal subsystem and the event is associated with a temperature
sensor, also notify the thermal subsystem that a thermal event occurred.

Signed-off-by: Guenter Roeck 
Signed-off-by: Serge Semin 
Cc: Maxim Kaurkin 
Cc: Alexey Malahov 
Cc: Thomas Bogendoerfer 
Cc: Arnd Bergmann 
Cc: Rob Herring 
Cc: linux-mips@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Guenter Roeck

hwmon: (applesmc) avoid overlong udelay()

2020-05-27T16:18:13+00:00

Building this driver with "clang -O3" produces a link error
after the compiler partially unrolls the loop and 256ms
becomes a compile-time constant that triggers the check
in udelay():

ld.lld: error: undefined symbol: __bad_udelay
>>> referenced by applesmc.c
>>>               hwmon/applesmc.o:(read_smc) in archive drivers/built-in.a

I can see no reason against using a sleeping function here,
as no part of the driver runs in atomic context, so instead use
usleep_range() with a wide range and use jiffies for the
end condition.

Signed-off-by: Arnd Bergmann 
Link: https://lore.kernel.org/r/20200527135207.1118624-1-arnd@arndb.de
Signed-off-by: Guenter Roeck

hwmon: (nct7904) Set default timeout

2020-05-27T06:46:24+00:00

The timeout module parameter should not be used for setting the default
timeout. Because, if you set the timeout = 0, the default timeout will
be meaningless. And the timeout module parameter of 0 means "no timeout
module parameter specified".

Signed-off-by: Yuechao Zhao 
Link: https://lore.kernel.org/r/1590560219-41328-1-git-send-email-yuechao.zhao@advantech.com.cn
Signed-off-by: Guenter Roeck

hwmon: (amd_energy) Missing platform_driver_unregister() on error in amd_energy_init()

2020-05-27T03:24:49+00:00

Add the missing platform_driver_unregister() before return
from amd_energy_init() in the error handling case.

Fixes: 8abee9566b7e ("hwmon: Add amd_energy driver to report energy counters")
Reported-by: Hulk Robot 
Signed-off-by: Wei Yongjun 
Acked-by: Naveen krishna Chatradhi 
Reported-by: Hulk Robot 
Signed-off-by: Wei Yongjun 
Link: https://lore.kernel.org/r/20200527022417.105620-1-weiyongjun1@huawei.com
Signed-off-by: Guenter Roeck

hwmon: (k10temp) Add AMD family 17h model 60h PCI match

2020-05-22T16:39:07+00:00

Add support for retrieving Tdie and Tctl on AMD Renoir (4000-series
Ryzen CPUs).

It appears SMU offsets for reading current/voltage and CCD temperature
have changed for this generation (reads from currently used offsets
yield zeros), so those features cannot be enabled so trivially.

Signed-off-by: Alexander Monakov 
Signed-off-by: Borislav Petkov 
Acked-by: Guenter Roeck 
Link: https://lkml.kernel.org/r/20200510204842.2603-3-amonakov@ispras.ru

Merge tag 'ib-mfd-hwmon-v5.8' into hwmon-next

2020-05-22T13:29:55+00:00

Immutable branch between MFD and HWMON due for the v5.8 merge window

hwmon: Add amd_energy driver to report energy counters

2020-05-22T13:28:38+00:00

This patch adds hwmon based amd_energy driver support for
family 17h processors from AMD.

The driver provides following interface to the userspace
1. Reports the per core consumption
	* file: "energy%d_input", label: "Ecore%03d"
2. Reports per socket energy consumption
	* file: "energy%d_input", label: "Esocket%d"
3. To, increase the wrap around time of the socket energy
   counters, a 64bit accumultor is implemented.
4. Reports scaled energy value in Joules.

Cc: Guenter Roeck 
Signed-off-by: Naveen Krishna Chatradhi 
Link: https://lore.kernel.org/r/20200519155011.56184-1-nchatrad@amd.com
Signed-off-by: Guenter Roeck

hwmon: (nct7802) Replace container_of() API

2020-05-22T13:28:38+00:00

Replace container_of() API with kobj_to_dev().

Signed-off-by: hailizheng 
Link: https://lore.kernel.org/r/1589891119-16508-1-git-send-email-haili.zheng@powercore.com.cn
Signed-off-by: Guenter Roeck