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Serge Semin 87976ce282 hwmon: Add Baikal-T1 PVT sensor driver 
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 <maxim.kaurkin@baikalelectronics.ru>
Signed-off-by: Maxim Kaurkin <maxim.kaurkin@baikalelectronics.ru>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2020-05-28 07:59:45 -07:00
..
ab8500.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
abituguru3.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
abituguru-datasheet.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
abituguru.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
abx500.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
acpi_power_meter.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ad7314.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adc128d818.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adm1021.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
adm1025.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adm1026.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adm1031.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adm1177.rst docs: adm1177: fix a broken reference 2020-02-23 20:00:29 -08:00
adm1275.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
adm9240.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ads7828.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adt7410.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adt7411.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adt7462.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adt7470.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
adt7475.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
amc6821.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
amd_energy.rst hwmon: (amd_energy) Add documentation 2020-05-22 06:28:39 -07:00
asb100.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
asc7621.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
aspeed-pwm-tacho.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
bel-pfe.rst docs: hwmon: Document bel-pfe pmbus driver 2019-11-06 14:37:19 -08:00
bt1-pvt.rst hwmon: Add Baikal-T1 PVT sensor driver 2020-05-28 07:59:45 -07:00
coretemp.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
da9052.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
da9055.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
dell-smm-hwmon.rst dell-smm-hwmon: Add documentation 2019-11-22 20:47:43 -08:00
dme1737.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
drivetemp.rst hwmon: Driver for disk and solid state drives with temperature sensors 2020-01-23 13:15:10 -08:00
ds620.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ds1621.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
emc6w201.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
emc1403.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
emc2103.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
f71805f.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
f71882fg.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
fam15h_power.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ftsteutates.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
g760a.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
g762.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
gl518sm.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
gsc-hwmon.rst hwmon: Add Gateworks System Controller support 2020-05-20 10:29:17 +01:00
hih6130.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
hwmon-kernel-api.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ibm-cffps.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
ibmaem.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ibmpowernv.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ina2xx.rst hwmon: (ina2xx) Implement alert functions 2020-05-22 06:28:38 -07:00
ina209.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ina3221.rst hwmon: (ina3221) Add summation feature support 2019-11-06 14:37:19 -08:00
index.rst hwmon: Add Baikal-T1 PVT sensor driver 2020-05-28 07:59:45 -07:00
inspur-ipsps1.rst Linux 5.4-rc4 2019-10-29 04:43:29 -06:00
ir35221.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ir38064.rst docs: hwmon: convert three docs to ReST format 2019-04-22 15:27:27 -07:00
isl68137.rst hwmon: (pmbus/isl68137) Fix up chip IDs 2020-04-12 15:12:51 -07:00
it87.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
jc42.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
k8temp.rst hwmon: (k8temp) documentation: update URL of datasheet 2019-07-21 19:18:45 -07:00
k10temp.rst hwmon: (k10temp) Update driver documentation 2020-03-08 20:35:46 -07:00
lineage-pem.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm63.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm70.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm73.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm75.rst hwmon: (lm75) add support for PCT2075 2019-09-03 12:47:17 -07:00
lm77.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm78.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm80.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm83.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm85.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm87.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm90.rst hwmon: (lm90) Add max6654 support to lm90 driver 2020-05-22 06:28:38 -07:00
lm92.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm93.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm25066.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
lm95234.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lm95245.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
lochnagar.rst docs: hwmon: convert three docs to ReST format 2019-04-22 15:27:27 -07:00
ltc2945.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ltc2947.rst hwmon: Add support for ltc2947 2019-11-06 14:37:19 -08:00
ltc2978.rst hwmon: (pmbus/ltc2978) add support for more parts. 2020-03-08 20:35:46 -07:00
ltc2990.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ltc3815.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ltc4151.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ltc4215.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ltc4245.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ltc4260.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ltc4261.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max197.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max1619.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max1668.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max6639.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max6642.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max6650.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
max6697.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max8688.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
max16064.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
max16065.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
max16601.rst hwmon: (pmbus) Driver for Maxim MAX16601 2020-05-22 06:28:38 -07:00
max20730.rst hwmon: (pmbus) Driver for MAX20730, MAX20734, and MAX20743 2020-01-23 13:15:10 -08:00
max20751.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
max31722.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max31730.rst hwmon: Driver for MAX31730 2020-01-23 13:15:09 -08:00
max31785.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max31790.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
max34440.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
mc13783-adc.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
mcp3021.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
menf21bmc.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
mlxreg-fan.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
nct6683.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
nct6775.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
nct7802.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
nct7904.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
npcm750-pwm-fan.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
nsa320.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ntc_thermistor.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
occ.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
pc87360.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
pc87427.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
pcf8591.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
pmbus-core.rst hwmon: (pmbus) Add 'phase' parameter where needed for multi-phase support 2020-03-08 20:35:47 -07:00
pmbus.rst hwmon: (pmbus) Implement multi-phase support 2020-03-08 20:35:47 -07:00
powr1220.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
pwm-fan.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
pxe1610.rst docs: hwmon: pxe1610: convert to ReST format and add to the index 2019-09-03 12:47:17 -07:00
raspberrypi-hwmon.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
sch5627.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
sch5636.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
scpi-hwmon.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
sht3x.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
sht15.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
sht21.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
shtc1.rst It's a somewhat calmer cycle for docs this time, as the churn of the mass 2019-09-17 16:22:26 -07:00
sis5595.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
smm665.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
smsc47b397.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
smsc47m1.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
smsc47m192.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
submitting-patches.rst hwmon: submitting-patches: Add note on comment style 2019-09-13 05:43:06 -07:00
sysfs-interface.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
tc74.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
tc654.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
thmc50.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
tmp102.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
tmp103.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
tmp108.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
tmp401.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
tmp421.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
tmp513.rst hwmon: Add driver for Texas Instruments TMP512/513 sensor chips. 2019-11-21 21:26:40 -08:00
tps40422.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
tps53679.rst hwmon: (pmbus/tps53679) Add documentation 2020-03-08 20:35:47 -07:00
twl4030-madc-hwmon.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
ucd9000.rst hwmon: (pmbus/ucd9000) Add support for UCD90320 Power Sequencer 2020-01-23 13:15:09 -08:00
ucd9200.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
userspace-tools.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
vexpress.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
via686a.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
vt1211.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83l785ts.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83l786ng.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83627ehf.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83627hf.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83773g.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83781d.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83791d.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83792d.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83793.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
w83795.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
wm831x.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
wm8350.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
xdpe12284.rst Documentation/hwmon: fix xdpe12284 Sphinx warnings 2020-02-17 14:20:55 -08:00
xgene-hwmon.rst docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
zl6100.rst docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00