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148c847c9e
linux/drivers/hwmon
History
Guenter Roeck 148c847c9e hwmon: (max31790) Fix pwmX_enable attributes 
pwmX_enable supports three possible values:

0: Fan control disabled. Duty cycle is fixed to 0%
1: Fan control enabled, pwm mode. Duty cycle is determined by
   values written into Target Duty Cycle registers.
2: Fan control enabled, rpm mode
   Duty cycle is adjusted such that fan speed matches
   the values in Target Count registers

The current code does not do this; instead, it mixes pwm control
configuration with fan speed monitoring configuration. Worse, it
reports that pwm control would be disabled (pwmX_enable==0) when
it is in fact enabled in pwm mode. Part of the problem may be that
the chip sets the "TACH input enable" bit on its own whenever the
mode bit is set to RPM mode, but that doesn't mean that "TACH input
enable" accurately reflects the pwm mode.

Fix it up and only handle pwm control with the pwmX_enable attributes.
In the documentation, clarify that disabling pwm control (pwmX_enable=0)
sets the pwm duty cycle to 0%. In the code, explain why TACH_INPUT_EN
is set together with RPM_MODE.

While at it, only update the configuration register if the configuration
has changed, and only update the cached configuration if updating the
chip configuration was successful.

Cc: Jan Kundrát <jan.kundrat@cesnet.cz>
Cc: Václav Kubernát <kubernat@cesnet.cz>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Václav Kubernát <kubernat@cesnet.cz>
Reviewed-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Link: https://lore.kernel.org/r/20210526154022.3223012-4-linux@roeck-us.net
2021-06-17 04:21:46 -07:00
..
occ hwmon: (occ) Fix poll rate limiting 2021-05-10 06:27:33 -07:00
pmbus hwmon: (adm1275) enable adm1272 temperature reporting 2021-06-17 04:21:45 -07:00
abituguru3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
abituguru.c hwmon: abituguru: make array probe_order static, makes object smaller 2019-11-06 14:37:19 -08:00
acpi_power_meter.c hwmon: acpi_power_meter: Get rid of ACPICA message printing 2021-03-08 19:10:30 +01:00
ad7314.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
ad7414.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
ad7418.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adc128d818.c hwmon: Use kobj_to_dev() 2021-04-20 06:50:14 -07:00
adcxx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
adm1021.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adm1025.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adm1026.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adm1029.c hwmon: (adm1029) use simple i2c probe 2020-09-23 09:42:39 -07:00
adm1031.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adm1177.c hwmon: (adm1177) Fix kerneldoc attribute formatting 2020-12-02 17:42:23 -08:00
adm9240.c hwmon: (adm9240) Fix writes into inX_max attributes 2021-05-12 18:53:11 -07:00
ads7828.c hwmon: use simple i2c probe function (take 2) 2020-09-23 09:42:40 -07:00
ads7871.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 51 2019-05-24 17:36:42 +02:00
adt7x10.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
adt7x10.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
adt7310.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
adt7410.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adt7411.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adt7462.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
adt7470.c hwmon: (adt7470) Create functions for updating readings and limits 2020-12-02 17:42:23 -08:00
adt7475.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
aht10.c hwmon: (aht10) Unlock on error in aht10_read_values() 2021-01-27 17:44:19 -08:00
amc6821.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
applesmc.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
as370-hwmon.c hwmon: (as370-hwmon) fix devm_platform_ioremap_resource.cocci warnings 2019-09-03 12:47:17 -07:00
asb100.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
asc7621.c hwmon: (asc7621) use simple i2c probe 2020-09-23 09:42:40 -07:00
aspeed-pwm-tacho.c hwmon: (aspeed-pwm-tacho) Switch to using the new API kobj_to_dev() 2021-01-27 17:44:18 -08:00
asus_atk0110.c hwmon: (asus_atk0110) no need to check return value of debugfs_create functions 2019-06-23 18:33:01 -07:00
atxp1.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
axi-fan-control.c hwmon: (axi-fan-control) remove duplicate macros 2020-08-04 14:27:20 -07:00
bt1-pvt.c hwmon: (bt1-pvt) Remove redundant error printing in pvt_request_regs() 2021-06-17 04:21:45 -07:00
bt1-pvt.h hwmon: (bt1-pvt) Cache current update timeout 2020-10-04 08:40:10 -07:00
coretemp.c hwmon: Convert to new X86 CPU match macros 2020-03-24 21:33:36 +01:00
corsair-cpro.c hwmon: (corsair-cpro) add reading pwm values 2020-07-24 07:44:57 -07:00
corsair-psu.c hwmon: (corsair-psu) fix suspend behavior 2021-06-09 11:51:30 -07:00
da9052-hwmon.c hwmon: (da9052) Switch to using the new API kobj_to_dev() 2021-02-11 20:28:56 -08:00
da9055-hwmon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dell-smm-hwmon.c hwmon: (dell-smm-hwmon) Fix index values 2021-05-16 16:00:55 -07:00
dme1737.c hwmon: (dme1737) use simple i2c probe 2020-09-23 09:42:40 -07:00
drivetemp.c hwmon: drivetemp: fix typo temperatire => temperature 2020-12-02 17:42:23 -08:00
ds620.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
ds1621.c hwmon: (ds1621) Use kobj_to_dev() 2021-04-20 06:50:14 -07:00
emc6w201.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
emc1403.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
emc2103.c hwmon: (emc2103) use simple i2c probe 2020-09-23 09:42:40 -07:00
f71805f.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
f71882fg.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
f75375s.c hwmon: (f75375s) use simple i2c probe 2020-09-23 09:42:40 -07:00
fam15h_power.c x86/msr: Lift AMD family 0x15 power-specific MSRs 2020-06-15 19:25:53 +02:00
fschmd.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
ftsteutates.c hwmon: (ftsteutates) Rudimentary typo fixes 2021-04-20 06:50:14 -07:00
g760a.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
g762.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
gl518sm.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
gl520sm.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
gpio-fan.c hwmon: (gpio-fan) Switch to using the new API kobj_to_dev() 2021-01-27 17:44:18 -08:00
gsc-hwmon.c hwmon: (gsc-hwmon) add fan sensor 2020-09-23 09:42:41 -07:00
hih6130.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
hwmon-vid.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
hwmon.c hwmon: Switch to using the new API kobj_to_dev() 2021-04-20 06:50:14 -07:00
i5k_amb.c hwmon: (i5k_amb, vt8231) Drop uses of pci_read_config_*() return value 2020-08-04 14:24:39 -07:00
i5500_temp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
ibmaem.c hwmon: (ibmaem) Replace zero-length array with flexible-array member 2020-03-08 20:35:46 -07:00
ibmpex.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ibmpowernv.c hwmon: (ibmpowernv) Silence strncpy() warning 2020-12-02 17:42:23 -08:00
iio_hwmon.c hwmon: (iio_hwmon) Drop bogus __refdata annotation 2020-12-11 07:42:27 -08:00
ina2xx.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ina209.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ina3221.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
intel-m10-bmc-hwmon.c hwmon: (intel-m10-bmc-hwmon) add sensor support of Intel D5005 card 2021-04-20 06:50:14 -07:00
it87.c hwmon: Use kobj_to_dev() 2021-04-20 06:50:14 -07:00
jc42.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
k8temp.c hwmon: (k8temp) update to use new hwmon registration API 2019-09-03 12:47:17 -07:00
k10temp.c hwmon: (k10temp) Zen3 Ryzen Desktop CPUs support 2021-01-27 17:44:18 -08:00
Kconfig hwmon: Add sht4x Temperature and Humidity Sensor Driver 2021-06-17 04:21:45 -07:00
lineage-pem.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
lm63.c hwmon: Use kobj_to_dev() 2021-04-20 06:50:14 -07:00
lm70.c hwmon: (lm70) Use SPI_MODE_X_MASK 2021-06-17 04:21:44 -07:00
lm73.c hwmon: (lm73) use simple i2c probe 2020-09-23 09:42:40 -07:00
lm75.c hwmon: (lm75) Add TI TMP1075 support 2021-06-17 04:21:44 -07:00
lm75.h hwmon: (lm75) Fix all coding-style warnings on lm75 driver 2020-05-22 06:28:38 -07:00
lm77.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm78.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm80.c Revert "hwmon: (lm80) fix a missing check of bus read in lm80 probe" 2021-05-13 17:30:01 +02:00
lm83.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm85.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm87.c hwmon: use simple i2c probe function (take 2) 2020-09-23 09:42:40 -07:00
lm90.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm92.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm93.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm95234.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm95241.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lm95245.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
lochnagar-hwmon.c hwmon: lochnagar: Add Lochnagar 2 hardware monitoring driver 2019-04-15 17:19:53 -07:00
ltc2945.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ltc2947-core.c hwmon: Add support for ltc2947 2019-11-06 14:37:19 -08:00
ltc2947-i2c.c hwmon: (ltc2947) use simple i2c probe 2020-09-23 09:42:40 -07:00
ltc2947-spi.c hwmon: Add support for ltc2947 2019-11-06 14:37:19 -08:00
ltc2947.h hwmon: Add support for ltc2947 2019-11-06 14:37:19 -08:00
ltc2990.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ltc2992.c hwmon: (ltc2992) Put fwnode in error case during ->probe() 2021-05-10 08:02:15 -07:00
ltc4151.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ltc4215.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ltc4222.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ltc4245.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
ltc4260.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ltc4261.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
ltq-cputemp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
Makefile hwmon: Add sht4x Temperature and Humidity Sensor Driver 2021-06-17 04:21:45 -07:00
max127.c hwmon: (max127) Add Maxim MAX127 hardware monitoring driver 2020-12-02 17:42:24 -08:00
max197.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
max1111.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 332 2019-06-05 17:37:06 +02:00
max1619.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
max1668.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
max6621.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
max6639.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
max6642.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
max6650.c hwmon: (max6650) Switch to using the new API kobj_to_dev() 2021-01-27 17:44:18 -08:00
max6697.c hwmon: Use kobj_to_dev() 2021-04-20 06:50:14 -07:00
max16065.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
max31722.c hwmon: (max31722) Remove non-standard ACPI device IDs 2021-06-17 04:21:44 -07:00
max31730.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
max31790.c hwmon: (max31790) Fix pwmX_enable attributes 2021-06-17 04:21:46 -07:00
mc13783-adc.c hwmon: (mc13783-adc) Use permission specific SENSOR[_DEVICE]_ATTR variants 2019-02-18 14:23:29 -08:00
mcp3021.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
menf21bmc_hwmon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mlxreg-fan.c hwmon: (mlxreg-fan) Add support for fan drawers capability and present registers 2021-04-20 06:50:14 -07:00
mr75203.c hwmon: Add hardware monitoring driver for Moortec MR75203 PVT controller 2020-10-06 14:51:18 -07:00
nct6683.c hwmon: (nct6683) remove useless function 2021-04-20 06:50:14 -07:00
nct6775.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nct7802.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
nct7904.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
npcm750-pwm-fan.c hwmon: (npcm750-pwm-fan) Remove dev_err() usage after platform_get_irq() 2019-09-03 12:47:17 -07:00
nsa320-hwmon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 408 2019-06-05 17:37:14 +02:00
ntc_thermistor.c hwmon: (ntc_thermistor): try reading processed 2021-03-25 19:13:51 +00:00
nzxt-kraken2.c hwmon: add driver for NZXT Kraken X42/X52/X62/X72 2021-04-20 06:50:14 -07:00
pc87360.c hwmon: (pc87360) convert comma to semicolon 2021-01-27 17:44:17 -08:00
pc87427.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
pcf8591.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
powr1220.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
pwm-fan.c - Use the newly introduced 'hot' and 'critical' ops for the acpi 2021-02-22 09:39:11 -08:00
raspberrypi-hwmon.c hwmon: raspberry-pi: Clean-up few drivers by using managed work init 2021-03-23 15:22:40 +01:00
s3c-hwmon.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
sbtsi_temp.c hwmon: (sbtsi) Add basic support for SB-TSI sensors 2020-12-12 08:32:35 -08:00
sch56xx-common.c hwmon: (sch56xx-common) Simplify sch56xx_device_add 2021-06-17 04:21:44 -07:00
sch56xx-common.h hwmon: (sch56xx) Use devres functions for watchdog 2021-06-17 04:21:44 -07:00
sch5627.c hwmon: (sch56xx) Use devres functions for watchdog 2021-06-17 04:21:44 -07:00
sch5636.c hwmon: (sch56xx) Use devres functions for watchdog 2021-06-17 04:21:44 -07:00
scmi-hwmon.c hwmon: (scmi) port driver to the new scmi_sensor_proto_ops interface 2021-03-30 16:34:55 +01:00
scpi-hwmon.c hwmon: (scpi-hwmon) shows the negative temperature properly 2021-06-09 11:51:30 -07:00
sht3x.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
sht4x.c hwmon: (sht4x) Fix sht4x_read_values return value 2021-06-17 04:21:45 -07:00
sht15.c docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
sht21.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
shtc1.c hwmon: shtc1: add support for device tree bindings 2020-09-23 09:42:40 -07:00
sis5595.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
sl28cpld-hwmon.c hwmon: Add support for the sl28cpld hardware monitoring controller 2020-09-17 16:02:42 +01:00
smm665.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
smsc47b397.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
smsc47m1.c hwmon: (smsc47m1) Remove 'h' from printk format specifier 2021-01-27 17:44:17 -08:00
smsc47m192.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
sparx5-temp.c hwmon: (sparx5) Fix initial reading of temperature 2020-09-23 09:39:40 -07:00
stts751.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
tc74.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
tc654.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
thmc50.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
tmp102.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
tmp103.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
tmp108.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
tmp401.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
tmp421.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
tmp513.c hwmon: (tmp513) fix spelling typo in comments 2020-10-04 08:40:10 -07:00
tps23861.c hwmon: (tps23861) correct shunt LSB values 2021-06-10 08:40:09 -07:00
ultra45_env.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
vexpress-hwmon.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00
via686a.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
via-cputemp.c hwmon: Convert to new X86 CPU match macros 2020-03-24 21:33:36 +01:00
vt1211.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
vt8231.c hwmon: (i5k_amb, vt8231) Drop uses of pci_read_config_*() return value 2020-08-04 14:24:39 -07:00
w83l785ts.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
w83l786ng.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
w83627ehf.c hwmon: (w83627ehf) Switch to using the new API kobj_to_dev() 2021-01-27 17:44:17 -08:00
w83627hf.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
w83773g.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
w83781d.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
w83791d.c hwmon: (w83791d) use simple i2c probe 2020-09-23 09:42:40 -07:00
w83792d.c hwmon: use simple i2c probe function 2020-09-23 09:42:39 -07:00
w83793.c hwmon: (w83793) use simple i2c probe 2020-09-23 09:42:39 -07:00
w83795.c hwmon: use simple i2c probe function (take 2) 2020-09-23 09:42:40 -07:00
wm831x-hwmon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 271 2019-06-05 17:30:30 +02:00
wm8350-hwmon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 271 2019-06-05 17:30:30 +02:00
xgene-hwmon.c hwmon: replace snprintf in show functions with sysfs_emit 2021-04-20 06:50:14 -07:00