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f6725ae2f1
linux/drivers/hwmon
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Chris Lesiak f6725ae2f1 hwmon: (ntc_thermistor) Improve precision of resistance calculation 
The function get_ohm_of_thermistor has both the measured voltage and the
pullup voltage available in microvolts.  But it was promptly converting
both to millivolts before using them to calculate the thermistor
resistance.  That conversion unnecessarily hurt the precision of the
calculation.

For example, take the ncpXXwb473 connected to 5000 mV and pulled down
through a 47000 ohm resistor.  At 25 C, the resistance of the thermistor
is 47000 ohms.  The measured voltage will be 2500 mV.  If we measure
instead 2501 mV, then the calculated resistance will be 46962 ohms --
a difference of 38 ohms.  So the precision of the resistance estimate
could be increased by 38X by doing the calculations in microvolts.

Signed-off-by: Chris Lesiak <chris.lesiak@licor.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2015-06-03 15:25:53 -07:00
..
pmbus kconfig: use bool instead of boolean for type definition attributes 2015-01-07 13:08:04 +01:00
ab8500.c hwmon: (ab8500) Call kernel_power_off instead of pm_power_off 2014-10-03 08:19:02 -07:00
abituguru3.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
abituguru.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
abx500.c hwmon: (abx500) Fix format string warnings 2015-01-25 21:23:59 -08:00
abx500.h hwmon: Add ST-Ericsson ABX500 hwmon driver 2013-04-16 18:27:52 -07:00
acpi_power_meter.c ACPI: Clean up inclusions of ACPI header files 2013-12-07 01:03:14 +01:00
ad7314.c hwmon: (ad7314) Do proper sign extension 2015-01-25 21:23:59 -08:00
ad7414.c hwmon: (ad7414) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:35 -07:00
ad7418.c hwmon: (ad7418) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:35 -07:00
adc128d818.c hwmon: (adc128d818) Do proper sign extension 2015-01-25 21:24:00 -08:00
adcxx.c hwmon: (adcxx) Remove redundant spi_set_drvdata 2013-10-18 09:12:01 -07:00
adm1021.c hwmon: (adm1021) Avoid forward declaration 2014-08-04 07:01:36 -07:00
adm1025.c hwmon: (adm1025) Fix vrm write operation 2014-08-05 19:44:36 -07:00
adm1026.c hwmon: (adm1026) Fix vrm write operation 2014-08-05 19:44:36 -07:00
adm1029.c hwmon: (adm1029) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:35 -07:00
adm1031.c hwmon: (adm1031) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:37 -07:00
adm9240.c hwmon: (adm9240) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:37 -07:00
ads1015.c hwmon: (ads1015) Use of_property_read_u32 at appropriate places 2014-09-22 11:14:51 -07:00
ads7828.c hwmon: (ads7828) Check return value of devm_regmap_init_i2c 2015-02-22 20:10:30 -08:00
ads7871.c hwmon: Fix CamelCase checkpatch warnings 2013-04-07 21:16:40 -07:00
adt7x10.c hwmon: (adt7x10) Add alarm interrupt support 2013-04-07 21:16:38 -07:00
adt7x10.h hwmon: (adt7x10) Add alarm interrupt support 2013-04-07 21:16:38 -07:00
adt7310.c hwmon: (adt7310) Use spi_w8r16be() instead spi_w8r16() 2013-10-03 13:52:15 +01:00
adt7410.c hwmon: (adt7x10) Add alarm interrupt support 2013-04-07 21:16:38 -07:00
adt7411.c hwmon: (adt7411) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:40 -07:00
adt7462.c hwmon: (adt7462) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:39 -07:00
adt7470.c hwmon: (adt7470) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:39 -07:00
adt7475.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
amc6821.c hwmon: (amc6821) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:35 -07:00
applesmc.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
asb100.c hwmon: (asb100) Fix vrm write operation 2014-08-05 19:44:36 -07:00
asc7621.c hwmon: (asc7621) Make map tables const 2014-08-04 07:01:38 -07:00
asus_atk0110.c fs.h, drivers/hwmon/asus_atk0110.c: fix DEFINE_SIMPLE_ATTRIBUTE semicolon definition and use 2014-08-06 18:01:23 -07:00
atxp1.c hwmon: (atxp1) Drop auto-detection 2015-05-31 22:58:36 -07:00
coretemp.c hwmon: (coretemp) Allow format checking 2015-03-09 09:59:35 -07:00
da9052-hwmon.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
da9055-hwmon.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
dme1737.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
ds620.c hwmon: (ds620) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:38 -07:00
ds1621.c hwmon: (ds1621) Update zbits after conversion rate change 2014-08-28 11:18:47 -07:00
emc6w201.c hwmon: (emc6w201) Fix temperature limit range 2014-08-05 17:49:12 -07:00
emc1403.c hwmon: Make regmap configs const 2014-08-04 07:01:35 -07:00
emc2103.c hwmon: (emc2103) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:40 -07:00
f71805f.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
f71882fg.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
f75375s.c hwmon: (f75375s) Don't crash the kernel unnecessarily 2013-10-13 16:16:27 -07:00
fam15h_power.c hwmon: (fam15h_power) Fix NB device ID for F16h M30h 2014-11-11 10:39:45 -08:00
fschmd.c hwmon: Fix checkpatch warning 'quoted string split across lines' 2013-04-07 21:16:40 -07:00
g760a.c hwmon: (g760a) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:37 -07:00
g762.c hwmon: (g762) fix call to devm_hwmon_device_register_with_groups() 2014-11-19 14:06:47 -08:00
gl518sm.c hwmon: (gl518sm) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:36 -07:00
gl520sm.c hwmon: (gl520sm) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:36 -07:00
gpio-fan.c hwmon: (gpio-fan) Move the thermal registration after registration is complete 2015-04-08 20:34:43 -07:00
hih6130.c hwmon: (hih6130) Fix missing hih6130->write_length setting 2014-08-05 19:40:27 -07:00
htu21.c hwmon: (htu21) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:35 -07:00
hwmon-vid.c hwmon: (hwmon-vid) Add __maybe_unused attribute to dummy variable 2013-09-10 06:28:17 -07:00
hwmon.c hwmon: Do not accept invalid name attributes 2014-03-03 08:01:06 -08:00
i5k_amb.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
i5500_temp.c hwmon: (i5500_temp) Convert to use ATTRIBUTE_GROUPS macro 2015-01-24 14:16:22 +01:00
ibmaem.c hwmon: ibmaem: Use ktime_get_ns() 2014-07-23 15:01:44 -07:00
ibmpex.c hwmon: (ibmpex) Allow format string checking 2015-03-09 09:59:35 -07:00
ibmpowernv.c hwmon: (ibmpowernv) Fix build error seen for some configurations 2015-04-08 21:03:39 -07:00
iio_hwmon.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
ina2xx.c hwmon: (ina2xx) replace ina226_avg_bits() with find_closest() 2015-04-17 09:03:54 -04:00
ina209.c hwmon: (ina209) Convert to use devm_hwmon_device_register_with_groups 2013-10-18 09:11:57 -07:00
it87.c hwmon: (it87) Use feature macros on sio_data 2015-04-09 06:39:11 -07:00
jc42.c hwmon: (jc42) Add support for additional IDT temperature sensors 2015-03-09 09:59:35 -07:00
jz4740-hwmon.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
k8temp.c hwmon: remove DEFINE_PCI_DEVICE_TABLE macro 2014-01-14 21:36:30 -08:00
k10temp.c hwmon: (k10temp) Convert to devm_hwmon_device_register_with_groups 2014-09-22 11:14:52 -07:00
Kconfig hwmon: Allow compile test of GPIO consumers if !GPIOLIB 2015-05-31 22:58:36 -07:00
lineage-pem.c hwmon: (lineage-pem) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:37 -07:00
lm63.c hwmon: (lm63) Fix smatch warnings 2014-08-04 07:01:36 -07:00
lm70.c hwmon: (lm70) Convert to use devm_hwmon_device_register_with_groups 2014-05-21 16:02:20 -07:00
lm73.c hwmon: (lm73) Convert to use devm_hwmon_device_register_with_groups 2013-10-13 16:16:28 -07:00
lm75.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2014-12-17 10:16:27 -08:00
lm75.h
lm77.c hwmon: (lm77) Prevent overflow problem when writing large limits 2014-07-31 09:41:46 -07:00
lm78.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
lm80.c hwmon: (lm80) Rearrange code to avoid forward declarations 2014-05-21 16:02:26 -07:00
lm83.c hwmon: (lm83) Convert to use devm_hwmon_device_register_with_groups 2014-05-21 16:02:26 -07:00
lm85.c hwmon: (lm85) use find_closest() in x_TO_REG() functions 2015-04-17 09:03:55 -04:00
lm87.c hwmon: (lm87) Fix vrm write operation 2014-08-05 19:44:42 -07:00
lm90.c hwmon: (lm90) Convert to use hwmon_device_register_with_groups 2014-04-04 18:01:35 +02:00
lm92.c hwmon: (lm92) Prevent overflow problem when writing large limits 2014-08-05 17:48:52 -07:00
lm93.c hwmon: (lm93) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:36 -07:00
lm95234.c hwmon: (lm95234) Add support for LM95233 2014-12-02 06:11:53 -08:00
lm95241.c hwmon: (lm95241) Avoid initializing the same field twice 2014-03-03 08:01:04 -08:00
lm95245.c hwmon: (lm95245) Add support for LM95235 2014-12-02 03:44:18 -08:00
ltc2945.c hwmon: Make regmap configs const 2014-08-04 07:01:35 -07:00
ltc4151.c hwmon: (ltc4151) Convert to devm_hwmon_device_register_with_groups 2014-06-12 08:36:47 -07:00
ltc4215.c hwmon: (ltc4215) Convert to devm_hwmon_device_register_with_groups 2014-03-03 08:01:05 -08:00
ltc4222.c hwmon: Make regmap configs const 2014-08-04 07:01:35 -07:00
ltc4245.c hwmon: (ltc4245) Remove devicetree conditionals 2014-03-03 08:01:05 -08:00
ltc4260.c hwmon: Make regmap configs const 2014-08-04 07:01:35 -07:00
ltc4261.c hwmon: (ltc4261) fix coccinelle warnings 2013-10-18 09:12:00 -07:00
Makefile hwmon: Add Nuvoton NCT7904 hwmon driver 2015-03-09 09:59:36 -07:00
max197.c hwmon: (max197) Constify platform_device_id 2015-05-31 22:58:36 -07:00
max1111.c hwmon: (max1111) remove unnecessary OOM messages 2014-05-21 16:02:22 -07:00
max1619.c hwmon: (max1619) Convert to use devm_hwmon_device_register_with_groups 2014-05-21 16:02:25 -07:00
max1668.c hwmon: (max1668) Make max1668_addr_list array const 2014-08-04 07:01:39 -07:00
max6639.c hwmon: (max6639) Make normal_i2c array const 2014-08-04 07:01:39 -07:00
max6642.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
max6650.c hwmon: (max6650) Introduce local 'dev' variable 2014-03-03 08:01:06 -08:00
max6697.c hwmon: (max6697) Use of_property_read_bool at appropriate places 2014-08-04 07:01:40 -07:00
max16065.c hwmon: (max16065) Use PTR_ERR_OR_ZERO 2014-08-04 07:01:38 -07:00
mc13783-adc.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
mcp3021.c hwmon: use dev_get_platdata() 2013-08-11 22:10:39 -07:00
menf21bmc_hwmon.c Merge branch 'platform/remove_owner' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-next 2014-11-03 19:53:56 -08:00
nct6683.c hwmon: (nct6683) Add missing sysfs attribute initialization 2015-05-29 17:47:42 -07:00
nct6775.c hwmon: (nct6775) Add missing sysfs attribute initialization 2015-05-29 17:47:33 -07:00
nct7802.c hwmon: (nct7802) Constify struct regmap_config 2015-01-25 21:23:58 -08:00
nct7904.c hwmon: (nct7904) Strengthen detect function 2015-03-09 09:59:36 -07:00
ntc_thermistor.c hwmon: (ntc_thermistor) Improve precision of resistance calculation 2015-06-03 15:25:53 -07:00
pc87360.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
pc87427.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
pcf8591.c Update Jean Delvare's e-mail address 2014-01-29 20:40:08 +01:00
powr1220.c hwmon: Add support for Lattice's POWR1220 power manager IC 2014-08-04 07:01:33 -07:00
pwm-fan.c hwmon: (pwm-fan) Update the duty cycle inorder to control the pwm-fan 2015-04-12 15:59:11 -07:00
s3c-hwmon.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
sch56xx-common.c hwmon: Fix checkpatch warning 'quoted string split across lines' 2013-04-07 21:16:40 -07:00
sch56xx-common.h
sch5627.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
sch5636.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
sht15.c hwmon: (sht15) Constify platform_device_id 2015-05-31 22:58:36 -07:00
sht21.c hwmon: (sht21) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:38 -07:00
shtc1.c hwmon: add support for Sensirion SHTC1 sensor 2014-06-12 08:36:48 -07:00
sis5595.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
smm665.c hwmon: (smm665) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:37 -07:00
smsc47b397.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
smsc47m1.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
smsc47m192.c hwmon: (smsc47m192) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:39 -07:00
thmc50.c hwmon: (thmc50) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:39 -07:00
tmp102.c hwmon: (tmp102) add hibernation callbacks 2015-02-03 12:17:12 -08:00
tmp103.c hwmon: (tmp103) Fix resource leak bug in tmp103 temperature sensor driver 2014-09-22 11:11:48 -07:00
tmp401.c hwmon: (tmp401) Do not auto-detect chip on I2C address 0x37 2015-05-29 13:37:06 -07:00
tmp421.c hwmon: (tmp421) Drop FSF mailing address 2014-08-04 07:01:38 -07:00
twl4030-madc-hwmon.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
ultra45_env.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
vexpress.c hwmon: (pwm-fan, vexpress) Constify of_device_id array 2015-03-16 13:00:32 -07:00
via686a.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
via-cputemp.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
vt1211.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
vt8231.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
w83l785ts.c hwmon: Avoid initializing the same field twice 2014-04-04 18:01:34 +02:00
w83l786ng.c hwmon: (w83l786ng) Convert to devm_hwmon_device_register_with_groups 2014-08-04 07:01:34 -07:00
w83627ehf.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
w83627hf.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
w83781d.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
w83791d.c hwmon: (w83791d) Fix vrm write operation 2014-08-05 19:44:42 -07:00
w83792d.c hwmon: Avoid initializing the same field twice 2014-04-04 18:01:34 +02:00
w83793.c hwmon: (w83793) Fix vrm write operation 2014-08-05 19:44:42 -07:00
w83795.c hwmon: (w83795) use find_closest_descending() in pwm_freq_to_reg() 2015-04-17 09:03:55 -04:00
wm831x-hwmon.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00
wm8350-hwmon.c hwmon: drop owner assignment from platform_drivers 2014-10-20 16:20:36 +02:00