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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 21:20:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 21:20:31 -0700 |
| commit | 5af2344013454640e0133bb62e8cf2e30190a472 (patch) | |
| tree | 93495d1eb88d7498dac4747a3d28081c09a69a55 /Documentation/w1/slaves/w1_therm | |
| parent | 19e36ad292ab24980db64a5ff17973d3118a8fb9 (diff) | |
| parent | 725d0123dfff3d7b666cf57f5d29c50addfc99d3 (diff) | |
| download | linux-stable-5af2344013454640e0133bb62e8cf2e30190a472.tar.gz linux-stable-5af2344013454640e0133bb62e8cf2e30190a472.tar.bz2 linux-stable-5af2344013454640e0133bb62e8cf2e30190a472.zip | |
Merge tag 'char-misc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char / misc driver updates from Greg KH:
"Here's the big char and misc driver update for 4.7-rc1.
Lots of different tiny driver subsystems have updates here with new
drivers and functionality. Details in the shortlog.
All have been in linux-next with no reported issues for a while"
* tag 'char-misc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (125 commits)
mcb: Delete num_cells variable which is not required
mcb: Fixed bar number assignment for the gdd
mcb: Replace ioremap and request_region with the devm version
mcb: Implement bus->dev.release callback
mcb: export bus information via sysfs
mcb: Correctly initialize the bus's device
mei: bus: call mei_cl_read_start under device lock
coresight: etb10: adjust read pointer only when needed
coresight: configuring ETF in FIFO mode when acting as link
coresight: tmc: implementing TMC-ETF AUX space API
coresight: moving struct cs_buffers to header file
coresight: tmc: keep track of memory width
coresight: tmc: make sysFS and Perf mode mutually exclusive
coresight: tmc: dump system memory content only when needed
coresight: tmc: adding mode of operation for link/sinks
coresight: tmc: getting rid of multiple read access
coresight: tmc: allocating memory when needed
coresight: tmc: making prepare/unprepare functions generic
coresight: tmc: splitting driver in ETB/ETF and ETR components
coresight: tmc: cleaning up header file
...
Diffstat (limited to 'Documentation/w1/slaves/w1_therm')
| -rw-r--r-- | Documentation/w1/slaves/w1_therm | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Documentation/w1/slaves/w1_therm b/Documentation/w1/slaves/w1_therm index 13411fe52f7f..d1f93af36f38 100644 --- a/Documentation/w1/slaves/w1_therm +++ b/Documentation/w1/slaves/w1_therm @@ -33,7 +33,15 @@ temperature conversion at a time. If none of the devices are parasite powered it would be possible to convert all the devices at the same time and then go back to read individual sensors. That isn't currently supported. The driver also doesn't support reduced -precision (which would also reduce the conversion time). +precision (which would also reduce the conversion time) when reading values. + +Writing a value between 9 and 12 to the sysfs w1_slave file will change the +precision of the sensor for the next readings. This value is in (volatile) +SRAM, so it is reset when the sensor gets power-cycled. + +To store the current precision configuration into EEPROM, the value 0 +has to be written to the sysfs w1_slave file. Since the EEPROM has a limited +amount of writes (>50k), this command should be used wisely. The module parameter strong_pullup can be set to 0 to disable the strong pullup, 1 to enable autodetection or 2 to force strong pullup. |