linux-toradex.git/Documentation/hwmon/lm75, branch v5.1

hwmon: (lm75) Add STLM75 support

2018-12-16T23:13:22+00:00

The STLM75 is a high-precision digital CMOS temperature sensor
IC with a sigma-delta temperature-to-digital converter.

The configuration register mapping is similar to existing lm75
but the sample rate is 150ms(max).

Tested on real hardware and verified temperature readings are correct.

Signed-off-by: Jagan Teki 
Signed-off-by: Guenter Roeck

hwmon: (lm75) Add MAX31725/6 support

2018-10-11T03:37:13+00:00

MAX31725/MAX31726 are local temperature sensors with +/- 0.5 degree
Celsius accuracy and 16-bit (0.00390625 degrees Celsius) resolution.
They have a register mapping and encoding compatible with the lm75
series drivers. Address scan and extended temperature range are
not supported by this patch.

Tested on real hardware and verified temperature readings are correct.

Signed-off-by: Kun Yi 
Signed-off-by: Guenter Roeck

hwmon: (lm75) Add support for TMP75C

2015-10-14T14:57:14+00:00

The TMP75C has a different control register layout and only supports
12-bit temperature samples (0.0625 deg C).
The continuous sample rate is ~12 Hz.

Signed-off-by: Ben Gardner 
Signed-off-by: Guenter Roeck

hwmon: (lm75) Add support for the NXP LM75B

2014-12-01T04:13:13+00:00

It is basically a faster lm75 with improved (11 bit) resolution.

Signed-off-by: Michael Thalmeier 
Signed-off-by: Guenter Roeck

hwmon: (lm75) Add support for TMP112

2014-08-04T14:01:34+00:00

TMP112 is compatible to LM75.

Signed-off-by: Frans Klaver 
Signed-off-by: Guenter Roeck

hwmon: (lm75) Add support for the Dallas/Maxim DS7505

2013-05-04T12:49:36+00:00

Basically it's the same as the original DS75 but much faster.

Signed-off-by: Jean Delvare 
Acked-by: Guenter Roeck

hwmon: (lm75) Tune resolution and sample time per chip

2013-05-04T12:49:36+00:00

Most LM75-compatible chips can either sample much faster or with a
much better resolution than the original LM75 chip. So far the lm75
driver did not let the user take benefit of these improvements. Do it
now.

I decided to almost always configure the chip to use the best
resolution possible, which also means the longest sample time. The
only chips for which I didn't are the DS75, DS1775 and STDS75, because
they are really too slow in 12-bit mode (1.2 to 1.5 second worst case)
so I went for 11-bit mode as a more reasonable tradeoff. This choice is
dictated by the fact that the hwmon subsystem is meant for system
monitoring, it has never been supposed to be ultra-fast, and as a
matter of fact we do cache the sampled values in almost all drivers.

If anyone isn't pleased with these default settings, they can always
introduce a platform data structure or DT support for the lm75. That
being said, it seems nobody ever complained that the driver wouldn't
refresh the value faster than every 1.5 second, and the change made
it faster for all chips even in 12-bit mode, so I don't expect any
complaint.

Signed-off-by: Jean Delvare 
Acked-by: Guenter Roeck

hwmon: (lm75) Fix tcn75 prefix

2013-03-18T20:19:49+00:00

The TCN75 has its own prefix for a long time now.

Signed-off-by: Jean Delvare 
Reviewed-by: Guenter Roeck

hwmon: (lm75) Document why clones are not detected

2011-10-24T18:09:47+00:00

Explain why clones of the LM75 are generally not detected by the
driver, and why this isn't going to change. Also update the
documentation to reflect the list of chip names currently supported by
the driver.

Signed-off-by: Jean Delvare 
Signed-off-by: Guenter Roeck

hwmon: (lm75) Add support for Analog Devices ADT75

2011-10-24T18:09:45+00:00

Add datasheet reference and device ID for ADT75.

The ADT75, like some other LM75 derivatives, needs to be instantiated
using methods 1, 2, or 4.
For more information see Documentation/i2c/instantiating-devices.

Signed-off-by: Michael Hennerich 
Acked-by: Jonathan Cameron 
Acked-by: Jean Delvare 
Signed-off-by: Guenter Roeck