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w1: w1_therm: Document Maxim MAX31850 thermoelement IF.

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w1_therm driver supports now MAX31850, too. Add it to documentation
and fix a small typo.

Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Markus Reichl 2022-03-21 13:04:11 +01:00 committed by Jonathan Corbet
parent ca3d0b5dfc
commit 7808c93412
1 changed files with 7 additions and 2 deletions
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9
Documentation/w1/slaves/w1_therm.rst
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@ -6,7 +6,8 @@ Supported chips:
* Maxim ds18*20 based temperature sensors. * Maxim ds18*20 based temperature sensors.
* Maxim ds1825 based temperature sensors. * Maxim ds1825 based temperature sensors.
* GXCAS GC20MH01 temperature sensor. * GXCAS GX20MH01 temperature sensor.
* Maxim MAX31850 thermoelement interface.
Author: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Author: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
@ -15,7 +16,7 @@ Description
----------- -----------
w1_therm provides basic temperature conversion for ds18*20, ds28ea00, GX20MH01 w1_therm provides basic temperature conversion for ds18*20, ds28ea00, GX20MH01
devices. and MAX31850 devices.
Supported family codes: Supported family codes:
@ -137,3 +138,7 @@ bits in Config register; R2 bit in Config register enabling 13 and 14 bit
resolutions. The device is powered up in 14-bit resolution mode. The conversion resolutions. The device is powered up in 14-bit resolution mode. The conversion
times specified in the datasheet are too low and have to be increased. The times specified in the datasheet are too low and have to be increased. The
device supports driver features ``1`` and ``2``. device supports driver features ``1`` and ``2``.
MAX31850 device shares family number 0x3B with DS1825. The device is generally
compatible with DS1825. The higher 4 bits of Config register read all 1,
indicating 15, but the device is always operating in 14-bit resolution mode.