linux-kernel - [PATCH v2 3/3] doc: Make sysfs-bus-iio doc more exact

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Message-ID: <41eafb0caa510cddf650cf5ff940639a184f3005.1677331779.git.mazziesaccount@gmail.com>
Date:   Sat, 25 Feb 2023 15:56:16 +0200
From:   Matti Vaittinen <mazziesaccount@...il.com>
To:     Matti Vaittinen <mazziesaccount@...il.com>,
        Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Andrea Merello <andrea.merello@....it>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Matti Vaittinen <mazziesaccount@...il.com>,
        Jagath Jog J <jagathjog1996@...il.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/3] doc: Make sysfs-bus-iio doc more exact

A few IIC channel descriptions explained used units as:
data is in foo "that can be processed into an" [unit] value. The "can be
processed into" is quite broad statement as it does not really explain
what this processing means. This makes units pretty much useless.

After discussion with Jonathan, it seems the units for these channels
should also be well-defined as for all other channels. The processing
means the standard scale and offset application that is used throughout
the IIO. Let's make it more obvious by stating that the units are [unit]
after scale ane offset are applied.

Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>
---
 Documentation/ABI/testing/sysfs-bus-iio | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 6ba34c0d9789..b435c6f065ae 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1807,8 +1807,8 @@ What:		/sys/bus/iio/devices/iio:deviceX/out_resistanceX_raw
 KernelVersion:	4.3
 Contact:	linux-iio@...r.kernel.org
 Description:
-		Raw (unscaled no offset etc.) resistance reading that can be processed
-		into an ohm value.
+		Raw (unscaled no offset etc.) resistance reading.
+		Units after application of scale and offset are ohms.
 
 What:		/sys/bus/iio/devices/iio:deviceX/heater_enable
 KernelVersion:	4.1.0
@@ -1894,8 +1894,9 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_electricalconductivity_raw
 KernelVersion:	4.8
 Contact:	linux-iio@...r.kernel.org
 Description:
-		Raw (unscaled no offset etc.) electric conductivity reading that
-		can be processed to siemens per meter.
+		Raw (unscaled no offset etc.) electric conductivity reading.
+		Units after application of scale and offset are siemens per
+		meter.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_countY_raw
 KernelVersion:	4.10
@@ -1952,7 +1953,7 @@ KernelVersion:	4.18
 Contact:	linux-iio@...r.kernel.org
 Description:
 		Raw (unscaled) phase difference reading from channel Y
-		that can be processed to radians.
+		Units after application of scale and offset are radians.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm1_input
 What:		/sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm1_input
-- 
2.39.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

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