linux-kernel - [RFC 3/4] docs: driver-api: generic-counter: Update Count and Signal data types

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Date:   Sun, 15 Sep 2019 14:57:58 +0900
From:   William Breathitt Gray <vilhelm.gray@...il.com>
To:     jic23@...23.retrosnub.co.uk
Cc:     linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        William Breathitt Gray <vilhelm.gray@...il.com>
Subject: [RFC 3/4] docs: driver-api: generic-counter: Update Count and Signal data types

Count data is now always represented as an unsigned integer, while
Signal data is either SIGNAL_LOW or SIGNAL_HIGH.

Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
---
 Documentation/driver-api/generic-counter.rst | 22 +++++++-------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/Documentation/driver-api/generic-counter.rst b/Documentation/driver-api/generic-counter.rst
index 8382f01a53e3..161652fc1025 100644
--- a/Documentation/driver-api/generic-counter.rst
+++ b/Documentation/driver-api/generic-counter.rst
@@ -39,10 +39,7 @@ There are three core components to a counter:
 COUNT
 -----
 A Count represents the count data for a set of Signals. The Generic
-Counter interface provides the following available count data types:
-
-* COUNT_POSITION:
-  Unsigned integer value representing position.
+Counter interface represents the count data as an unsigned integer.
 
 A Count has a count function mode which represents the update behavior
 for the count data. The Generic Counter interface provides the following
@@ -93,19 +90,16 @@ SIGNAL
 A Signal represents a counter input data; this is the input data that is
 evaluated by the counter to determine the count data; e.g. a quadrature
 signal output line of a rotary encoder. Not all counter devices provide
-user access to the Signal data.
-
-The Generic Counter interface provides the following available signal
-data types for when the Signal data is available for user access:
+user access to the Signal data, so exposure is optional for drivers.
 
-* SIGNAL_LEVEL:
-  Signal line state level. The following states are possible:
+When the Signal data is available for user access, the Generic Counter
+interface provides the following available signal values:
 
-  - SIGNAL_LEVEL_LOW:
-    Signal line is in a low state.
+* SIGNAL_LOW:
+  Signal line is in a low state.
 
-  - SIGNAL_LEVEL_HIGH:
-    Signal line is in a high state.
+* SIGNAL_HIGH:
+  Signal line is in a high state.
 
 A Signal may be associated with one or more Counts.
 
-- 
2.23.0