linux-kernel - [PATCH v3 1/5] iio: ABI: Generalize ABI documentation for DAC

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Message-ID: <20240603012200.16589-2-kimseer.paller@analog.com>
Date: Mon, 3 Jun 2024 09:21:56 +0800
From: Kim Seer Paller <kimseer.paller@...log.com>
To: <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC: Jonathan Cameron <jic23@...nel.org>,
        David Lechner
	<dlechner@...libre.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Liam Girdwood
	<lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Dimitri Fedrau
	<dima.fedrau@...il.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        "Rob
 Herring" <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
        "Michael
 Hennerich" <michael.hennerich@...log.com>,
        Nuno Sá
	<noname.nuno@...il.com>,
        Kim Seer Paller <kimseer.paller@...log.com>
Subject: [PATCH v3 1/5] iio: ABI: Generalize ABI documentation for DAC

Introduces a more generalized ABI documentation for DAC. Instead of
having separate ABI files for each DAC, we now have a single ABI file
that covers the common sysfs interface for all DAC.

Co-developed-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Kim Seer Paller <kimseer.paller@...log.com>
---
 Documentation/ABI/testing/sysfs-bus-iio-dac   | 61 +++++++++++++++++++
 .../ABI/testing/sysfs-bus-iio-dac-ltc2688     | 31 ----------
 2 files changed, 61 insertions(+), 31 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac

diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac b/Documentation/ABI/testing/sysfs-bus-iio-dac
new file mode 100644
index 000000000000..36d316bb75f6
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-dac
@@ -0,0 +1,61 @@
+What:		/sys/bus/iio/devices/iio:deviceX/out_currentY_toggle_en
+KernelVersion:	5.18
+Contact:	linux-iio@...r.kernel.org
+Description:
+       		Toggle enable. Write 1 to enable toggle or 0 to disable it. This
+		is useful when one wants to change the DAC output codes. The way
+		it should be done is:
+
+        	- disable toggle operation;
+        	- change out_currentY_rawN, where N is the integer value of the symbol;
+        	- enable toggle operation.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_currentY_rawN
+KernelVersion:	5.18
+Contact:	linux-iio@...r.kernel.org
+Description:
+		This attribute has the same meaning as out_currentY_raw. It is
+		specific to toggle enabled channels and refers to the DAC output
+		code in INPUT_N (_rawN), where N is the integer value of the symbol.
+		The same scale and offset as in out_currentY_raw applies.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_currentY_symbol
+KernelVersion:	5.18
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Performs a SW switch to a predefined output symbol. This attribute
+		is specific to toggle enabled channels and allows switching between
+		multiple predefined symbols. Each symbol corresponds to a different
+		output, denoted as out_currentY_rawN, where N is the integer value
+		of the symbol. Writing an integer value N will select out_currentY_rawN.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_toggle_en
+KernelVersion:	5.18
+Contact:	linux-iio@...r.kernel.org
+Description:
+       		Toggle enable. Write 1 to enable toggle or 0 to disable it. This
+		is useful when one wants to change the DAC output codes. The way
+		it should be done is:
+
+        	- disable toggle operation;
+        	- change out_voltageY_rawN, where N is the integer value of the symbol;
+        	- enable toggle operation.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_rawN
+KernelVersion:	5.18
+Contact:	linux-iio@...r.kernel.org
+Description:
+		This attribute has the same meaning as out_currentY_raw. It is
+		specific to toggle enabled channels and refers to the DAC output
+		code in INPUT_N (_rawN), where N is the integer value of the symbol.
+		The same scale and offset as in out_currentY_raw applies.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_symbol
+KernelVersion:	5.18
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Performs a SW switch to a predefined output symbol. This attribute
+		is specific to toggle enabled channels and allows switching between
+		multiple predefined symbols. Each symbol corresponds to a different
+		output, denoted as out_voltageY_rawN, where N is the integer value
+		of the symbol. Writing an integer value N will select out_voltageY_rawN.
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
index 1c35971277ba..ae95a5477382 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
+++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
@@ -53,34 +53,3 @@ KernelVersion:	5.18
 Contact:	linux-iio@...r.kernel.org
 Description:
 		Returns the available values for the dither phase.
-
-What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_toggle_en
-KernelVersion:	5.18
-Contact:	linux-iio@...r.kernel.org
-Description:
-		Toggle enable. Write 1 to enable toggle or 0 to disable it. This is
-		useful when one wants to change the DAC output codes. The way it should
-		be done is:
-
-		- disable toggle operation;
-		- change out_voltageY_raw0 and out_voltageY_raw1;
-		- enable toggle operation.
-
-What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_raw0
-What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_raw1
-KernelVersion:	5.18
-Contact:	linux-iio@...r.kernel.org
-Description:
-		It has the same meaning as out_voltageY_raw. This attribute is
-		specific to toggle enabled channels and refers to the DAC output
-		code in INPUT_A (_raw0) and INPUT_B (_raw1). The same scale and offset
-		as in out_voltageY_raw applies.
-
-What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_symbol
-KernelVersion:	5.18
-Contact:	linux-iio@...r.kernel.org
-Description:
-		Performs a SW toggle. This attribute is specific to toggle
-		enabled channels and allows to toggle between out_voltageY_raw0
-		and out_voltageY_raw1 through software. Writing 0 will select
-		out_voltageY_raw0 while 1 selects out_voltageY_raw1.
-- 
2.34.1