linux-kernel - [PATCH v2 1/5] iio: ABI: Generalize ABI documentation for DAC

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Date: Thu, 23 May 2024 11:19:05 +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>
Subject: [PATCH v2 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 ----------
 MAINTAINERS                                   |  8 +++
 3 files changed, 69 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..53d5213520c6
--- /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_raw0 and out_currentY_raw1;
+		- enable toggle operation.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_currentY_raw0
+What:		/sys/bus/iio/devices/iio:deviceX/out_currentY_raw1
+KernelVersion:	5.18
+Contact:	linux-iio@...r.kernel.org
+Description:
+		It has the same meaning as out_currentY_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_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 toggle. This attribute is specific to toggle
+		enabled channels and allows to toggle between out_currentY_raw0
+		and out_currentY_raw1 through software. Writing 0 will select
+		out_currentY_raw0 while 1 selects out_currentY_raw1.
+
+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.
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.
diff --git a/MAINTAINERS b/MAINTAINERS
index 758c202ec712..b3be54c09159 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12850,6 +12850,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
 F:	drivers/iio/dac/ltc1660.c
 
+LTC2664 IIO DAC DRIVER
+M:	Michael Hennerich <michael.hennerich@...log.com>
+M:	Kim Seer Paller <kimseer.paller@...log.com>
+L:	linux-iio@...r.kernel.org
+S:	Supported
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/ABI/testing/sysfs-bus-iio-dac
+
 LTC2688 IIO DAC DRIVER
 M:	Nuno Sá <nuno.sa@...log.com>
 L:	linux-iio@...r.kernel.org
-- 
2.34.1