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.
Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com>
https://patch.msgid.link/20240718051834.32270-2-kimseer.paller@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/ABI/testing/sysfs-bus-iio-dac

+What:		/sys/bus/iio/devices/iio:deviceX/out_currentY_toggle_en
+KernelVersion:	5.18
+Contact:	linux-iio@vger.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. For
+		autonomous toggling, 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@vger.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@vger.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@vger.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. For
+		autonomous toggling, 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@vger.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@vger.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.

Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688

@@ -53,34 +53,3 @@ KernelVersion:	5.18
 Contact:	linux-iio@vger.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@vger.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@vger.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@vger.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.