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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
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