linux-kernel - [PATCH v2 9/9] iio: ABI: add DAC sysfs synchronous

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Message-Id: <20240905-wip-bl-ad3552r-axi-v0-iio-testing-v2-9-87d669674c00@baylibre.com>
Date: Thu, 05 Sep 2024 17:17:39 +0200
From: Angelo Dureghello <adureghello@...libre.com>
To: Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Olivier Moysan <olivier.moysan@...s.st.com>
Cc: linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, David Lechner <dlechner@...libre.com>, 
 Angelo Dureghello <adureghello@...libre.com>
Subject: [PATCH v2 9/9] iio: ABI: add DAC sysfs synchronous_mode parameter

From: Angelo Dureghello <adureghello@...libre.com>

Some DACs as ad3552r need a synchronous mode setting, adding
this parameter for ad3552r and for future use on other DACs,
if needed.

Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
---
 Documentation/ABI/testing/sysfs-bus-iio-dac | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac b/Documentation/ABI/testing/sysfs-bus-iio-dac
index 810eaac5533c..2f4960c79385 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio-dac
+++ b/Documentation/ABI/testing/sysfs-bus-iio-dac
@@ -59,3 +59,19 @@ Description:
 		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.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_voltage_synchronous_mode
+KernelVersion:	6.13
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Arm or disarm a wait-for-synchronization flag. Arming this flag
+		means the DAC will wait for a synchronizatiopn signal on a
+		specific internal or external wired connection. I.e., there are
+		cases where multiple DACs IP are built in the same chip or fpga
+		design, and they need to start the data stream synchronized.
+
+What:		/sys/bus/iio/devices/iio:deviceX/out_voltage_synchronous_mode_available
+KernelVersion:	6.13
+Contact:	linux-iio@...r.kernel.org
+Description:
+		List of available values for synchronous_mode.

-- 
2.45.0.rc1