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Subject[PATCH RFC] iio: Documentation: move incompatible ABI to obsolete
Date
Commit 63cd35f34d2e ("iio: Documentation: update definitions for bufferY and scan_elements")
updated iio documentation in order to point to the newly
per-buffer API, as it is now possible to support multi buffers.

While the previous ABI will be kept forever, the best is
for applications to use the 5.11+ ABI. So, move the
legacy one ABI/obsolete.

This fixes an issue with scripts/get_abi.pl, that doesn't
accept two different Kernel version support for the same
API set.

Fixes: 63cd35f34d2e ("iio: Documentation: update definitions for bufferY and scan_elements")

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
Documentation/ABI/obsolete/sysfs-bus-iio | 98 ++++++++++++++++++++++++
Documentation/ABI/testing/sysfs-bus-iio | 38 ---------
2 files changed, 98 insertions(+), 38 deletions(-)
create mode 100644 Documentation/ABI/obsolete/sysfs-bus-iio

diff --git a/Documentation/ABI/obsolete/sysfs-bus-iio b/Documentation/ABI/obsolete/sysfs-bus-iio
new file mode 100644
index 000000000000..e1ca7e7b1c4b
--- /dev/null
+++ b/Documentation/ABI/obsolete/sysfs-bus-iio
@@ -0,0 +1,98 @@
+What: /sys/bus/iio/devices/iio:deviceX/buffer/length
+KernelVersion: 2.6.35
+Contact: linux-iio@vger.kernel.org
+Description:
+ Number of scans contained by the buffer.
+
+ Since Kernel 5.11, multiple buffers are supported.
+ so, it is better to use, instead:
+ /sys/bus/iio/devices/iio:deviceX/bufferY/length
+
+What: /sys/bus/iio/devices/iio:deviceX/buffer/enable
+KernelVersion: 2.6.35
+Contact: linux-iio@vger.kernel.org
+Description:
+ Actually start the buffer capture up. Will start trigger
+ if first device and appropriate.
+
+ Since Kernel 5.11, multiple buffers are supported.
+ so, it is better to use, instead:
+ /sys/bus/iio/devices/iio:deviceX/bufferY/enable
+
+What: /sys/bus/iio/devices/iio:deviceX/scan_elements
+KernelVersion: 2.6.37
+Contact: linux-iio@vger.kernel.org
+Description:
+ Directory containing interfaces for elements that will be
+ captured for a single triggered sample set in the buffer.
+
+ Since kernel 5.11 the scan_elements attributes are merged into
+ the bufferY directory, to be configurable per buffer.
+
+What: /sys/.../iio:deviceX/scan_elements/in_accel_x_en
+What: /sys/.../iio:deviceX/scan_elements/in_accel_y_en
+What: /sys/.../iio:deviceX/scan_elements/in_accel_z_en
+What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_en
+What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_en
+What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
+What: /sys/.../iio:deviceX/scan_elements/in_magn_x_en
+What: /sys/.../iio:deviceX/scan_elements/in_magn_y_en
+What: /sys/.../iio:deviceX/scan_elements/in_magn_z_en
+What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_en
+What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_en
+What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_en
+What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_en
+What: /sys/.../iio:deviceX/scan_elements/in_timestamp_en
+What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
+What: /sys/.../iio:deviceX/scan_elements/in_voltageY_en
+What: /sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
+What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
+What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
+What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_en
+What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_en
+What: /sys/.../iio:deviceX/scan_elements/in_incli_x_en
+What: /sys/.../iio:deviceX/scan_elements/in_incli_y_en
+What: /sys/.../iio:deviceX/scan_elements/in_pressureY_en
+What: /sys/.../iio:deviceX/scan_elements/in_pressure_en
+What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
+What: /sys/.../iio:deviceX/scan_elements/in_proximity_en
+KernelVersion: 2.6.37
+Contact: linux-iio@vger.kernel.org
+Description:
+ Scan element control for triggered data capture.
+
+What: /sys/bus/iio/devices/iio:deviceX/buffer/watermark
+KernelVersion: 4.2
+Contact: linux-iio@vger.kernel.org
+Description:
+ A single positive integer specifying the maximum number of scan
+ elements to wait for.
+
+ Poll will block until the watermark is reached.
+
+ Blocking read will wait until the minimum between the requested
+ read amount or the low water mark is available.
+
+ Non-blocking read will retrieve the available samples from the
+ buffer even if there are less samples then watermark level. This
+ allows the application to block on poll with a timeout and read
+ the available samples after the timeout expires and thus have a
+ maximum delay guarantee.
+
+ Since Kernel 5.11, multiple buffers are supported.
+ so, it is better to use, instead:
+ /sys/bus/iio/devices/iio:deviceX/bufferY/watermark
+
+What: /sys/bus/iio/devices/iio:deviceX/buffer/data_available
+KernelVersion: 4.16
+Contact: linux-iio@vger.kernel.org
+Description:
+ A read-only value indicating the bytes of data available in the
+ buffer. In the case of an output buffer, this indicates the
+ amount of empty space available to write data to. In the case of
+ an input buffer, this indicates the amount of data available for
+ reading.
+
+ Since Kernel 5.11, multiple buffers are supported.
+ so, it is better to use, instead:
+ /sys/bus/iio/devices/iio:deviceX/bufferY/data_available
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 433fe0ab74be..03a09eda896f 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1195,16 +1195,12 @@ Description:
The name of the trigger source being used, as per string given
in /sys/class/iio/triggerY/name.

-What: /sys/bus/iio/devices/iio:deviceX/buffer/length
-KernelVersion: 2.6.35
What: /sys/bus/iio/devices/iio:deviceX/bufferY/length
KernelVersion: 5.11
Contact: linux-iio@vger.kernel.org
Description:
Number of scans contained by the buffer.

-What: /sys/bus/iio/devices/iio:deviceX/buffer/enable
-KernelVersion: 2.6.35
What: /sys/bus/iio/devices/iio:deviceX/bufferY/enable
KernelVersion: 5.11
Contact: linux-iio@vger.kernel.org
@@ -1212,8 +1208,6 @@ Description:
Actually start the buffer capture up. Will start trigger
if first device and appropriate.

-What: /sys/bus/iio/devices/iio:deviceX/scan_elements
-KernelVersion: 2.6.37
What: /sys/bus/iio/devices/iio:deviceX/bufferY
KernelVersion: 5.11
Contact: linux-iio@vger.kernel.org
@@ -1224,34 +1218,6 @@ Description:
Since kernel 5.11 the scan_elements attributes are merged into
the bufferY directory, to be configurable per buffer.

-What: /sys/.../iio:deviceX/scan_elements/in_accel_x_en
-What: /sys/.../iio:deviceX/scan_elements/in_accel_y_en
-What: /sys/.../iio:deviceX/scan_elements/in_accel_z_en
-What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_en
-What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_en
-What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
-What: /sys/.../iio:deviceX/scan_elements/in_magn_x_en
-What: /sys/.../iio:deviceX/scan_elements/in_magn_y_en
-What: /sys/.../iio:deviceX/scan_elements/in_magn_z_en
-What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_en
-What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_en
-What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_en
-What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_en
-What: /sys/.../iio:deviceX/scan_elements/in_timestamp_en
-What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
-What: /sys/.../iio:deviceX/scan_elements/in_voltageY_en
-What: /sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
-What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
-What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
-What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_en
-What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_en
-What: /sys/.../iio:deviceX/scan_elements/in_incli_x_en
-What: /sys/.../iio:deviceX/scan_elements/in_incli_y_en
-What: /sys/.../iio:deviceX/scan_elements/in_pressureY_en
-What: /sys/.../iio:deviceX/scan_elements/in_pressure_en
-What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
-What: /sys/.../iio:deviceX/scan_elements/in_proximity_en
-KernelVersion: 2.6.37
What: /sys/.../iio:deviceX/bufferY/in_accel_x_en
What: /sys/.../iio:deviceX/bufferY/in_accel_y_en
What: /sys/.../iio:deviceX/bufferY/in_accel_z_en
@@ -1613,8 +1579,6 @@ Description:
Specifies number of seconds in which we compute the steps
that occur in order to decide if the consumer is making steps.

-What: /sys/bus/iio/devices/iio:deviceX/buffer/watermark
-KernelVersion: 4.2
What: /sys/bus/iio/devices/iio:deviceX/bufferY/watermark
KernelVersion: 5.11
Contact: linux-iio@vger.kernel.org
@@ -1633,8 +1597,6 @@ Description:
the available samples after the timeout expires and thus have a
maximum delay guarantee.

-What: /sys/bus/iio/devices/iio:deviceX/buffer/data_available
-KernelVersion: 4.16
What: /sys/bus/iio/devices/iio:deviceX/bufferY/data_available
KernelVersion: 5.11
Contact: linux-iio@vger.kernel.org
--
2.30.2
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