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4 Commits

Author SHA1 Message Date
Bartosz Golaszewski
f4fe71e940 tests: add a test case for checking invalid lines 
Add a test case for validating kernel's behavior when user-space tries
to request an invalid GPIO line.

Link: https://lore.kernel.org/r/20251006-gpiosim-valid-lines-v1-7-b399373e90a9@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2025-10-09 10:12:59 +02:00
Bartosz Golaszewski
41231df28c tests: uapi: add test-cases for open-drain and open-source emulation 
The kernel GPIO subsystem can emulate open-drain and open-source by not
actively driving the line for active and inactive output values
respectively. The kernel does it by setting the line to input in these
cases but this still must be reported as output to user-space. Add new
test-cases that verify this behavior.

Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20250410-open-drain-source-tests-v1-1-a062d2280cc5@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2025-04-16 17:59:04 +02:00
Bartosz Golaszewski
e60e38375c tests: split out reusable test code into a local static library 
In order to allow the upcoming GLib and DBus bindings to reuse the test
code, let's put all common elements into reusable libtool objects and
export the relevant symbols in internal headers.

Tested-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Link: https://lore.kernel.org/r/20240812-dbus-v5-1-ead288509217@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2024-08-13 10:38:40 +02:00
Kent Gibson
0a552e7908 tests: add enable_debounce_then_edge_detection 
A bug was recently discovered in the kernel that can result in the edge
event fifo not being correctly initialised and stack contents being
returned in edge events. The trigger for the bug is requesting a line with
debounce, but not edge detection, and then reconfiguring the line to
enable edge detection.

Add a test case that triggers the bug.  This will fail on kernels that
do not contain the fix for the bug.  The test is located in a new test
file, tests-kernel-uapi.c, intended to contain tests specifically
testing some aspect of the kernel uAPI, not libgpiod itself.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20240513160031.309139-1-warthog618@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2024-05-15 10:59:52 +02:00