bindings: python: provide Line.update()

Python bindings are missing the functionality provided by the core C
library's gpiod_line_update(). Extend the Line class with the update()
method that allows to re-read the line information from the kernel.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/bindings/python/gpiodmodule.c b/bindings/python/gpiodmodule.c
index deeba10c4586c3c210b9e599c528baeffd970fda..69edbbca874ceb9e6d6f8819cd106a8469426678 100644 (file)
--- a/bindings/python/gpiodmodule.c
+++ b/bindings/python/gpiodmodule.c
@@ -582,6 +582,25 @@ static PyObject *gpiod_Line_release(gpiod_LineObject *self,
        return ret;
 }
 
+PyDoc_STRVAR(gpiod_Line_update_doc,
+"update() -> None\n"
+"\n"
+"Re-read the line information from the kernel.");
+
+static PyObject *gpiod_Line_update(gpiod_LineObject *self,
+                                  PyObject *Py_UNUSED(ignored))
+{
+       int ret;
+
+       ret = gpiod_line_update(self->line);
+       if (ret) {
+               PyErr_SetFromErrno(PyExc_OSError);
+               return NULL;
+       }
+
+       Py_RETURN_NONE;
+}
+
 PyDoc_STRVAR(gpiod_Line_event_wait_doc,
 "event_wait([sec[ ,nsec]]) -> boolean\n"
 "\n"
@@ -783,6 +802,12 @@ static PyMethodDef gpiod_Line_methods[] = {
                .ml_flags = METH_NOARGS,
                .ml_doc = gpiod_Line_release_doc,
        },
+       {
+               .ml_name = "update",
+               .ml_meth = (PyCFunction)gpiod_Line_update,
+               .ml_flags = METH_NOARGS,
+               .ml_doc = gpiod_Line_update_doc,
+       },
        {
                .ml_name = "event_wait",
                .ml_meth = (PyCFunction)(void (*)(void))gpiod_Line_event_wait,

diff --git a/bindings/python/tests/gpiod_py_test.py b/bindings/python/tests/gpiod_py_test.py
index 8533bae340e399f987209e7744a843bf270adbb9..ed31c8e8909a83449897b0d0d60cd0e32db03883 100755 (executable)
--- a/bindings/python/tests/gpiod_py_test.py
+++ b/bindings/python/tests/gpiod_py_test.py
@@ -307,6 +307,11 @@ class LineInfo(MockupTestCase):
             self.assertTrue(line.is_open_drain())
             self.assertFalse(line.is_open_source())
 
+    def test_update_line_info(self):
+        with gpiod.Chip(mockup.chip_name(0)) as chip:
+            line = chip.get_line(3)
+            line.update()
+
 class LineValues(MockupTestCase):
 
     chip_sizes = ( 8, )