From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date: Sat, 14 Sep 2019 13:29:48 +0000 (+0200)
Subject: bindings: python: provide Line.update()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4029c34f5c90b47653fa518fec8e54d0ef47b03d;p=qemu-gpiodev%2Flibgpiod.git

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 deeba10..69edbbc 100644
--- 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 8533bae..ed31c8e 100755
--- 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, )