[libgpiod][PATCH v2 4/5] bindings: python: provide the chip_name property in line_request

[Bartosz Golaszewski <brgl@bgdev.pl>]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Provide a wrapper around gpiod_line_request_get_chip_name() for Python
bindings and update the tests.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 bindings/python/gpiod/chip.py               |  1 +
 bindings/python/gpiod/ext/request.c         | 11 +++++++++++
 bindings/python/gpiod/line_request.py       | 12 ++++++++++--
 bindings/python/tests/tests_line_request.py | 13 ++++++++-----
 4 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/bindings/python/gpiod/chip.py b/bindings/python/gpiod/chip.py
index da93370..b3d8e61 100644
--- a/bindings/python/gpiod/chip.py
+++ b/bindings/python/gpiod/chip.py
@@ -315,6 +315,7 @@ class Chip:
         req_internal = self._chip.request_lines(line_cfg, consumer, event_buffer_size)
         request = LineRequest(req_internal)
 
+        request._chip_name = req_internal.chip_name
         request._offsets = req_internal.offsets
         request._name_map = name_map
         request._offset_map = offset_map
diff --git a/bindings/python/gpiod/ext/request.c b/bindings/python/gpiod/ext/request.c
index a32ff8f..5db69fe 100644
--- a/bindings/python/gpiod/ext/request.c
+++ b/bindings/python/gpiod/ext/request.c
@@ -37,6 +37,13 @@ static void request_finalize(request_object *self)
 		gpiod_edge_event_buffer_free(self->buffer);
 }
 
+static PyObject *
+request_chip_name(request_object *self, void *Py_UNUSED(ignored))
+{
+	return PyUnicode_FromString(
+			gpiod_line_request_get_chip_name(self->request));
+}
+
 static PyObject *
 request_num_lines(request_object *self, void *Py_UNUSED(ignored))
 {
@@ -92,6 +99,10 @@ static PyObject *request_fd(request_object *self, void *Py_UNUSED(ignored))
 }
 
 static PyGetSetDef request_getset[] = {
+	{
+		.name = "chip_name",
+		.get = (getter)request_chip_name,
+	},
 	{
 		.name = "num_lines",
 		.get = (getter)request_num_lines,
diff --git a/bindings/python/gpiod/line_request.py b/bindings/python/gpiod/line_request.py
index 096bf18..cde298f 100644
--- a/bindings/python/gpiod/line_request.py
+++ b/bindings/python/gpiod/line_request.py
@@ -212,10 +212,18 @@ class LineRequest:
         if not self._req:
             return "<LineRequest RELEASED>"
 
-        return "<LineRequest num_lines={} offsets={} fd={}>".format(
-            self.num_lines, self.offsets, self.fd
+        return '<LineRequest chip="{}" num_lines={} offsets={} fd={}>'.format(
+            self.chip_name, self.num_lines, self.offsets, self.fd
         )
 
+    @property
+    def chip_name(self) -> str:
+        """
+        Name of the chip this request was made on.
+        """
+        self._check_released()
+        return self._chip_name
+
     @property
     def num_lines(self) -> int:
         """
diff --git a/bindings/python/tests/tests_line_request.py b/bindings/python/tests/tests_line_request.py
index aa84b9a..f99b93d 100644
--- a/bindings/python/tests/tests_line_request.py
+++ b/bindings/python/tests/tests_line_request.py
@@ -529,11 +529,14 @@ class LineRequestStringRepresentation(TestCase):
         del self.sim
 
     def test_str(self):
-        with gpiod.request_lines(self.sim.dev_path, config={(2, 6, 4, 1): None}) as req:
-            self.assertEqual(
-                str(req),
-                "<LineRequest num_lines=4 offsets=[2, 6, 4, 1] fd={}>".format(req.fd),
-            )
+        with gpiod.Chip(self.sim.dev_path) as chip:
+            with chip.request_lines(config={(2, 6, 4, 1): None}) as req:
+                self.assertEqual(
+                    str(req),
+                    '<LineRequest chip="{}" num_lines=4 offsets=[2, 6, 4, 1] fd={}>'.format(
+                        self.sim.name, req.fd
+                    ),
+                )
 
     def test_str_released(self):
         req = gpiod.request_lines(self.sim.dev_path, config={(2, 6, 4, 1): None})
-- 
2.39.2