@@ -60,6 +60,9 @@ enum {
gpiod_LINE_REQ_FLAG_OPEN_DRAIN = GPIOD_BIT(0),
gpiod_LINE_REQ_FLAG_OPEN_SOURCE = GPIOD_BIT(1),
gpiod_LINE_REQ_FLAG_ACTIVE_LOW = GPIOD_BIT(2),
+ gpiod_LINE_REQ_FLAG_BIAS_DISABLE = GPIOD_BIT(3),
+ gpiod_LINE_REQ_FLAG_BIAS_PULL_DOWN = GPIOD_BIT(4),
+ gpiod_LINE_REQ_FLAG_BIAS_PULL_UP = GPIOD_BIT(5),
};
enum {
@@ -72,6 +75,13 @@ enum {
gpiod_ACTIVE_LOW,
};
+enum {
+ gpiod_BIAS_AS_IS = 1,
+ gpiod_BIAS_DISABLE,
+ gpiod_BIAS_PULL_UP,
+ gpiod_BIAS_PULL_DOWN,
+};
+
enum {
gpiod_RISING_EDGE = 1,
gpiod_FALLING_EDGE,
@@ -358,6 +368,34 @@ static PyObject *gpiod_Line_active_state(gpiod_LineObject *self,
return ret;
}
+PyDoc_STRVAR(gpiod_Line_bias_doc,
+"bias() -> integer\n"
+"\n"
+"Get the bias setting of this GPIO line.");
+
+static PyObject *gpiod_Line_bias(gpiod_LineObject *self,
+ PyObject *Py_UNUSED(ignored))
+{
+ int bias;
+
+ if (gpiod_ChipIsClosed(self->owner))
+ return NULL;
+
+ bias = gpiod_line_bias(self->line);
+
+ switch (bias) {
+ case GPIOD_LINE_BIAS_PULL_UP:
+ return Py_BuildValue("I", gpiod_BIAS_PULL_UP);
+ case GPIOD_LINE_BIAS_PULL_DOWN:
+ return Py_BuildValue("I", gpiod_BIAS_PULL_DOWN);
+ case GPIOD_LINE_BIAS_DISABLE:
+ return Py_BuildValue("I", gpiod_BIAS_DISABLE);
+ case GPIOD_LINE_BIAS_AS_IS:
+ default:
+ return Py_BuildValue("I", gpiod_BIAS_AS_IS);
+ }
+}
+
PyDoc_STRVAR(gpiod_Line_is_used_doc,
"is_used() -> boolean\n"
"\n"
@@ -752,6 +790,12 @@ static PyMethodDef gpiod_Line_methods[] = {
.ml_flags = METH_NOARGS,
.ml_doc = gpiod_Line_active_state_doc,
},
+ {
+ .ml_name = "bias",
+ .ml_meth = (PyCFunction)gpiod_Line_bias,
+ .ml_flags = METH_NOARGS,
+ .ml_doc = gpiod_Line_bias_doc,
+ },
{
.ml_name = "is_used",
.ml_meth = (PyCFunction)gpiod_Line_is_used,
@@ -1030,6 +1074,12 @@ static void gpiod_MakeRequestConfig(struct gpiod_line_request_config *conf,
conf->flags |= GPIOD_LINE_REQUEST_FLAG_OPEN_SOURCE;
if (flags & gpiod_LINE_REQ_FLAG_ACTIVE_LOW)
conf->flags |= GPIOD_LINE_REQUEST_FLAG_ACTIVE_LOW;
+ if (flags & gpiod_LINE_REQ_FLAG_BIAS_DISABLE)
+ conf->flags |= GPIOD_LINE_REQUEST_FLAG_BIAS_DISABLE;
+ if (flags & gpiod_LINE_REQ_FLAG_BIAS_PULL_DOWN)
+ conf->flags |= GPIOD_LINE_REQUEST_FLAG_BIAS_PULL_DOWN;
+ if (flags & gpiod_LINE_REQ_FLAG_BIAS_PULL_UP)
+ conf->flags |= GPIOD_LINE_REQUEST_FLAG_BIAS_PULL_UP;
}
PyDoc_STRVAR(gpiod_LineBulk_request_doc,
@@ -2313,6 +2363,26 @@ static gpiod_ConstDescr gpiod_ConstList[] = {
.name = "ACTIVE_LOW",
.val = gpiod_ACTIVE_LOW,
},
+ {
+ .typeobj = &gpiod_LineType,
+ .name = "BIAS_AS_IS",
+ .val = gpiod_BIAS_AS_IS,
+ },
+ {
+ .typeobj = &gpiod_LineType,
+ .name = "BIAS_DISABLE",
+ .val = gpiod_BIAS_DISABLE,
+ },
+ {
+ .typeobj = &gpiod_LineType,
+ .name = "BIAS_PULL_UP",
+ .val = gpiod_BIAS_PULL_UP,
+ },
+ {
+ .typeobj = &gpiod_LineType,
+ .name = "BIAS_PULL_DOWN",
+ .val = gpiod_BIAS_PULL_DOWN,
+ },
{
.typeobj = &gpiod_LineEventType,
.name = "RISING_EDGE",
@@ -2381,6 +2451,18 @@ static gpiod_ModuleConst gpiod_ModuleConsts[] = {
.name = "LINE_REQ_FLAG_ACTIVE_LOW",
.value = gpiod_LINE_REQ_FLAG_ACTIVE_LOW,
},
+ {
+ .name = "LINE_REQ_FLAG_BIAS_DISABLE",
+ .value = gpiod_LINE_REQ_FLAG_BIAS_DISABLE,
+ },
+ {
+ .name = "LINE_REQ_FLAG_BIAS_PULL_DOWN",
+ .value = gpiod_LINE_REQ_FLAG_BIAS_PULL_DOWN,
+ },
+ {
+ .name = "LINE_REQ_FLAG_BIAS_PULL_UP",
+ .value = gpiod_LINE_REQ_FLAG_BIAS_PULL_UP,
+ },
{ }
};
Add support for bias flags in line requests and returning the line bias setting via a bias accessor. Based on initial work by Drew Fustini <drew@pdp7.com>. Signed-off-by: Kent Gibson <warthog618@gmail.com> --- bindings/python/gpiodmodule.c | 82 +++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+)