From: Linus Walleij <[email protected]>
This makes the pinctrl_find_and_add_gpio_range() return
-EPROBE_DEFER if the range hosting pin controller cannot be
located. We may assume that the common case for why adding a
range fails is that the targe pin controller device has not
probed yet.
Signed-off-by: Linus Walleij <[email protected]>
---
drivers/pinctrl/core.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 15f5ac8..33af811 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -350,8 +350,13 @@ struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
{
struct pinctrl_dev *pctldev = get_pinctrl_dev_from_devname(devname);
+ /*
+ * If we can't find this device, let's assume that is because
+ * it has not probed yet, so the driver trying to register this
+ * range need to defer probing.
+ */
if (!pctldev)
- return NULL;
+ return ERR_PTR(-EPROBE_DEFER);
pinctrl_add_gpio_range(pctldev, range);
return pctldev;
--
1.7.11.3