[PATCH v6 1/4] usb: dwc3: of-simple: bail probe if no dwc3 child node

Johan Jonker
2021-04-01T21:37:08Z

For some of the dwc3-of-simple compatible SoCs we
don't want to bind this driver to a dwc3 node,
but bind that node to the 'snps,dwc3' driver instead.
The kernel has no logic to decide which driver to bind
to if there are 2 matching drivers, so bail probe if no
dwc3 child node.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
---
drivers/usb/dwc3/dwc3-of-simple.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index 71fd620c5..8d3baa5df 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -38,6 +38,10 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)

int ret;

+ /* Bail probe if no dwc3 child node. */
+ if (!of_get_compatible_child(dev->of_node, "snps,dwc3"))
+ return -ENODEV;
+
simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL);
if (!simple)
return -ENOMEM;
--
2.11.0