[PATCH] arm64: a37xx: pinctrl: probe after binding

[Robert Marko]

Currently, pinctrl drivers are getting probed during post-bind, however
that is being reverted, and on A37XX pinctrl driver is the one that
registers the GPIO driver during the probe.

So, if the pinctrl driver doesn't get probed GPIO-s won't get registered
and thus they cannot be used.

This is a problem on the Methode eDPU as it just uses SB pins as GPIO-s
and without them being registered networking won't work as it only has
one SFP slot and the TX disable GPIO is on the SB controller.

So, lets just add a flag only to A37XX driver to probe after binding
in order for the GPIO driver to always get registered.

Signed-off-by: Robert Marko <robert.marko at sartura.hr>
---
 drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index 25fbe39abd1..1be6252227d 100644
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -745,6 +745,19 @@ static int armada_37xx_pinctrl_probe(struct udevice *dev)
 	return 0;
 }
 
+static int armada_37xx_pinctrl_bind(struct udevice *dev)
+{
+	/*
+	 * Make sure that the pinctrl driver gets probed after binding
+	 * as on A37XX the pinctrl driver is the one that is also
+	 * registering the GPIO one during probe, so if its not probed
+	 * GPIO-s are not registered as well.
+	 */
+	dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND);
+
+	return 0;
+}
+
 static const struct udevice_id armada_37xx_pinctrl_of_match[] = {
 	{
 		.compatible = "marvell,armada3710-sb-pinctrl",
@@ -762,6 +775,7 @@ U_BOOT_DRIVER(armada_37xx_pinctrl) = {
 	.id = UCLASS_PINCTRL,
 	.of_match = of_match_ptr(armada_37xx_pinctrl_of_match),
 	.probe = armada_37xx_pinctrl_probe,
+	.bind = armada_37xx_pinctrl_bind,
 	.priv_auto	= sizeof(struct armada_37xx_pinctrl),
 	.ops = &armada_37xx_pinctrl_ops,
 };
-- 
2.39.0