[PATCH 1/2] usb: dwc3-generic: set "mode" based on caller of dwc3_generic_probe()

[Siddharth Vadapalli]

There are only two callers of "dwc3_generic_probe()", namely:
1. dwc3_generic_peripheral_probe()
2. dwc3_generic_host_probe()
Currently, the "mode" is set based on the device-tree node of the
platform device. Also, the DWC3 core doesn't support updating the "mode"
dynamically at runtime if it is set to "OTG", i.e. "OTG" is treated as a
separate mode in itself, rather than being treated as a mode which should
eventually lead to "host"/"peripheral".

Given that the callers of "dwc3_generic_probe()" clarify the expected
"mode" of the USB Controller, use that "mode" instead of the one
specified in the device-tree. This shall allow the USB Controller to
function both as a "Host" and as a "Peripheral" when the "mode" is "otg"
in the device-tree, based on the caller of "dwc3_generic_probe()".

Signed-off-by: Siddharth Vadapalli <s-vadapalli at ti.com>
---
 drivers/usb/dwc3/dwc3-generic.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index 2ab41cbae45..55e62b35c61 100644
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -51,7 +51,8 @@ struct dwc3_generic_host_priv {
 };
 
 static int dwc3_generic_probe(struct udevice *dev,
-			      struct dwc3_generic_priv *priv)
+			      struct dwc3_generic_priv *priv,
+			      enum usb_dr_mode mode)
 {
 	int rc;
 	struct dwc3_generic_plat *plat = dev_get_plat(dev);
@@ -62,7 +63,7 @@ static int dwc3_generic_probe(struct udevice *dev,
 
 	dwc3->dev = dev;
 	dwc3->maximum_speed = plat->maximum_speed;
-	dwc3->dr_mode = plat->dr_mode;
+	dwc3->dr_mode = mode;
 #if CONFIG_IS_ENABLED(OF_CONTROL)
 	dwc3_of_parse(dwc3);
 
@@ -197,7 +198,7 @@ static int dwc3_generic_peripheral_probe(struct udevice *dev)
 {
 	struct dwc3_generic_priv *priv = dev_get_priv(dev);
 
-	return dwc3_generic_probe(dev, priv);
+	return dwc3_generic_probe(dev, priv, USB_DR_MODE_PERIPHERAL);
 }
 
 static int dwc3_generic_peripheral_remove(struct udevice *dev)
@@ -241,7 +242,7 @@ static int dwc3_generic_host_probe(struct udevice *dev)
 	struct dwc3_generic_host_priv *priv = dev_get_priv(dev);
 	int rc;
 
-	rc = dwc3_generic_probe(dev, &priv->gen_priv);
+	rc = dwc3_generic_probe(dev, &priv->gen_priv, USB_DR_MODE_HOST);
 	if (rc)
 		return rc;
 
-- 
2.43.0