From: Josep Orga <jorga@somdevices.com>
Date: Tue, 7 Nov 2023 18:50:04 +0000 (+0100)
Subject: usb: dwc3: drd: Add support for usb-conn-gpio based usb-role-switch
X-Git-Tag: rel_imx_5.10.35_2.0.0-somdevices.3~2
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=f006496b255a9f75a09f18e8853ffec25f10bc37;p=linux.git

usb: dwc3: drd: Add support for usb-conn-gpio based usb-role-switch

usb-conn-gpio devices are a subnode of the USB interface controller, which
needs to be populated.
This allows having a non-type-c connector providing dual-role.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220105071407.2240302-1-alexander.stein@ew.tq-group.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index 7528c36b02b6..3cf1b19260b5 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -9,6 +9,7 @@
 
 #include <linux/extcon.h>
 #include <linux/of_graph.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
 
@@ -565,6 +566,18 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc)
 	if (IS_ERR(dwc->role_sw))
 		return PTR_ERR(dwc->role_sw);
 
+	if (IS_ENABLED(CONFIG_OF)) {
+		/* populate connector entry */
+		int ret = devm_of_platform_populate(dwc->dev);
+
+		if (ret) {
+			usb_role_switch_unregister(dwc->role_sw);
+			dwc->role_sw = NULL;
+			dev_err(dwc->dev, "DWC3 platform devices creation failed: %i\n", ret);
+			return ret;
+		}
+	}
+
 	dwc3_set_mode(dwc, mode);
 	return 0;
 }