patch "usb: dwc3: omap: improve extcon initialization" added to usb-linus

This is a note to let you know that I've just added the patch titled

usb: dwc3: omap: improve extcon initialization

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From e17b02d4970913233d543c79c9c66e72cac05bdd Mon Sep 17 00:00:00 2001
From: Marcel Hamer <[email protected]>
Date: Tue, 27 Apr 2021 14:21:18 +0200
Subject: usb: dwc3: omap: improve extcon initialization

When extcon is used in combination with dwc3, it is assumed that the dwc3 registers are untouched and as such are only configured if VBUS is valid or ID is tied to ground.

In case VBUS is not valid or ID is floating, the registers are not configured as such during driver initialization, causing a wrong default state during boot.

If the registers are not in a default state, because they are for instance touched by a boot loader, this can cause for a kernel error.

---
 drivers/usb/dwc3/dwc3-omap.c | 5 +++++
 1 file changed, 5 insertions(+)

index 3db17806e92e..e196673f5c64 100644
@@ -437,8 +437,13 @@ static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
 
 		if (extcon_get_state(edev, EXTCON_USB) == true)
 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
+		else
+			dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
+
 		if (extcon_get_state(edev, EXTCON_USB_HOST) == true)
 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
+		else
+			dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
 
 		omap->edev = edev;
 	}

2.31.1