patch "usb: dwc2: fix STM ID/VBUS detection startup delay in" added to usb-linus

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

usb: dwc2: fix STM ID/VBUS detection startup delay in

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 fac6bf87c55f7f0733efb0375565fb6a50cf2caf Mon Sep 17 00:00:00 2001
From: Amelie Delaunay <[email protected]>
Date: Tue, 7 Dec 2021 13:45:10 +0100
Subject: usb: dwc2: fix STM ID/VBUS detection startup delay in
dwc2_driver_probe

When activate_stm_id_vb_detection is enabled, ID and Vbus detection relies on sensing comparators. This detection needs time to stabilize. A delay was already applied in dwc2_resume() when reactivating the detection, but it wasn't done in dwc2_probe().
This patch adds delay after enabling STM ID/VBUS detection. Then, ID state is good when initializing gadget and host, and avoid to get a wrong Connector ID Status Change interrupt.

---
 drivers/usb/dwc2/platform.c | 3 +++
 1 file changed, 3 insertions(+)

index c8f18f3ba9e3..c331a5128c2c 100644
@@ -575,6 +575,9 @@ static int dwc2_driver_probe(struct platform_device *dev)
 		ggpio |= GGPIO_STM32_OTG_GCCFG_IDEN;
 		ggpio |= GGPIO_STM32_OTG_GCCFG_VBDEN;
 		dwc2_writel(hsotg, ggpio, GGPIO);
+
+		/* ID/VBUS detection startup time */
+		usleep_range(5000, 7000);
 	}
 
 	retval = dwc2_drd_init(hsotg);

2.34.1