patch "usb: gadget: udc: atmel: set vbus irqflags explicitly" added to usb-linus

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

usb: gadget: udc: atmel: set vbus irqflags explicitly

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: Nicolas Ferre <[email protected]>
Date: Thu, 31 Aug 2017 14:51:40 +0200
Subject: usb: gadget: udc: atmel: set vbus irqflags explicitly

The driver triggers actions on both edges of the vbus signal.

The former PIO controller was triggering IRQs on both falling and rising edges by default. Newer PIO controller don't, so it's better to set it explicitly to IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING.

Without this patch we may trigger the connection with host but only on some bouncing signal conditions and thus lose connecting events.

---
 drivers/usb/gadget/udc/atmel_usba_udc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index 98d71400f8a1..a884c022df7a 100644
@@ -29,6 +29,8 @@
 #include <linux/of_gpio.h>
 
 #include "atmel_usba_udc.h"
+#define USBA_VBUS_IRQFLAGS (IRQF_ONESHOT \
+			   | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING)
 
 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 #include <linux/debugfs.h>

@@ -2361,7 +2363,7 @@ static int usba_udc_probe(struct platform_device *pdev)
 					IRQ_NOAUTOEN);
 			ret = devm_request_threaded_irq(&pdev->dev,
 					gpio_to_irq(udc->vbus_pin), NULL,
-					usba_vbus_irq_thread, IRQF_ONESHOT,
+					usba_vbus_irq_thread, USBA_VBUS_IRQFLAGS,
 					"atmel_usba_udc", udc);
 			if (ret) {
 				udc->vbus_pin = -ENODEV;

2.14.1