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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.

Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: stable <stable@vger.kernel.org> # v4.4+
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Nicolas Ferre 2017-08-31 14:51:40 +02:00 committed by Felipe Balbi
parent addfc5823d
commit 6baeda120d
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/gadget/udc/atmel_usba_udc.c
View File

@ -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;