usb: dwc2: gadget: don't overwrite DCTL register on NAKEFF interrupts

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When receiving GINTSTS_GINNAKEFF or GINTSTS_GOUTNAKEFF interrupt,
DCTL will be overwritten with DCTL_CGOUTNAK or DCTL_CGNPINNAK values.
Instead of overwriting it, write only needed bits.

It could cause an issue if GINTSTS_GINNAKEFF or GINTSTS_GOUTNAKEFF
interrupt is received after dwc2 disabled pullup by writing
DCTL_SFTDISCON bit.
Pullup will then be re-enabled whereas it should not.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

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Gregory Herrero 2015-12-07 12:07:31 +01:00 • committed by Felipe Balbi

parent 0676c7e734

commit 3be99cd0e8

1 changed files with 2 additions and 2 deletions

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drivers/usb/dwc2/gadget.c

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