openpic: fix CTPR and de-assertion of interrupts
Properly implement level-triggered interrupts by withdrawing an interrupt from the raised queue if the interrupt source de-asserts. Also withdraw from the raised queue if the interrupt becomes masked. When CTPR is written, check whether we need to raise or lower the interrupt output. Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NAlexander Graf <agraf@suse.de>
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