rtc: abx80x: properly handle shared IRQs

The abx80x RTC driver registers its interrupt handler with IRQF_SHARED,
but the handler always returned IRQ_HANDLED and cleared the status
register even when no interrupt source from the RTC was active.

This could cause the driver to claim interrupts belonging to other
devices sharing the same IRQ line and could also clear unrelated status
bits in the RTC status register.

Only handle the interrupt when the alarm or watchdog flags are set, and
clear only those interrupt status bits that were handled. Return
IRQ_NONE when the interrupt was not generated by the RTC.

Fixes: 718a820a303c ("rtc: abx80x: add alarm support")
Signed-off-by: Antoni Pokusinski <apokusinski01@gmail.com>
Link: https://patch.msgid.link/20260916205138.16771-5-apokusinski01@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

0 files changed, 0 insertions, 0 deletions