spi: pxa2xx: Prepare for edge-triggered interrupts

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When using the a device with edge-triggered interrupts, such as MSIs,
the interrupt handler has to ensure that there is a point in time during
its execution where all interrupts sources are silent so that a new
event can trigger a new interrupt again.

This is achieved here by disabling all interrupt sources for a moment
before processing them according to the status register. If a new
interrupt should have arrived after we read the status, it will now
re-trigger the interrupt, even in edge mode.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Jan Kiszka 2017-01-21 10:06:38 +01:00 • committed by Mark Brown

parent b03124825b

commit e51e9b9304

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drivers/spi/spi-pxa2xx.c

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