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bcma: gpio: add own IRQ domain

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Input GPIO changes can generate interrupts, but we need kind of ACK for
them by changing IRQ polarity. This is required to stop hardware from
keep generating interrupts and generate another one on the next GPIO
state change.
This code allows using GPIOs with standard interrupts and add for
example GPIO buttons support.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6216/
This commit is contained in:
Rafał Miłecki 2013-12-12 13:46:03 +01:00 • committed by Ralf Baechle
parent 87c99203fe
commit 2997609eb4
3 changed files with 134 additions and 2 deletions
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1
include/linux/bcma/bcma_driver_chipcommon.h
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@ -640,6 +640,7 @@ struct bcma_drv_cc {
spinlock_t gpio_lock;
#ifdef CONFIG_BCMA_DRIVER_GPIO
struct gpio_chip gpio;
struct irq_domain *irq_domain;
#endif
};