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gpio: add interrupt handling capability to max732x

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Most of the GPIO expanders supported by the max732x driver have interrupt
generation capability by reporting changes on input pins through an INT#
pin.  This patch implements the irq_chip functionnality (edge detection
only).

Signed-off-by: Marc Zyngier <maz@misterjones.org>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Jebediah Huang <jebediah.huang@gmail.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marc Zyngier
2010-05-26 14:42:16 -07:00
committed by Linus Torvalds
parent 0af62f4d1e
commit a80a0bbee4
3 changed files with 346 additions and 19 deletions
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3
include/linux/i2c/max732x.h
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@@ -7,6 +7,9 @@ struct max732x_platform_data {
/* number of the first GPIO */
unsigned gpio_base;
/* interrupt base */
int irq_base;
void *context; /* param to setup/teardown */
int (*setup)(struct i2c_client *client,