mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
89ea8bbe9c
Most of the GPIO expanders controlled by the pca953x driver are able to report changes on the input pins through an *INT pin. This patch implements the irq_chip functionality (edge detection only). The driver has been tested on an Arcom Zeus. [akpm@linux-foundation.org: the compiler does inlining for us nowadays] Signed-off-by: Marc Zyngier <maz@misterjones.org> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Haojian Zhuang <haojian.zhuang@gmail.com> Cc: David Brownell <david-b@pacbell.net> Cc: Nate Case <ncase@xes-inc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
31 lines
644 B
C
31 lines
644 B
C
#ifndef _LINUX_PCA953X_H
|
|
#define _LINUX_PCA953X_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/i2c.h>
|
|
|
|
/* platform data for the PCA9539 16-bit I/O expander driver */
|
|
|
|
struct pca953x_platform_data {
|
|
/* number of the first GPIO */
|
|
unsigned gpio_base;
|
|
|
|
/* initial polarity inversion setting */
|
|
uint16_t invert;
|
|
|
|
/* interrupt base */
|
|
int irq_base;
|
|
|
|
void *context; /* param to setup/teardown */
|
|
|
|
int (*setup)(struct i2c_client *client,
|
|
unsigned gpio, unsigned ngpio,
|
|
void *context);
|
|
int (*teardown)(struct i2c_client *client,
|
|
unsigned gpio, unsigned ngpio,
|
|
void *context);
|
|
char **names;
|
|
};
|
|
|
|
#endif /* _LINUX_PCA953X_H */
|