pca953x.h

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#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 */
    u32     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);
    const char  *const *names;
};

#endif /* _LINUX_PCA953X_H */