max7301.h

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#ifndef LINUX_SPI_MAX7301_H
#define LINUX_SPI_MAX7301_H

#include <linux/gpio.h>

/*
 * Some registers must be read back to modify.
 * To save time we cache them here in memory
 */
struct max7301 {
    struct mutex    lock;
    u8      port_config[8]; /* field 0 is unused */
    u32     out_level;  /* cached output levels */
    u32     input_pullup_active;
    struct gpio_chip chip;
    struct device *dev;
    int (*write)(struct device *dev, unsigned int reg, unsigned int val);
    int (*read)(struct device *dev, unsigned int reg);
};

struct max7301_platform_data {
    /* number assigned to the first GPIO */
    unsigned    base;
    /*
     * bitmask controlling the pullup configuration,
     *
     * _note_ the 4 lowest bits are unused, because the first 4
     * ports of the controller are not used, too.
     */
    u32     input_pullup_active;
};

extern int __max730x_remove(struct device *dev);
extern int __max730x_probe(struct max7301 *ts);
#endif