LXR linux/include/linux/spi/max7301.h

   1#ifndef LINUX_SPI_MAX7301_H
   2#define LINUX_SPI_MAX7301_H
   3
   4#include <linux/gpio.h>
   5
   6/*
   7 * Some registers must be read back to modify.
   8 * To save time we cache them here in memory
   9 */
  10struct max7301 {
  11        struct mutex    lock;
  12        u8              port_config[8]; /* field 0 is unused */
  13        u32             out_level;      /* cached output levels */
  14        u32             input_pullup_active;
  15        struct gpio_chip chip;
  16        struct device *dev;
  17        int (*write)(struct device *dev, unsigned int reg, unsigned int val);
  18        int (*read)(struct device *dev, unsigned int reg);
  19};
  20
  21struct max7301_platform_data {
  22        /* number assigned to the first GPIO */
  23        unsigned        base;
  24        /*
  25         * bitmask controlling the pullup configuration,
  26         *
  27         * _note_ the 4 lowest bits are unused, because the first 4
  28         * ports of the controller are not used, too.
  29         */
  30        u32             input_pullup_active;
  31};
  32
  33extern int __max730x_remove(struct device *dev);
  34extern int __max730x_probe(struct max7301 *ts);
  35#endif
  36