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  */
  10 struct 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
  21 struct 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
  33 extern int __max730x_remove(struct device *dev);
  34 extern int __max730x_probe(struct max7301 *ts);
  35 #endif