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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef LINUX_SPI_MAX7301_H
   3#define LINUX_SPI_MAX7301_H
   4
   5#include <linux/gpio.h>
   6
   7/*
   8 * Some registers must be read back to modify.
   9 * To save time we cache them here in memory
  10 */
  11struct max7301 {
  12        struct mutex    lock;
  13        u8              port_config[8]; /* field 0 is unused */
  14        u32             out_level;      /* cached output levels */
  15        u32             input_pullup_active;
  16        struct gpio_chip chip;
  17        struct device *dev;
  18        int (*write)(struct device *dev, unsigned int reg, unsigned int val);
  19        int (*read)(struct device *dev, unsigned int reg);
  20};
  21
  22struct max7301_platform_data {
  23        /* number assigned to the first GPIO */
  24        unsigned        base;
  25        /*
  26         * bitmask controlling the pullup configuration,
  27         *
  28         * _note_ the 4 lowest bits are unused, because the first 4
  29         * ports of the controller are not used, too.
  30         */
  31        u32             input_pullup_active;
  32};
  33
  34extern int __max730x_remove(struct device *dev);
  35extern int __max730x_probe(struct max7301 *ts);
  36#endif
  37