text: /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * HTC simple EGPIO irq and gpio extender
   */
  
  #ifndef __HTC_EGPIO_H__
  #define __HTC_EGPIO_H__
  
  #include <linux/gpio.h>
  
  /* Descriptive values for all-in or all-out htc_egpio_chip descriptors. */
  #define HTC_EGPIO_OUTPUT (~0)
  #define HTC_EGPIO_INPUT  0
  
  /**
   * struct htc_egpio_chip - descriptor to create gpio_chip for register range
   * @reg_start: index of first register
   * @gpio_base: gpio number of first pin in this register range
   * @num_gpios: number of gpios in this register range, max BITS_PER_LONG
   *    (number of registers = DIV_ROUND_UP(num_gpios, reg_width))
   * @direction: bitfield, '0' = input, '1' = output,
   */
  struct htc_egpio_chip {
  	int           reg_start;
  	int           gpio_base;
  	int           num_gpios;
  	unsigned long direction;
  	unsigned long initial_values;
  };
  
  /**
   * struct htc_egpio_platform_data - description provided by the arch
   * @irq_base: beginning of available IRQs (eg, IRQ_BOARD_START)
   * @num_irqs: number of irqs
   * @reg_width: number of bits per register, either 8 or 16 bit
   * @bus_width: alignment of the registers, either 16 or 32 bit
   * @invert_acks: set if chip requires writing '0' to ack an irq, instead of '1'
   * @ack_register: location of the irq/ack register
   * @chip: pointer to array of htc_egpio_chip descriptors
   * @num_chips: number of egpio chip descriptors
   */
  struct htc_egpio_platform_data {
  	int                   bus_width;
  	int                   reg_width;
  
  	int                   irq_base;
  	int                   num_irqs;
  	int                   invert_acks;
  	int                   ack_register;
  
  	struct htc_egpio_chip *chip;
  	int                   num_chips;
  };
  
  /* Determine the wakeup irq, to be called during early resume */
  extern int htc_egpio_get_wakeup_irq(struct device *dev);
  
  #endif
  