1/* 2 * HTC simple EGPIO irq and gpio extender 3 */ 4 5#ifndef __HTC_EGPIO_H__ 6#define __HTC_EGPIO_H__ 7 8#include <linux/gpio.h> 9 10/* Descriptive values for all-in or all-out htc_egpio_chip descriptors. */ 11#define HTC_EGPIO_OUTPUT (~0) 12#define HTC_EGPIO_INPUT 0 13 14/** 15 * struct htc_egpio_chip - descriptor to create gpio_chip for register range 16 * @reg_start: index of first register 17 * @gpio_base: gpio number of first pin in this register range 18 * @num_gpios: number of gpios in this register range, max BITS_PER_LONG 19 * (number of registers = DIV_ROUND_UP(num_gpios, reg_width)) 20 * @direction: bitfield, '0' = input, '1' = output, 21 */ 22struct htc_egpio_chip { 23 int reg_start; 24 int gpio_base; 25 int num_gpios; 26 unsigned long direction; 27 unsigned long initial_values; 28}; 29 30/** 31 * struct htc_egpio_platform_data - description provided by the arch 32 * @irq_base: beginning of available IRQs (eg, IRQ_BOARD_START) 33 * @num_irqs: number of irqs 34 * @reg_width: number of bits per register, either 8 or 16 bit 35 * @bus_width: alignment of the registers, either 16 or 32 bit 36 * @invert_acks: set if chip requires writing '0' to ack an irq, instead of '1' 37 * @ack_register: location of the irq/ack register 38 * @chip: pointer to array of htc_egpio_chip descriptors 39 * @num_chips: number of egpio chip descriptors 40 */ 41struct htc_egpio_platform_data { 42 int bus_width; 43 int reg_width; 44 45 int irq_base; 46 int num_irqs; 47 int invert_acks; 48 int ack_register; 49 50 struct htc_egpio_chip *chip; 51 int num_chips; 52}; 53 54/* Determine the wakeup irq, to be called during early resume */ 55extern int htc_egpio_get_wakeup_irq(struct device *dev); 56 57#endif 58