2 * HTC simple EGPIO irq and gpio extender
5 #ifndef __HTC_EGPIO_H__
6 #define __HTC_EGPIO_H__
8 #include <linux/gpio.h>
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
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,
22 struct htc_egpio_chip {
26 unsigned long direction;
27 unsigned long initial_values;
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
41 struct htc_egpio_platform_data {
50 struct htc_egpio_chip *chip;
54 /* Determine the wakeup irq, to be called during early resume */
55 extern int htc_egpio_get_wakeup_irq(struct device *dev);