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/include/linux/mfd/htc-egpio.h

https://github.com/airy09/android_kernel_sony_apq8064
C Header | 57 lines | 24 code | 9 blank | 24 comment | 0 complexity | a70ede2981affaff0cec04050082d45c MD5 | raw file
 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