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, '' = input, '1' = output,
21 */
22 struct 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 '' 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 */
41 struct 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 */
55 extern int htc_egpio_get_wakeup_irq(struct device *dev);
56
57 #endif
58
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