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