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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __DRIVERS_GENERIC_GPIO_KEYS_H__
#define __DRIVERS_GENERIC_GPIO_KEYS_H__
#include <acpi/acpi_device.h>
#include <stdint.h>
/* Linux input type */
enum {
/* Switch event */
EV_SW = 0x5,
};
/* Switch events type (Linux code emitted for EV_SW) */
enum {
SW_MUTE_DEVICE = 0xe,
SW_PEN_INSERTED = 0xf,
};
/* Trigger for wakeup event action */
enum {
EV_ACT_ANY,
EV_ACT_ASSERTED,
EV_ACT_DEASSERTED,
};
enum {
/*
* GPIO key uses SCI route to wake the system from suspend state. This is typically used
* when the input line is dual routed i.e. one for IRQ and other for SCI or if the GPIO
* controller is capable of handling the filtering for IRQ and SCI separately. This
* requires "wake" property to be provided by the board which represents the GPE # for
* wake. It is exposed as _PRW in ACPI tables.
*/
WAKEUP_ROUTE_SCI,
/*
* GPIO key uses GPIO controller IRQ route for wake. This is used when IRQ and wake are
* routed to the same pad and the GPIO controller is not capable of handling the trigger
* filtering separately for IRQ and wake. Kernel driver for gpio-keys takes care of
* reconfiguring the IRQ trigger as both edges when used in S0 and the edge requested by
* BIOS (as per wakeup_event_action) when entering suspend. In this case, _PRW is not
* exposed for the key device.
*/
WAKEUP_ROUTE_GPIO_IRQ,
/* GPIO key does not support wake. */
WAKEUP_ROUTE_DISABLED,
};
/* Details of the child node defining key */
struct key_info {
/* Device name of the child node - Mandatory */
const char *dev_name;
/* Keycode emitted for this key - Mandatory */
uint32_t linux_code;
/*
* Event type generated for this key
* See EV_* above.
*/
uint32_t linux_input_type;
/* Descriptive name of the key */
const char *label;
/* Wakeup route (if any) for the key. See WAKEUP_ROUTE_* macros above. */
unsigned int wakeup_route;
/* Wake GPE -- SCI GPE # for wake. Required for WAKEUP_ROUTE_SCI. */
unsigned int wake_gpe;
/* Trigger for Wakeup Event Action as defined in EV_ACT_* enum */
unsigned int wakeup_event_action;
/* Can this key be disabled? */
bool can_be_disabled;
/* Debounce interval time in milliseconds */
uint32_t debounce_interval;
};
struct drivers_generic_gpio_keys_config {
/* Device name of the parent gpio-keys node */
const char *name;
/* Name of the input device - Optional */
const char *label;
/* GPIO line providing the key - Mandatory */
struct acpi_gpio gpio;
/* Is this a polled GPIO button? - Optional */
bool is_polled;
/* Poll inverval - Mandatory only if GPIO is polled. */
uint32_t poll_interval;
/* Details about the key - Mandatory */
struct key_info key;
};
#endif /* __DRIVERS_GENERIC_GPIO_KEYS_H__ */
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