/*
?*?Driver?for?keys?on?GPIO?lines?capable?of?generating?interrupts.
?*
?*?Copyright?2005?Phil?Blundell
?*?Copyright?2010?2011?David?Jander?
?*
?*?This?program?is?free?software;?you?can?redistribute?it?and/or?modify
?*?it?under?the?terms?of?the?GNU?General?Public?License?version?2?as
?*?published?by?the?Free?Software?Foundation.
?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include???//20190408
#include???//20190412
#include?
#include?
#include?
#include?
#include?
#include?
#include?

struct?gpio_ec11_data?{
	const?struct?gpio_ec11_button?*button;??//20190408
	struct?input_dev?*input;

	struct?timer_list?release_timer;
	unsigned?int?release_delay;	/*?in?msecs?for?IRQ-only?buttons?*/

	struct?delayed_work?work;
	unsigned?int?software_debounce;	/*?in?msecs?for?GPIO-driven?buttons?*/

	unsigned?int?irq;
	spinlock_t?lock;
	bool?disabled;
	bool?key_pressed;
};

struct?gpio_ec11_drvdata?{
	const?struct?gpio_ec11_platform_data?*pdata;??//20190408
	struct?input_dev?*input;
	struct?mutex?disable_lock;
	struct?gpio_ec11_data?data[0];????//20190408
};

/*
?*?SYSFS?interface?for?enabling/disabling?keys?and?switches:
?*
?*?There?are?4?attributes?under?/sys/devices/platform/gpio-keys/
?*	keys?[ro]??????????????-?bitmap?of?keys?（EV_KEY）?which?can?be
?*	?????????????????????????disabled
?*	switches?[ro]??????????-?bitmap?of?switches?（EV_SW）?which?can?be
?*	?????????????????????????disabled
?*	disabled_keys?[rw]?????-?bitmap?of?keys?currently?disabled
?*	disabled_switches?[rw]?-?bitmap?of?switches?currently?disabled
?*
?*?Userland?can?change?these?values?and?hence?disable?event?generation
?*?for?each?key?（or?switch）.?Disabling?a?key?means?its?interrupt?line
?*?is?disabled.
?*
?*?For?example?if?we?have?following?switches?set?up?as?gpio-keys:
?*	SW_DOCK?=?5
?*	SW_CAMERA_LENS_COVER?=?9
?*	SW_KEYPAD_SLIDE?=?10
?*	SW_FRONT_PROXIMITY?=?11
?*?This?is?read?from?switches:
?*	11-95
?*?Next?we?want?to?disable?proximity?（11）?and?dock?（5）?we?write:
?*	115
?*?to?file?disabled_switches.?Now?proximity?and?dock?IRQs?are?disabled.
?*?This?can?be?verified?by?reading?the?file?disabled_switches:
?*	115
?*?If?we?now?want?to?enable?proximity?（11）?switch?we?write:
?*	5
?*?to?disabled_switches.
?*
?*?We?can?disable?only?those?keys?which?don‘t?allow?sharing?the?irq.
?*/

/**
?*?get_n_events_by_type（）?-?returns?maximum?number?of?events?per?@type
?*?@type:?type?of?button?（%EV_KEY?%EV_SW）
?*
?*?Return?value?of?this?function?can?be?used?to?allocate?bitmap
?*?large?enough?to?hold?all?bits?for?given?type.
?*/
static?int?get_n_even