KEY_FN_F7 (reference) in projects: Linux-v4.19

/Linux-v4.19/include/dt-bindings/input/
D	linux-event-codes.h	`530 #define KEY_FN_F7 0x1d8 macro`
/Linux-v4.19/include/uapi/linux/
D	input-event-codes.h	`530 #define KEY_FN_F7 0x1d8 macro`
/Linux-v4.19/drivers/hid/
D	hid-debug.c	`935 [KEY_FN_F7] = "Fn+F7", [KEY_FN_F8] = "Fn+F8",`
/Linux-v4.19/sound/usb/caiaq/
D	input.c	`38 KEY_FN_F7, /* "lcd backlight */`
/Linux-v4.19/drivers/char/
D	sonypi.c	`448 { SONYPI_EVENT_FNKEY_F7, KEY_FN_F7 },`
/Linux-v4.19/drivers/platform/x86/
D	sony-laptop.c	`314 KEY_FN_F7, /* 11 SONYPI_EVENT_FNKEY_F7 */`