nuttx/drivers/input
chao an 87f134cfaa sched/sleep: replace all Signal-based sleep implement to Scheduled sleep
Nuttx currently has 2 types of sleep interfaces:

1. Signal-scheduled sleep: nxsig_sleep() / nxsig_usleep() / nxsig_nanosleep()
Weaknesses:
a. Signal-dependent: The signal-scheduled sleep method is bound to the signal framework, while some driver sleep operations do not depend on signals.
b. Timespec conversion: Signal-scheduled sleep involves timespec conversion, which has a significant impact on performance.

2. Busy sleep: up_mdelay() / up_udelay()
Weaknesses:
a. Does not actively trigger scheduling, occupy the CPU loading.

3. New interfaces: Scheduled sleep: nxsched_sleep() / nxsched_usleep() / nxsched_msleep() / nxsched_ticksleep()
Strengths:
a. Does not depend on the signal framework.
b. Tick-based, without additional computational overhead.

Currently, the Nuttx driver framework extensively uses nxsig_* interfaces. However, the driver does not need to rely on signals or timespec conversion.
Therefore, a new set of APIs is added to reduce dependencies on other modules.

(This PR also aims to make signals optional, further reducing the code size of Nuttx.)

Signed-off-by: chao an <anchao.archer@bytedance.com>
2025-10-17 14:05:02 +08:00
..
ads7843e.c
ads7843e.h
ajoystick.c
aw86225.c
aw86225_internal.h
aw86225_reg.h
button_lower.c
button_upper.c
CMakeLists.txt
cypress_mbr3108.c
djoystick.c
ff_dummy.c
ff_upper.c
ft5x06.c
ft5x06.h
goldfish_events.c
gt9xx.c
Kconfig
keyboard_upper.c
Make.defs
max11802.c
max11802.h
mouse_upper.c
mxt.c
mxt.h
nunchuck.c
sbutton.c
spq10kbd.c
stmpe811.h
stmpe811_adc.c
stmpe811_base.c
stmpe811_gpio.c
stmpe811_temp.c
stmpe811_tsc.c
touchscreen_upper.c
tsc2007.c
tsc2007.h
uinput.c