drivers/timers/Kconfig - nuttx - Git at Google

 #
 # For a description of the syntax of this configuration file,
 # see the file kconfig-language.txt in the NuttX tools repository.
 #

 menu "Timer Driver Support"

 config ARCH_HAVE_PWM_PULSECOUNT
 	bool
 	default n

 config ARCH_HAVE_PWM_OVERWRITE
 	bool
 	default n

 config ARCH_HAVE_PWM_DEADTIME
 	bool
 	default n

 config ARCH_HAVE_PWM_MULTICHAN
 	bool
 	default n

 config PWM
 	bool "PWM Driver Support"
 	default n
 	---help---
 		This selection enables building of the "upper-half" PWM driver.
 		See include/nuttx/timers/pwm.h for further PWM driver information.

 if PWM

 config PWM_PULSECOUNT
 	bool "PWM Pulse Count Support"
 	default n
 	depends on ARCH_HAVE_PWM_PULSECOUNT
 	---help---
 		Some hardware will support generation of a fixed number of pulses.
 		This might be used, for example to support a stepper motor.  If the
 		hardware will support a fixed pulse count, then this configuration
 		should be set to enable the capability.

 config PWM_OVERWRITE
 	bool "PWM Overwrite Support"
 	default n
 	depends on ARCH_HAVE_PWM_OVERWRITE
 	---help---
 		Some hardware will support generation of a pin overwrite with 0 or
 		1 without the need to wait for an end of cycle. The overwrite is
 		controlled from an application level the same way duty cycle or
 		frequency is modified.

 config PWM_DEADTIME
 	bool "PWM Deadtime Support"
 	default n
 	depends on ARCH_HAVE_PWM_DEADTIME
 	---help---
 		Some hardware will support deadtime generators that automatically
 		insert output activation delay for complementary PWM outputs. This
 		is usefull for H-bridge motor control for example. The deadtime
 		values are set from application level via the same IOCTL that sets
 		up duty cycle and frequency.

 		For detailed description about deadtime functionality please refer
 		to architecture manuals and datasheets.

 config PWM_MULTICHAN
 	bool "PWM Multiple Output Channel Support"
 	default n
 	depends on ARCH_HAVE_PWM_MULTICHAN
 	depends on !PWM_PULSECOUNT
 	---help---
 		Enables support for multiple output channels per timer.

 if PWM_MULTICHAN

 config PWM_NCHANNELS
 	int "Number of Output Channels Per Timer"
 	default 1
 	range 1 16
 	---help---
 		Specifies the number of output channels per timer.  Each timer
 		may support fewer output channels than this value.

 endif # PWM_MULTICHAN
 endif # PWM

 config CAPTURE
 	bool "Capture Driver Support"
 	default n
 	---help---
 		This selection enables building of the "upper-half" Capture driver.
 		See include/nuttx/timers/capture.h for further Capture driver information.

 config TIMER
 	bool "Timer Support"
 	default n
 	---help---
 		This selection enables building of the "upper-half" timer
 		driver. See include/nuttx/timers/timer.h for further timer driver
 		information.

 if TIMER

 config TIMER_ARCH
 	bool "Timer Arch Implementation"
 	select ARCH_HAVE_TICKLESS
 	select ARCH_HAVE_TIMEKEEPING
 	select SCHED_TICKLESS_LIMIT_MAX_SLEEP if SCHED_TICKLESS
 	select SCHED_TICKLESS_TICK_ARGUMENT if SCHED_TICKLESS
 	---help---
 		Implement timer arch API on top of timer driver interface.

 endif # TIMER

 config ONESHOT
 	bool "Oneshot timer driver"
 	default n
 	---help---
 		This selection enables building of the "upper-half" oneshot timer
 		driver. See include/nuttx/timers/oneshot.h for further oneshot timer
 		driver information.

 if ONESHOT

 config ALARM_ARCH
 	bool "Alarm Arch Implementation"
 	select ARCH_HAVE_TICKLESS
 	select ARCH_HAVE_TIMEKEEPING
 	select SCHED_TICKLESS_ALARM if SCHED_TICKLESS
 	select SCHED_TICKLESS_LIMIT_MAX_SLEEP if SCHED_TICKLESS
 	select SCHED_TICKLESS_TICK_ARGUMENT if SCHED_TICKLESS
 	---help---
 		Implement alarm arch API on top of oneshot driver interface.

 endif # ONESHOT

 menuconfig RTC
 	bool "RTC Driver Support"
 	default n
 	---help---
 		This selection enables configuration of a real time clock (RTCdriver.
 		See include/nuttx/timers/rtc.h for further RTC driver information.
 		Most RTC drivers are MCU specific and may require other specific
 		settings.

 if RTC

 config RTC_DATETIME
 	bool "Date/Time RTC Support"
 	default n
 	---help---
 		There are two general types of RTC:  (1) A simple battery backed
 		counter that keeps the time when power is down, and (2) a full
 		date / time RTC the provides the date and time information, often in
 		BCD format.  If RTC_DATETIME is selected, it specifies this second kind
 		of RTC. In this case, the RTC is used to "seed" the normal NuttX timer
 		and the NuttX system timer provides for higher resolution time.

 if !RTC_DATETIME

 config RTC_HIRES
 	bool "Hi-Res RTC Support"
 	default n
 	---help---
 		If RTC_DATETIME not selected, then the simple, battery backed counter
 		is used.  There are two different implementations of such simple
 		counters based on the time resolution of the counter: The typical RTC
 		keeps time to resolution of 1 second, usually supporting a 32-bit
 		time_t value.  In this case, the RTC is used to "seed" the normal NuttX
 		timer and the NuttX timer provides for higherresoution time.

 		If RTC_HIRES is enabled in the NuttX configuration, then the RTC
 		provides higher resolution time and completely replaces the system
 		timer for purpose of date and time.

 config RTC_FREQUENCY
 	int "Hi-Res RTC frequency"
 	default 1
 	depends on RTC_HIRES
 	---help---
 		If RTC_HIRES is defined, then the frequency of the high resolution RTC
 		must be provided.  If RTC_HIRES is not defined, RTC_FREQUENCY is
 		assumed to be one Hz.

 config RTC_ADJTIME
 	bool "RTC Adjustment Support"
 	default N
 	depends on RTC_HIRES
 	---help---
 		Enable support for adjtime() to adjust RTC run rate. The following
 		interface must be provided by RTC driver:

 			int up_rtc_adjtime(long ppb);

 endif # !RTC_DATETIME

 config RTC_ALARM
 	bool "RTC Alarm Support"
 	default n
 	---help---
 		Enable if the RTC hardware supports setting of an alarm.  A callback
 		function will be executed when the alarm goes off.

 config RTC_NALARMS
 	int "Number of alarms"
 	default 1
 	depends on RTC_ALARM
 	---help---
 		Number of alarms supported by the hardware.

 config RTC_DRIVER
 	bool "RTC Driver Support"
 	default n
 	---help---
 		This selection enables building of the "upper-half" RTC
 		driver. See include/nuttx/timers/rtc.h for further RTC driver
 		information.

 if RTC_DRIVER

 config RTC_ARCH
 	bool "RTC Arch Implementation"
 	default n
 	---help---
 		Implement RTC arch API on top of RTC driver interface.

 config RTC_PERIODIC
 	bool "RTC Periodic Interrupts"
 	default n
 	---help---
 		Add interrupt controls for RTCs that support periodic interrupts.

 config RTC_IOCTL
 	bool "RTC IOCTLs"
 	default n
 	---help---
 		Support the RTC interface ioctl() method.  This allows you to add
 		architecture-specific RTC operations to the RTC interface

 endif # RTC_DRIVER

 config RTC_EXTERNAL
 	bool "External RTC Support"
 	default n
 	---help---
 		In modern MCUs, the RTC is usually implement as an internal
 		peripheral to the MCU.  An option is to use an external RTC
 		connected to the MCU typically via SPI or I2C.

 		If an external RTC is connect to the MCU through some bus, then the
 		RTC will not be available to the system until after the system
 		fully boots up and is able to access the bus.  In that case, this
 		setting must be included to suppress attempts to initialize the RTC
 		early in the boot sequence.

 config RTC_DSXXXX
 	bool "DS130x/DS323x RTC Driver"
 	default n
 	select I2C
 	select RTC_DATETIME
 	depends on RTC_EXTERNAL
 	---help---
 		Enables support for the Maxim Integrated DS3231 I2C RTC timer.

 if RTC_DSXXXX

 choice
 	prompt "Maxim Integrated RTC"
 	default RTC_DS3231

 config RTC_DS1302
 	bool "DS1302"
 	---help---
 		Enables support for the Maxim Integrated DS1302 serial RTC timer.

 config RTC_DS1307
 	bool "DS1307"
 	---help---
 		Enables support for the Maxim Integrated DS1307 I2C RTC timer.

 config RTC_DS3231
 	bool "DS3231"
 	---help---
 		Enables support for the Maxim Integrated DS3231 I2C RTC timer.

 config RTC_DS3232
 	bool "DS3232"
 	---help---
 		Enables support for the Maxim Integrated DS3232 I2C RTC timer.

 config RTC_DS3234
 	bool "DS3234"
 	depends on EXPERIMENTAL
 	---help---
 		Enables support for the Maxim Integrated DS3234 SPI RTC timer.

 		Not yet implemented.

 endchoice # Maxim Integrated RTC

 config DS3231_I2C_FREQUENCY
 	int "DS1307/DS323x I2C frequency"
 	default 400000
 	range 1 400000

 endif # RTC_DSXXXX

 config RTC_PCF85263
 	bool "PCF85263 RTC Driver"
 	default n
 	select I2C
 	select RTC_DATETIME
 	depends on RTC_EXTERNAL
 	---help---
 		Enables support for the NXP PCF85263 I2C RTC timer.

 if RTC_PCF85263

 config PCF85263_I2C_FREQUENCY
 	int "PCF85263 I2C frequency"
 	default 400000
 	range 1 400000

 endif # RTC_PCF85263

 config RTC_PL031
 	bool "PL031 RTC Support"
 	default n

 config RTC_MCP794XX
 	bool "MCP794XX RTC Driver"
 	default n
 	select I2C
 	select RTC_DATETIME
 	depends on RTC_EXTERNAL
 	---help---
 		Enables support for the Microchip MCP794XX I2C RTC timer.

 if RTC_MCP794XX

 config MCP794XX_DATETIME_UTC
 	bool "Store datetime in UTC"
 	default n
 	---help---
 		If set, the datetime is stored in UTC timezone instead of timezone
 		defined by local time.

 config MCP794XX_I2C_FREQUENCY
 	int "MCP794XX I2C frequency"
 	default 400000
 	range 1 400000

 endif # RTC_MCP794XX

 config RTC_RX8010SJ
 	bool "RX8010SJ RTC Driver"
 	default n
 	select I2C
 	select RTC_DATETIME
 	depends on RTC_EXTERNAL
 	---help---
 		Enables support for the EPSON RX-8010SJ I2C RTC timer.

 if RTC_RX8010SJ

 config RX8010SJ_I2C_FREQUENCY
 	int "RX8010SJ I2C frequency"
 	default 400000
 	range 1 400000

 endif # RTC_RX8010SJ

 config RTC_RPMSG
 	bool "RPMSG RTC Driver"
 	default n
 	depends on RPMSG
 	select ARCH_HAVE_RTC_SUBSECONDS

 config RTC_RPMSG_SERVER
 	bool "The RTC RPMSG Role"
 	depends on RPMSG

 config RTC_RPMSG_SERVER_NAME
 	string "The name of RTC RPMSG Server"
 	depends on RTC_RPMSG
 	---help---
 		The proc name of RTC server. Client requests time from
 		specified name of remote proc.

 endif # RTC

 menuconfig WATCHDOG
 	bool "Watchdog Timer Support"
 	default n
 	---help---
 		This selection enables building of the "upper-half" watchdog timer
 		driver. See include/nuttx/timers/watchdog.h for further watchdog timer driver
 		information.

 if WATCHDOG

 config WATCHDOG_DEVPATH
 	string "Watchdog Device Path"
 	default "/dev/watchdog0"
 	---help---
 		Please, check how your specific chip or board uses this symbol.
 		FYI: It's NOT used by the Auto-monitor feature.

 config WATCHDOG_MAGIC_V
 	bool "Watchdog Device Magic num"
 	default y
 	---help---
 		The watchdog can be stopped by writing 'V' to the watchdog's device node

 config WATCHDOG_PANIC_NOTIFIER
 	bool "Enable watchdog panic notifier"
 	default n
 	---help---
 		When system PANIC, wdog_notifier() will be callled to disable the watchdog,
 		this is an useful option for debug if you want to keep crash scene.

 menuconfig WATCHDOG_AUTOMONITOR
 	bool "Auto-monitor"
 	---help---
 		The auto-monitor provides an OS-internal mechanism for automatically
 		start and repeatedly reset the WDTs that were previous selected.
 		Once the Auto-monitor is enabled, it will reset all
 		registered watchdog timers. If you start a specific WDT, the auto-monitor
 		will stop for that WDT and the application should take care of this from
 		now on.

 if WATCHDOG_AUTOMONITOR

 choice
 	prompt "Auto-monitor keepalive by"
 	default WATCHDOG_AUTOMONITOR_BY_WDOG

 config WATCHDOG_AUTOMONITOR_BY_CAPTURE
 	bool "Capture callback"
 	---help---
 		Feed watchdog through watchdog_ops_s::capture callback periodically

 config WATCHDOG_AUTOMONITOR_BY_ONESHOT
 	bool "Oneshot callback"
 	depends on ONESHOT
 	---help---
 		Feed watchdog through oneshot_lowerhalf_s functions periodically

 config WATCHDOG_AUTOMONITOR_BY_TIMER
 	bool "Timer callback"
 	depends on TIMER
 	---help---
 		Feed watchdog through timer_lowerhalf_s functions periodically

 config WATCHDOG_AUTOMONITOR_BY_WDOG
 	bool "Wdog callback"
 	---help---
 		Feed watchdog through wdog functions periodically

 config WATCHDOG_AUTOMONITOR_BY_WORKER
 	bool "Worker callback"
 	depends on SCHED_WORKQUEUE
 	---help---
 		Feed watchdog through wqueue functions periodically

 config WATCHDOG_AUTOMONITOR_BY_IDLE
 	bool "Idle callback"
 	depends on PM
 	---help---
 		Feed watchdog before idle through pm_callback_s::notify callback

 endchoice

 config WATCHDOG_AUTOMONITOR_TIMEOUT
 	int "Auto-monitor reset timeout(second)"
 	default 60

 if !WATCHDOG_AUTOMONITOR_BY_CAPTURE && !WATCHDOG_AUTOMONITOR_BY_IDLE

 config WATCHDOG_AUTOMONITOR_PING_INTERVAL
 	int "Auto-monitor keep a live interval"
 	range 0 WATCHDOG_AUTOMONITOR_TIMEOUT
 	default 0
 	---help---
 		If the interval is 0, it will change to (WATCHDOG_AUTOMONITOR_TIMEOUT / 2).
 		This interval will only be used by auto-monitor in oneshot, timer, wdog or
 		worker case.

 endif # !WATCHDOG_AUTOMONITOR_BY_CAPTURE && !WATCHDOG_AUTOMONITOR_BY_IDLE

 endif # WATCHDOG_AUTOMONITOR

 endif # WATCHDOG

 config TIMERS_CS2100CP
 	bool "CS2100-CP Fraction-N Clock Multiplier"
 	depends on I2C

 if TIMERS_CS2100CP

 config CS2100CP_DEBUG
 	bool "Enable CS2100-CP Debug Features"
 	depends on DEBUG_FEATURES

 config CS2100CP_REGDEBUG
 	bool "Enable CS2100-CP Register Debug"
 	depends on DEBUG_FEATURES

 endif # TIMERS_CS2100CP
 endmenu # Timer Driver Support
	#
	# For a description of the syntax of this configuration file,
	# see the file kconfig-language.txt in the NuttX tools repository.
	#

	menu "Timer Driver Support"

	config ARCH_HAVE_PWM_PULSECOUNT
	bool
	default n

	config ARCH_HAVE_PWM_OVERWRITE
	bool
	default n

	config ARCH_HAVE_PWM_DEADTIME
	bool
	default n

	config ARCH_HAVE_PWM_MULTICHAN
	bool
	default n

	config PWM
	bool "PWM Driver Support"
	default n
	---help---
	This selection enables building of the "upper-half" PWM driver.
	See include/nuttx/timers/pwm.h for further PWM driver information.

	if PWM

	config PWM_PULSECOUNT
	bool "PWM Pulse Count Support"
	default n
	depends on ARCH_HAVE_PWM_PULSECOUNT
	---help---
	Some hardware will support generation of a fixed number of pulses.
	This might be used, for example to support a stepper motor. If the
	hardware will support a fixed pulse count, then this configuration
	should be set to enable the capability.

	config PWM_OVERWRITE
	bool "PWM Overwrite Support"
	default n
	depends on ARCH_HAVE_PWM_OVERWRITE
	---help---
	Some hardware will support generation of a pin overwrite with 0 or
	1 without the need to wait for an end of cycle. The overwrite is
	controlled from an application level the same way duty cycle or
	frequency is modified.

	config PWM_DEADTIME
	bool "PWM Deadtime Support"
	default n
	depends on ARCH_HAVE_PWM_DEADTIME
	---help---
	Some hardware will support deadtime generators that automatically
	insert output activation delay for complementary PWM outputs. This
	is usefull for H-bridge motor control for example. The deadtime
	values are set from application level via the same IOCTL that sets
	up duty cycle and frequency.

	For detailed description about deadtime functionality please refer
	to architecture manuals and datasheets.

	config PWM_MULTICHAN
	bool "PWM Multiple Output Channel Support"
	default n
	depends on ARCH_HAVE_PWM_MULTICHAN
	depends on !PWM_PULSECOUNT
	---help---
	Enables support for multiple output channels per timer.

	if PWM_MULTICHAN

	config PWM_NCHANNELS
	int "Number of Output Channels Per Timer"
	default 1
	range 1 16
	---help---
	Specifies the number of output channels per timer. Each timer
	may support fewer output channels than this value.

	endif # PWM_MULTICHAN
	endif # PWM

	config CAPTURE
	bool "Capture Driver Support"
	default n
	---help---
	This selection enables building of the "upper-half" Capture driver.
	See include/nuttx/timers/capture.h for further Capture driver information.

	config TIMER
	bool "Timer Support"
	default n
	---help---
	This selection enables building of the "upper-half" timer
	driver. See include/nuttx/timers/timer.h for further timer driver
	information.

	if TIMER

	config TIMER_ARCH
	bool "Timer Arch Implementation"
	select ARCH_HAVE_TICKLESS
	select ARCH_HAVE_TIMEKEEPING
	select SCHED_TICKLESS_LIMIT_MAX_SLEEP if SCHED_TICKLESS
	select SCHED_TICKLESS_TICK_ARGUMENT if SCHED_TICKLESS
	---help---
	Implement timer arch API on top of timer driver interface.

	endif # TIMER

	config ONESHOT
	bool "Oneshot timer driver"
	default n
	---help---
	This selection enables building of the "upper-half" oneshot timer
	driver. See include/nuttx/timers/oneshot.h for further oneshot timer
	driver information.

	if ONESHOT

	config ALARM_ARCH
	bool "Alarm Arch Implementation"
	select ARCH_HAVE_TICKLESS
	select ARCH_HAVE_TIMEKEEPING
	select SCHED_TICKLESS_ALARM if SCHED_TICKLESS
	select SCHED_TICKLESS_LIMIT_MAX_SLEEP if SCHED_TICKLESS
	select SCHED_TICKLESS_TICK_ARGUMENT if SCHED_TICKLESS
	---help---
	Implement alarm arch API on top of oneshot driver interface.

	endif # ONESHOT

	menuconfig RTC
	bool "RTC Driver Support"
	default n
	---help---
	This selection enables configuration of a real time clock (RTCdriver.
	See include/nuttx/timers/rtc.h for further RTC driver information.
	Most RTC drivers are MCU specific and may require other specific
	settings.

	if RTC

	config RTC_DATETIME
	bool "Date/Time RTC Support"
	default n
	---help---
	There are two general types of RTC: (1) A simple battery backed
	counter that keeps the time when power is down, and (2) a full
	date / time RTC the provides the date and time information, often in
	BCD format. If RTC_DATETIME is selected, it specifies this second kind
	of RTC. In this case, the RTC is used to "seed" the normal NuttX timer
	and the NuttX system timer provides for higher resolution time.

	if !RTC_DATETIME

	config RTC_HIRES
	bool "Hi-Res RTC Support"
	default n
	---help---
	If RTC_DATETIME not selected, then the simple, battery backed counter
	is used. There are two different implementations of such simple
	counters based on the time resolution of the counter: The typical RTC
	keeps time to resolution of 1 second, usually supporting a 32-bit
	time_t value. In this case, the RTC is used to "seed" the normal NuttX
	timer and the NuttX timer provides for higherresoution time.

	If RTC_HIRES is enabled in the NuttX configuration, then the RTC
	provides higher resolution time and completely replaces the system
	timer for purpose of date and time.

	config RTC_FREQUENCY
	int "Hi-Res RTC frequency"
	default 1
	depends on RTC_HIRES
	---help---
	If RTC_HIRES is defined, then the frequency of the high resolution RTC
	must be provided. If RTC_HIRES is not defined, RTC_FREQUENCY is
	assumed to be one Hz.

	config RTC_ADJTIME
	bool "RTC Adjustment Support"
	default N
	depends on RTC_HIRES
	---help---
	Enable support for adjtime() to adjust RTC run rate. The following
	interface must be provided by RTC driver:

	int up_rtc_adjtime(long ppb);

	endif # !RTC_DATETIME

	config RTC_ALARM
	bool "RTC Alarm Support"
	default n
	---help---
	Enable if the RTC hardware supports setting of an alarm. A callback
	function will be executed when the alarm goes off.

	config RTC_NALARMS
	int "Number of alarms"
	default 1
	depends on RTC_ALARM
	---help---
	Number of alarms supported by the hardware.

	config RTC_DRIVER
	bool "RTC Driver Support"
	default n
	---help---
	This selection enables building of the "upper-half" RTC
	driver. See include/nuttx/timers/rtc.h for further RTC driver
	information.

	if RTC_DRIVER

	config RTC_ARCH
	bool "RTC Arch Implementation"
	default n
	---help---
	Implement RTC arch API on top of RTC driver interface.

	config RTC_PERIODIC
	bool "RTC Periodic Interrupts"
	default n
	---help---
	Add interrupt controls for RTCs that support periodic interrupts.

	config RTC_IOCTL
	bool "RTC IOCTLs"
	default n
	---help---
	Support the RTC interface ioctl() method. This allows you to add
	architecture-specific RTC operations to the RTC interface

	endif # RTC_DRIVER

	config RTC_EXTERNAL
	bool "External RTC Support"
	default n
	---help---
	In modern MCUs, the RTC is usually implement as an internal
	peripheral to the MCU. An option is to use an external RTC
	connected to the MCU typically via SPI or I2C.

	If an external RTC is connect to the MCU through some bus, then the
	RTC will not be available to the system until after the system
	fully boots up and is able to access the bus. In that case, this
	setting must be included to suppress attempts to initialize the RTC
	early in the boot sequence.

	config RTC_DSXXXX
	bool "DS130x/DS323x RTC Driver"
	default n
	select I2C
	select RTC_DATETIME
	depends on RTC_EXTERNAL
	---help---
	Enables support for the Maxim Integrated DS3231 I2C RTC timer.

	if RTC_DSXXXX

	choice
	prompt "Maxim Integrated RTC"
	default RTC_DS3231

	config RTC_DS1302
	bool "DS1302"
	---help---
	Enables support for the Maxim Integrated DS1302 serial RTC timer.

	config RTC_DS1307
	bool "DS1307"
	---help---
	Enables support for the Maxim Integrated DS1307 I2C RTC timer.

	config RTC_DS3231
	bool "DS3231"
	---help---
	Enables support for the Maxim Integrated DS3231 I2C RTC timer.

	config RTC_DS3232
	bool "DS3232"
	---help---
	Enables support for the Maxim Integrated DS3232 I2C RTC timer.

	config RTC_DS3234
	bool "DS3234"
	depends on EXPERIMENTAL
	---help---
	Enables support for the Maxim Integrated DS3234 SPI RTC timer.

	Not yet implemented.

	endchoice # Maxim Integrated RTC

	config DS3231_I2C_FREQUENCY
	int "DS1307/DS323x I2C frequency"
	default 400000
	range 1 400000

	endif # RTC_DSXXXX

	config RTC_PCF85263
	bool "PCF85263 RTC Driver"
	default n
	select I2C
	select RTC_DATETIME
	depends on RTC_EXTERNAL
	---help---
	Enables support for the NXP PCF85263 I2C RTC timer.

	if RTC_PCF85263

	config PCF85263_I2C_FREQUENCY
	int "PCF85263 I2C frequency"
	default 400000
	range 1 400000

	endif # RTC_PCF85263

	config RTC_PL031
	bool "PL031 RTC Support"
	default n

	config RTC_MCP794XX
	bool "MCP794XX RTC Driver"
	default n
	select I2C
	select RTC_DATETIME
	depends on RTC_EXTERNAL
	---help---
	Enables support for the Microchip MCP794XX I2C RTC timer.

	if RTC_MCP794XX

	config MCP794XX_DATETIME_UTC
	bool "Store datetime in UTC"
	default n
	---help---
	If set, the datetime is stored in UTC timezone instead of timezone
	defined by local time.

	config MCP794XX_I2C_FREQUENCY
	int "MCP794XX I2C frequency"
	default 400000
	range 1 400000

	endif # RTC_MCP794XX

	config RTC_RX8010SJ
	bool "RX8010SJ RTC Driver"
	default n
	select I2C
	select RTC_DATETIME
	depends on RTC_EXTERNAL
	---help---
	Enables support for the EPSON RX-8010SJ I2C RTC timer.

	if RTC_RX8010SJ

	config RX8010SJ_I2C_FREQUENCY
	int "RX8010SJ I2C frequency"
	default 400000
	range 1 400000

	endif # RTC_RX8010SJ

	config RTC_RPMSG
	bool "RPMSG RTC Driver"
	default n
	depends on RPMSG
	select ARCH_HAVE_RTC_SUBSECONDS

	config RTC_RPMSG_SERVER
	bool "The RTC RPMSG Role"
	depends on RPMSG

	config RTC_RPMSG_SERVER_NAME
	string "The name of RTC RPMSG Server"
	depends on RTC_RPMSG
	---help---
	The proc name of RTC server. Client requests time from
	specified name of remote proc.

	endif # RTC

	menuconfig WATCHDOG
	bool "Watchdog Timer Support"
	default n
	---help---
	This selection enables building of the "upper-half" watchdog timer
	driver. See include/nuttx/timers/watchdog.h for further watchdog timer driver
	information.

	if WATCHDOG

	config WATCHDOG_DEVPATH
	string "Watchdog Device Path"
	default "/dev/watchdog0"
	---help---
	Please, check how your specific chip or board uses this symbol.
	FYI: It's NOT used by the Auto-monitor feature.

	config WATCHDOG_MAGIC_V
	bool "Watchdog Device Magic num"
	default y
	---help---
	The watchdog can be stopped by writing 'V' to the watchdog's device node

	config WATCHDOG_PANIC_NOTIFIER
	bool "Enable watchdog panic notifier"
	default n
	---help---
	When system PANIC, wdog_notifier() will be callled to disable the watchdog,
	this is an useful option for debug if you want to keep crash scene.

	menuconfig WATCHDOG_AUTOMONITOR
	bool "Auto-monitor"
	---help---
	The auto-monitor provides an OS-internal mechanism for automatically
	start and repeatedly reset the WDTs that were previous selected.
	Once the Auto-monitor is enabled, it will reset all
	registered watchdog timers. If you start a specific WDT, the auto-monitor
	will stop for that WDT and the application should take care of this from
	now on.

	if WATCHDOG_AUTOMONITOR

	choice
	prompt "Auto-monitor keepalive by"
	default WATCHDOG_AUTOMONITOR_BY_WDOG

	config WATCHDOG_AUTOMONITOR_BY_CAPTURE
	bool "Capture callback"
	---help---
	Feed watchdog through watchdog_ops_s::capture callback periodically

	config WATCHDOG_AUTOMONITOR_BY_ONESHOT
	bool "Oneshot callback"
	depends on ONESHOT
	---help---
	Feed watchdog through oneshot_lowerhalf_s functions periodically

	config WATCHDOG_AUTOMONITOR_BY_TIMER
	bool "Timer callback"
	depends on TIMER
	---help---
	Feed watchdog through timer_lowerhalf_s functions periodically

	config WATCHDOG_AUTOMONITOR_BY_WDOG
	bool "Wdog callback"
	---help---
	Feed watchdog through wdog functions periodically

	config WATCHDOG_AUTOMONITOR_BY_WORKER
	bool "Worker callback"
	depends on SCHED_WORKQUEUE
	---help---
	Feed watchdog through wqueue functions periodically

	config WATCHDOG_AUTOMONITOR_BY_IDLE
	bool "Idle callback"
	depends on PM
	---help---
	Feed watchdog before idle through pm_callback_s::notify callback

	endchoice

	config WATCHDOG_AUTOMONITOR_TIMEOUT
	int "Auto-monitor reset timeout(second)"
	default 60

	if !WATCHDOG_AUTOMONITOR_BY_CAPTURE && !WATCHDOG_AUTOMONITOR_BY_IDLE

	config WATCHDOG_AUTOMONITOR_PING_INTERVAL
	int "Auto-monitor keep a live interval"
	range 0 WATCHDOG_AUTOMONITOR_TIMEOUT
	default 0
	---help---
	If the interval is 0, it will change to (WATCHDOG_AUTOMONITOR_TIMEOUT / 2).
	This interval will only be used by auto-monitor in oneshot, timer, wdog or
	worker case.

	endif # !WATCHDOG_AUTOMONITOR_BY_CAPTURE && !WATCHDOG_AUTOMONITOR_BY_IDLE

	endif # WATCHDOG_AUTOMONITOR

	endif # WATCHDOG

	config TIMERS_CS2100CP
	bool "CS2100-CP Fraction-N Clock Multiplier"
	depends on I2C

	if TIMERS_CS2100CP

	config CS2100CP_DEBUG
	bool "Enable CS2100-CP Debug Features"
	depends on DEBUG_FEATURES

	config CS2100CP_REGDEBUG
	bool "Enable CS2100-CP Register Debug"
	depends on DEBUG_FEATURES

	endif # TIMERS_CS2100CP
	endmenu # Timer Driver Support