drivers/timer/Kconfig

# Kconfig - timer driver configuration options

#
# Copyright (c) 2014-2015 Wind River Systems, Inc.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1) Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2) Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3) Neither the name of Wind River Systems nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#


menu "Timer Drivers"

config HPET_TIMER
	bool "HPET timer"
	default n
	depends on IOAPIC && X86_32
	help
	This option selects High Precision Event Timer (HPET) as a
	system timer.

config HPET_TIMER_LEGACY_EMULATION
	bool "HPET timer legacy emulation mode"
	default n
	depends on HPET_TIMER
	help
	This option switches HPET to legacy emulation mode.
	In this mode 8254 PIT is disabled, HPET timer0 is connected
	to IOAPIC IRQ2, timer1 -- to IOAPIC IRQ8.

config HPET_TIMER_DEBUG
	bool "Enable HPET debug output"
	default n
	depends on HPET_TIMER && PRINTK
	help
	This option enables HPET debugging output.

config HPET_TIMER_BASE_ADDRESS
	hex "HPET Base Address"
	default 0xFED00000
	depends on HPET_TIMER
	help
	This options specifies the base address of the HPET timer device.

config HPET_TIMER_IRQ
	int "HPET Timer IRQ"
	default 20
	depends on HPET_TIMER
	help
	This option specifies the IRQ used by the HPET timer.

config HPET_TIMER_IRQ_PRIORITY
	int "HPET Timer IRQ Priority"
	default 4
	depends on HPET_TIMER
	help
	This option specifies the IRQ priority used by the HPET timer.

choice
depends on HPET_TIMER
prompt "HPET Interrupt Trigger Condition"
default HPET_TIMER_FALLING_EDGE

config HPET_TIMER_FALLING_EDGE
	bool "Falling Edge"
	help
	This option signifies that the HPET timer uses falling edge interrupts.

config HPET_TIMER_RISING_EDGE
	bool "Rising Edge"
	help
	This option signifies that the HPET timer uses rising edge interrupts.

config HPET_TIMER_LEVEL_HIGH
	bool "Level High"
	help
	This option signifies that the HPET timer uses level high interrupts.

config HPET_TIMER_LEVEL_LOW
	bool "Level Low"
	help
	This option signifies that the HPET timer uses level low interrupts.

endchoice

config LOAPIC_TIMER
	bool "LOAPIC timer"
	depends on LOAPIC && X86_32
	default n
	help
	This option selects LOAPIC timer as a system timer.

config LOAPIC_TIMER_IRQ
	int "Local APIC Timer IRQ"
	default 24
	depends on LOAPIC_TIMER
	help
	This option specifies the IRQ used by the LOAPIC timer.

config LOAPIC_TIMER_IRQ_PRIORITY
	int "Local APIC Timer IRQ Priority"
	default 2
	depends on LOAPIC_TIMER
	help
	This options specifies the IRQ priority used by the LOAPIC timer.

config ARCV2_TIMER
	bool "ARC Timer"
	default y
	depends on ARC
	help
	This module implements a kernel device driver for the ARCv2 processor timer 0
	and provides the standard "system clock driver" interfaces.

config CORTEX_M_SYSTICK
	bool "Cortex-M SYSTICK timer"
	default y
	depends on CPU_CORTEX_M
	help
	This module implements a kernel device driver for the Cortex-M processor
	SYSTICK timer and provides the standard "system clock driver" interfaces.

endmenu