mirror of
https://github.com/torvalds/linux.git
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47137c6ba1
Pull timer updates from Thomas Gleixner:
"Nothing really exciting this time:
- a few fixlets in the NOHZ code
- a new ARM SoC timer abomination. One should expect that we have
enough of them already, but they insist on inventing new ones.
- the usual bunch of ARM SoC timer updates. That feels like herding
cats"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource: arm_arch_timer: Consolidate arch_timer_evtstrm_enable
clocksource: arm_arch_timer: Enable counter access for 32-bit ARM
clocksource: arm_arch_timer: Change clocksource name if CP15 unavailable
clocksource: sirf: Disable counter before re-setting it
clocksource: cadence_ttc: Add support for 32bit mode
clocksource: tcb_clksrc: Sanitize IRQ request
clocksource: arm_arch_timer: Discard unavailable timers correctly
clocksource: vf_pit_timer: Support shutdown mode
ARM: meson6: clocksource: Add Meson6 timer support
ARM: meson: documentation: Add timer documentation
clocksource: sh_tmu: Document r8a7779 binding
clocksource: sh_mtu2: Document r7s72100 binding
clocksource: sh_cmt: Document SoC specific bindings
timerfd: Remove an always true check
nohz: Avoid tick's double reprogramming in highres mode
nohz: Fix spurious periodic tick behaviour in low-res dynticks mode
227 lines
5.4 KiB
Plaintext
227 lines
5.4 KiB
Plaintext
menu "Clock Source drivers"
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config CLKSRC_OF
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bool
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config CLKSRC_I8253
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bool
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config CLKEVT_I8253
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bool
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config I8253_LOCK
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bool
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config CLKBLD_I8253
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def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
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config CLKSRC_MMIO
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bool
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config DW_APB_TIMER
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bool
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config DW_APB_TIMER_OF
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bool
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select DW_APB_TIMER
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select CLKSRC_OF
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config ARMADA_370_XP_TIMER
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bool
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select CLKSRC_OF
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config MESON6_TIMER
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bool
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config ORION_TIMER
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select CLKSRC_OF
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select CLKSRC_MMIO
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bool
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config SUN4I_TIMER
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select CLKSRC_MMIO
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bool
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config SUN5I_HSTIMER
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select CLKSRC_MMIO
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bool
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config VT8500_TIMER
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bool
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config CADENCE_TTC_TIMER
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bool
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config CLKSRC_NOMADIK_MTU
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bool
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depends on (ARCH_NOMADIK || ARCH_U8500)
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select CLKSRC_MMIO
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help
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Support for Multi Timer Unit. MTU provides access
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to multiple interrupt generating programmable
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32-bit free running decrementing counters.
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config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
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bool
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depends on CLKSRC_NOMADIK_MTU
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help
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Use the Multi Timer Unit as the sched_clock.
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config CLKSRC_DBX500_PRCMU
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bool "Clocksource PRCMU Timer"
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depends on UX500_SOC_DB8500
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default y
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help
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Use the always on PRCMU Timer as clocksource
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config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
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bool "Clocksource PRCMU Timer sched_clock"
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depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
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default y
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help
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Use the always on PRCMU Timer as sched_clock
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config CLKSRC_EFM32
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bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
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depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
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select CLKSRC_MMIO
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default ARCH_EFM32
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help
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Support to use the timers of EFM32 SoCs as clock source and clock
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event device.
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config ARM_ARCH_TIMER
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bool
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select CLKSRC_OF if OF
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config ARM_ARCH_TIMER_EVTSTREAM
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bool "Support for ARM architected timer event stream generation"
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default y if ARM_ARCH_TIMER
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depends on ARM_ARCH_TIMER
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help
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This option enables support for event stream generation based on
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the ARM architected timer. It is used for waking up CPUs executing
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the wfe instruction at a frequency represented as a power-of-2
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divisor of the clock rate.
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The main use of the event stream is wfe-based timeouts of userspace
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locking implementations. It might also be useful for imposing timeout
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on wfe to safeguard against any programming errors in case an expected
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event is not generated.
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This must be disabled for hardware validation purposes to detect any
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hardware anomalies of missing events.
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config ARM_GLOBAL_TIMER
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bool
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select CLKSRC_OF if OF
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help
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This options enables support for the ARM global timer unit
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config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
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bool
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depends on ARM_GLOBAL_TIMER
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default y
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help
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Use ARM global timer clock source as sched_clock
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config ATMEL_PIT
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select CLKSRC_OF if OF
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def_bool SOC_AT91SAM9 || SOC_SAMA5
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config CLKSRC_METAG_GENERIC
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def_bool y if METAG
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help
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This option enables support for the Meta per-thread timers.
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config CLKSRC_EXYNOS_MCT
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def_bool y if ARCH_EXYNOS
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depends on !ARM64
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help
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Support for Multi Core Timer controller on Exynos SoCs.
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config CLKSRC_SAMSUNG_PWM
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bool
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help
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This is a new clocksource driver for the PWM timer found in
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Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
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for all devicetree enabled platforms. This driver will be
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needed only on systems that do not have the Exynos MCT available.
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config FSL_FTM_TIMER
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bool
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help
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Support for Freescale FlexTimer Module (FTM) timer.
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config VF_PIT_TIMER
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bool
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help
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Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
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config SYS_SUPPORTS_SH_CMT
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bool
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config MTK_TIMER
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select CLKSRC_OF
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select CLKSRC_MMIO
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bool
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config SYS_SUPPORTS_SH_MTU2
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bool
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config SYS_SUPPORTS_SH_TMU
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bool
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config SYS_SUPPORTS_EM_STI
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bool
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config SH_TIMER_CMT
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bool "Renesas CMT timer driver" if COMPILE_TEST
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depends on GENERIC_CLOCKEVENTS
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default SYS_SUPPORTS_SH_CMT
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help
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This enables build of a clocksource and clockevent driver for
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the Compare Match Timer (CMT) hardware available in 16/32/48-bit
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variants on a wide range of Mobile and Automotive SoCs from Renesas.
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config SH_TIMER_MTU2
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bool "Renesas MTU2 timer driver" if COMPILE_TEST
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depends on GENERIC_CLOCKEVENTS
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default SYS_SUPPORTS_SH_MTU2
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help
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This enables build of a clockevent driver for the Multi-Function
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Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
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This hardware comes with 16 bit-timer registers.
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config SH_TIMER_TMU
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bool "Renesas TMU timer driver" if COMPILE_TEST
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depends on GENERIC_CLOCKEVENTS
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default SYS_SUPPORTS_SH_TMU
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help
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This enables build of a clocksource and clockevent driver for
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the 32-bit Timer Unit (TMU) hardware available on a wide range
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SoCs from Renesas.
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config EM_TIMER_STI
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bool "Renesas STI timer driver" if COMPILE_TEST
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depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
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default SYS_SUPPORTS_EM_STI
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help
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This enables build of a clocksource and clockevent driver for
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the 48-bit System Timer (STI) hardware available on a SoCs
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such as EMEV2 from former NEC Electronics.
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config CLKSRC_QCOM
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bool
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config CLKSRC_VERSATILE
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bool "ARM Versatile (Express) reference platforms clock source"
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depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
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select CLKSRC_OF
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default y if MFD_VEXPRESS_SYSREG
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help
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This option enables clock source based on free running
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counter available in the "System Registers" block of
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ARM Versatile, RealView and Versatile Express reference
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platforms.
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endmenu
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