1 menu "Clock Source drivers"
2 depends on GENERIC_CLOCKEVENTS
28 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
34 bool "BCM2835 timer driver" if COMPILE_TEST
37 Enables the support for the BCM2835 timer driver.
40 bool "BCM mobile timer driver" if COMPILE_TEST
43 Enables the support for the BCM Kona mobile timer driver.
45 config DIGICOLOR_TIMER
46 bool "Digicolor timer driver" if COMPILE_TEST
50 Enables the support for the digicolor timer driver.
53 bool "DW APB timer driver" if COMPILE_TEST
55 Enables the support for the dw_apb timer.
57 config DW_APB_TIMER_OF
63 bool "Faraday Technology timer driver" if COMPILE_TEST
69 Enables support for the Faraday Technology timer block
73 bool "Rockchip timer driver" if COMPILE_TEST
74 depends on ARM || ARM64
78 Enables the support for the rockchip timer driver.
80 config ARMADA_370_XP_TIMER
81 bool "Armada 370 and XP timer driver" if COMPILE_TEST
86 Enables the support for the Armada 370 and XP timer driver.
89 bool "Meson6 timer driver" if COMPILE_TEST
92 Enables the support for the Meson6 timer driver.
95 bool "Orion timer driver" if COMPILE_TEST
100 Enables the support for the Orion timer driver
103 bool "Owl timer driver" if COMPILE_TEST
106 Enables the support for the Actions Semi Owl timer driver.
109 bool "RDA timer driver" if COMPILE_TEST
110 depends on GENERIC_CLOCKEVENTS
114 Enables the support for the RDA Micro timer driver.
117 bool "Sun4i timer driver" if COMPILE_TEST
122 Enables support for the Sun4i timer.
125 bool "Sun5i timer driver" if COMPILE_TEST
127 depends on COMMON_CLK
129 Enables support the Sun5i timer.
132 bool "Tegra timer driver" if COMPILE_TEST
135 depends on ARM || ARM64
137 Enables support for the Tegra driver.
140 bool "VT8500 timer driver" if COMPILE_TEST
143 Enables support for the VT8500 driver.
146 bool "NPCM7xx timer driver" if COMPILE_TEST
150 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
151 While TIMER0 serves as clockevent and TIMER1 serves as clocksource.
153 config CADENCE_TTC_TIMER
154 bool "Cadence TTC timer driver" if COMPILE_TEST
155 depends on COMMON_CLK
157 Enables support for the cadence ttc driver.
160 bool "ASM9260 timer driver" if COMPILE_TEST
164 Enables support for the ASM9260 timer.
166 config CLKSRC_NOMADIK_MTU
167 bool "Nomakdik clocksource driver" if COMPILE_TEST
171 Support for Multi Timer Unit. MTU provides access
172 to multiple interrupt generating programmable
173 32-bit free running decrementing counters.
175 config CLKSRC_DBX500_PRCMU
176 bool "Clocksource PRCMU Timer" if COMPILE_TEST
179 Use the always on PRCMU Timer as clocksource
181 config CLPS711X_TIMER
182 bool "Cirrus logic timer driver" if COMPILE_TEST
185 Enables support for the Cirrus Logic PS711 timer.
188 bool "Atlas7 timer driver" if COMPILE_TEST
191 Enables support for the Atlas7 timer.
194 bool "Mxs timer driver" if COMPILE_TEST
198 Enables support for the Mxs timer.
201 bool "Prima2 timer driver" if COMPILE_TEST
204 Enables support for the Prima2 timer.
207 bool "U300 timer driver" if COMPILE_TEST
211 Enables support for the U300 timer.
214 bool "NSpire timer driver" if COMPILE_TEST
217 Enables support for the Nspire timer.
219 config KEYSTONE_TIMER
220 bool "Keystone timer driver" if COMPILE_TEST
221 depends on ARM || ARM64
224 Enables support for the Keystone timer.
226 config INTEGRATOR_AP_TIMER
227 bool "Integrator-ap timer driver" if COMPILE_TEST
230 Enables support for the Integrator-ap timer.
233 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
234 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
238 Support to use the timers of EFM32 SoCs as clock source and clock
241 config CLKSRC_LPC32XX
242 bool "Clocksource for LPC32XX" if COMPILE_TEST
248 Support for the LPC32XX clocksource.
250 config CLKSRC_PISTACHIO
251 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
255 Enables the clocksource for the Pistachio SoC.
258 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
259 depends on GENERIC_SCHED_CLOCK
260 select TIMER_OF if OF
262 This option enables support for Texas Instruments 32.768 Hz clocksource
263 available on many OMAP-like platforms.
266 bool "NPS400 clocksource driver" if COMPILE_TEST
267 depends on !PHYS_ADDR_T_64BIT
269 select TIMER_OF if OF
271 NPS400 clocksource support.
272 Got 64 bit counter with update rate up to 1000MHz.
273 This counter is accessed via couple of 32 bit memory mapped registers.
276 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
277 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
282 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
283 depends on GENERIC_SCHED_CLOCK
288 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
289 depends on GENERIC_SCHED_CLOCK
292 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
293 (ARC700 as well as ARC HS38).
294 TIMER0 serves as clockevent while TIMER1 provides clocksource
296 config ARC_TIMERS_64BIT
297 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
298 depends on ARC_TIMERS
301 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
302 RTC is implemented inside the core, while GFRC sits outside the core in
303 ARConnect IP block. Driver automatically picks one of them for clocksource
306 config ARM_ARCH_TIMER
308 select TIMER_OF if OF
309 select TIMER_ACPI if ACPI
311 config ARM_ARCH_TIMER_EVTSTREAM
312 bool "Enable ARM architected timer event stream generation by default"
313 default y if ARM_ARCH_TIMER
314 depends on ARM_ARCH_TIMER
316 This option enables support by default for event stream generation
317 based on the ARM architected timer. It is used for waking up CPUs
318 executing the wfe instruction at a frequency represented as a
319 power-of-2 divisor of the clock rate. The behaviour can also be
320 overridden on the command line using the
321 clocksource.arm_arch_timer.evtstream parameter.
322 The main use of the event stream is wfe-based timeouts of userspace
323 locking implementations. It might also be useful for imposing timeout
324 on wfe to safeguard against any programming errors in case an expected
325 event is not generated.
326 This must be disabled for hardware validation purposes to detect any
327 hardware anomalies of missing events.
329 config ARM_ARCH_TIMER_OOL_WORKAROUND
332 config FSL_ERRATUM_A008585
333 bool "Workaround for Freescale/NXP Erratum A-008585"
335 depends on ARM_ARCH_TIMER && ARM64
336 select ARM_ARCH_TIMER_OOL_WORKAROUND
338 This option enables a workaround for Freescale/NXP Erratum
339 A-008585 ("ARM generic timer may contain an erroneous
340 value"). The workaround will only be active if the
341 fsl,erratum-a008585 property is found in the timer node.
343 config HISILICON_ERRATUM_161010101
344 bool "Workaround for Hisilicon Erratum 161010101"
346 select ARM_ARCH_TIMER_OOL_WORKAROUND
347 depends on ARM_ARCH_TIMER && ARM64
349 This option enables a workaround for Hisilicon Erratum
350 161010101. The workaround will be active if the hisilicon,erratum-161010101
351 property is found in the timer node.
353 config ARM64_ERRATUM_858921
354 bool "Workaround for Cortex-A73 erratum 858921"
356 select ARM_ARCH_TIMER_OOL_WORKAROUND
357 depends on ARM_ARCH_TIMER && ARM64
359 This option enables a workaround applicable to Cortex-A73
360 (all versions), whose counter may return incorrect values.
361 The workaround will be dynamically enabled when an affected
364 config SUN50I_ERRATUM_UNKNOWN1
365 bool "Workaround for Allwinner A64 erratum UNKNOWN1"
367 depends on ARM_ARCH_TIMER && ARM64 && ARCH_SUNXI
368 select ARM_ARCH_TIMER_OOL_WORKAROUND
370 This option enables a workaround for instability in the timer on
371 the Allwinner A64 SoC. The workaround will only be active if the
372 allwinner,erratum-unknown1 property is found in the timer node.
374 config ARM_GLOBAL_TIMER
375 bool "Support for the ARM global timer" if COMPILE_TEST
376 select TIMER_OF if OF
379 This options enables support for the ARM global timer unit
381 config ARM_TIMER_SP804
382 bool "Support for Dual Timer SP804 module"
383 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
385 select TIMER_OF if OF
387 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
389 depends on ARM_GLOBAL_TIMER
392 Use ARM global timer clock source as sched_clock
394 config ARMV7M_SYSTICK
395 bool "Support for the ARMv7M system time" if COMPILE_TEST
396 select TIMER_OF if OF
399 This options enables support for the ARMv7M system timer unit
402 select TIMER_OF if OF
403 def_bool SOC_AT91SAM9 || SOC_SAMA5
406 bool "Atmel ST timer support" if COMPILE_TEST
411 Support for the Atmel ST timer.
413 config CLKSRC_EXYNOS_MCT
414 bool "Exynos multi core timer driver" if COMPILE_TEST
415 depends on ARM || ARM64
417 Support for Multi Core Timer controller on Exynos SoCs.
419 config CLKSRC_SAMSUNG_PWM
420 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
423 This is a new clocksource driver for the PWM timer found in
424 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
425 for all devicetree enabled platforms. This driver will be
426 needed only on systems that do not have the Exynos MCT available.
429 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
433 Support for Freescale FlexTimer Module (FTM) timer.
439 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
441 config OXNAS_RPS_TIMER
442 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
446 This enables support for the Oxford Semiconductor OXNAS RPS timers.
448 config SYS_SUPPORTS_SH_CMT
452 bool "Mediatek timer driver" if COMPILE_TEST
457 Support for Mediatek timer driver.
460 bool "Spreadtrum timer driver" if EXPERT
462 depends on (ARCH_SPRD || COMPILE_TEST)
466 Enables support for the Spreadtrum timer driver.
468 config SYS_SUPPORTS_SH_MTU2
471 config SYS_SUPPORTS_SH_TMU
474 config SYS_SUPPORTS_EM_STI
477 config CLKSRC_JCORE_PIT
478 bool "J-Core PIT timer driver" if COMPILE_TEST
483 This enables build of clocksource and clockevent driver for
484 the integrated PIT in the J-Core synthesizable, open source SoC.
487 bool "Renesas CMT timer driver" if COMPILE_TEST
489 default SYS_SUPPORTS_SH_CMT
491 This enables build of a clocksource and clockevent driver for
492 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
493 variants on a wide range of Mobile and Automotive SoCs from Renesas.
496 bool "Renesas MTU2 timer driver" if COMPILE_TEST
498 default SYS_SUPPORTS_SH_MTU2
500 This enables build of a clockevent driver for the Multi-Function
501 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
502 This hardware comes with 16 bit-timer registers.
505 bool "Renesas OSTM timer driver" if COMPILE_TEST
508 Enables the support for the Renesas OSTM.
511 bool "Renesas TMU timer driver" if COMPILE_TEST
513 default SYS_SUPPORTS_SH_TMU
515 This enables build of a clocksource and clockevent driver for
516 the 32-bit Timer Unit (TMU) hardware available on a wide range
520 bool "Renesas STI timer driver" if COMPILE_TEST
522 default SYS_SUPPORTS_EM_STI
524 This enables build of a clocksource and clockevent driver for
525 the 48-bit System Timer (STI) hardware available on a SoCs
526 such as EMEV2 from former NEC Electronics.
529 bool "Qualcomm MSM timer" if COMPILE_TEST
533 This enables the clocksource and the per CPU clockevent driver for the
536 config CLKSRC_VERSATILE
537 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
538 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
540 default y if MFD_VEXPRESS_SYSREG
542 This option enables clock source based on free running
543 counter available in the "System Registers" block of
544 ARM Versatile, RealView and Versatile Express reference
547 config CLKSRC_MIPS_GIC
552 config CLKSRC_TANGO_XTAL
553 bool "Clocksource for Tango SoC" if COMPILE_TEST
558 This enables the clocksource for Tango SoC
561 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
565 This enables OST0 support available on PXA and SA-11x0
569 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
572 This enables the 8 bits timer for the H8300 platform.
575 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
578 This enables the 16 bits timer for the H8300 platform with the
582 bool "Clocksource for the H8300 platform" if COMPILE_TEST
585 This enables the clocksource for the H8300 platform with the
588 config CLKSRC_IMX_GPT
589 bool "Clocksource using i.MX GPT" if COMPILE_TEST
590 depends on (ARM || ARM64) && CLKDEV_LOOKUP
593 config CLKSRC_IMX_TPM
594 bool "Clocksource using i.MX TPM" if COMPILE_TEST
595 depends on ARM && CLKDEV_LOOKUP
598 Enable this option to use IMX Timer/PWM Module (TPM) timer as
602 bool "Low power clocksource found in the LPC" if COMPILE_TEST
603 select TIMER_OF if OF
607 Enable this option to use the Low Power controller timer
610 config ATCPIT100_TIMER
611 bool "ATCPIT100 timer driver"
612 depends on NDS32 || COMPILE_TEST
617 This option enables support for the Andestech ATCPIT100 timers.
620 bool "Timer for the RISC-V platform"
621 depends on GENERIC_SCHED_CLOCK && RISCV
626 This enables the per-hart timer built into all RISC-V systems, which
627 is accessed via both the SBI and the rdcycle instruction. This is
628 required for all RISC-V systems.
631 bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
635 Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP
637 csky,mptimer is not only used in SMP system, it also could be used
638 single core system. It's not a mmio reg and it use mtcr/mfcr instruction.
641 bool "Gx6605s SOC system timer driver" if COMPILE_TEST
646 This option enables support for gx6605s SOC's timer.
648 config MILBEAUT_TIMER
649 bool "Milbeaut timer driver" if COMPILE_TEST
655 Enables the support for Milbeaut timer driver.