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 "Intel XScale IXP4xx timer driver" if COMPILE_TEST
77 Enables support for the Intel XScale IXP4xx SoC timer.
80 bool "Rockchip timer driver" if COMPILE_TEST
81 depends on ARM || ARM64
85 Enables the support for the rockchip timer driver.
87 config ARMADA_370_XP_TIMER
88 bool "Armada 370 and XP timer driver" if COMPILE_TEST
93 Enables the support for the Armada 370 and XP timer driver.
96 bool "Meson6 timer driver" if COMPILE_TEST
99 Enables the support for the Meson6 timer driver.
102 bool "Orion timer driver" if COMPILE_TEST
107 Enables the support for the Orion timer driver
110 bool "Owl timer driver" if COMPILE_TEST
113 Enables the support for the Actions Semi Owl timer driver.
116 bool "RDA timer driver" if COMPILE_TEST
117 depends on GENERIC_CLOCKEVENTS
121 Enables the support for the RDA Micro timer driver.
124 bool "Sun4i timer driver" if COMPILE_TEST
129 Enables support for the Sun4i timer.
132 bool "Sun5i timer driver" if COMPILE_TEST
134 depends on COMMON_CLK
136 Enables support the Sun5i timer.
139 bool "Tegra timer driver" if COMPILE_TEST
142 depends on ARM || ARM64
144 Enables support for the Tegra driver.
147 bool "VT8500 timer driver" if COMPILE_TEST
150 Enables support for the VT8500 driver.
153 bool "NPCM7xx timer driver" if COMPILE_TEST
158 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
159 While TIMER0 serves as clockevent and TIMER1 serves as clocksource.
161 config CADENCE_TTC_TIMER
162 bool "Cadence TTC timer driver" if COMPILE_TEST
163 depends on COMMON_CLK
165 Enables support for the cadence ttc driver.
168 bool "ASM9260 timer driver" if COMPILE_TEST
172 Enables support for the ASM9260 timer.
174 config CLKSRC_NOMADIK_MTU
175 bool "Nomakdik clocksource driver" if COMPILE_TEST
179 Support for Multi Timer Unit. MTU provides access
180 to multiple interrupt generating programmable
181 32-bit free running decrementing counters.
183 config CLKSRC_DBX500_PRCMU
184 bool "Clocksource PRCMU Timer" if COMPILE_TEST
187 Use the always on PRCMU Timer as clocksource
189 config CLPS711X_TIMER
190 bool "Cirrus logic timer driver" if COMPILE_TEST
193 Enables support for the Cirrus Logic PS711 timer.
196 bool "Atlas7 timer driver" if COMPILE_TEST
199 Enables support for the Atlas7 timer.
202 bool "Mxs timer driver" if COMPILE_TEST
206 Enables support for the Mxs timer.
209 bool "Prima2 timer driver" if COMPILE_TEST
212 Enables support for the Prima2 timer.
215 bool "U300 timer driver" if COMPILE_TEST
219 Enables support for the U300 timer.
222 bool "NSpire timer driver" if COMPILE_TEST
225 Enables support for the Nspire timer.
227 config KEYSTONE_TIMER
228 bool "Keystone timer driver" if COMPILE_TEST
229 depends on ARM || ARM64
232 Enables support for the Keystone timer.
234 config INTEGRATOR_AP_TIMER
235 bool "Integrator-ap timer driver" if COMPILE_TEST
238 Enables support for the Integrator-ap timer.
241 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
242 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
246 Support to use the timers of EFM32 SoCs as clock source and clock
249 config CLKSRC_LPC32XX
250 bool "Clocksource for LPC32XX" if COMPILE_TEST
256 Support for the LPC32XX clocksource.
258 config CLKSRC_PISTACHIO
259 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
263 Enables the clocksource for the Pistachio SoC.
266 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
267 depends on GENERIC_SCHED_CLOCK
268 select TIMER_OF if OF
270 This option enables support for Texas Instruments 32.768 Hz clocksource
271 available on many OMAP-like platforms.
274 bool "NPS400 clocksource driver" if COMPILE_TEST
275 depends on !PHYS_ADDR_T_64BIT
277 select TIMER_OF if OF
279 NPS400 clocksource support.
280 Got 64 bit counter with update rate up to 1000MHz.
281 This counter is accessed via couple of 32 bit memory mapped registers.
284 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
285 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
290 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
291 depends on GENERIC_SCHED_CLOCK
296 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
297 depends on GENERIC_SCHED_CLOCK
300 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
301 (ARC700 as well as ARC HS38).
302 TIMER0 serves as clockevent while TIMER1 provides clocksource
304 config ARC_TIMERS_64BIT
305 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
306 depends on ARC_TIMERS
309 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
310 RTC is implemented inside the core, while GFRC sits outside the core in
311 ARConnect IP block. Driver automatically picks one of them for clocksource
314 config ARM_ARCH_TIMER
316 select TIMER_OF if OF
317 select TIMER_ACPI if ACPI
319 config ARM_ARCH_TIMER_EVTSTREAM
320 bool "Enable ARM architected timer event stream generation by default"
321 default y if ARM_ARCH_TIMER
322 depends on ARM_ARCH_TIMER
324 This option enables support by default for event stream generation
325 based on the ARM architected timer. It is used for waking up CPUs
326 executing the wfe instruction at a frequency represented as a
327 power-of-2 divisor of the clock rate. The behaviour can also be
328 overridden on the command line using the
329 clocksource.arm_arch_timer.evtstream parameter.
330 The main use of the event stream is wfe-based timeouts of userspace
331 locking implementations. It might also be useful for imposing timeout
332 on wfe to safeguard against any programming errors in case an expected
333 event is not generated.
334 This must be disabled for hardware validation purposes to detect any
335 hardware anomalies of missing events.
337 config ARM_ARCH_TIMER_OOL_WORKAROUND
340 config FSL_ERRATUM_A008585
341 bool "Workaround for Freescale/NXP Erratum A-008585"
343 depends on ARM_ARCH_TIMER && ARM64
344 select ARM_ARCH_TIMER_OOL_WORKAROUND
346 This option enables a workaround for Freescale/NXP Erratum
347 A-008585 ("ARM generic timer may contain an erroneous
348 value"). The workaround will only be active if the
349 fsl,erratum-a008585 property is found in the timer node.
351 config HISILICON_ERRATUM_161010101
352 bool "Workaround for Hisilicon Erratum 161010101"
354 select ARM_ARCH_TIMER_OOL_WORKAROUND
355 depends on ARM_ARCH_TIMER && ARM64
357 This option enables a workaround for Hisilicon Erratum
358 161010101. The workaround will be active if the hisilicon,erratum-161010101
359 property is found in the timer node.
361 config ARM64_ERRATUM_858921
362 bool "Workaround for Cortex-A73 erratum 858921"
364 select ARM_ARCH_TIMER_OOL_WORKAROUND
365 depends on ARM_ARCH_TIMER && ARM64
367 This option enables a workaround applicable to Cortex-A73
368 (all versions), whose counter may return incorrect values.
369 The workaround will be dynamically enabled when an affected
372 config SUN50I_ERRATUM_UNKNOWN1
373 bool "Workaround for Allwinner A64 erratum UNKNOWN1"
375 depends on ARM_ARCH_TIMER && ARM64 && ARCH_SUNXI
376 select ARM_ARCH_TIMER_OOL_WORKAROUND
378 This option enables a workaround for instability in the timer on
379 the Allwinner A64 SoC. The workaround will only be active if the
380 allwinner,erratum-unknown1 property is found in the timer node.
382 config ARM_GLOBAL_TIMER
383 bool "Support for the ARM global timer" if COMPILE_TEST
384 select TIMER_OF if OF
387 This options enables support for the ARM global timer unit
389 config ARM_TIMER_SP804
390 bool "Support for Dual Timer SP804 module" if COMPILE_TEST
391 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
393 select TIMER_OF if OF
395 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
397 depends on ARM_GLOBAL_TIMER
400 Use ARM global timer clock source as sched_clock
402 config ARMV7M_SYSTICK
403 bool "Support for the ARMv7M system time" if COMPILE_TEST
404 select TIMER_OF if OF
407 This options enables support for the ARMv7M system timer unit
410 bool "Atmel PIT support" if COMPILE_TEST
412 select TIMER_OF if OF
414 Support for the Periodic Interval Timer found on Atmel SoCs.
417 bool "Atmel ST timer support" if COMPILE_TEST
422 Support for the Atmel ST timer.
424 config ATMEL_TCB_CLKSRC
425 bool "Atmel TC Block timer driver" if COMPILE_TEST
427 select TIMER_OF if OF
429 Support for Timer Counter Blocks on Atmel SoCs.
431 config CLKSRC_EXYNOS_MCT
432 bool "Exynos multi core timer driver" if COMPILE_TEST
433 depends on ARM || ARM64
435 Support for Multi Core Timer controller on Exynos SoCs.
437 config CLKSRC_SAMSUNG_PWM
438 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
441 This is a new clocksource driver for the PWM timer found in
442 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
443 for all devicetree enabled platforms. This driver will be
444 needed only on systems that do not have the Exynos MCT available.
447 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
451 Support for Freescale FlexTimer Module (FTM) timer.
457 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
459 config OXNAS_RPS_TIMER
460 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
464 This enables support for the Oxford Semiconductor OXNAS RPS timers.
466 config SYS_SUPPORTS_SH_CMT
470 bool "Mediatek timer driver" if COMPILE_TEST
475 Support for Mediatek timer driver.
478 bool "Spreadtrum timer driver" if EXPERT
480 depends on (ARCH_SPRD || COMPILE_TEST)
484 Enables support for the Spreadtrum timer driver.
486 config SYS_SUPPORTS_SH_MTU2
489 config SYS_SUPPORTS_SH_TMU
492 config SYS_SUPPORTS_EM_STI
495 config CLKSRC_JCORE_PIT
496 bool "J-Core PIT timer driver" if COMPILE_TEST
501 This enables build of clocksource and clockevent driver for
502 the integrated PIT in the J-Core synthesizable, open source SoC.
505 bool "Renesas CMT timer driver" if COMPILE_TEST
507 default SYS_SUPPORTS_SH_CMT
509 This enables build of a clocksource and clockevent driver for
510 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
511 variants on a wide range of Mobile and Automotive SoCs from Renesas.
514 bool "Renesas MTU2 timer driver" if COMPILE_TEST
516 default SYS_SUPPORTS_SH_MTU2
518 This enables build of a clockevent driver for the Multi-Function
519 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
520 This hardware comes with 16 bit-timer registers.
523 bool "Renesas OSTM timer driver" if COMPILE_TEST
526 Enables the support for the Renesas OSTM.
529 bool "Renesas TMU timer driver" if COMPILE_TEST
531 default SYS_SUPPORTS_SH_TMU
533 This enables build of a clocksource and clockevent driver for
534 the 32-bit Timer Unit (TMU) hardware available on a wide range
538 bool "Renesas STI timer driver" if COMPILE_TEST
540 default SYS_SUPPORTS_EM_STI
542 This enables build of a clocksource and clockevent driver for
543 the 48-bit System Timer (STI) hardware available on a SoCs
544 such as EMEV2 from former NEC Electronics.
547 bool "Qualcomm MSM timer" if COMPILE_TEST
551 This enables the clocksource and the per CPU clockevent driver for the
554 config CLKSRC_VERSATILE
555 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
556 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
558 default y if MFD_VEXPRESS_SYSREG
560 This option enables clock source based on free running
561 counter available in the "System Registers" block of
562 ARM Versatile, RealView and Versatile Express reference
565 config CLKSRC_MIPS_GIC
570 config CLKSRC_TANGO_XTAL
571 bool "Clocksource for Tango SoC" if COMPILE_TEST
576 This enables the clocksource for Tango SoC
579 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
583 This enables OST0 support available on PXA and SA-11x0
587 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
590 This enables the 8 bits timer for the H8300 platform.
593 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
596 This enables the 16 bits timer for the H8300 platform with the
600 bool "Clocksource for the H8300 platform" if COMPILE_TEST
603 This enables the clocksource for the H8300 platform with the
606 config CLKSRC_IMX_GPT
607 bool "Clocksource using i.MX GPT" if COMPILE_TEST
608 depends on (ARM || ARM64) && CLKDEV_LOOKUP
611 config CLKSRC_IMX_TPM
612 bool "Clocksource using i.MX TPM" if COMPILE_TEST
613 depends on ARM && CLKDEV_LOOKUP
616 Enable this option to use IMX Timer/PWM Module (TPM) timer as
620 bool "Low power clocksource found in the LPC" if COMPILE_TEST
621 select TIMER_OF if OF
625 Enable this option to use the Low Power controller timer
628 config ATCPIT100_TIMER
629 bool "ATCPIT100 timer driver"
630 depends on NDS32 || COMPILE_TEST
635 This option enables support for the Andestech ATCPIT100 timers.
638 bool "Timer for the RISC-V platform"
639 depends on GENERIC_SCHED_CLOCK && RISCV
644 This enables the per-hart timer built into all RISC-V systems, which
645 is accessed via both the SBI and the rdcycle instruction. This is
646 required for all RISC-V systems.
649 bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
653 Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP
655 csky,mptimer is not only used in SMP system, it also could be used
656 single core system. It's not a mmio reg and it use mtcr/mfcr instruction.
659 bool "Gx6605s SOC system timer driver" if COMPILE_TEST
664 This option enables support for gx6605s SOC's timer.
666 config MILBEAUT_TIMER
667 bool "Milbeaut timer driver" if COMPILE_TEST
673 Enables the support for Milbeaut timer driver.