1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "Clock Source drivers"
3 depends on GENERIC_CLOCKEVENTS
29 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
35 bool "BCM2835 timer driver" if COMPILE_TEST
38 Enables the support for the BCM2835 timer driver.
41 bool "BCM mobile timer driver" if COMPILE_TEST
44 Enables the support for the BCM Kona mobile timer driver.
47 bool "Texas Instruments DaVinci timer driver" if COMPILE_TEST
49 Enables the support for the TI DaVinci timer driver.
51 config DIGICOLOR_TIMER
52 bool "Digicolor timer driver" if COMPILE_TEST
56 Enables the support for the digicolor timer driver.
59 bool "DW APB timer driver" if COMPILE_TEST
61 Enables the support for the dw_apb timer.
63 config DW_APB_TIMER_OF
69 bool "Faraday Technology timer driver" if COMPILE_TEST
75 Enables support for the Faraday Technology timer block
79 bool "Intel XScale IXP4xx timer driver" if COMPILE_TEST
83 Enables support for the Intel XScale IXP4xx SoC timer.
86 bool "Rockchip timer driver" if COMPILE_TEST
87 depends on ARM || ARM64
91 Enables the support for the Rockchip timer driver.
93 config ARMADA_370_XP_TIMER
94 bool "Armada 370 and XP timer driver" if COMPILE_TEST
99 Enables the support for the Armada 370 and XP timer driver.
102 bool "Meson6 timer driver" if COMPILE_TEST
105 Enables the support for the Meson6 timer driver.
108 bool "Orion timer driver" if COMPILE_TEST
113 Enables the support for the Orion timer driver
116 bool "Owl timer driver" if COMPILE_TEST
119 Enables the support for the Actions Semi Owl timer driver.
122 bool "RDA timer driver" if COMPILE_TEST
126 Enables the support for the RDA Micro timer driver.
129 bool "Sun4i timer driver" if COMPILE_TEST
134 Enables support for the Sun4i timer.
137 bool "Sun5i timer driver" if COMPILE_TEST
139 depends on COMMON_CLK
141 Enables support the Sun5i timer.
144 bool "Tegra timer driver" if COMPILE_TEST
147 depends on ARCH_TEGRA || COMPILE_TEST
149 Enables support for the Tegra driver.
152 bool "VT8500 timer driver" if COMPILE_TEST
155 Enables support for the VT8500 driver.
158 bool "NPCM7xx timer driver" if COMPILE_TEST
163 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
164 where TIMER0 serves as clockevent and TIMER1 serves as clocksource.
166 config CADENCE_TTC_TIMER
167 bool "Cadence TTC timer driver" if COMPILE_TEST
168 depends on COMMON_CLK
170 Enables support for the Cadence TTC driver.
173 bool "ASM9260 timer driver" if COMPILE_TEST
177 Enables support for the ASM9260 timer.
179 config CLKSRC_NOMADIK_MTU
180 bool "Nomakdik clocksource driver" if COMPILE_TEST
184 Support for Multi Timer Unit. MTU provides access
185 to multiple interrupt generating programmable
186 32-bit free running decrementing counters.
188 config CLKSRC_DBX500_PRCMU
189 bool "Clocksource PRCMU Timer" if COMPILE_TEST
192 Use the always on PRCMU Timer as clocksource.
194 config CLPS711X_TIMER
195 bool "Cirrus Logic timer driver" if COMPILE_TEST
198 Enables support for the Cirrus Logic PS711 timer.
201 bool "Atlas7 timer driver" if COMPILE_TEST
204 Enables support for the Atlas7 timer.
207 bool "MXS timer driver" if COMPILE_TEST
211 Enables support for the MXS timer.
214 bool "Prima2 timer driver" if COMPILE_TEST
217 Enables support for the Prima2 timer.
220 bool "U300 timer driver" if COMPILE_TEST
224 Enables support for the U300 timer.
227 bool "NSpire timer driver" if COMPILE_TEST
230 Enables support for the Nspire timer.
232 config KEYSTONE_TIMER
233 bool "Keystone timer driver" if COMPILE_TEST
234 depends on ARM || ARM64
237 Enables support for the Keystone timer.
239 config INTEGRATOR_AP_TIMER
240 bool "Integrator-AP timer driver" if COMPILE_TEST
243 Enables support for the Integrator-AP timer.
246 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
247 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
251 Support to use the timers of EFM32 SoCs as clock source and clock
254 config CLKSRC_LPC32XX
255 bool "Clocksource for LPC32XX" if COMPILE_TEST
261 Support for the LPC32XX clocksource.
263 config CLKSRC_PISTACHIO
264 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
268 Enables the clocksource for the Pistachio SoC.
271 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
272 depends on GENERIC_SCHED_CLOCK
273 select TIMER_OF if OF
275 This option enables support for Texas Instruments 32.768 Hz clocksource
276 available on many OMAP-like platforms.
279 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
280 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
284 config CLKSRC_STM32_LP
285 bool "Low power clocksource for STM32 SoCs"
286 depends on MFD_STM32_LPTIMER || COMPILE_TEST
289 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
290 depends on GENERIC_SCHED_CLOCK
295 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
296 depends on GENERIC_SCHED_CLOCK
299 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
300 (ARC700 as well as ARC HS38).
301 TIMER0 serves as clockevent while TIMER1 provides clocksource.
303 config ARC_TIMERS_64BIT
304 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
305 depends on ARC_TIMERS
308 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP).
309 RTC is implemented inside the core, while GFRC sits outside the core in
310 ARConnect IP block. Driver automatically picks one of them for clocksource
313 config ARM_ARCH_TIMER
315 select TIMER_OF if OF
316 select TIMER_ACPI if ACPI
318 config ARM_ARCH_TIMER_EVTSTREAM
319 bool "Enable ARM architected timer event stream generation by default"
320 default y if ARM_ARCH_TIMER
321 depends on ARM_ARCH_TIMER
323 This option enables support by default for event stream generation
324 based on the ARM architected timer. It is used for waking up CPUs
325 executing the wfe instruction at a frequency represented as a
326 power-of-2 divisor of the clock rate. The behaviour can also be
327 overridden on the command line using the
328 clocksource.arm_arch_timer.evtstream parameter.
329 The main use of the event stream is wfe-based timeouts of userspace
330 locking implementations. It might also be useful for imposing timeout
331 on wfe to safeguard against any programming errors in case an expected
332 event is not generated.
333 This must be disabled for hardware validation purposes to detect any
334 hardware anomalies of missing events.
336 config ARM_ARCH_TIMER_OOL_WORKAROUND
339 config FSL_ERRATUM_A008585
340 bool "Workaround for Freescale/NXP Erratum A-008585"
342 depends on ARM_ARCH_TIMER && ARM64
343 select ARM_ARCH_TIMER_OOL_WORKAROUND
345 This option enables a workaround for Freescale/NXP Erratum
346 A-008585 ("ARM generic timer may contain an erroneous
347 value"). The workaround will only be active if the
348 fsl,erratum-a008585 property is found in the timer node.
350 config HISILICON_ERRATUM_161010101
351 bool "Workaround for Hisilicon Erratum 161010101"
353 select ARM_ARCH_TIMER_OOL_WORKAROUND
354 depends on ARM_ARCH_TIMER && ARM64
356 This option enables a workaround for Hisilicon Erratum
357 161010101. The workaround will be active if the hisilicon,erratum-161010101
358 property is found in the timer node.
360 config ARM64_ERRATUM_858921
361 bool "Workaround for Cortex-A73 erratum 858921"
363 select ARM_ARCH_TIMER_OOL_WORKAROUND
364 depends on ARM_ARCH_TIMER && ARM64
366 This option enables a workaround applicable to Cortex-A73
367 (all versions), whose counter may return incorrect values.
368 The workaround will be dynamically enabled when an affected
371 config SUN50I_ERRATUM_UNKNOWN1
372 bool "Workaround for Allwinner A64 erratum UNKNOWN1"
374 depends on ARM_ARCH_TIMER && ARM64 && ARCH_SUNXI
375 select ARM_ARCH_TIMER_OOL_WORKAROUND
377 This option enables a workaround for instability in the timer on
378 the Allwinner A64 SoC. The workaround will only be active if the
379 allwinner,erratum-unknown1 property is found in the timer node.
381 config ARM_GLOBAL_TIMER
382 bool "Support for the ARM global timer" if COMPILE_TEST
383 select TIMER_OF if OF
386 This option enables support for the ARM global timer unit.
388 config ARM_TIMER_SP804
389 bool "Support for Dual Timer SP804 module" if COMPILE_TEST
390 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
392 select TIMER_OF if OF
394 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
396 depends on ARM_GLOBAL_TIMER
399 Use ARM global timer clock source as sched_clock.
401 config ARMV7M_SYSTICK
402 bool "Support for the ARMv7M system time" if COMPILE_TEST
403 select TIMER_OF if OF
406 This option enables support for the ARMv7M system timer unit.
409 bool "Atmel PIT support" if COMPILE_TEST
411 select TIMER_OF if OF
413 Support for the Periodic Interval Timer found on Atmel SoCs.
416 bool "Atmel ST timer support" if COMPILE_TEST
421 Support for the Atmel ST timer.
423 config ATMEL_TCB_CLKSRC
424 bool "Atmel TC Block timer driver" if COMPILE_TEST
425 depends on ARM && HAS_IOMEM
426 select TIMER_OF if OF
428 Support for Timer Counter Blocks on Atmel SoCs.
430 config CLKSRC_EXYNOS_MCT
431 bool "Exynos multi core timer driver" if COMPILE_TEST
432 depends on ARM || ARM64
434 Support for Multi Core Timer controller on Exynos SoCs.
436 config CLKSRC_SAMSUNG_PWM
437 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
440 This is a new clocksource driver for the PWM timer found in
441 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
442 for all devicetree enabled platforms. This driver will be
443 needed only on systems that do not have the Exynos MCT available.
446 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
450 Support for Freescale FlexTimer Module (FTM) timer.
456 Support for Periodic Interrupt Timer on Freescale Vybrid Family SoCs.
458 config OXNAS_RPS_TIMER
459 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
463 This enables support for the Oxford Semiconductor OXNAS RPS timers.
465 config SYS_SUPPORTS_SH_CMT
469 bool "Mediatek timer driver" if COMPILE_TEST
474 Support for Mediatek timer driver.
477 bool "Spreadtrum timer driver" if EXPERT
479 depends on (ARCH_SPRD || COMPILE_TEST)
483 Enables support for the Spreadtrum timer driver.
485 config SYS_SUPPORTS_SH_MTU2
488 config SYS_SUPPORTS_SH_TMU
491 config SYS_SUPPORTS_EM_STI
494 config CLKSRC_JCORE_PIT
495 bool "J-Core PIT timer driver" if COMPILE_TEST
500 This enables build of clocksource and clockevent driver for
501 the integrated PIT in the J-Core synthesizable, open source SoC.
504 bool "Renesas CMT timer driver" if COMPILE_TEST
506 default SYS_SUPPORTS_SH_CMT
508 This enables build of a clocksource and clockevent driver for
509 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
510 variants on a wide range of Mobile and Automotive SoCs from Renesas.
513 bool "Renesas MTU2 timer driver" if COMPILE_TEST
515 default SYS_SUPPORTS_SH_MTU2
517 This enables build of a clockevent driver for the Multi-Function
518 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
519 This hardware comes with 16-bit timer registers.
522 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
558 default y if (ARCH_VEXPRESS || ARCH_VERSATILE) && ARM
560 This option enables clock source based on free running
561 counter available in the "System Registers" block of
562 ARM Versatile and Versatile Express reference platforms.
564 config CLKSRC_MIPS_GIC
567 select CLOCKSOURCE_WATCHDOG
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 || ARM64) && CLKDEV_LOOKUP
617 Enable this option to use IMX Timer/PWM Module (TPM) timer as
620 config TIMER_IMX_SYS_CTR
621 bool "i.MX system counter timer" if COMPILE_TEST
624 Enable this option to use i.MX system counter timer as a
628 bool "Low power clocksource found in the LPC" if COMPILE_TEST
629 select TIMER_OF if OF
633 Enable this option to use the Low Power controller timer
636 config ATCPIT100_TIMER
637 bool "ATCPIT100 timer driver"
638 depends on NDS32 || COMPILE_TEST
643 This option enables support for the Andestech ATCPIT100 timers.
646 bool "Timer for the RISC-V platform" if COMPILE_TEST
647 depends on GENERIC_SCHED_CLOCK && RISCV && RISCV_SBI
651 This enables the per-hart timer built into all RISC-V systems, which
652 is accessed via both the SBI and the rdcycle instruction. This is
653 required for all RISC-V systems.
656 bool "CLINT Timer for the RISC-V platform" if COMPILE_TEST
657 depends on GENERIC_SCHED_CLOCK && RISCV
661 This option enables the CLINT timer for RISC-V systems. The CLINT
662 driver is usually used for NoMMU RISC-V systems.
665 bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
669 Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP
671 csky,mptimer is not only used in SMP system, it also could be used in
672 single core system. It's not a mmio reg and it uses mtcr/mfcr instruction.
675 bool "Gx6605s SOC system timer driver" if COMPILE_TEST
680 This option enables support for gx6605s SOC's timer.
682 config MILBEAUT_TIMER
683 bool "Milbeaut timer driver" if COMPILE_TEST
689 Enables the support for Milbeaut timer driver.
692 bool "Clocksource/timer using the TCU in Ingenic JZ SoCs"
694 depends on MIPS || COMPILE_TEST
695 depends on COMMON_CLK
700 Support for the timer/counter unit of the Ingenic JZ SoCs.
702 config INGENIC_SYSOST
703 bool "Clocksource/timer using the SYSOST in Ingenic X SoCs"
704 depends on MIPS || COMPILE_TEST
705 depends on COMMON_CLK
710 Support for the SYSOST of the Ingenic X Series SoCs.
713 bool "Clocksource using the OST in Ingenic JZ SoCs"
714 depends on MIPS || COMPILE_TEST
715 depends on COMMON_CLK
718 Support for the Operating System Timer of the Ingenic JZ SoCs.
720 config MICROCHIP_PIT64B
721 bool "Microchip PIT64B support"
722 depends on OF || COMPILE_TEST
726 This option enables Microchip PIT64B timer for Atmel
727 based system. It supports the oneshot, the periodic
728 modes and high resolution. It is used as a clocksource