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
84 Enables support for the Intel XScale IXP4xx SoC timer.
87 bool "Rockchip timer driver" if COMPILE_TEST
88 depends on ARM || ARM64
92 Enables the support for the Rockchip timer driver.
94 config ARMADA_370_XP_TIMER
95 bool "Armada 370 and XP timer driver" if COMPILE_TEST
100 Enables the support for the Armada 370 and XP timer driver.
103 bool "Meson6 timer driver" if COMPILE_TEST
106 Enables the support for the Meson6 timer driver.
109 bool "Orion timer driver" if COMPILE_TEST
114 Enables the support for the Orion timer driver
117 bool "Owl timer driver" if COMPILE_TEST
120 Enables the support for the Actions Semi Owl timer driver.
123 bool "RDA timer driver" if COMPILE_TEST
127 Enables the support for the RDA Micro timer driver.
130 bool "Sun4i timer driver" if COMPILE_TEST
135 Enables support for the Sun4i timer.
138 bool "Sun5i timer driver" if COMPILE_TEST
140 depends on COMMON_CLK
142 Enables support the Sun5i timer.
145 bool "Tegra timer driver" if COMPILE_TEST
148 depends on ARCH_TEGRA || COMPILE_TEST
150 Enables support for the Tegra driver.
153 bool "VT8500 timer driver" if COMPILE_TEST
156 Enables support for the VT8500 driver.
159 bool "NPCM7xx timer driver" if COMPILE_TEST
164 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
165 where TIMER0 serves as clockevent and TIMER1 serves as clocksource.
167 config CADENCE_TTC_TIMER
168 bool "Cadence TTC timer driver" if COMPILE_TEST
169 depends on COMMON_CLK
171 Enables support for the Cadence TTC driver.
174 bool "ASM9260 timer driver" if COMPILE_TEST
178 Enables support for the ASM9260 timer.
180 config CLKSRC_NOMADIK_MTU
181 bool "Nomakdik clocksource driver" if COMPILE_TEST
185 Support for Multi Timer Unit. MTU provides access
186 to multiple interrupt generating programmable
187 32-bit free running decrementing counters.
189 config CLKSRC_DBX500_PRCMU
190 bool "Clocksource PRCMU Timer" if COMPILE_TEST
193 Use the always on PRCMU Timer as clocksource.
195 config CLPS711X_TIMER
196 bool "Cirrus Logic timer driver" if COMPILE_TEST
199 Enables support for the Cirrus Logic PS711 timer.
202 bool "MXS timer driver" if COMPILE_TEST
206 Enables support for the MXS timer.
209 bool "NSpire timer driver" if COMPILE_TEST
212 Enables support for the Nspire timer.
214 config KEYSTONE_TIMER
215 bool "Keystone timer driver" if COMPILE_TEST
216 depends on ARM || ARM64
219 Enables support for the Keystone timer.
221 config INTEGRATOR_AP_TIMER
222 bool "Integrator-AP timer driver" if COMPILE_TEST
225 Enables support for the Integrator-AP timer.
227 config CLKSRC_LPC32XX
228 bool "Clocksource for LPC32XX" if COMPILE_TEST
234 Support for the LPC32XX clocksource.
236 config CLKSRC_PISTACHIO
237 bool "Clocksource for Pistachio SoC"
239 depends on MIPS || COMPILE_TEST
242 Enables the clocksource for the Pistachio SoC.
245 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
246 depends on GENERIC_SCHED_CLOCK
247 select TIMER_OF if OF
249 This option enables support for Texas Instruments 32.768 Hz clocksource
250 available on many OMAP-like platforms.
253 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
254 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
258 config CLKSRC_STM32_LP
259 bool "Low power clocksource for STM32 SoCs"
260 depends on MFD_STM32_LPTIMER || COMPILE_TEST
263 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
264 depends on GENERIC_SCHED_CLOCK
269 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
270 depends on GENERIC_SCHED_CLOCK
273 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
274 (ARC700 as well as ARC HS38).
275 TIMER0 serves as clockevent while TIMER1 provides clocksource.
277 config ARC_TIMERS_64BIT
278 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
279 depends on ARC_TIMERS
282 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP).
283 RTC is implemented inside the core, while GFRC sits outside the core in
284 ARConnect IP block. Driver automatically picks one of them for clocksource
287 config ARM_ARCH_TIMER
289 select TIMER_OF if OF
290 select TIMER_ACPI if ACPI
292 config ARM_ARCH_TIMER_EVTSTREAM
293 bool "Enable ARM architected timer event stream generation by default"
294 default y if ARM_ARCH_TIMER
295 depends on ARM_ARCH_TIMER
297 This option enables support by default for event stream generation
298 based on the ARM architected timer. It is used for waking up CPUs
299 executing the wfe instruction at a frequency represented as a
300 power-of-2 divisor of the clock rate. The behaviour can also be
301 overridden on the command line using the
302 clocksource.arm_arch_timer.evtstream parameter.
303 The main use of the event stream is wfe-based timeouts of userspace
304 locking implementations. It might also be useful for imposing timeout
305 on wfe to safeguard against any programming errors in case an expected
306 event is not generated.
307 This must be disabled for hardware validation purposes to detect any
308 hardware anomalies of missing events.
310 config ARM_ARCH_TIMER_OOL_WORKAROUND
313 config FSL_ERRATUM_A008585
314 bool "Workaround for Freescale/NXP Erratum A-008585"
316 depends on ARM_ARCH_TIMER && ARM64
317 select ARM_ARCH_TIMER_OOL_WORKAROUND
319 This option enables a workaround for Freescale/NXP Erratum
320 A-008585 ("ARM generic timer may contain an erroneous
321 value"). The workaround will only be active if the
322 fsl,erratum-a008585 property is found in the timer node.
324 config HISILICON_ERRATUM_161010101
325 bool "Workaround for Hisilicon Erratum 161010101"
327 select ARM_ARCH_TIMER_OOL_WORKAROUND
328 depends on ARM_ARCH_TIMER && ARM64
330 This option enables a workaround for Hisilicon Erratum
331 161010101. The workaround will be active if the hisilicon,erratum-161010101
332 property is found in the timer node.
334 config ARM64_ERRATUM_858921
335 bool "Workaround for Cortex-A73 erratum 858921"
337 select ARM_ARCH_TIMER_OOL_WORKAROUND
338 depends on ARM_ARCH_TIMER && ARM64
340 This option enables a workaround applicable to Cortex-A73
341 (all versions), whose counter may return incorrect values.
342 The workaround will be dynamically enabled when an affected
345 config SUN50I_ERRATUM_UNKNOWN1
346 bool "Workaround for Allwinner A64 erratum UNKNOWN1"
348 depends on ARM_ARCH_TIMER && ARM64 && ARCH_SUNXI
349 select ARM_ARCH_TIMER_OOL_WORKAROUND
351 This option enables a workaround for instability in the timer on
352 the Allwinner A64 SoC. The workaround will only be active if the
353 allwinner,erratum-unknown1 property is found in the timer node.
355 config ARM_GLOBAL_TIMER
356 bool "Support for the ARM global timer" if COMPILE_TEST
357 select TIMER_OF if OF
360 This option enables support for the ARM global timer unit.
362 config ARM_GT_INITIAL_PRESCALER_VAL
363 int "ARM global timer initial prescaler value"
364 default 2 if ARCH_ZYNQ
366 depends on ARM_GLOBAL_TIMER
368 When the ARM global timer initializes, its current rate is declared
369 to the kernel and maintained forever. Should it's parent clock
370 change, the driver tries to fix the timer's internal prescaler.
371 On some machs (i.e. Zynq) the initial prescaler value thus poses
372 bounds about how much the parent clock is allowed to decrease or
373 increase wrt the initial clock value.
374 This affects CPU_FREQ max delta from the initial frequency.
376 config ARM_TIMER_SP804
377 bool "Support for Dual Timer SP804 module" if COMPILE_TEST
378 depends on GENERIC_SCHED_CLOCK && HAVE_CLK
380 select TIMER_OF if OF
382 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
384 depends on ARM_GLOBAL_TIMER
387 Use ARM global timer clock source as sched_clock.
389 config ARMV7M_SYSTICK
390 bool "Support for the ARMv7M system time" if COMPILE_TEST
391 select TIMER_OF if OF
394 This option enables support for the ARMv7M system timer unit.
397 bool "Atmel PIT support" if COMPILE_TEST
399 select TIMER_OF if OF
401 Support for the Periodic Interval Timer found on Atmel SoCs.
404 bool "Atmel ST timer support" if COMPILE_TEST
409 Support for the Atmel ST timer.
411 config ATMEL_TCB_CLKSRC
412 bool "Atmel TC Block timer driver" if COMPILE_TEST
413 depends on ARM && HAS_IOMEM
414 select TIMER_OF if OF
416 Support for Timer Counter Blocks on Atmel SoCs.
418 config CLKSRC_EXYNOS_MCT
419 bool "Exynos multi core timer driver" if COMPILE_TEST
420 depends on ARM || ARM64
422 Support for Multi Core Timer controller on Exynos SoCs.
424 config CLKSRC_SAMSUNG_PWM
425 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
428 This is a new clocksource driver for the PWM timer found in
429 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
430 for all devicetree enabled platforms. This driver will be
431 needed only on systems that do not have the Exynos MCT available.
434 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
438 Support for Freescale FlexTimer Module (FTM) timer.
444 Support for Periodic Interrupt Timer on Freescale Vybrid Family SoCs.
446 config OXNAS_RPS_TIMER
447 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
451 This enables support for the Oxford Semiconductor OXNAS RPS timers.
453 config SYS_SUPPORTS_SH_CMT
457 bool "Mediatek timer driver" if COMPILE_TEST
462 Support for Mediatek timer driver.
465 bool "Spreadtrum timer driver" if EXPERT
467 depends on (ARCH_SPRD || COMPILE_TEST)
471 Enables support for the Spreadtrum timer driver.
473 config SYS_SUPPORTS_SH_MTU2
476 config SYS_SUPPORTS_SH_TMU
479 config SYS_SUPPORTS_EM_STI
482 config CLKSRC_JCORE_PIT
483 bool "J-Core PIT timer driver" if COMPILE_TEST
488 This enables build of clocksource and clockevent driver for
489 the integrated PIT in the J-Core synthesizable, open source SoC.
492 bool "Renesas CMT timer driver" if COMPILE_TEST
494 default SYS_SUPPORTS_SH_CMT
496 This enables build of a clocksource and clockevent driver for
497 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
498 variants on a wide range of Mobile and Automotive SoCs from Renesas.
501 bool "Renesas MTU2 timer driver" if COMPILE_TEST
503 default SYS_SUPPORTS_SH_MTU2
505 This enables build of a clockevent driver for the Multi-Function
506 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
507 This hardware comes with 16-bit timer registers.
510 bool "Renesas OSTM timer driver" if COMPILE_TEST
514 Enables the support for the Renesas OSTM.
517 bool "Renesas TMU timer driver" if COMPILE_TEST
519 default SYS_SUPPORTS_SH_TMU
521 This enables build of a clocksource and clockevent driver for
522 the 32-bit Timer Unit (TMU) hardware available on a wide range
526 bool "Renesas STI timer driver" if COMPILE_TEST
528 default SYS_SUPPORTS_EM_STI
530 This enables build of a clocksource and clockevent driver for
531 the 48-bit System Timer (STI) hardware available on a SoCs
532 such as EMEV2 from former NEC Electronics.
535 bool "Qualcomm MSM timer" if COMPILE_TEST
539 This enables the clocksource and the per CPU clockevent driver for the
542 config CLKSRC_VERSATILE
543 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
544 depends on GENERIC_SCHED_CLOCK
546 default y if (ARCH_VEXPRESS || ARCH_VERSATILE) && ARM
548 This option enables clock source based on free running
549 counter available in the "System Registers" block of
550 ARM Versatile and Versatile Express reference platforms.
552 config CLKSRC_MIPS_GIC
555 select CLOCKSOURCE_WATCHDOG
559 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
563 This enables OST0 support available on PXA and SA-11x0
567 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
570 This enables the 8 bits timer for the H8300 platform.
573 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
576 This enables the 16 bits timer for the H8300 platform with the
580 bool "Clocksource for the H8300 platform" if COMPILE_TEST
583 This enables the clocksource for the H8300 platform with the
586 config CLKSRC_IMX_GPT
587 bool "Clocksource using i.MX GPT" if COMPILE_TEST
588 depends on (ARM || ARM64) && HAVE_CLK
591 config CLKSRC_IMX_TPM
592 bool "Clocksource using i.MX TPM" if COMPILE_TEST
593 depends on (ARM || ARM64) && HAVE_CLK
597 Enable this option to use IMX Timer/PWM Module (TPM) timer as
600 config TIMER_IMX_SYS_CTR
601 bool "i.MX system counter timer" if COMPILE_TEST
604 Enable this option to use i.MX system counter timer as a
608 bool "Low power clocksource found in the LPC" if COMPILE_TEST
609 select TIMER_OF if OF
613 Enable this option to use the Low Power controller timer
616 config ATCPIT100_TIMER
617 bool "ATCPIT100 timer driver"
618 depends on NDS32 || COMPILE_TEST
623 This option enables support for the Andestech ATCPIT100 timers.
626 bool "Timer for the RISC-V platform" if COMPILE_TEST
627 depends on GENERIC_SCHED_CLOCK && RISCV && RISCV_SBI
631 This enables the per-hart timer built into all RISC-V systems, which
632 is accessed via both the SBI and the rdcycle instruction. This is
633 required for all RISC-V systems.
636 bool "CLINT Timer for the RISC-V platform" if COMPILE_TEST
637 depends on GENERIC_SCHED_CLOCK && RISCV
641 This option enables the CLINT timer for RISC-V systems. The CLINT
642 driver is usually used for NoMMU RISC-V systems.
645 bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
649 Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP
651 csky,mptimer is not only used in SMP system, it also could be used in
652 single core system. It's not a mmio reg and it uses mtcr/mfcr instruction.
655 bool "Gx6605s SOC system timer driver" if COMPILE_TEST
660 This option enables support for gx6605s SOC's timer.
662 config MILBEAUT_TIMER
663 bool "Milbeaut timer driver" if COMPILE_TEST
669 Enables the support for Milbeaut timer driver.
672 bool "Clocksource/timer using the TCU in Ingenic JZ SoCs"
674 depends on MIPS || COMPILE_TEST
675 depends on COMMON_CLK
680 Support for the timer/counter unit of the Ingenic JZ SoCs.
682 config INGENIC_SYSOST
683 bool "Clocksource/timer using the SYSOST in Ingenic X SoCs"
684 depends on MIPS || COMPILE_TEST
685 depends on COMMON_CLK
690 Support for the SYSOST of the Ingenic X Series SoCs.
693 bool "Clocksource using the OST in Ingenic JZ SoCs"
694 depends on MIPS || COMPILE_TEST
695 depends on COMMON_CLK
698 Support for the Operating System Timer of the Ingenic JZ SoCs.
700 config MICROCHIP_PIT64B
701 bool "Microchip PIT64B support"
702 depends on OF || COMPILE_TEST
706 This option enables Microchip PIT64B timer for Atmel
707 based system. It supports the oneshot, the periodic
708 modes and high resolution. It is used as a clocksource