1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "Clock Source drivers"
3 depends on GENERIC_CLOCKEVENTS
30 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
36 bool "BCM2835 timer driver" if COMPILE_TEST
39 Enables the support for the BCM2835 timer driver.
42 bool "BCM mobile timer driver" if COMPILE_TEST
45 Enables the support for the BCM Kona mobile timer driver.
48 bool "Texas Instruments DaVinci timer driver" if COMPILE_TEST
50 Enables the support for the TI DaVinci timer driver.
52 config DIGICOLOR_TIMER
53 bool "Digicolor timer driver" if COMPILE_TEST
57 Enables the support for the digicolor timer driver.
60 bool "DW APB timer driver" if COMPILE_TEST
62 Enables the support for the dw_apb timer.
64 config DW_APB_TIMER_OF
70 bool "Faraday Technology timer driver" if COMPILE_TEST
76 Enables support for the Faraday Technology timer block
80 bool "Intel XScale IXP4xx timer driver" if COMPILE_TEST
85 Enables support for the Intel XScale IXP4xx SoC timer.
88 bool "Rockchip timer driver" if COMPILE_TEST
89 depends on ARM || ARM64
93 Enables the support for the Rockchip timer driver.
95 config ARMADA_370_XP_TIMER
96 bool "Armada 370 and XP timer driver" if COMPILE_TEST
101 Enables the support for the Armada 370 and XP timer driver.
104 bool "Meson6 timer driver" if COMPILE_TEST
107 Enables the support for the Meson6 timer driver.
110 bool "Orion timer driver" if COMPILE_TEST
115 Enables the support for the Orion timer driver
118 bool "Owl timer driver" if COMPILE_TEST
121 Enables the support for the Actions Semi Owl timer driver.
124 bool "RDA timer driver" if COMPILE_TEST
128 Enables the support for the RDA Micro timer driver.
131 bool "Sun4i timer driver" if COMPILE_TEST
136 Enables support for the Sun4i timer.
139 bool "Sun5i timer driver" if COMPILE_TEST
141 depends on COMMON_CLK
143 Enables support the Sun5i timer.
146 bool "Tegra timer driver" if COMPILE_TEST
149 depends on ARCH_TEGRA || COMPILE_TEST
151 Enables support for the Tegra driver.
154 bool "VT8500 timer driver" if COMPILE_TEST
157 Enables support for the VT8500 driver.
160 bool "NPCM7xx timer driver" if COMPILE_TEST
165 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
166 where TIMER0 serves as clockevent and TIMER1 serves as clocksource.
168 config CADENCE_TTC_TIMER
169 bool "Cadence TTC timer driver" if COMPILE_TEST
170 depends on COMMON_CLK
172 Enables support for the Cadence TTC driver.
175 bool "ASM9260 timer driver" if COMPILE_TEST
179 Enables support for the ASM9260 timer.
181 config CLKSRC_NOMADIK_MTU
182 bool "Nomakdik clocksource driver" if COMPILE_TEST
186 Support for Multi Timer Unit. MTU provides access
187 to multiple interrupt generating programmable
188 32-bit free running decrementing counters.
190 config CLKSRC_DBX500_PRCMU
191 bool "Clocksource PRCMU Timer" if COMPILE_TEST
194 Use the always on PRCMU Timer as clocksource.
196 config CLPS711X_TIMER
197 bool "Cirrus Logic timer driver" if COMPILE_TEST
200 Enables support for the Cirrus Logic PS711 timer.
203 bool "MXS timer driver" if COMPILE_TEST
207 Enables support for the MXS timer.
210 bool "NSpire timer driver" if COMPILE_TEST
213 Enables support for the Nspire timer.
215 config KEYSTONE_TIMER
216 bool "Keystone timer driver" if COMPILE_TEST
217 depends on ARM || ARM64
220 Enables support for the Keystone timer.
222 config INTEGRATOR_AP_TIMER
223 bool "Integrator-AP timer driver" if COMPILE_TEST
226 Enables support for the Integrator-AP timer.
228 config CLKSRC_LPC32XX
229 bool "Clocksource for LPC32XX" if COMPILE_TEST
235 Support for the LPC32XX clocksource.
237 config CLKSRC_PISTACHIO
238 bool "Clocksource for Pistachio SoC"
240 depends on MIPS || COMPILE_TEST
243 Enables the clocksource for the Pistachio SoC.
246 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
247 depends on GENERIC_SCHED_CLOCK
248 select TIMER_OF if OF
250 This option enables support for Texas Instruments 32.768 Hz clocksource
251 available on many OMAP-like platforms.
254 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
255 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
259 config CLKSRC_STM32_LP
260 bool "Low power clocksource for STM32 SoCs"
261 depends on MFD_STM32_LPTIMER || COMPILE_TEST
264 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
265 depends on GENERIC_SCHED_CLOCK
270 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
271 depends on GENERIC_SCHED_CLOCK
274 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
275 (ARC700 as well as ARC HS38).
276 TIMER0 serves as clockevent while TIMER1 provides clocksource.
278 config ARC_TIMERS_64BIT
279 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
280 depends on ARC_TIMERS
283 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP).
284 RTC is implemented inside the core, while GFRC sits outside the core in
285 ARConnect IP block. Driver automatically picks one of them for clocksource
288 config ARM_ARCH_TIMER
290 select TIMER_OF if OF
291 select TIMER_ACPI if ACPI
293 config ARM_ARCH_TIMER_EVTSTREAM
294 bool "Enable ARM architected timer event stream generation by default"
295 default y if ARM_ARCH_TIMER
296 depends on ARM_ARCH_TIMER
298 This option enables support by default for event stream generation
299 based on the ARM architected timer. It is used for waking up CPUs
300 executing the wfe instruction at a frequency represented as a
301 power-of-2 divisor of the clock rate. The behaviour can also be
302 overridden on the command line using the
303 clocksource.arm_arch_timer.evtstream parameter.
304 The main use of the event stream is wfe-based timeouts of userspace
305 locking implementations. It might also be useful for imposing timeout
306 on wfe to safeguard against any programming errors in case an expected
307 event is not generated.
308 This must be disabled for hardware validation purposes to detect any
309 hardware anomalies of missing events.
311 config ARM_ARCH_TIMER_OOL_WORKAROUND
314 config FSL_ERRATUM_A008585
315 bool "Workaround for Freescale/NXP Erratum A-008585"
317 depends on ARM_ARCH_TIMER && ARM64
318 select ARM_ARCH_TIMER_OOL_WORKAROUND
320 This option enables a workaround for Freescale/NXP Erratum
321 A-008585 ("ARM generic timer may contain an erroneous
322 value"). The workaround will only be active if the
323 fsl,erratum-a008585 property is found in the timer node.
325 config HISILICON_ERRATUM_161010101
326 bool "Workaround for Hisilicon Erratum 161010101"
328 select ARM_ARCH_TIMER_OOL_WORKAROUND
329 depends on ARM_ARCH_TIMER && ARM64
331 This option enables a workaround for Hisilicon Erratum
332 161010101. The workaround will be active if the hisilicon,erratum-161010101
333 property is found in the timer node.
335 config ARM64_ERRATUM_858921
336 bool "Workaround for Cortex-A73 erratum 858921"
338 select ARM_ARCH_TIMER_OOL_WORKAROUND
339 depends on ARM_ARCH_TIMER && ARM64
341 This option enables a workaround applicable to Cortex-A73
342 (all versions), whose counter may return incorrect values.
343 The workaround will be dynamically enabled when an affected
346 config SUN50I_ERRATUM_UNKNOWN1
347 bool "Workaround for Allwinner A64 erratum UNKNOWN1"
349 depends on ARM_ARCH_TIMER && ARM64 && ARCH_SUNXI
350 select ARM_ARCH_TIMER_OOL_WORKAROUND
352 This option enables a workaround for instability in the timer on
353 the Allwinner A64 SoC. The workaround will only be active if the
354 allwinner,erratum-unknown1 property is found in the timer node.
356 config ARM_GLOBAL_TIMER
357 bool "Support for the ARM global timer" if COMPILE_TEST
358 select TIMER_OF if OF
361 This option enables support for the ARM global timer unit.
363 config ARM_GT_INITIAL_PRESCALER_VAL
364 int "ARM global timer initial prescaler value"
365 default 2 if ARCH_ZYNQ
367 depends on ARM_GLOBAL_TIMER
369 When the ARM global timer initializes, its current rate is declared
370 to the kernel and maintained forever. Should it's parent clock
371 change, the driver tries to fix the timer's internal prescaler.
372 On some machs (i.e. Zynq) the initial prescaler value thus poses
373 bounds about how much the parent clock is allowed to decrease or
374 increase wrt the initial clock value.
375 This affects CPU_FREQ max delta from the initial frequency.
377 config ARM_TIMER_SP804
378 bool "Support for Dual Timer SP804 module" if COMPILE_TEST
379 depends on GENERIC_SCHED_CLOCK && HAVE_CLK
381 select TIMER_OF if OF
383 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
385 depends on ARM_GLOBAL_TIMER
388 Use ARM global timer clock source as sched_clock.
390 config ARMV7M_SYSTICK
391 bool "Support for the ARMv7M system time" if COMPILE_TEST
392 select TIMER_OF if OF
395 This option enables support for the ARMv7M system timer unit.
398 bool "Atmel PIT support" if COMPILE_TEST
400 select TIMER_OF if OF
402 Support for the Periodic Interval Timer found on Atmel SoCs.
405 bool "Atmel ST timer support" if COMPILE_TEST
410 Support for the Atmel ST timer.
412 config ATMEL_TCB_CLKSRC
413 bool "Atmel TC Block timer driver" if COMPILE_TEST
414 depends on ARM && HAS_IOMEM
415 select TIMER_OF if OF
417 Support for Timer Counter Blocks on Atmel SoCs.
419 config CLKSRC_EXYNOS_MCT
420 bool "Exynos multi core timer driver" if COMPILE_TEST
421 depends on ARM || ARM64
423 Support for Multi Core Timer controller on Exynos SoCs.
425 config CLKSRC_SAMSUNG_PWM
426 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
429 This is a new clocksource driver for the PWM timer found in
430 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
431 for all devicetree enabled platforms. This driver will be
432 needed only on systems that do not have the Exynos MCT available.
435 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
439 Support for Freescale FlexTimer Module (FTM) timer.
445 Support for Periodic Interrupt Timer on Freescale Vybrid Family SoCs.
447 config OXNAS_RPS_TIMER
448 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
452 This enables support for the Oxford Semiconductor OXNAS RPS timers.
454 config SYS_SUPPORTS_SH_CMT
458 bool "Mediatek timer driver" if COMPILE_TEST
463 Support for Mediatek timer driver.
466 bool "Spreadtrum timer driver" if EXPERT
468 depends on (ARCH_SPRD || COMPILE_TEST)
472 Enables support for the Spreadtrum timer driver.
474 config SYS_SUPPORTS_SH_MTU2
477 config SYS_SUPPORTS_SH_TMU
480 config SYS_SUPPORTS_EM_STI
483 config CLKSRC_JCORE_PIT
484 bool "J-Core PIT timer driver" if COMPILE_TEST
489 This enables build of clocksource and clockevent driver for
490 the integrated PIT in the J-Core synthesizable, open source SoC.
493 bool "Renesas CMT timer driver" if COMPILE_TEST
495 default SYS_SUPPORTS_SH_CMT
497 This enables build of a clocksource and clockevent driver for
498 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
499 variants on a wide range of Mobile and Automotive SoCs from Renesas.
502 bool "Renesas MTU2 timer driver" if COMPILE_TEST
504 default SYS_SUPPORTS_SH_MTU2
506 This enables build of a clockevent driver for the Multi-Function
507 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
508 This hardware comes with 16-bit timer registers.
511 bool "Renesas OSTM timer driver" if COMPILE_TEST
515 Enables the support for the Renesas OSTM.
518 bool "Renesas TMU timer driver" if COMPILE_TEST
520 default SYS_SUPPORTS_SH_TMU
522 This enables build of a clocksource and clockevent driver for
523 the 32-bit Timer Unit (TMU) hardware available on a wide range
527 bool "Renesas STI timer driver" if COMPILE_TEST
529 default SYS_SUPPORTS_EM_STI
531 This enables build of a clocksource and clockevent driver for
532 the 48-bit System Timer (STI) hardware available on a SoCs
533 such as EMEV2 from former NEC Electronics.
536 bool "Qualcomm MSM timer" if COMPILE_TEST
540 This enables the clocksource and the per CPU clockevent driver for the
543 config CLKSRC_VERSATILE
544 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
545 depends on GENERIC_SCHED_CLOCK
547 default y if (ARCH_VEXPRESS || ARCH_VERSATILE) && ARM
549 This option enables clock source based on free running
550 counter available in the "System Registers" block of
551 ARM Versatile and Versatile Express reference platforms.
553 config CLKSRC_MIPS_GIC
556 select CLOCKSOURCE_WATCHDOG
560 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
564 This enables OST0 support available on PXA and SA-11x0
568 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
571 This enables the 8 bits timer for the H8300 platform.
574 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
577 This enables the 16 bits timer for the H8300 platform with the
581 bool "Clocksource for the H8300 platform" if COMPILE_TEST
584 This enables the clocksource for the H8300 platform with the
587 config CLKSRC_IMX_GPT
588 bool "Clocksource using i.MX GPT" if COMPILE_TEST
589 depends on (ARM || ARM64) && HAVE_CLK
592 config CLKSRC_IMX_TPM
593 bool "Clocksource using i.MX TPM" if COMPILE_TEST
594 depends on (ARM || ARM64) && HAVE_CLK
598 Enable this option to use IMX Timer/PWM Module (TPM) timer as
601 config TIMER_IMX_SYS_CTR
602 bool "i.MX system counter timer" if COMPILE_TEST
605 Enable this option to use i.MX system counter timer as a
609 bool "Low power clocksource found in the LPC" if COMPILE_TEST
610 select TIMER_OF if OF
614 Enable this option to use the Low Power controller timer
617 config ATCPIT100_TIMER
618 bool "ATCPIT100 timer driver"
619 depends on NDS32 || COMPILE_TEST
624 This option enables support for the Andestech ATCPIT100 timers.
627 bool "Timer for the RISC-V platform" if COMPILE_TEST
628 depends on GENERIC_SCHED_CLOCK && RISCV && RISCV_SBI
632 This enables the per-hart timer built into all RISC-V systems, which
633 is accessed via both the SBI and the rdcycle instruction. This is
634 required for all RISC-V systems.
637 bool "CLINT Timer for the RISC-V platform" if COMPILE_TEST
638 depends on GENERIC_SCHED_CLOCK && RISCV
642 This option enables the CLINT timer for RISC-V systems. The CLINT
643 driver is usually used for NoMMU RISC-V systems.
646 bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
650 Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP
652 csky,mptimer is not only used in SMP system, it also could be used in
653 single core system. It's not a mmio reg and it uses mtcr/mfcr instruction.
656 bool "Gx6605s SOC system timer driver" if COMPILE_TEST
661 This option enables support for gx6605s SOC's timer.
663 config MILBEAUT_TIMER
664 bool "Milbeaut timer driver" if COMPILE_TEST
670 Enables the support for Milbeaut timer driver.
673 bool "Clocksource/timer using the TCU in Ingenic JZ SoCs"
675 depends on MIPS || COMPILE_TEST
676 depends on COMMON_CLK
681 Support for the timer/counter unit of the Ingenic JZ SoCs.
683 config INGENIC_SYSOST
684 bool "Clocksource/timer using the SYSOST in Ingenic X SoCs"
685 depends on MIPS || COMPILE_TEST
686 depends on COMMON_CLK
691 Support for the SYSOST of the Ingenic X Series SoCs.
694 bool "Clocksource using the OST in Ingenic JZ SoCs"
695 depends on MIPS || COMPILE_TEST
696 depends on COMMON_CLK
699 Support for the Operating System Timer of the Ingenic JZ SoCs.
701 config MICROCHIP_PIT64B
702 bool "Microchip PIT64B support"
703 depends on OF || COMPILE_TEST
707 This option enables Microchip PIT64B timer for Atmel
708 based system. It supports the oneshot, the periodic
709 modes and high resolution. It is used as a clocksource