1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "Clock Source drivers"
3 depends on GENERIC_CLOCKEVENTS
25 config OMAP_DM_SYSTIMER
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 "OMAP dual-mode timer driver" if ARCH_K3 || COMPILE_TEST
64 Enables the support for the TI dual-mode timer driver.
67 bool "DW APB timer driver" if COMPILE_TEST
69 Enables the support for the dw_apb timer.
71 config DW_APB_TIMER_OF
77 bool "Faraday Technology timer driver" if COMPILE_TEST
83 Enables support for the Faraday Technology timer block
87 bool "Intel XScale IXP4xx timer driver" if COMPILE_TEST
92 Enables support for the Intel XScale IXP4xx SoC timer.
95 bool "Rockchip timer driver" if COMPILE_TEST
96 depends on ARM || ARM64
100 Enables the support for the Rockchip timer driver.
102 config ARMADA_370_XP_TIMER
103 bool "Armada 370 and XP timer driver" if COMPILE_TEST
108 Enables the support for the Armada 370 and XP timer driver.
111 bool "Meson6 timer driver" if COMPILE_TEST
114 Enables the support for the Meson6 timer driver.
117 bool "Orion timer driver" if COMPILE_TEST
122 Enables the support for the Orion timer driver
125 bool "Owl timer driver" if COMPILE_TEST
128 Enables the support for the Actions Semi Owl timer driver.
131 bool "RDA timer driver" if COMPILE_TEST
135 Enables the support for the RDA Micro timer driver.
137 config REALTEK_OTTO_TIMER
138 bool "Clocksource/timer for the Realtek Otto platform" if COMPILE_TEST
141 This driver adds support for the timers found in the Realtek RTL83xx
142 and RTL93xx SoCs series. This includes chips such as RTL8380, RTL8381
143 and RTL832, as well as chips from the RTL839x series, such as RTL8390
144 RT8391, RTL8392, RTL8393 and RTL8396 and chips of the RTL930x series
145 such as RTL9301, RTL9302 or RTL9303.
148 bool "Sun4i timer driver" if COMPILE_TEST
153 Enables support for the Sun4i timer.
156 bool "Sun5i timer driver" if COMPILE_TEST
158 depends on COMMON_CLK
160 Enables support the Sun5i timer.
163 bool "Tegra timer driver" if COMPILE_TEST
166 depends on ARCH_TEGRA || COMPILE_TEST
168 Enables support for the Tegra driver.
170 config TEGRA186_TIMER
171 bool "NVIDIA Tegra186 timer driver"
172 depends on ARCH_TEGRA || COMPILE_TEST
173 depends on WATCHDOG && WATCHDOG_CORE
175 Enables support for the timers and watchdogs found on NVIDIA
176 Tegra186 and later SoCs.
179 bool "VT8500 timer driver" if COMPILE_TEST
182 Enables support for the VT8500 driver.
185 bool "NPCM7xx timer driver" if COMPILE_TEST
190 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
191 where TIMER0 serves as clockevent and TIMER1 serves as clocksource.
193 config CADENCE_TTC_TIMER
194 bool "Cadence TTC timer driver" if COMPILE_TEST
195 depends on COMMON_CLK
197 Enables support for the Cadence TTC driver.
200 bool "ASM9260 timer driver" if COMPILE_TEST
204 Enables support for the ASM9260 timer.
206 config CLKSRC_NOMADIK_MTU
207 bool "Nomakdik clocksource driver" if COMPILE_TEST
211 Support for Multi Timer Unit. MTU provides access
212 to multiple interrupt generating programmable
213 32-bit free running decrementing counters.
215 config CLKSRC_DBX500_PRCMU
216 bool "Clocksource PRCMU Timer" if COMPILE_TEST
219 Use the always on PRCMU Timer as clocksource.
221 config CLPS711X_TIMER
222 bool "Cirrus Logic timer driver" if COMPILE_TEST
225 Enables support for the Cirrus Logic PS711 timer.
228 bool "MXS timer driver" if COMPILE_TEST
232 Enables support for the MXS timer.
235 bool "NSpire timer driver" if COMPILE_TEST
238 Enables support for the Nspire timer.
240 config KEYSTONE_TIMER
241 bool "Keystone timer driver" if COMPILE_TEST
242 depends on ARM || ARM64
245 Enables support for the Keystone timer.
247 config INTEGRATOR_AP_TIMER
248 bool "Integrator-AP timer driver" if COMPILE_TEST
251 Enables support for the Integrator-AP timer.
253 config CLKSRC_LPC32XX
254 bool "Clocksource for LPC32XX" if COMPILE_TEST
260 Support for the LPC32XX clocksource.
262 config CLKSRC_PISTACHIO
263 bool "Clocksource for Pistachio SoC"
265 depends on MIPS || 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_GT_INITIAL_PRESCALER_VAL
389 int "ARM global timer initial prescaler value"
390 default 2 if ARCH_ZYNQ
392 depends on ARM_GLOBAL_TIMER
394 When the ARM global timer initializes, its current rate is declared
395 to the kernel and maintained forever. Should its parent clock
396 change, the driver tries to fix the timer's internal prescaler.
397 On some machs (i.e. Zynq) the initial prescaler value thus poses
398 bounds about how much the parent clock is allowed to decrease or
399 increase wrt the initial clock value.
400 This affects CPU_FREQ max delta from the initial frequency.
402 config ARM_TIMER_SP804
403 bool "Support for Dual Timer SP804 module"
404 depends on ARM || ARM64 || COMPILE_TEST
405 depends on GENERIC_SCHED_CLOCK && HAVE_CLK
407 select TIMER_OF if OF
409 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
411 depends on ARM_GLOBAL_TIMER
414 Use ARM global timer clock source as sched_clock.
416 config ARMV7M_SYSTICK
417 bool "Support for the ARMv7M system time" if COMPILE_TEST
418 select TIMER_OF if OF
421 This option enables support for the ARMv7M system timer unit.
424 bool "Atmel PIT support" if COMPILE_TEST
426 select TIMER_OF if OF
428 Support for the Periodic Interval Timer found on Atmel SoCs.
431 bool "Atmel ST timer support" if COMPILE_TEST
436 Support for the Atmel ST timer.
438 config ATMEL_TCB_CLKSRC
439 bool "Atmel TC Block timer driver" if COMPILE_TEST
440 depends on ARM && HAS_IOMEM
441 select TIMER_OF if OF
443 Support for Timer Counter Blocks on Atmel SoCs.
445 config CLKSRC_EXYNOS_MCT
446 bool "Exynos multi core timer driver" if COMPILE_TEST
447 depends on ARM || ARM64
448 depends on ARCH_ARTPEC || ARCH_EXYNOS || COMPILE_TEST
450 Support for Multi Core Timer controller on Exynos SoCs.
452 config CLKSRC_SAMSUNG_PWM
453 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
455 depends on ARCH_EXYNOS || ARCH_S3C64XX || ARCH_S5PV210 || COMPILE_TEST
457 This is a new clocksource driver for the PWM timer found in
458 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
459 for all devicetree enabled platforms. This driver will be
460 needed only on systems that do not have the Exynos MCT available.
463 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
467 Support for Freescale FlexTimer Module (FTM) timer.
473 Support for Periodic Interrupt Timer on Freescale Vybrid Family SoCs.
475 config SYS_SUPPORTS_SH_CMT
479 bool "Mediatek timer driver" if COMPILE_TEST
484 Support for Mediatek timer driver.
486 config MTK_CPUX_TIMER
487 bool "MediaTek CPUX timer driver" if COMPILE_TEST
489 default ARCH_MEDIATEK
493 Support for MediaTek CPUXGPT timer driver.
496 bool "Spreadtrum timer driver" if EXPERT
498 depends on (ARCH_SPRD || COMPILE_TEST)
502 Enables support for the Spreadtrum timer driver.
504 config SYS_SUPPORTS_SH_MTU2
507 config SYS_SUPPORTS_SH_TMU
510 config SYS_SUPPORTS_EM_STI
513 config CLKSRC_JCORE_PIT
514 bool "J-Core PIT timer driver" if COMPILE_TEST
519 This enables build of clocksource and clockevent driver for
520 the integrated PIT in the J-Core synthesizable, open source SoC.
523 bool "Renesas CMT timer driver" if COMPILE_TEST
525 default SYS_SUPPORTS_SH_CMT
527 This enables build of a clocksource and clockevent driver for
528 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
529 variants on a wide range of Mobile and Automotive SoCs from Renesas.
532 bool "Renesas MTU2 timer driver" if COMPILE_TEST
534 default SYS_SUPPORTS_SH_MTU2
536 This enables build of a clockevent driver for the Multi-Function
537 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
538 This hardware comes with 16-bit timer registers.
541 bool "Renesas OSTM timer driver"
542 depends on ARCH_RENESAS || COMPILE_TEST
546 Enables the support for the Renesas OSTM.
549 bool "Renesas TMU timer driver" if COMPILE_TEST
551 default SYS_SUPPORTS_SH_TMU
553 This enables build of a clocksource and clockevent driver for
554 the 32-bit Timer Unit (TMU) hardware available on a wide range
558 bool "Renesas STI timer driver" if COMPILE_TEST
560 default SYS_SUPPORTS_EM_STI
562 This enables build of a clocksource and clockevent driver for
563 the 48-bit System Timer (STI) hardware available on a SoCs
564 such as EMEV2 from former NEC Electronics.
567 bool "Qualcomm MSM timer" if COMPILE_TEST
571 This enables the clocksource and the per CPU clockevent driver for the
574 config CLKSRC_VERSATILE
575 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
576 depends on GENERIC_SCHED_CLOCK
578 default y if (ARCH_VEXPRESS || ARCH_VERSATILE) && ARM
580 This option enables clock source based on free running
581 counter available in the "System Registers" block of
582 ARM Versatile and Versatile Express reference platforms.
584 config CLKSRC_MIPS_GIC
587 select CLOCKSOURCE_WATCHDOG
591 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
595 This enables OST0 support available on PXA and SA-11x0
598 config CLKSRC_IMX_GPT
599 bool "Clocksource using i.MX GPT" if COMPILE_TEST
600 depends on (ARM || ARM64) && HAVE_CLK
603 config CLKSRC_IMX_TPM
604 bool "Clocksource using i.MX TPM" if COMPILE_TEST
605 depends on (ARM || ARM64) && HAVE_CLK
609 Enable this option to use IMX Timer/PWM Module (TPM) timer as
612 config TIMER_IMX_SYS_CTR
613 bool "i.MX system counter timer" if COMPILE_TEST
616 Enable this option to use i.MX system counter timer as a
619 config CLKSRC_LOONGSON1_PWM
620 bool "Clocksource using Loongson1 PWM"
621 depends on MACH_LOONGSON32 || COMPILE_TEST
622 select MIPS_EXTERNAL_TIMER
625 Enable this option to use Loongson1 PWM timer as clocksource
626 instead of the performance counter.
629 bool "Low power clocksource found in the LPC" if COMPILE_TEST
630 select TIMER_OF if OF
634 Enable this option to use the Low Power controller timer
638 bool "GXP timer driver" if COMPILE_TEST && !ARCH_HPE
640 select TIMER_OF if OF
642 Provides a driver for the timer control found on HPE
643 GXP SOCs. This is required for all GXP SOCs.
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 "MSC313E timer driver" if COMPILE_TEST
696 Enables support for the MStar MSC313E timer driver.
697 This provides access to multiple interrupt generating
698 programmable 32-bit free running incrementing counters.
701 bool "Clocksource/timer using the TCU in Ingenic JZ SoCs"
703 depends on MIPS || COMPILE_TEST
704 depends on COMMON_CLK
709 Support for the timer/counter unit of the Ingenic JZ SoCs.
711 config INGENIC_SYSOST
712 bool "Clocksource/timer using the SYSOST in Ingenic X SoCs"
713 depends on MIPS || COMPILE_TEST
714 depends on COMMON_CLK
719 Support for the SYSOST of the Ingenic X Series SoCs.
722 bool "Clocksource using the OST in Ingenic JZ SoCs"
723 depends on MIPS || COMPILE_TEST
724 depends on COMMON_CLK
727 Support for the Operating System Timer of the Ingenic JZ SoCs.
729 config MICROCHIP_PIT64B
730 bool "Microchip PIT64B support"
734 This option enables Microchip PIT64B timer for Atmel
735 based system. It supports the oneshot, the periodic
736 modes and high resolution. It is used as a clocksource
739 config GOLDFISH_TIMER
740 bool "Clocksource using goldfish-rtc"
741 depends on M68K || COMPILE_TEST
742 depends on RTC_DRV_GOLDFISH
744 Support for the timer/counter of goldfish-rtc
747 bool "Cirrus Logic ep93xx timer driver" if COMPILE_TEST
748 depends on ARCH_EP93XX
749 depends on GENERIC_CLOCKEVENTS
754 Enables support for the Cirrus Logic timer block
758 bool "Ralink System Tick Counter"
759 depends on SOC_RT305X || SOC_MT7620 || COMPILE_TEST
763 Enables support for system tick counter present on
764 Ralink SoCs RT3352 and MT7620.