1 menu "Clock Source drivers"
2 depends on !ARCH_USES_GETTIMEOFFSET
6 depends on GENERIC_CLOCKEVENTS
26 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
32 bool "BCM2835 timer driver" if COMPILE_TEST
33 depends on GENERIC_CLOCKEVENTS
36 Enables the support for the BCM2835 timer driver.
39 bool "BCM mobile timer driver" if COMPILE_TEST
40 depends on GENERIC_CLOCKEVENTS
43 Enables the support for the BCM Kona mobile timer driver.
45 config DIGICOLOR_TIMER
46 bool "Digicolor timer driver" if COMPILE_TEST
47 depends on GENERIC_CLOCKEVENTS
51 Enables the support for the digicolor timer driver.
54 bool "DW APB timer driver" if COMPILE_TEST
55 depends on GENERIC_CLOCKEVENTS
57 Enables the support for the dw_apb timer.
59 config DW_APB_TIMER_OF
65 bool "Faraday Technology timer driver" if COMPILE_TEST
66 depends on GENERIC_CLOCKEVENTS
72 Enables support for the Faraday Technology timer block
76 bool "Rockchip timer driver" if COMPILE_TEST
77 depends on ARM || ARM64
81 Enables the support for the rockchip timer driver.
83 config ARMADA_370_XP_TIMER
84 bool "Armada 370 and XP timer driver" if COMPILE_TEST
89 Enables the support for the Armada 370 and XP timer driver.
92 bool "Meson6 timer driver" if COMPILE_TEST
93 depends on GENERIC_CLOCKEVENTS
96 Enables the support for the Meson6 timer driver.
99 bool "Orion timer driver" if COMPILE_TEST
104 Enables the support for the Orion timer driver
107 bool "Owl timer driver" if COMPILE_TEST
108 depends on GENERIC_CLOCKEVENTS
111 Enables the support for the Actions Semi Owl timer driver.
114 bool "Sun4i timer driver" if COMPILE_TEST
115 depends on GENERIC_CLOCKEVENTS
120 Enables support for the Sun4i timer.
123 bool "Sun5i timer driver" if COMPILE_TEST
125 depends on COMMON_CLK
127 Enables support the Sun5i timer.
130 bool "Tegra timer driver" if COMPILE_TEST
134 Enables support for the Tegra driver.
137 bool "VT8500 timer driver" if COMPILE_TEST
138 depends on GENERIC_CLOCKEVENTS
141 Enables support for the VT8500 driver.
143 config CADENCE_TTC_TIMER
144 bool "Cadence TTC timer driver" if COMPILE_TEST
145 depends on COMMON_CLK
147 Enables support for the cadence ttc driver.
150 bool "ASM9260 timer driver" if COMPILE_TEST
151 depends on GENERIC_CLOCKEVENTS
155 Enables support for the ASM9260 timer.
157 config CLKSRC_NOMADIK_MTU
158 bool "Nomakdik clocksource driver" if COMPILE_TEST
162 Support for Multi Timer Unit. MTU provides access
163 to multiple interrupt generating programmable
164 32-bit free running decrementing counters.
166 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
168 depends on CLKSRC_NOMADIK_MTU
170 Use the Multi Timer Unit as the sched_clock.
172 config CLKSRC_DBX500_PRCMU
173 bool "Clocksource PRCMU Timer" if COMPILE_TEST
174 depends on GENERIC_CLOCKEVENTS
177 Use the always on PRCMU Timer as clocksource
179 config CLPS711X_TIMER
180 bool "Cirrus logic timer driver" if COMPILE_TEST
181 depends on GENERIC_CLOCKEVENTS
184 Enables support for the Cirrus Logic PS711 timer.
187 bool "Atlas7 timer driver" if COMPILE_TEST
188 depends on GENERIC_CLOCKEVENTS
191 Enables support for the Atlas7 timer.
194 bool "Mxs timer driver" if COMPILE_TEST
195 depends on GENERIC_CLOCKEVENTS
199 Enables support for the Mxs timer.
202 bool "Prima2 timer driver" if COMPILE_TEST
203 depends on GENERIC_CLOCKEVENTS
206 Enables support for the Prima2 timer.
209 bool "U300 timer driver" if COMPILE_TEST
210 depends on GENERIC_CLOCKEVENTS
214 Enables support for the U300 timer.
217 bool "NSpire timer driver" if COMPILE_TEST
218 depends on GENERIC_CLOCKEVENTS
221 Enables support for the Nspire timer.
223 config KEYSTONE_TIMER
224 bool "Keystone timer driver" if COMPILE_TEST
225 depends on GENERIC_CLOCKEVENTS
226 depends on ARM || ARM64
229 Enables support for the Keystone timer.
231 config INTEGRATOR_AP_TIMER
232 bool "Integrator-ap timer driver" if COMPILE_TEST
233 depends on GENERIC_CLOCKEVENTS
236 Enables support for the Integrator-ap timer.
238 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
239 bool "Clocksource PRCMU Timer sched_clock"
240 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
243 Use the always on PRCMU Timer as sched_clock
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
256 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
261 Support for the LPC32XX clocksource.
263 config CLKSRC_PISTACHIO
264 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
265 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
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 "NPS400 clocksource driver" if COMPILE_TEST
280 depends on !PHYS_ADDR_T_64BIT
282 select TIMER_OF if OF
284 NPS400 clocksource support.
285 Got 64 bit counter with update rate up to 1000MHz.
286 This counter is accessed via couple of 32 bit memory mapped registers.
289 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
290 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
294 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
295 depends on GENERIC_SCHED_CLOCK
300 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
301 depends on GENERIC_CLOCKEVENTS
304 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
305 (ARC700 as well as ARC HS38).
306 TIMER0 serves as clockevent while TIMER1 provides clocksource
308 config ARC_TIMERS_64BIT
309 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
310 depends on GENERIC_CLOCKEVENTS
311 depends on ARC_TIMERS
314 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
315 RTC is implemented inside the core, while GFRC sits outside the core in
316 ARConnect IP block. Driver automatically picks one of them for clocksource
319 config ARM_ARCH_TIMER
321 select TIMER_OF if OF
322 select TIMER_ACPI if ACPI
324 config ARM_ARCH_TIMER_EVTSTREAM
325 bool "Enable ARM architected timer event stream generation by default"
326 default y if ARM_ARCH_TIMER
327 depends on ARM_ARCH_TIMER
329 This option enables support by default for event stream generation
330 based on the ARM architected timer. It is used for waking up CPUs
331 executing the wfe instruction at a frequency represented as a
332 power-of-2 divisor of the clock rate. The behaviour can also be
333 overridden on the command line using the
334 clocksource.arm_arch_timer.evtstream parameter.
335 The main use of the event stream is wfe-based timeouts of userspace
336 locking implementations. It might also be useful for imposing timeout
337 on wfe to safeguard against any programming errors in case an expected
338 event is not generated.
339 This must be disabled for hardware validation purposes to detect any
340 hardware anomalies of missing events.
342 config ARM_ARCH_TIMER_OOL_WORKAROUND
345 config FSL_ERRATUM_A008585
346 bool "Workaround for Freescale/NXP Erratum A-008585"
348 depends on ARM_ARCH_TIMER && ARM64
349 select ARM_ARCH_TIMER_OOL_WORKAROUND
351 This option enables a workaround for Freescale/NXP Erratum
352 A-008585 ("ARM generic timer may contain an erroneous
353 value"). The workaround will only be active if the
354 fsl,erratum-a008585 property is found in the timer node.
356 config HISILICON_ERRATUM_161010101
357 bool "Workaround for Hisilicon Erratum 161010101"
359 select ARM_ARCH_TIMER_OOL_WORKAROUND
360 depends on ARM_ARCH_TIMER && ARM64
362 This option enables a workaround for Hisilicon Erratum
363 161010101. The workaround will be active if the hisilicon,erratum-161010101
364 property is found in the timer node.
366 config ARM64_ERRATUM_858921
367 bool "Workaround for Cortex-A73 erratum 858921"
369 select ARM_ARCH_TIMER_OOL_WORKAROUND
370 depends on ARM_ARCH_TIMER && ARM64
372 This option enables a workaround applicable to Cortex-A73
373 (all versions), whose counter may return incorrect values.
374 The workaround will be dynamically enabled when an affected
377 config ARM_GLOBAL_TIMER
378 bool "Support for the ARM global timer" if COMPILE_TEST
379 select TIMER_OF if OF
382 This options enables support for the ARM global timer unit
384 config ARM_TIMER_SP804
385 bool "Support for Dual Timer SP804 module"
386 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
388 select TIMER_OF if OF
390 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
392 depends on ARM_GLOBAL_TIMER
395 Use ARM global timer clock source as sched_clock
397 config ARMV7M_SYSTICK
398 bool "Support for the ARMv7M system time" if COMPILE_TEST
399 select TIMER_OF if OF
402 This options enables support for the ARMv7M system timer unit
405 select TIMER_OF if OF
406 def_bool SOC_AT91SAM9 || SOC_SAMA5
409 bool "Atmel ST timer support" if COMPILE_TEST
410 depends on GENERIC_CLOCKEVENTS
414 Support for the Atmel ST timer.
416 config CLKSRC_METAG_GENERIC
419 This option enables support for the Meta per-thread timers.
421 config CLKSRC_EXYNOS_MCT
422 bool "Exynos multi core timer driver" if COMPILE_TEST
423 depends on ARM || ARM64
425 Support for Multi Core Timer controller on Exynos SoCs.
427 config CLKSRC_SAMSUNG_PWM
428 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
429 depends on GENERIC_CLOCKEVENTS
432 This is a new clocksource driver for the PWM timer found in
433 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
434 for all devicetree enabled platforms. This driver will be
435 needed only on systems that do not have the Exynos MCT available.
438 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
439 depends on GENERIC_CLOCKEVENTS
443 Support for Freescale FlexTimer Module (FTM) timer.
449 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
451 config OXNAS_RPS_TIMER
452 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
453 depends on GENERIC_CLOCKEVENTS
457 This enables support for the Oxford Semiconductor OXNAS RPS timers.
459 config SYS_SUPPORTS_SH_CMT
463 bool "Mediatek timer driver" if COMPILE_TEST
464 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
468 Support for Mediatek timer driver.
470 config SYS_SUPPORTS_SH_MTU2
473 config SYS_SUPPORTS_SH_TMU
476 config SYS_SUPPORTS_EM_STI
479 config CLKSRC_JCORE_PIT
480 bool "J-Core PIT timer driver" if COMPILE_TEST
482 depends on GENERIC_CLOCKEVENTS
486 This enables build of clocksource and clockevent driver for
487 the integrated PIT in the J-Core synthesizable, open source SoC.
490 bool "Renesas CMT timer driver" if COMPILE_TEST
491 depends on GENERIC_CLOCKEVENTS
493 default SYS_SUPPORTS_SH_CMT
495 This enables build of a clocksource and clockevent driver for
496 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
497 variants on a wide range of Mobile and Automotive SoCs from Renesas.
500 bool "Renesas MTU2 timer driver" if COMPILE_TEST
501 depends on GENERIC_CLOCKEVENTS
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
511 depends on GENERIC_CLOCKEVENTS
514 Enables the support for the Renesas OSTM.
517 bool "Renesas TMU timer driver" if COMPILE_TEST
518 depends on GENERIC_CLOCKEVENTS
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
528 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
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 && !ARCH_USES_GETTIMEOFFSET
547 default y if MFD_VEXPRESS_SYSREG
549 This option enables clock source based on free running
550 counter available in the "System Registers" block of
551 ARM Versatile, RealView and Versatile Express reference
554 config CLKSRC_MIPS_GIC
559 config CLKSRC_TANGO_XTAL
560 bool "Clocksource for Tango SoC" if COMPILE_TEST
565 This enables the clocksource for Tango SoC
568 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
569 depends on GENERIC_CLOCKEVENTS
573 This enables OST0 support available on PXA and SA-11x0
577 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
578 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
580 This enables the 8 bits timer for the H8300 platform.
583 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
584 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
586 This enables the 16 bits timer for the H8300 platform with the
590 bool "Clocksource for the H8300 platform" if COMPILE_TEST
591 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
593 This enables the clocksource for the H8300 platform with the
596 config CLKSRC_IMX_GPT
597 bool "Clocksource using i.MX GPT" if COMPILE_TEST
598 depends on ARM && CLKDEV_LOOKUP
601 config CLKSRC_IMX_TPM
602 bool "Clocksource using i.MX TPM" if COMPILE_TEST
603 depends on ARM && CLKDEV_LOOKUP && GENERIC_CLOCKEVENTS
606 Enable this option to use IMX Timer/PWM Module (TPM) timer as
610 bool "Low power clocksource found in the LPC" if COMPILE_TEST
611 select TIMER_OF if OF
615 Enable this option to use the Low Power controller timer