1 menu "Clock Source drivers"
2 depends on GENERIC_CLOCKEVENTS
28 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
34 bool "BCM2835 timer driver" if COMPILE_TEST
37 Enables the support for the BCM2835 timer driver.
40 bool "BCM mobile timer driver" if COMPILE_TEST
43 Enables the support for the BCM Kona mobile timer driver.
45 config DIGICOLOR_TIMER
46 bool "Digicolor timer driver" if COMPILE_TEST
50 Enables the support for the digicolor timer driver.
53 bool "DW APB timer driver" if COMPILE_TEST
55 Enables the support for the dw_apb timer.
57 config DW_APB_TIMER_OF
63 bool "Faraday Technology timer driver" if COMPILE_TEST
69 Enables support for the Faraday Technology timer block
73 bool "Rockchip timer driver" if COMPILE_TEST
74 depends on ARM || ARM64
78 Enables the support for the rockchip timer driver.
80 config ARMADA_370_XP_TIMER
81 bool "Armada 370 and XP timer driver" if COMPILE_TEST
86 Enables the support for the Armada 370 and XP timer driver.
89 bool "Meson6 timer driver" if COMPILE_TEST
92 Enables the support for the Meson6 timer driver.
95 bool "Orion timer driver" if COMPILE_TEST
100 Enables the support for the Orion timer driver
103 bool "Owl timer driver" if COMPILE_TEST
106 Enables the support for the Actions Semi Owl timer driver.
109 bool "Sun4i timer driver" if COMPILE_TEST
114 Enables support for the Sun4i timer.
117 bool "Sun5i timer driver" if COMPILE_TEST
119 depends on COMMON_CLK
121 Enables support the Sun5i timer.
124 bool "Tegra timer driver" if COMPILE_TEST
128 Enables support for the Tegra driver.
131 bool "VT8500 timer driver" if COMPILE_TEST
134 Enables support for the VT8500 driver.
137 bool "NPCM7xx timer driver" if COMPILE_TEST
141 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
142 While TIMER0 serves as clockevent and TIMER1 serves as clocksource.
144 config CADENCE_TTC_TIMER
145 bool "Cadence TTC timer driver" if COMPILE_TEST
146 depends on COMMON_CLK
148 Enables support for the cadence ttc driver.
151 bool "ASM9260 timer driver" if COMPILE_TEST
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
176 Use the always on PRCMU Timer as clocksource
178 config CLPS711X_TIMER
179 bool "Cirrus logic timer driver" if COMPILE_TEST
182 Enables support for the Cirrus Logic PS711 timer.
185 bool "Atlas7 timer driver" if COMPILE_TEST
188 Enables support for the Atlas7 timer.
191 bool "Mxs timer driver" if COMPILE_TEST
195 Enables support for the Mxs timer.
198 bool "Prima2 timer driver" if COMPILE_TEST
201 Enables support for the Prima2 timer.
204 bool "U300 timer driver" if COMPILE_TEST
208 Enables support for the U300 timer.
211 bool "NSpire timer driver" if COMPILE_TEST
214 Enables support for the Nspire timer.
216 config KEYSTONE_TIMER
217 bool "Keystone timer driver" if COMPILE_TEST
218 depends on ARM || ARM64
221 Enables support for the Keystone timer.
223 config INTEGRATOR_AP_TIMER
224 bool "Integrator-ap timer driver" if COMPILE_TEST
227 Enables support for the Integrator-ap timer.
229 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
230 bool "Clocksource PRCMU Timer sched_clock"
231 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
234 Use the always on PRCMU Timer as sched_clock
237 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
238 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
242 Support to use the timers of EFM32 SoCs as clock source and clock
245 config CLKSRC_LPC32XX
246 bool "Clocksource for LPC32XX" if COMPILE_TEST
252 Support for the LPC32XX clocksource.
254 config CLKSRC_PISTACHIO
255 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
259 Enables the clocksource for the Pistachio SoC.
262 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
263 depends on GENERIC_SCHED_CLOCK
264 select TIMER_OF if OF
266 This option enables support for Texas Instruments 32.768 Hz clocksource
267 available on many OMAP-like platforms.
270 bool "NPS400 clocksource driver" if COMPILE_TEST
271 depends on !PHYS_ADDR_T_64BIT
273 select TIMER_OF if OF
275 NPS400 clocksource support.
276 Got 64 bit counter with update rate up to 1000MHz.
277 This counter is accessed via couple of 32 bit memory mapped registers.
280 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
281 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
286 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
287 depends on GENERIC_SCHED_CLOCK
292 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
293 depends on GENERIC_SCHED_CLOCK
296 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
297 (ARC700 as well as ARC HS38).
298 TIMER0 serves as clockevent while TIMER1 provides clocksource
300 config ARC_TIMERS_64BIT
301 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
302 depends on ARC_TIMERS
305 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
306 RTC is implemented inside the core, while GFRC sits outside the core in
307 ARConnect IP block. Driver automatically picks one of them for clocksource
310 config ARM_ARCH_TIMER
312 select TIMER_OF if OF
313 select TIMER_ACPI if ACPI
315 config ARM_ARCH_TIMER_EVTSTREAM
316 bool "Enable ARM architected timer event stream generation by default"
317 default y if ARM_ARCH_TIMER
318 depends on ARM_ARCH_TIMER
320 This option enables support by default for event stream generation
321 based on the ARM architected timer. It is used for waking up CPUs
322 executing the wfe instruction at a frequency represented as a
323 power-of-2 divisor of the clock rate. The behaviour can also be
324 overridden on the command line using the
325 clocksource.arm_arch_timer.evtstream parameter.
326 The main use of the event stream is wfe-based timeouts of userspace
327 locking implementations. It might also be useful for imposing timeout
328 on wfe to safeguard against any programming errors in case an expected
329 event is not generated.
330 This must be disabled for hardware validation purposes to detect any
331 hardware anomalies of missing events.
333 config ARM_ARCH_TIMER_OOL_WORKAROUND
336 config FSL_ERRATUM_A008585
337 bool "Workaround for Freescale/NXP Erratum A-008585"
339 depends on ARM_ARCH_TIMER && ARM64
340 select ARM_ARCH_TIMER_OOL_WORKAROUND
342 This option enables a workaround for Freescale/NXP Erratum
343 A-008585 ("ARM generic timer may contain an erroneous
344 value"). The workaround will only be active if the
345 fsl,erratum-a008585 property is found in the timer node.
347 config HISILICON_ERRATUM_161010101
348 bool "Workaround for Hisilicon Erratum 161010101"
350 select ARM_ARCH_TIMER_OOL_WORKAROUND
351 depends on ARM_ARCH_TIMER && ARM64
353 This option enables a workaround for Hisilicon Erratum
354 161010101. The workaround will be active if the hisilicon,erratum-161010101
355 property is found in the timer node.
357 config ARM64_ERRATUM_858921
358 bool "Workaround for Cortex-A73 erratum 858921"
360 select ARM_ARCH_TIMER_OOL_WORKAROUND
361 depends on ARM_ARCH_TIMER && ARM64
363 This option enables a workaround applicable to Cortex-A73
364 (all versions), whose counter may return incorrect values.
365 The workaround will be dynamically enabled when an affected
368 config ARM_GLOBAL_TIMER
369 bool "Support for the ARM global timer" if COMPILE_TEST
370 select TIMER_OF if OF
373 This options enables support for the ARM global timer unit
375 config ARM_TIMER_SP804
376 bool "Support for Dual Timer SP804 module"
377 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
379 select TIMER_OF if OF
381 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
383 depends on ARM_GLOBAL_TIMER
386 Use ARM global timer clock source as sched_clock
388 config ARMV7M_SYSTICK
389 bool "Support for the ARMv7M system time" if COMPILE_TEST
390 select TIMER_OF if OF
393 This options enables support for the ARMv7M system timer unit
396 select TIMER_OF if OF
397 def_bool SOC_AT91SAM9 || SOC_SAMA5
400 bool "Atmel ST timer support" if COMPILE_TEST
405 Support for the Atmel ST timer.
407 config CLKSRC_EXYNOS_MCT
408 bool "Exynos multi core timer driver" if COMPILE_TEST
409 depends on ARM || ARM64
411 Support for Multi Core Timer controller on Exynos SoCs.
413 config CLKSRC_SAMSUNG_PWM
414 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
417 This is a new clocksource driver for the PWM timer found in
418 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
419 for all devicetree enabled platforms. This driver will be
420 needed only on systems that do not have the Exynos MCT available.
423 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
427 Support for Freescale FlexTimer Module (FTM) timer.
433 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
435 config OXNAS_RPS_TIMER
436 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
440 This enables support for the Oxford Semiconductor OXNAS RPS timers.
442 config SYS_SUPPORTS_SH_CMT
446 bool "Mediatek timer driver" if COMPILE_TEST
451 Support for Mediatek timer driver.
454 bool "Spreadtrum timer driver" if EXPERT
456 depends on (ARCH_SPRD || COMPILE_TEST)
460 Enables support for the Spreadtrum timer driver.
462 config SYS_SUPPORTS_SH_MTU2
465 config SYS_SUPPORTS_SH_TMU
468 config SYS_SUPPORTS_EM_STI
471 config CLKSRC_JCORE_PIT
472 bool "J-Core PIT timer driver" if COMPILE_TEST
477 This enables build of clocksource and clockevent driver for
478 the integrated PIT in the J-Core synthesizable, open source SoC.
481 bool "Renesas CMT timer driver" if COMPILE_TEST
483 default SYS_SUPPORTS_SH_CMT
485 This enables build of a clocksource and clockevent driver for
486 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
487 variants on a wide range of Mobile and Automotive SoCs from Renesas.
490 bool "Renesas MTU2 timer driver" if COMPILE_TEST
492 default SYS_SUPPORTS_SH_MTU2
494 This enables build of a clockevent driver for the Multi-Function
495 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
496 This hardware comes with 16 bit-timer registers.
499 bool "Renesas OSTM timer driver" if COMPILE_TEST
502 Enables the support for the Renesas OSTM.
505 bool "Renesas TMU timer driver" if COMPILE_TEST
507 default SYS_SUPPORTS_SH_TMU
509 This enables build of a clocksource and clockevent driver for
510 the 32-bit Timer Unit (TMU) hardware available on a wide range
514 bool "Renesas STI timer driver" if COMPILE_TEST
516 default SYS_SUPPORTS_EM_STI
518 This enables build of a clocksource and clockevent driver for
519 the 48-bit System Timer (STI) hardware available on a SoCs
520 such as EMEV2 from former NEC Electronics.
523 bool "Qualcomm MSM timer" if COMPILE_TEST
527 This enables the clocksource and the per CPU clockevent driver for the
530 config CLKSRC_VERSATILE
531 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
532 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
534 default y if MFD_VEXPRESS_SYSREG
536 This option enables clock source based on free running
537 counter available in the "System Registers" block of
538 ARM Versatile, RealView and Versatile Express reference
541 config CLKSRC_MIPS_GIC
546 config CLKSRC_TANGO_XTAL
547 bool "Clocksource for Tango SoC" if COMPILE_TEST
552 This enables the clocksource for Tango SoC
555 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
559 This enables OST0 support available on PXA and SA-11x0
563 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
566 This enables the 8 bits timer for the H8300 platform.
569 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
572 This enables the 16 bits timer for the H8300 platform with the
576 bool "Clocksource for the H8300 platform" if COMPILE_TEST
579 This enables the clocksource for the H8300 platform with the
582 config CLKSRC_IMX_GPT
583 bool "Clocksource using i.MX GPT" if COMPILE_TEST
584 depends on ARM && CLKDEV_LOOKUP
587 config CLKSRC_IMX_TPM
588 bool "Clocksource using i.MX TPM" if COMPILE_TEST
589 depends on ARM && CLKDEV_LOOKUP
592 Enable this option to use IMX Timer/PWM Module (TPM) timer as
596 bool "Low power clocksource found in the LPC" if COMPILE_TEST
597 select TIMER_OF if OF
601 Enable this option to use the Low Power controller timer
604 config ATCPIT100_TIMER
605 bool "ATCPIT100 timer driver"
606 depends on NDS32 || COMPILE_TEST
611 This option enables support for the Andestech ATCPIT100 timers.
614 bool "Timer for the RISC-V platform"
620 This enables the per-hart timer built into all RISC-V systems, which
621 is accessed via both the SBI and the rdcycle instruction. This is
622 required for all RISC-V systems.