1 menu "Clock Source drivers"
2 depends on !ARCH_USES_GETTIMEOFFSET
25 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
31 bool "BCM2835 timer driver" if COMPILE_TEST
32 depends on GENERIC_CLOCKEVENTS
35 Enables the support for the BCM2835 timer driver.
38 bool "BCM mobile timer driver" if COMPILE_TEST
39 depends on GENERIC_CLOCKEVENTS
42 Enables the support for the BCM Kona mobile timer driver.
44 config DIGICOLOR_TIMER
45 bool "Digicolor timer driver" if COMPILE_TEST
46 depends on GENERIC_CLOCKEVENTS
50 Enables the support for the digicolor timer driver.
53 bool "DW APB timer driver" if COMPILE_TEST
54 depends on GENERIC_CLOCKEVENTS
56 Enables the support for the dw_apb timer.
58 config DW_APB_TIMER_OF
64 bool "Rockchip timer driver" if COMPILE_TEST
65 depends on ARM || ARM64
68 Enables the support for the rockchip timer driver.
70 config ARMADA_370_XP_TIMER
71 bool "Armada 370 and XP timer driver" if COMPILE_TEST
76 Enables the support for the Armada 370 and XP timer driver.
79 bool "Meson6 timer driver" if COMPILE_TEST
80 depends on GENERIC_CLOCKEVENTS
83 Enables the support for the Meson6 timer driver.
86 bool "Orion timer driver" if COMPILE_TEST
91 Enables the support for the Orion timer driver
94 bool "Sun4i timer driver" if COMPILE_TEST
95 depends on GENERIC_CLOCKEVENTS
99 Enables support for the Sun4i timer.
102 bool "Sun5i timer driver" if COMPILE_TEST
104 depends on COMMON_CLK
106 Enables support the Sun5i timer.
109 bool "Tegra timer driver" if COMPILE_TEST
113 Enables support for the Tegra driver.
116 bool "VT8500 timer driver" if COMPILE_TEST
117 depends on GENERIC_CLOCKEVENTS
120 Enables support for the VT8500 driver.
122 config CADENCE_TTC_TIMER
123 bool "Cadence TTC timer driver" if COMPILE_TEST
124 depends on COMMON_CLK
126 Enables support for the cadence ttc driver.
129 bool "ASM9260 timer driver" if COMPILE_TEST
130 depends on GENERIC_CLOCKEVENTS
134 Enables support for the ASM9260 timer.
136 config CLKSRC_NOMADIK_MTU
137 bool "Nomakdik clocksource driver" if COMPILE_TEST
141 Support for Multi Timer Unit. MTU provides access
142 to multiple interrupt generating programmable
143 32-bit free running decrementing counters.
145 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
147 depends on CLKSRC_NOMADIK_MTU
149 Use the Multi Timer Unit as the sched_clock.
151 config CLKSRC_DBX500_PRCMU
152 bool "Clocksource PRCMU Timer" if COMPILE_TEST
153 depends on GENERIC_CLOCKEVENTS
156 Use the always on PRCMU Timer as clocksource
158 config CLPS711X_TIMER
159 bool "Cirrus logic timer driver" if COMPILE_TEST
160 depends on GENERIC_CLOCKEVENTS
163 Enables support for the Cirrus Logic PS711 timer.
166 bool "Atlas7 timer driver" if COMPILE_TEST
167 depends on GENERIC_CLOCKEVENTS
170 Enables support for the Atlas7 timer.
173 bool "Moxart timer driver" if COMPILE_TEST
174 depends on GENERIC_CLOCKEVENTS
177 Enables support for the Moxart timer.
180 bool "Mxs timer driver" if COMPILE_TEST
181 depends on GENERIC_CLOCKEVENTS
185 Enables support for the Mxs timer.
188 bool "Prima2 timer driver" if COMPILE_TEST
189 depends on GENERIC_CLOCKEVENTS
192 Enables support for the Prima2 timer.
195 bool "U300 timer driver" if COMPILE_TEST
196 depends on GENERIC_CLOCKEVENTS
200 Enables support for the U300 timer.
203 bool "NSpire timer driver" if COMPILE_TEST
204 depends on GENERIC_CLOCKEVENTS
207 Enables support for the Nspire timer.
209 config KEYSTONE_TIMER
210 bool "Keystone timer driver" if COMPILE_TEST
211 depends on GENERIC_CLOCKEVENTS
212 depends on ARM || ARM64
215 Enables support for the Keystone timer.
217 config INTEGRATOR_AP_TIMER
218 bool "Integrator-ap timer driver" if COMPILE_TEST
219 depends on GENERIC_CLOCKEVENTS
222 Enables support for the Integrator-ap timer.
224 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
225 bool "Clocksource PRCMU Timer sched_clock"
226 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
229 Use the always on PRCMU Timer as sched_clock
232 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
233 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
237 Support to use the timers of EFM32 SoCs as clock source and clock
240 config CLKSRC_LPC32XX
241 bool "Clocksource for LPC32XX" if COMPILE_TEST
242 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
247 Support for the LPC32XX clocksource.
249 config CLKSRC_PISTACHIO
250 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
254 Enables the clocksource for the Pistachio SoC.
257 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
258 depends on GENERIC_SCHED_CLOCK
259 select CLKSRC_OF if OF
261 This option enables support for Texas Instruments 32.768 Hz clocksource
262 available on many OMAP-like platforms.
265 bool "NPS400 clocksource driver" if COMPILE_TEST
266 depends on !PHYS_ADDR_T_64BIT
268 select CLKSRC_OF if OF
270 NPS400 clocksource support.
271 Got 64 bit counter with update rate up to 1000MHz.
272 This counter is accessed via couple of 32 bit memory mapped registers.
275 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
276 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
280 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
281 depends on GENERIC_SCHED_CLOCK
286 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
287 depends on GENERIC_CLOCKEVENTS
290 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
291 (ARC700 as well as ARC HS38).
292 TIMER0 serves as clockevent while TIMER1 provides clocksource
294 config ARC_TIMERS_64BIT
295 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
296 depends on GENERIC_CLOCKEVENTS
297 depends on ARC_TIMERS
300 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
301 RTC is implemented inside the core, while GFRC sits outside the core in
302 ARConnect IP block. Driver automatically picks one of them for clocksource
305 config ARM_ARCH_TIMER
307 select CLKSRC_OF if OF
308 select CLKSRC_ACPI if ACPI
310 config ARM_ARCH_TIMER_EVTSTREAM
311 bool "Enable ARM architected timer event stream generation by default"
312 default y if ARM_ARCH_TIMER
313 depends on ARM_ARCH_TIMER
315 This option enables support by default for event stream generation
316 based on the ARM architected timer. It is used for waking up CPUs
317 executing the wfe instruction at a frequency represented as a
318 power-of-2 divisor of the clock rate. The behaviour can also be
319 overridden on the command line using the
320 clocksource.arm_arch_timer.evtstream parameter.
321 The main use of the event stream is wfe-based timeouts of userspace
322 locking implementations. It might also be useful for imposing timeout
323 on wfe to safeguard against any programming errors in case an expected
324 event is not generated.
325 This must be disabled for hardware validation purposes to detect any
326 hardware anomalies of missing events.
328 config ARM_ARCH_TIMER_OOL_WORKAROUND
331 config FSL_ERRATUM_A008585
332 bool "Workaround for Freescale/NXP Erratum A-008585"
334 depends on ARM_ARCH_TIMER && ARM64
335 select ARM_ARCH_TIMER_OOL_WORKAROUND
337 This option enables a workaround for Freescale/NXP Erratum
338 A-008585 ("ARM generic timer may contain an erroneous
339 value"). The workaround will only be active if the
340 fsl,erratum-a008585 property is found in the timer node.
342 config HISILICON_ERRATUM_161010101
343 bool "Workaround for Hisilicon Erratum 161010101"
345 select ARM_ARCH_TIMER_OOL_WORKAROUND
346 depends on ARM_ARCH_TIMER && ARM64
348 This option enables a workaround for Hisilicon Erratum
349 161010101. The workaround will be active if the hisilicon,erratum-161010101
350 property is found in the timer node.
352 config ARM64_ERRATUM_858921
353 bool "Workaround for Cortex-A73 erratum 858921"
355 select ARM_ARCH_TIMER_OOL_WORKAROUND
356 depends on ARM_ARCH_TIMER && ARM64
358 This option enables a workaround applicable to Cortex-A73
359 (all versions), whose counter may return incorrect values.
360 The workaround will be dynamically enabled when an affected
363 config ARM_GLOBAL_TIMER
364 bool "Support for the ARM global timer" if COMPILE_TEST
365 select CLKSRC_OF if OF
368 This options enables support for the ARM global timer unit
370 config ARM_TIMER_SP804
371 bool "Support for Dual Timer SP804 module"
372 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
374 select CLKSRC_OF if OF
376 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
378 depends on ARM_GLOBAL_TIMER
381 Use ARM global timer clock source as sched_clock
383 config ARMV7M_SYSTICK
384 bool "Support for the ARMv7M system time" if COMPILE_TEST
385 select CLKSRC_OF if OF
388 This options enables support for the ARMv7M system timer unit
391 select CLKSRC_OF if OF
392 def_bool SOC_AT91SAM9 || SOC_SAMA5
395 bool "Atmel ST timer support" if COMPILE_TEST
396 depends on GENERIC_CLOCKEVENTS
400 Support for the Atmel ST timer.
402 config CLKSRC_METAG_GENERIC
405 This option enables support for the Meta per-thread timers.
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
415 depends on GENERIC_CLOCKEVENTS
418 This is a new clocksource driver for the PWM timer found in
419 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
420 for all devicetree enabled platforms. This driver will be
421 needed only on systems that do not have the Exynos MCT available.
424 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
425 depends on GENERIC_CLOCKEVENTS
429 Support for Freescale FlexTimer Module (FTM) timer.
435 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
437 config OXNAS_RPS_TIMER
438 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
439 depends on GENERIC_CLOCKEVENTS
443 This enables support for the Oxford Semiconductor OXNAS RPS timers.
445 config SYS_SUPPORTS_SH_CMT
449 bool "Mediatek timer driver" if COMPILE_TEST
450 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
454 Support for Mediatek timer driver.
456 config SYS_SUPPORTS_SH_MTU2
459 config SYS_SUPPORTS_SH_TMU
462 config SYS_SUPPORTS_EM_STI
465 config CLKSRC_JCORE_PIT
466 bool "J-Core PIT timer driver" if COMPILE_TEST
468 depends on GENERIC_CLOCKEVENTS
472 This enables build of clocksource and clockevent driver for
473 the integrated PIT in the J-Core synthesizable, open source SoC.
476 bool "Renesas CMT timer driver" if COMPILE_TEST
477 depends on GENERIC_CLOCKEVENTS
479 default SYS_SUPPORTS_SH_CMT
481 This enables build of a clocksource and clockevent driver for
482 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
483 variants on a wide range of Mobile and Automotive SoCs from Renesas.
486 bool "Renesas MTU2 timer driver" if COMPILE_TEST
487 depends on GENERIC_CLOCKEVENTS
489 default SYS_SUPPORTS_SH_MTU2
491 This enables build of a clockevent driver for the Multi-Function
492 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
493 This hardware comes with 16 bit-timer registers.
496 bool "Renesas TMU timer driver" if COMPILE_TEST
497 depends on GENERIC_CLOCKEVENTS
499 default SYS_SUPPORTS_SH_TMU
501 This enables build of a clocksource and clockevent driver for
502 the 32-bit Timer Unit (TMU) hardware available on a wide range
506 bool "Renesas STI timer driver" if COMPILE_TEST
507 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
508 default SYS_SUPPORTS_EM_STI
510 This enables build of a clocksource and clockevent driver for
511 the 48-bit System Timer (STI) hardware available on a SoCs
512 such as EMEV2 from former NEC Electronics.
515 bool "Qualcomm MSM timer" if COMPILE_TEST
519 This enables the clocksource and the per CPU clockevent driver for the
522 config CLKSRC_VERSATILE
523 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
524 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
526 default y if MFD_VEXPRESS_SYSREG
528 This option enables clock source based on free running
529 counter available in the "System Registers" block of
530 ARM Versatile, RealView and Versatile Express reference
533 config CLKSRC_MIPS_GIC
538 config CLKSRC_TANGO_XTAL
539 bool "Clocksource for Tango SoC" if COMPILE_TEST
544 This enables the clocksource for Tango SoC
547 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
548 depends on GENERIC_CLOCKEVENTS
552 This enables OST0 support available on PXA and SA-11x0
556 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
557 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
559 This enables the 8 bits timer for the H8300 platform.
562 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
563 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
565 This enables the 16 bits timer for the H8300 platform with the
569 bool "Clocksource for the H8300 platform" if COMPILE_TEST
570 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
572 This enables the clocksource for the H8300 platform with the
575 config CLKSRC_IMX_GPT
576 bool "Clocksource using i.MX GPT" if COMPILE_TEST
577 depends on ARM && CLKDEV_LOOKUP
581 bool "Low power clocksource found in the LPC" if COMPILE_TEST
582 select CLKSRC_OF if OF
586 Enable this option to use the Low Power controller timer