1 menu "Clock Source drivers"
2 depends on !ARCH_USES_GETTIMEOFFSET
32 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
38 bool "BCM2835 timer driver" if COMPILE_TEST
39 depends on GENERIC_CLOCKEVENTS
42 Enables the support for the BCM2835 timer driver.
45 bool "BCM mobile timer driver" if COMPILE_TEST
46 depends on GENERIC_CLOCKEVENTS
49 Enables the support for the BCM Kona mobile timer driver.
51 config DIGICOLOR_TIMER
52 bool "Digicolor timer driver" if COMPILE_TEST
53 depends on GENERIC_CLOCKEVENTS
57 Enables the support for the digicolor timer driver.
60 bool "DW APB timer driver" if COMPILE_TEST
61 depends on GENERIC_CLOCKEVENTS
63 Enables the support for the dw_apb timer.
65 config DW_APB_TIMER_OF
71 bool "Rockchip timer driver" if COMPILE_TEST
72 depends on ARM || ARM64
75 Enables the support for the rockchip timer driver.
77 config ARMADA_370_XP_TIMER
78 bool "Armada 370 and XP timer driver" if COMPILE_TEST
83 Enables the support for the Armada 370 and XP timer driver.
86 bool "Meson6 timer driver" if COMPILE_TEST
87 depends on GENERIC_CLOCKEVENTS
90 Enables the support for the Meson6 timer driver.
93 bool "Orion timer driver" if COMPILE_TEST
98 Enables the support for the Orion timer driver
101 bool "Sun4i timer driver" if COMPILE_TEST
102 depends on GENERIC_CLOCKEVENTS
106 Enables support for the Sun4i timer.
109 bool "Sun5i timer driver" if COMPILE_TEST
111 depends on COMMON_CLK
113 Enables support the Sun5i timer.
116 bool "Tegra timer driver" if COMPILE_TEST
120 Enables support for the Tegra driver.
123 bool "VT8500 timer driver" if COMPILE_TEST
124 depends on GENERIC_CLOCKEVENTS
127 Enables support for the VT8500 driver.
129 config CADENCE_TTC_TIMER
130 bool "Cadence TTC timer driver" if COMPILE_TEST
131 depends on COMMON_CLK
133 Enables support for the cadence ttc driver.
136 bool "ASM9260 timer driver" if COMPILE_TEST
137 depends on GENERIC_CLOCKEVENTS
141 Enables support for the ASM9260 timer.
143 config CLKSRC_NOMADIK_MTU
144 bool "Nomakdik clocksource driver" if COMPILE_TEST
148 Support for Multi Timer Unit. MTU provides access
149 to multiple interrupt generating programmable
150 32-bit free running decrementing counters.
152 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
154 depends on CLKSRC_NOMADIK_MTU
156 Use the Multi Timer Unit as the sched_clock.
158 config CLKSRC_DBX500_PRCMU
159 bool "Clocksource PRCMU Timer" if COMPILE_TEST
160 depends on GENERIC_CLOCKEVENTS
163 Use the always on PRCMU Timer as clocksource
165 config CLPS711X_TIMER
166 bool "Cirrus logic timer driver" if COMPILE_TEST
167 depends on GENERIC_CLOCKEVENTS
170 Enables support for the Cirrus Logic PS711 timer.
173 bool "Atlas7 timer driver" if COMPILE_TEST
174 depends on GENERIC_CLOCKEVENTS
177 Enables support for the Atlas7 timer.
180 bool "Moxart timer driver" if COMPILE_TEST
181 depends on GENERIC_CLOCKEVENTS
184 Enables support for the Moxart timer.
187 bool "Mxs timer driver" if COMPILE_TEST
188 depends on GENERIC_CLOCKEVENTS
192 Enables support for the Mxs timer.
195 bool "Prima2 timer driver" if COMPILE_TEST
196 depends on GENERIC_CLOCKEVENTS
199 Enables support for the Prima2 timer.
202 bool "U300 timer driver" if COMPILE_TEST
203 depends on GENERIC_CLOCKEVENTS
207 Enables support for the U300 timer.
210 bool "NSpire timer driver" if COMPILE_TEST
211 depends on GENERIC_CLOCKEVENTS
214 Enables support for the Nspire timer.
216 config KEYSTONE_TIMER
217 bool "Keystone timer driver" if COMPILE_TEST
218 depends on GENERIC_CLOCKEVENTS
219 depends on ARM || ARM64
222 Enables support for the Keystone timer.
224 config INTEGRATOR_AP_TIMER
225 bool "Integrator-ap timer driver" if COMPILE_TEST
226 depends on GENERIC_CLOCKEVENTS
229 Enables support for the Integrator-ap timer.
231 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
232 bool "Clocksource PRCMU Timer sched_clock"
233 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
236 Use the always on PRCMU Timer as sched_clock
239 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
240 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
244 Support to use the timers of EFM32 SoCs as clock source and clock
247 config CLKSRC_LPC32XX
248 bool "Clocksource for LPC32XX" if COMPILE_TEST
249 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
254 Support for the LPC32XX clocksource.
256 config CLKSRC_PISTACHIO
257 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
261 Enables the clocksource for the Pistachio SoC.
264 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
265 depends on GENERIC_SCHED_CLOCK
266 select CLKSRC_OF if OF
268 This option enables support for Texas Instruments 32.768 Hz clocksource
269 available on many OMAP-like platforms.
272 bool "NPS400 clocksource driver" if COMPILE_TEST
273 depends on !PHYS_ADDR_T_64BIT
275 select CLKSRC_OF if OF
277 NPS400 clocksource support.
278 Got 64 bit counter with update rate up to 1000MHz.
279 This counter is accessed via couple of 32 bit memory mapped registers.
282 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
283 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
287 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
288 depends on GENERIC_SCHED_CLOCK
293 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
294 depends on GENERIC_CLOCKEVENTS
297 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
298 (ARC700 as well as ARC HS38).
299 TIMER0 serves as clockevent while TIMER1 provides clocksource
301 config ARC_TIMERS_64BIT
302 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
303 depends on GENERIC_CLOCKEVENTS
304 depends on ARC_TIMERS
307 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
308 RTC is implemented inside the core, while GFRC sits outside the core in
309 ARConnect IP block. Driver automatically picks one of them for clocksource
312 config ARM_ARCH_TIMER
314 select CLKSRC_OF if OF
315 select CLKSRC_ACPI if ACPI
317 config ARM_ARCH_TIMER_EVTSTREAM
318 bool "Enable ARM architected timer event stream generation by default"
319 default y if ARM_ARCH_TIMER
320 depends on ARM_ARCH_TIMER
322 This option enables support by default for event stream generation
323 based on the ARM architected timer. It is used for waking up CPUs
324 executing the wfe instruction at a frequency represented as a
325 power-of-2 divisor of the clock rate. The behaviour can also be
326 overridden on the command line using the
327 clocksource.arm_arch_timer.evtstream parameter.
328 The main use of the event stream is wfe-based timeouts of userspace
329 locking implementations. It might also be useful for imposing timeout
330 on wfe to safeguard against any programming errors in case an expected
331 event is not generated.
332 This must be disabled for hardware validation purposes to detect any
333 hardware anomalies of missing events.
335 config FSL_ERRATUM_A008585
336 bool "Workaround for Freescale/NXP Erratum A-008585"
338 depends on ARM_ARCH_TIMER && ARM64
340 This option enables a workaround for Freescale/NXP Erratum
341 A-008585 ("ARM generic timer may contain an erroneous
342 value"). The workaround will only be active if the
343 fsl,erratum-a008585 property is found in the timer node.
345 config ARM_GLOBAL_TIMER
346 bool "Support for the ARM global timer" if COMPILE_TEST
347 select CLKSRC_OF if OF
350 This options enables support for the ARM global timer unit
352 config ARM_TIMER_SP804
353 bool "Support for Dual Timer SP804 module"
354 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
356 select CLKSRC_OF if OF
358 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
360 depends on ARM_GLOBAL_TIMER
363 Use ARM global timer clock source as sched_clock
365 config ARMV7M_SYSTICK
366 bool "Support for the ARMv7M system time" if COMPILE_TEST
367 select CLKSRC_OF if OF
370 This options enables support for the ARMv7M system timer unit
373 select CLKSRC_OF if OF
374 def_bool SOC_AT91SAM9 || SOC_SAMA5
377 bool "Atmel ST timer support" if COMPILE_TEST
378 depends on GENERIC_CLOCKEVENTS
382 Support for the Atmel ST timer.
384 config CLKSRC_METAG_GENERIC
387 This option enables support for the Meta per-thread timers.
389 config CLKSRC_EXYNOS_MCT
390 bool "Exynos multi core timer driver" if COMPILE_TEST
391 depends on ARM || ARM64
393 Support for Multi Core Timer controller on Exynos SoCs.
395 config CLKSRC_SAMSUNG_PWM
396 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
397 depends on GENERIC_CLOCKEVENTS
400 This is a new clocksource driver for the PWM timer found in
401 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
402 for all devicetree enabled platforms. This driver will be
403 needed only on systems that do not have the Exynos MCT available.
406 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
407 depends on GENERIC_CLOCKEVENTS
411 Support for Freescale FlexTimer Module (FTM) timer.
417 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
419 config OXNAS_RPS_TIMER
420 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
421 depends on GENERIC_CLOCKEVENTS
425 This enables support for the Oxford Semiconductor OXNAS RPS timers.
427 config SYS_SUPPORTS_SH_CMT
431 bool "Mediatek timer driver" if COMPILE_TEST
432 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
436 Support for Mediatek timer driver.
438 config SYS_SUPPORTS_SH_MTU2
441 config SYS_SUPPORTS_SH_TMU
444 config SYS_SUPPORTS_EM_STI
447 config CLKSRC_JCORE_PIT
448 bool "J-Core PIT timer driver" if COMPILE_TEST
450 depends on GENERIC_CLOCKEVENTS
454 This enables build of clocksource and clockevent driver for
455 the integrated PIT in the J-Core synthesizable, open source SoC.
458 bool "Renesas CMT timer driver" if COMPILE_TEST
459 depends on GENERIC_CLOCKEVENTS
461 default SYS_SUPPORTS_SH_CMT
463 This enables build of a clocksource and clockevent driver for
464 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
465 variants on a wide range of Mobile and Automotive SoCs from Renesas.
468 bool "Renesas MTU2 timer driver" if COMPILE_TEST
469 depends on GENERIC_CLOCKEVENTS
471 default SYS_SUPPORTS_SH_MTU2
473 This enables build of a clockevent driver for the Multi-Function
474 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
475 This hardware comes with 16 bit-timer registers.
478 bool "Renesas TMU timer driver" if COMPILE_TEST
479 depends on GENERIC_CLOCKEVENTS
481 default SYS_SUPPORTS_SH_TMU
483 This enables build of a clocksource and clockevent driver for
484 the 32-bit Timer Unit (TMU) hardware available on a wide range
488 bool "Renesas STI timer driver" if COMPILE_TEST
489 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
490 default SYS_SUPPORTS_EM_STI
492 This enables build of a clocksource and clockevent driver for
493 the 48-bit System Timer (STI) hardware available on a SoCs
494 such as EMEV2 from former NEC Electronics.
497 bool "Qualcomm MSM timer" if COMPILE_TEST
501 This enables the clocksource and the per CPU clockevent driver for the
504 config CLKSRC_VERSATILE
505 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
506 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
508 default y if MFD_VEXPRESS_SYSREG
510 This option enables clock source based on free running
511 counter available in the "System Registers" block of
512 ARM Versatile, RealView and Versatile Express reference
515 config CLKSRC_MIPS_GIC
520 config CLKSRC_TANGO_XTAL
521 bool "Clocksource for Tango SoC" if COMPILE_TEST
526 This enables the clocksource for Tango SoC
529 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
530 depends on GENERIC_CLOCKEVENTS
534 This enables OST0 support available on PXA and SA-11x0
538 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
539 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
541 This enables the 8 bits timer for the H8300 platform.
544 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
545 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
547 This enables the 16 bits timer for the H8300 platform with the
551 bool "Clocksource for the H8300 platform" if COMPILE_TEST
552 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
554 This enables the clocksource for the H8300 platform with the
557 config CLKSRC_IMX_GPT
558 bool "Clocksource using i.MX GPT" if COMPILE_TEST
559 depends on ARM && CLKDEV_LOOKUP
563 bool "Low power clocksource found in the LPC" if COMPILE_TEST
564 select CLKSRC_OF if OF
568 Enable this option to use the Low Power controller timer