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 "RDA timer driver" if COMPILE_TEST
110 depends on GENERIC_CLOCKEVENTS
114 Enables the support for the RDA Micro timer driver.
117 bool "Sun4i timer driver" if COMPILE_TEST
122 Enables support for the Sun4i timer.
125 bool "Sun5i timer driver" if COMPILE_TEST
127 depends on COMMON_CLK
129 Enables support the Sun5i timer.
132 bool "Tegra timer driver" if COMPILE_TEST
135 depends on ARM || ARM64
137 Enables support for the Tegra driver.
140 bool "VT8500 timer driver" if COMPILE_TEST
143 Enables support for the VT8500 driver.
146 bool "NPCM7xx timer driver" if COMPILE_TEST
151 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
152 While TIMER0 serves as clockevent and TIMER1 serves as clocksource.
154 config CADENCE_TTC_TIMER
155 bool "Cadence TTC timer driver" if COMPILE_TEST
156 depends on COMMON_CLK
158 Enables support for the cadence ttc driver.
161 bool "ASM9260 timer driver" if COMPILE_TEST
165 Enables support for the ASM9260 timer.
167 config CLKSRC_NOMADIK_MTU
168 bool "Nomakdik clocksource driver" if COMPILE_TEST
172 Support for Multi Timer Unit. MTU provides access
173 to multiple interrupt generating programmable
174 32-bit free running decrementing counters.
176 config CLKSRC_DBX500_PRCMU
177 bool "Clocksource PRCMU Timer" if COMPILE_TEST
180 Use the always on PRCMU Timer as clocksource
182 config CLPS711X_TIMER
183 bool "Cirrus logic timer driver" if COMPILE_TEST
186 Enables support for the Cirrus Logic PS711 timer.
189 bool "Atlas7 timer driver" if COMPILE_TEST
192 Enables support for the Atlas7 timer.
195 bool "Mxs timer driver" if COMPILE_TEST
199 Enables support for the Mxs timer.
202 bool "Prima2 timer driver" if COMPILE_TEST
205 Enables support for the Prima2 timer.
208 bool "U300 timer driver" if COMPILE_TEST
212 Enables support for the U300 timer.
215 bool "NSpire timer driver" if COMPILE_TEST
218 Enables support for the Nspire timer.
220 config KEYSTONE_TIMER
221 bool "Keystone timer driver" if COMPILE_TEST
222 depends on ARM || ARM64
225 Enables support for the Keystone timer.
227 config INTEGRATOR_AP_TIMER
228 bool "Integrator-ap timer driver" if COMPILE_TEST
231 Enables support for the Integrator-ap timer.
234 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
235 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
239 Support to use the timers of EFM32 SoCs as clock source and clock
242 config CLKSRC_LPC32XX
243 bool "Clocksource for LPC32XX" if COMPILE_TEST
249 Support for the LPC32XX clocksource.
251 config CLKSRC_PISTACHIO
252 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
256 Enables the clocksource for the Pistachio SoC.
259 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
260 depends on GENERIC_SCHED_CLOCK
261 select TIMER_OF if OF
263 This option enables support for Texas Instruments 32.768 Hz clocksource
264 available on many OMAP-like platforms.
267 bool "NPS400 clocksource driver" if COMPILE_TEST
268 depends on !PHYS_ADDR_T_64BIT
270 select TIMER_OF if OF
272 NPS400 clocksource support.
273 Got 64 bit counter with update rate up to 1000MHz.
274 This counter is accessed via couple of 32 bit memory mapped registers.
277 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
278 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
283 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
284 depends on GENERIC_SCHED_CLOCK
289 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
290 depends on GENERIC_SCHED_CLOCK
293 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
294 (ARC700 as well as ARC HS38).
295 TIMER0 serves as clockevent while TIMER1 provides clocksource
297 config ARC_TIMERS_64BIT
298 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
299 depends on ARC_TIMERS
302 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
303 RTC is implemented inside the core, while GFRC sits outside the core in
304 ARConnect IP block. Driver automatically picks one of them for clocksource
307 config ARM_ARCH_TIMER
309 select TIMER_OF if OF
310 select TIMER_ACPI if ACPI
312 config ARM_ARCH_TIMER_EVTSTREAM
313 bool "Enable ARM architected timer event stream generation by default"
314 default y if ARM_ARCH_TIMER
315 depends on ARM_ARCH_TIMER
317 This option enables support by default for event stream generation
318 based on the ARM architected timer. It is used for waking up CPUs
319 executing the wfe instruction at a frequency represented as a
320 power-of-2 divisor of the clock rate. The behaviour can also be
321 overridden on the command line using the
322 clocksource.arm_arch_timer.evtstream parameter.
323 The main use of the event stream is wfe-based timeouts of userspace
324 locking implementations. It might also be useful for imposing timeout
325 on wfe to safeguard against any programming errors in case an expected
326 event is not generated.
327 This must be disabled for hardware validation purposes to detect any
328 hardware anomalies of missing events.
330 config ARM_ARCH_TIMER_OOL_WORKAROUND
333 config FSL_ERRATUM_A008585
334 bool "Workaround for Freescale/NXP Erratum A-008585"
336 depends on ARM_ARCH_TIMER && ARM64
337 select ARM_ARCH_TIMER_OOL_WORKAROUND
339 This option enables a workaround for Freescale/NXP Erratum
340 A-008585 ("ARM generic timer may contain an erroneous
341 value"). The workaround will only be active if the
342 fsl,erratum-a008585 property is found in the timer node.
344 config HISILICON_ERRATUM_161010101
345 bool "Workaround for Hisilicon Erratum 161010101"
347 select ARM_ARCH_TIMER_OOL_WORKAROUND
348 depends on ARM_ARCH_TIMER && ARM64
350 This option enables a workaround for Hisilicon Erratum
351 161010101. The workaround will be active if the hisilicon,erratum-161010101
352 property is found in the timer node.
354 config ARM64_ERRATUM_858921
355 bool "Workaround for Cortex-A73 erratum 858921"
357 select ARM_ARCH_TIMER_OOL_WORKAROUND
358 depends on ARM_ARCH_TIMER && ARM64
360 This option enables a workaround applicable to Cortex-A73
361 (all versions), whose counter may return incorrect values.
362 The workaround will be dynamically enabled when an affected
365 config SUN50I_ERRATUM_UNKNOWN1
366 bool "Workaround for Allwinner A64 erratum UNKNOWN1"
368 depends on ARM_ARCH_TIMER && ARM64 && ARCH_SUNXI
369 select ARM_ARCH_TIMER_OOL_WORKAROUND
371 This option enables a workaround for instability in the timer on
372 the Allwinner A64 SoC. The workaround will only be active if the
373 allwinner,erratum-unknown1 property is found in the timer node.
375 config ARM_GLOBAL_TIMER
376 bool "Support for the ARM global timer" if COMPILE_TEST
377 select TIMER_OF if OF
380 This options enables support for the ARM global timer unit
382 config ARM_TIMER_SP804
383 bool "Support for Dual Timer SP804 module"
384 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
386 select TIMER_OF if OF
388 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
390 depends on ARM_GLOBAL_TIMER
393 Use ARM global timer clock source as sched_clock
395 config ARMV7M_SYSTICK
396 bool "Support for the ARMv7M system time" if COMPILE_TEST
397 select TIMER_OF if OF
400 This options enables support for the ARMv7M system timer unit
403 select TIMER_OF if OF
404 def_bool SOC_AT91SAM9 || SOC_SAMA5
407 bool "Atmel ST timer support" if COMPILE_TEST
412 Support for the Atmel ST timer.
414 config CLKSRC_EXYNOS_MCT
415 bool "Exynos multi core timer driver" if COMPILE_TEST
416 depends on ARM || ARM64
418 Support for Multi Core Timer controller on Exynos SoCs.
420 config CLKSRC_SAMSUNG_PWM
421 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
424 This is a new clocksource driver for the PWM timer found in
425 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
426 for all devicetree enabled platforms. This driver will be
427 needed only on systems that do not have the Exynos MCT available.
430 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
434 Support for Freescale FlexTimer Module (FTM) timer.
440 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
442 config OXNAS_RPS_TIMER
443 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
447 This enables support for the Oxford Semiconductor OXNAS RPS timers.
449 config SYS_SUPPORTS_SH_CMT
453 bool "Mediatek timer driver" if COMPILE_TEST
458 Support for Mediatek timer driver.
461 bool "Spreadtrum timer driver" if EXPERT
463 depends on (ARCH_SPRD || COMPILE_TEST)
467 Enables support for the Spreadtrum timer driver.
469 config SYS_SUPPORTS_SH_MTU2
472 config SYS_SUPPORTS_SH_TMU
475 config SYS_SUPPORTS_EM_STI
478 config CLKSRC_JCORE_PIT
479 bool "J-Core PIT timer driver" if COMPILE_TEST
484 This enables build of clocksource and clockevent driver for
485 the integrated PIT in the J-Core synthesizable, open source SoC.
488 bool "Renesas CMT timer driver" if COMPILE_TEST
490 default SYS_SUPPORTS_SH_CMT
492 This enables build of a clocksource and clockevent driver for
493 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
494 variants on a wide range of Mobile and Automotive SoCs from Renesas.
497 bool "Renesas MTU2 timer driver" if COMPILE_TEST
499 default SYS_SUPPORTS_SH_MTU2
501 This enables build of a clockevent driver for the Multi-Function
502 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
503 This hardware comes with 16 bit-timer registers.
506 bool "Renesas OSTM timer driver" if COMPILE_TEST
509 Enables the support for the Renesas OSTM.
512 bool "Renesas TMU timer driver" if COMPILE_TEST
514 default SYS_SUPPORTS_SH_TMU
516 This enables build of a clocksource and clockevent driver for
517 the 32-bit Timer Unit (TMU) hardware available on a wide range
521 bool "Renesas STI timer driver" if COMPILE_TEST
523 default SYS_SUPPORTS_EM_STI
525 This enables build of a clocksource and clockevent driver for
526 the 48-bit System Timer (STI) hardware available on a SoCs
527 such as EMEV2 from former NEC Electronics.
530 bool "Qualcomm MSM timer" if COMPILE_TEST
534 This enables the clocksource and the per CPU clockevent driver for the
537 config CLKSRC_VERSATILE
538 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
539 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
541 default y if MFD_VEXPRESS_SYSREG
543 This option enables clock source based on free running
544 counter available in the "System Registers" block of
545 ARM Versatile, RealView and Versatile Express reference
548 config CLKSRC_MIPS_GIC
553 config CLKSRC_TANGO_XTAL
554 bool "Clocksource for Tango SoC" if COMPILE_TEST
559 This enables the clocksource for Tango SoC
562 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
566 This enables OST0 support available on PXA and SA-11x0
570 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
573 This enables the 8 bits timer for the H8300 platform.
576 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
579 This enables the 16 bits timer for the H8300 platform with the
583 bool "Clocksource for the H8300 platform" if COMPILE_TEST
586 This enables the clocksource for the H8300 platform with the
589 config CLKSRC_IMX_GPT
590 bool "Clocksource using i.MX GPT" if COMPILE_TEST
591 depends on (ARM || ARM64) && CLKDEV_LOOKUP
594 config CLKSRC_IMX_TPM
595 bool "Clocksource using i.MX TPM" if COMPILE_TEST
596 depends on ARM && CLKDEV_LOOKUP
599 Enable this option to use IMX Timer/PWM Module (TPM) timer as
603 bool "Low power clocksource found in the LPC" if COMPILE_TEST
604 select TIMER_OF if OF
608 Enable this option to use the Low Power controller timer
611 config ATCPIT100_TIMER
612 bool "ATCPIT100 timer driver"
613 depends on NDS32 || COMPILE_TEST
618 This option enables support for the Andestech ATCPIT100 timers.
621 bool "Timer for the RISC-V platform"
622 depends on GENERIC_SCHED_CLOCK && RISCV
627 This enables the per-hart timer built into all RISC-V systems, which
628 is accessed via both the SBI and the rdcycle instruction. This is
629 required for all RISC-V systems.
632 bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
636 Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP
638 csky,mptimer is not only used in SMP system, it also could be used
639 single core system. It's not a mmio reg and it use mtcr/mfcr instruction.
642 bool "Gx6605s SOC system timer driver" if COMPILE_TEST
647 This option enables support for gx6605s SOC's timer.
649 config MILBEAUT_TIMER
650 bool "Milbeaut timer driver" if COMPILE_TEST
656 Enables the support for Milbeaut timer driver.