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.
136 config CADENCE_TTC_TIMER
137 bool "Cadence TTC timer driver" if COMPILE_TEST
138 depends on COMMON_CLK
140 Enables support for the cadence ttc driver.
143 bool "ASM9260 timer driver" if COMPILE_TEST
147 Enables support for the ASM9260 timer.
149 config CLKSRC_NOMADIK_MTU
150 bool "Nomakdik clocksource driver" if COMPILE_TEST
154 Support for Multi Timer Unit. MTU provides access
155 to multiple interrupt generating programmable
156 32-bit free running decrementing counters.
158 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
160 depends on CLKSRC_NOMADIK_MTU
162 Use the Multi Timer Unit as the sched_clock.
164 config CLKSRC_DBX500_PRCMU
165 bool "Clocksource PRCMU Timer" if COMPILE_TEST
168 Use the always on PRCMU Timer as clocksource
170 config CLPS711X_TIMER
171 bool "Cirrus logic timer driver" if COMPILE_TEST
174 Enables support for the Cirrus Logic PS711 timer.
177 bool "Atlas7 timer driver" if COMPILE_TEST
180 Enables support for the Atlas7 timer.
183 bool "Mxs timer driver" if COMPILE_TEST
187 Enables support for the Mxs timer.
190 bool "Prima2 timer driver" if COMPILE_TEST
193 Enables support for the Prima2 timer.
196 bool "U300 timer driver" if COMPILE_TEST
200 Enables support for the U300 timer.
203 bool "NSpire timer driver" if COMPILE_TEST
206 Enables support for the Nspire timer.
208 config KEYSTONE_TIMER
209 bool "Keystone timer driver" if COMPILE_TEST
210 depends on ARM || ARM64
213 Enables support for the Keystone timer.
215 config INTEGRATOR_AP_TIMER
216 bool "Integrator-ap timer driver" if COMPILE_TEST
219 Enables support for the Integrator-ap timer.
221 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
222 bool "Clocksource PRCMU Timer sched_clock"
223 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
226 Use the always on PRCMU Timer as sched_clock
229 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
230 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
234 Support to use the timers of EFM32 SoCs as clock source and clock
237 config CLKSRC_LPC32XX
238 bool "Clocksource for LPC32XX" if COMPILE_TEST
244 Support for the LPC32XX clocksource.
246 config CLKSRC_PISTACHIO
247 bool "Clocksource for Pistachio SoC" if COMPILE_TEST
251 Enables the clocksource for the Pistachio SoC.
254 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
255 depends on GENERIC_SCHED_CLOCK
256 select TIMER_OF if OF
258 This option enables support for Texas Instruments 32.768 Hz clocksource
259 available on many OMAP-like platforms.
262 bool "NPS400 clocksource driver" if COMPILE_TEST
263 depends on !PHYS_ADDR_T_64BIT
265 select TIMER_OF if OF
267 NPS400 clocksource support.
268 Got 64 bit counter with update rate up to 1000MHz.
269 This counter is accessed via couple of 32 bit memory mapped registers.
272 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
273 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
278 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
279 depends on GENERIC_SCHED_CLOCK
284 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
287 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
288 (ARC700 as well as ARC HS38).
289 TIMER0 serves as clockevent while TIMER1 provides clocksource
291 config ARC_TIMERS_64BIT
292 bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
293 depends on ARC_TIMERS
296 This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
297 RTC is implemented inside the core, while GFRC sits outside the core in
298 ARConnect IP block. Driver automatically picks one of them for clocksource
301 config ARM_ARCH_TIMER
303 select TIMER_OF if OF
304 select TIMER_ACPI if ACPI
306 config ARM_ARCH_TIMER_EVTSTREAM
307 bool "Enable ARM architected timer event stream generation by default"
308 default y if ARM_ARCH_TIMER
309 depends on ARM_ARCH_TIMER
311 This option enables support by default for event stream generation
312 based on the ARM architected timer. It is used for waking up CPUs
313 executing the wfe instruction at a frequency represented as a
314 power-of-2 divisor of the clock rate. The behaviour can also be
315 overridden on the command line using the
316 clocksource.arm_arch_timer.evtstream parameter.
317 The main use of the event stream is wfe-based timeouts of userspace
318 locking implementations. It might also be useful for imposing timeout
319 on wfe to safeguard against any programming errors in case an expected
320 event is not generated.
321 This must be disabled for hardware validation purposes to detect any
322 hardware anomalies of missing events.
324 config ARM_ARCH_TIMER_OOL_WORKAROUND
327 config FSL_ERRATUM_A008585
328 bool "Workaround for Freescale/NXP Erratum A-008585"
330 depends on ARM_ARCH_TIMER && ARM64
331 select ARM_ARCH_TIMER_OOL_WORKAROUND
333 This option enables a workaround for Freescale/NXP Erratum
334 A-008585 ("ARM generic timer may contain an erroneous
335 value"). The workaround will only be active if the
336 fsl,erratum-a008585 property is found in the timer node.
338 config HISILICON_ERRATUM_161010101
339 bool "Workaround for Hisilicon Erratum 161010101"
341 select ARM_ARCH_TIMER_OOL_WORKAROUND
342 depends on ARM_ARCH_TIMER && ARM64
344 This option enables a workaround for Hisilicon Erratum
345 161010101. The workaround will be active if the hisilicon,erratum-161010101
346 property is found in the timer node.
348 config ARM64_ERRATUM_858921
349 bool "Workaround for Cortex-A73 erratum 858921"
351 select ARM_ARCH_TIMER_OOL_WORKAROUND
352 depends on ARM_ARCH_TIMER && ARM64
354 This option enables a workaround applicable to Cortex-A73
355 (all versions), whose counter may return incorrect values.
356 The workaround will be dynamically enabled when an affected
359 config ARM_GLOBAL_TIMER
360 bool "Support for the ARM global timer" if COMPILE_TEST
361 select TIMER_OF if OF
364 This options enables support for the ARM global timer unit
366 config ARM_TIMER_SP804
367 bool "Support for Dual Timer SP804 module"
368 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
370 select TIMER_OF if OF
372 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
374 depends on ARM_GLOBAL_TIMER
377 Use ARM global timer clock source as sched_clock
379 config ARMV7M_SYSTICK
380 bool "Support for the ARMv7M system time" if COMPILE_TEST
381 select TIMER_OF if OF
384 This options enables support for the ARMv7M system timer unit
387 select TIMER_OF if OF
388 def_bool SOC_AT91SAM9 || SOC_SAMA5
391 bool "Atmel ST timer support" if COMPILE_TEST
396 Support for the Atmel ST timer.
398 config CLKSRC_EXYNOS_MCT
399 bool "Exynos multi core timer driver" if COMPILE_TEST
400 depends on ARM || ARM64
402 Support for Multi Core Timer controller on Exynos SoCs.
404 config CLKSRC_SAMSUNG_PWM
405 bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
408 This is a new clocksource driver for the PWM timer found in
409 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
410 for all devicetree enabled platforms. This driver will be
411 needed only on systems that do not have the Exynos MCT available.
414 bool "Freescale FlexTimer Module driver" if COMPILE_TEST
418 Support for Freescale FlexTimer Module (FTM) timer.
424 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
426 config OXNAS_RPS_TIMER
427 bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
431 This enables support for the Oxford Semiconductor OXNAS RPS timers.
433 config SYS_SUPPORTS_SH_CMT
437 bool "Mediatek timer driver" if COMPILE_TEST
442 Support for Mediatek timer driver.
445 bool "Spreadtrum timer driver" if COMPILE_TEST
449 Enables support for the Spreadtrum timer driver.
451 config SYS_SUPPORTS_SH_MTU2
454 config SYS_SUPPORTS_SH_TMU
457 config SYS_SUPPORTS_EM_STI
460 config CLKSRC_JCORE_PIT
461 bool "J-Core PIT timer driver" if COMPILE_TEST
466 This enables build of clocksource and clockevent driver for
467 the integrated PIT in the J-Core synthesizable, open source SoC.
470 bool "Renesas CMT timer driver" if COMPILE_TEST
472 default SYS_SUPPORTS_SH_CMT
474 This enables build of a clocksource and clockevent driver for
475 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
476 variants on a wide range of Mobile and Automotive SoCs from Renesas.
479 bool "Renesas MTU2 timer driver" if COMPILE_TEST
481 default SYS_SUPPORTS_SH_MTU2
483 This enables build of a clockevent driver for the Multi-Function
484 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
485 This hardware comes with 16 bit-timer registers.
488 bool "Renesas OSTM timer driver" if COMPILE_TEST
491 Enables the support for the Renesas OSTM.
494 bool "Renesas TMU timer driver" if COMPILE_TEST
496 default SYS_SUPPORTS_SH_TMU
498 This enables build of a clocksource and clockevent driver for
499 the 32-bit Timer Unit (TMU) hardware available on a wide range
503 bool "Renesas STI timer driver" if COMPILE_TEST
505 default SYS_SUPPORTS_EM_STI
507 This enables build of a clocksource and clockevent driver for
508 the 48-bit System Timer (STI) hardware available on a SoCs
509 such as EMEV2 from former NEC Electronics.
512 bool "Qualcomm MSM timer" if COMPILE_TEST
516 This enables the clocksource and the per CPU clockevent driver for the
519 config CLKSRC_VERSATILE
520 bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
521 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
523 default y if MFD_VEXPRESS_SYSREG
525 This option enables clock source based on free running
526 counter available in the "System Registers" block of
527 ARM Versatile, RealView and Versatile Express reference
530 config CLKSRC_MIPS_GIC
535 config CLKSRC_TANGO_XTAL
536 bool "Clocksource for Tango SoC" if COMPILE_TEST
541 This enables the clocksource for Tango SoC
544 bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
548 This enables OST0 support available on PXA and SA-11x0
552 bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
555 This enables the 8 bits timer for the H8300 platform.
558 bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
561 This enables the 16 bits timer for the H8300 platform with the
565 bool "Clocksource for the H8300 platform" if COMPILE_TEST
568 This enables the clocksource for the H8300 platform with the
571 config CLKSRC_IMX_GPT
572 bool "Clocksource using i.MX GPT" if COMPILE_TEST
573 depends on ARM && CLKDEV_LOOKUP
576 config CLKSRC_IMX_TPM
577 bool "Clocksource using i.MX TPM" if COMPILE_TEST
578 depends on ARM && CLKDEV_LOOKUP
581 Enable this option to use IMX Timer/PWM Module (TPM) timer as
585 bool "Low power clocksource found in the LPC" if COMPILE_TEST
586 select TIMER_OF if OF
590 Enable this option to use the Low Power controller timer
593 config ATCPIT100_TIMER
594 bool "ATCPIT100 timer driver"
595 depends on NDS32 || COMPILE_TEST
600 This option enables support for the Andestech ATCPIT100 timers.