1 menu "Clock Source drivers"
24 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
29 config DIGICOLOR_TIMER
35 config DW_APB_TIMER_OF
44 config ARMADA_370_XP_TIMER
71 config CADENCE_TTC_TIMER
79 config CLKSRC_NOMADIK_MTU
81 depends on (ARCH_NOMADIK || ARCH_U8500)
84 Support for Multi Timer Unit. MTU provides access
85 to multiple interrupt generating programmable
86 32-bit free running decrementing counters.
88 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
90 depends on CLKSRC_NOMADIK_MTU
92 Use the Multi Timer Unit as the sched_clock.
94 config CLKSRC_DBX500_PRCMU
95 bool "Clocksource PRCMU Timer"
96 depends on UX500_SOC_DB8500
99 Use the always on PRCMU Timer as clocksource
101 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
102 bool "Clocksource PRCMU Timer sched_clock"
103 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
106 Use the always on PRCMU Timer as sched_clock
109 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
110 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
114 Support to use the timers of EFM32 SoCs as clock source and clock
117 config CLKSRC_LPC32XX
122 config CLKSRC_PISTACHIO
127 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
128 depends on GENERIC_SCHED_CLOCK
129 select CLKSRC_OF if OF
131 This option enables support for Texas Instruments 32.768 Hz clocksource
132 available on many OMAP-like platforms.
135 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
136 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
139 config ARM_ARCH_TIMER
141 select CLKSRC_OF if OF
142 select CLKSRC_ACPI if ACPI
144 config ARM_ARCH_TIMER_EVTSTREAM
145 bool "Support for ARM architected timer event stream generation"
146 default y if ARM_ARCH_TIMER
147 depends on ARM_ARCH_TIMER
149 This option enables support for event stream generation based on
150 the ARM architected timer. It is used for waking up CPUs executing
151 the wfe instruction at a frequency represented as a power-of-2
152 divisor of the clock rate.
153 The main use of the event stream is wfe-based timeouts of userspace
154 locking implementations. It might also be useful for imposing timeout
155 on wfe to safeguard against any programming errors in case an expected
156 event is not generated.
157 This must be disabled for hardware validation purposes to detect any
158 hardware anomalies of missing events.
160 config ARM_GLOBAL_TIMER
162 select CLKSRC_OF if OF
164 This options enables support for the ARM global timer unit
166 config ARM_TIMER_SP804
167 bool "Support for Dual Timer SP804 module"
168 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
170 select CLKSRC_OF if OF
172 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
174 depends on ARM_GLOBAL_TIMER
177 Use ARM global timer clock source as sched_clock
179 config ARMV7M_SYSTICK
181 select CLKSRC_OF if OF
184 This options enables support for the ARMv7M system timer unit
187 select CLKSRC_OF if OF
188 def_bool SOC_AT91SAM9 || SOC_SAMA5
195 config CLKSRC_METAG_GENERIC
198 This option enables support for the Meta per-thread timers.
200 config CLKSRC_EXYNOS_MCT
201 def_bool y if ARCH_EXYNOS
204 Support for Multi Core Timer controller on Exynos SoCs.
206 config CLKSRC_SAMSUNG_PWM
209 This is a new clocksource driver for the PWM timer found in
210 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
211 for all devicetree enabled platforms. This driver will be
212 needed only on systems that do not have the Exynos MCT available.
217 Support for Freescale FlexTimer Module (FTM) timer.
222 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
224 config SYS_SUPPORTS_SH_CMT
232 config SYS_SUPPORTS_SH_MTU2
235 config SYS_SUPPORTS_SH_TMU
238 config SYS_SUPPORTS_EM_STI
242 bool "Renesas CMT timer driver" if COMPILE_TEST
243 depends on GENERIC_CLOCKEVENTS
245 default SYS_SUPPORTS_SH_CMT
247 This enables build of a clocksource and clockevent driver for
248 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
249 variants on a wide range of Mobile and Automotive SoCs from Renesas.
252 bool "Renesas MTU2 timer driver" if COMPILE_TEST
253 depends on GENERIC_CLOCKEVENTS
255 default SYS_SUPPORTS_SH_MTU2
257 This enables build of a clockevent driver for the Multi-Function
258 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
259 This hardware comes with 16 bit-timer registers.
262 bool "Renesas TMU timer driver" if COMPILE_TEST
263 depends on GENERIC_CLOCKEVENTS
265 default SYS_SUPPORTS_SH_TMU
267 This enables build of a clocksource and clockevent driver for
268 the 32-bit Timer Unit (TMU) hardware available on a wide range
272 bool "Renesas STI timer driver" if COMPILE_TEST
273 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
274 default SYS_SUPPORTS_EM_STI
276 This enables build of a clocksource and clockevent driver for
277 the 48-bit System Timer (STI) hardware available on a SoCs
278 such as EMEV2 from former NEC Electronics.
283 config CLKSRC_VERSATILE
284 bool "ARM Versatile (Express) reference platforms clock source"
285 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
287 default y if MFD_VEXPRESS_SYSREG
289 This option enables clock source based on free running
290 counter available in the "System Registers" block of
291 ARM Versatile, RealView and Versatile Express reference
294 config CLKSRC_MIPS_GIC
299 config CLKSRC_TANGO_XTAL
304 def_bool y if ARCH_PXA || ARCH_SA1100
305 select CLKSRC_OF if OF
307 This enables OST0 support available on PXA and SA-11x0
316 config CLKSRC_IMX_GPT
317 bool "Clocksource using i.MX GPT" if COMPILE_TEST
318 depends on ARM && CLKDEV_LOOKUP
324 select CLKSRC_OF if OF
326 Enable this option to use the Low Power controller timer