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 "Clocksource for STM32 SoCs" if !ARCH_STM32
128 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
131 config ARM_ARCH_TIMER
133 select CLKSRC_OF if OF
134 select CLKSRC_ACPI if ACPI
136 config ARM_ARCH_TIMER_EVTSTREAM
137 bool "Support for ARM architected timer event stream generation"
138 default y if ARM_ARCH_TIMER
139 depends on ARM_ARCH_TIMER
141 This option enables support for event stream generation based on
142 the ARM architected timer. It is used for waking up CPUs executing
143 the wfe instruction at a frequency represented as a power-of-2
144 divisor of the clock rate.
145 The main use of the event stream is wfe-based timeouts of userspace
146 locking implementations. It might also be useful for imposing timeout
147 on wfe to safeguard against any programming errors in case an expected
148 event is not generated.
149 This must be disabled for hardware validation purposes to detect any
150 hardware anomalies of missing events.
152 config ARM_GLOBAL_TIMER
154 select CLKSRC_OF if OF
156 This options enables support for the ARM global timer unit
158 config ARM_TIMER_SP804
159 bool "Support for Dual Timer SP804 module"
160 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
162 select CLKSRC_OF if OF
164 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
166 depends on ARM_GLOBAL_TIMER
169 Use ARM global timer clock source as sched_clock
171 config ARMV7M_SYSTICK
173 select CLKSRC_OF if OF
176 This options enables support for the ARMv7M system timer unit
179 select CLKSRC_OF if OF
180 def_bool SOC_AT91SAM9 || SOC_SAMA5
187 config CLKSRC_METAG_GENERIC
190 This option enables support for the Meta per-thread timers.
192 config CLKSRC_EXYNOS_MCT
193 def_bool y if ARCH_EXYNOS
196 Support for Multi Core Timer controller on Exynos SoCs.
198 config CLKSRC_SAMSUNG_PWM
201 This is a new clocksource driver for the PWM timer found in
202 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
203 for all devicetree enabled platforms. This driver will be
204 needed only on systems that do not have the Exynos MCT available.
209 Support for Freescale FlexTimer Module (FTM) timer.
214 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
216 config SYS_SUPPORTS_SH_CMT
224 config SYS_SUPPORTS_SH_MTU2
227 config SYS_SUPPORTS_SH_TMU
230 config SYS_SUPPORTS_EM_STI
234 bool "Renesas CMT timer driver" if COMPILE_TEST
235 depends on GENERIC_CLOCKEVENTS
237 default SYS_SUPPORTS_SH_CMT
239 This enables build of a clocksource and clockevent driver for
240 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
241 variants on a wide range of Mobile and Automotive SoCs from Renesas.
244 bool "Renesas MTU2 timer driver" if COMPILE_TEST
245 depends on GENERIC_CLOCKEVENTS
247 default SYS_SUPPORTS_SH_MTU2
249 This enables build of a clockevent driver for the Multi-Function
250 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
251 This hardware comes with 16 bit-timer registers.
254 bool "Renesas TMU timer driver" if COMPILE_TEST
255 depends on GENERIC_CLOCKEVENTS
257 default SYS_SUPPORTS_SH_TMU
259 This enables build of a clocksource and clockevent driver for
260 the 32-bit Timer Unit (TMU) hardware available on a wide range
264 bool "Renesas STI timer driver" if COMPILE_TEST
265 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
266 default SYS_SUPPORTS_EM_STI
268 This enables build of a clocksource and clockevent driver for
269 the 48-bit System Timer (STI) hardware available on a SoCs
270 such as EMEV2 from former NEC Electronics.
275 config CLKSRC_VERSATILE
276 bool "ARM Versatile (Express) reference platforms clock source"
277 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
279 default y if MFD_VEXPRESS_SYSREG
281 This option enables clock source based on free running
282 counter available in the "System Registers" block of
283 ARM Versatile, RealView and Versatile Express reference
286 config CLKSRC_MIPS_GIC
291 config CLKSRC_TANGO_XTAL
296 def_bool y if ARCH_PXA || ARCH_SA1100
297 select CLKSRC_OF if OF
299 This enables OST0 support available on PXA and SA-11x0
308 config CLKSRC_IMX_GPT
309 bool "Clocksource using i.MX GPT" if COMPILE_TEST
310 depends on ARM && CLKDEV_LOOKUP
316 select CLKSRC_OF if OF
318 Enable this option to use the Low Power controller timer