1 menu "Clock Source drivers"
16 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
21 config DIGICOLOR_TIMER
27 config DW_APB_TIMER_OF
36 config ARMADA_370_XP_TIMER
63 config CADENCE_TTC_TIMER
71 config CLKSRC_NOMADIK_MTU
73 depends on (ARCH_NOMADIK || ARCH_U8500)
76 Support for Multi Timer Unit. MTU provides access
77 to multiple interrupt generating programmable
78 32-bit free running decrementing counters.
80 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
82 depends on CLKSRC_NOMADIK_MTU
84 Use the Multi Timer Unit as the sched_clock.
86 config CLKSRC_DBX500_PRCMU
87 bool "Clocksource PRCMU Timer"
88 depends on UX500_SOC_DB8500
91 Use the always on PRCMU Timer as clocksource
93 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
94 bool "Clocksource PRCMU Timer sched_clock"
95 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
98 Use the always on PRCMU Timer as sched_clock
101 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
102 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
106 Support to use the timers of EFM32 SoCs as clock source and clock
109 config ARM_ARCH_TIMER
111 select CLKSRC_OF if OF
113 config ARM_ARCH_TIMER_EVTSTREAM
114 bool "Support for ARM architected timer event stream generation"
115 default y if ARM_ARCH_TIMER
116 depends on ARM_ARCH_TIMER
118 This option enables support for event stream generation based on
119 the ARM architected timer. It is used for waking up CPUs executing
120 the wfe instruction at a frequency represented as a power-of-2
121 divisor of the clock rate.
122 The main use of the event stream is wfe-based timeouts of userspace
123 locking implementations. It might also be useful for imposing timeout
124 on wfe to safeguard against any programming errors in case an expected
125 event is not generated.
126 This must be disabled for hardware validation purposes to detect any
127 hardware anomalies of missing events.
129 config ARM_GLOBAL_TIMER
131 select CLKSRC_OF if OF
133 This options enables support for the ARM global timer unit
135 config ARM_TIMER_SP804
136 bool "Support for Dual Timer SP804 module"
137 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
139 select CLKSRC_OF if OF
141 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
143 depends on ARM_GLOBAL_TIMER
146 Use ARM global timer clock source as sched_clock
149 select CLKSRC_OF if OF
150 def_bool SOC_AT91SAM9 || SOC_SAMA5
157 config CLKSRC_METAG_GENERIC
160 This option enables support for the Meta per-thread timers.
162 config CLKSRC_EXYNOS_MCT
163 def_bool y if ARCH_EXYNOS
166 Support for Multi Core Timer controller on Exynos SoCs.
168 config CLKSRC_SAMSUNG_PWM
171 This is a new clocksource driver for the PWM timer found in
172 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
173 for all devicetree enabled platforms. This driver will be
174 needed only on systems that do not have the Exynos MCT available.
179 Support for Freescale FlexTimer Module (FTM) timer.
184 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
186 config SYS_SUPPORTS_SH_CMT
194 config SYS_SUPPORTS_SH_MTU2
197 config SYS_SUPPORTS_SH_TMU
200 config SYS_SUPPORTS_EM_STI
204 bool "Renesas CMT timer driver" if COMPILE_TEST
205 depends on GENERIC_CLOCKEVENTS
207 default SYS_SUPPORTS_SH_CMT
209 This enables build of a clocksource and clockevent driver for
210 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
211 variants on a wide range of Mobile and Automotive SoCs from Renesas.
214 bool "Renesas MTU2 timer driver" if COMPILE_TEST
215 depends on GENERIC_CLOCKEVENTS
217 default SYS_SUPPORTS_SH_MTU2
219 This enables build of a clockevent driver for the Multi-Function
220 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
221 This hardware comes with 16 bit-timer registers.
224 bool "Renesas TMU timer driver" if COMPILE_TEST
225 depends on GENERIC_CLOCKEVENTS
227 default SYS_SUPPORTS_SH_TMU
229 This enables build of a clocksource and clockevent driver for
230 the 32-bit Timer Unit (TMU) hardware available on a wide range
234 bool "Renesas STI timer driver" if COMPILE_TEST
235 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
236 default SYS_SUPPORTS_EM_STI
238 This enables build of a clocksource and clockevent driver for
239 the 48-bit System Timer (STI) hardware available on a SoCs
240 such as EMEV2 from former NEC Electronics.
245 config CLKSRC_VERSATILE
246 bool "ARM Versatile (Express) reference platforms clock source"
247 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
249 default y if MFD_VEXPRESS_SYSREG
251 This option enables clock source based on free running
252 counter available in the "System Registers" block of
253 ARM Versatile, RealView and Versatile Express reference
256 config CLKSRC_MIPS_GIC
262 def_bool y if ARCH_PXA || ARCH_SA1100
263 select CLKSRC_OF if USE_OF
265 This enables OST0 support available on PXA and SA-11x0