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
60 config CADENCE_TTC_TIMER
63 config CLKSRC_NOMADIK_MTU
65 depends on (ARCH_NOMADIK || ARCH_U8500)
68 Support for Multi Timer Unit. MTU provides access
69 to multiple interrupt generating programmable
70 32-bit free running decrementing counters.
72 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
74 depends on CLKSRC_NOMADIK_MTU
76 Use the Multi Timer Unit as the sched_clock.
78 config CLKSRC_DBX500_PRCMU
79 bool "Clocksource PRCMU Timer"
80 depends on UX500_SOC_DB8500
83 Use the always on PRCMU Timer as clocksource
85 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
86 bool "Clocksource PRCMU Timer sched_clock"
87 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
90 Use the always on PRCMU Timer as sched_clock
93 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
94 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
98 Support to use the timers of EFM32 SoCs as clock source and clock
101 config ARM_ARCH_TIMER
103 select CLKSRC_OF if OF
105 config ARM_ARCH_TIMER_EVTSTREAM
106 bool "Support for ARM architected timer event stream generation"
107 default y if ARM_ARCH_TIMER
108 depends on ARM_ARCH_TIMER
110 This option enables support for event stream generation based on
111 the ARM architected timer. It is used for waking up CPUs executing
112 the wfe instruction at a frequency represented as a power-of-2
113 divisor of the clock rate.
114 The main use of the event stream is wfe-based timeouts of userspace
115 locking implementations. It might also be useful for imposing timeout
116 on wfe to safeguard against any programming errors in case an expected
117 event is not generated.
118 This must be disabled for hardware validation purposes to detect any
119 hardware anomalies of missing events.
121 config ARM_GLOBAL_TIMER
123 select CLKSRC_OF if OF
125 This options enables support for the ARM global timer unit
127 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
129 depends on ARM_GLOBAL_TIMER
132 Use ARM global timer clock source as sched_clock
135 select CLKSRC_OF if OF
136 def_bool SOC_AT91SAM9 || SOC_SAMA5
138 config CLKSRC_METAG_GENERIC
141 This option enables support for the Meta per-thread timers.
143 config CLKSRC_EXYNOS_MCT
144 def_bool y if ARCH_EXYNOS
147 Support for Multi Core Timer controller on Exynos SoCs.
149 config CLKSRC_SAMSUNG_PWM
152 This is a new clocksource driver for the PWM timer found in
153 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
154 for all devicetree enabled platforms. This driver will be
155 needed only on systems that do not have the Exynos MCT available.
160 Support for Freescale FlexTimer Module (FTM) timer.
165 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
167 config SYS_SUPPORTS_SH_CMT
175 config SYS_SUPPORTS_SH_MTU2
178 config SYS_SUPPORTS_SH_TMU
181 config SYS_SUPPORTS_EM_STI
185 bool "Renesas CMT timer driver" if COMPILE_TEST
186 depends on GENERIC_CLOCKEVENTS
187 default SYS_SUPPORTS_SH_CMT
189 This enables build of a clocksource and clockevent driver for
190 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
191 variants on a wide range of Mobile and Automotive SoCs from Renesas.
194 bool "Renesas MTU2 timer driver" if COMPILE_TEST
195 depends on GENERIC_CLOCKEVENTS
196 default SYS_SUPPORTS_SH_MTU2
198 This enables build of a clockevent driver for the Multi-Function
199 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
200 This hardware comes with 16 bit-timer registers.
203 bool "Renesas TMU timer driver" if COMPILE_TEST
204 depends on GENERIC_CLOCKEVENTS
205 default SYS_SUPPORTS_SH_TMU
207 This enables build of a clocksource and clockevent driver for
208 the 32-bit Timer Unit (TMU) hardware available on a wide range
212 bool "Renesas STI timer driver" if COMPILE_TEST
213 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
214 default SYS_SUPPORTS_EM_STI
216 This enables build of a clocksource and clockevent driver for
217 the 48-bit System Timer (STI) hardware available on a SoCs
218 such as EMEV2 from former NEC Electronics.
223 config CLKSRC_VERSATILE
224 bool "ARM Versatile (Express) reference platforms clock source"
225 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
227 default y if MFD_VEXPRESS_SYSREG
229 This option enables clock source based on free running
230 counter available in the "System Registers" block of
231 ARM Versatile, RealView and Versatile Express reference
234 config CLKSRC_MIPS_GIC
240 def_bool y if ARCH_PXA || ARCH_SA1100
241 select CLKSRC_OF if USE_OF
243 This enables OST0 support available on PXA and SA-11x0
247 bool "Alphascale ASM9260 timer driver"
248 depends on GENERIC_CLOCKEVENTS
251 default y if MACH_ASM9260
253 This enables build of a clocksource and clockevent driver for
254 the 32-bit System Timer hardware available on a Alphascale ASM9260.