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
66 config CLKSRC_NOMADIK_MTU
68 depends on (ARCH_NOMADIK || ARCH_U8500)
71 Support for Multi Timer Unit. MTU provides access
72 to multiple interrupt generating programmable
73 32-bit free running decrementing counters.
75 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
77 depends on CLKSRC_NOMADIK_MTU
79 Use the Multi Timer Unit as the sched_clock.
81 config CLKSRC_DBX500_PRCMU
82 bool "Clocksource PRCMU Timer"
83 depends on UX500_SOC_DB8500
86 Use the always on PRCMU Timer as clocksource
88 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
89 bool "Clocksource PRCMU Timer sched_clock"
90 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
93 Use the always on PRCMU Timer as sched_clock
96 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
97 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
101 Support to use the timers of EFM32 SoCs as clock source and clock
104 config ARM_ARCH_TIMER
106 select CLKSRC_OF if OF
108 config ARM_ARCH_TIMER_EVTSTREAM
109 bool "Support for ARM architected timer event stream generation"
110 default y if ARM_ARCH_TIMER
111 depends on ARM_ARCH_TIMER
113 This option enables support for event stream generation based on
114 the ARM architected timer. It is used for waking up CPUs executing
115 the wfe instruction at a frequency represented as a power-of-2
116 divisor of the clock rate.
117 The main use of the event stream is wfe-based timeouts of userspace
118 locking implementations. It might also be useful for imposing timeout
119 on wfe to safeguard against any programming errors in case an expected
120 event is not generated.
121 This must be disabled for hardware validation purposes to detect any
122 hardware anomalies of missing events.
124 config ARM_GLOBAL_TIMER
126 select CLKSRC_OF if OF
128 This options enables support for the ARM global timer unit
130 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
132 depends on ARM_GLOBAL_TIMER
135 Use ARM global timer clock source as sched_clock
138 select CLKSRC_OF if OF
139 def_bool SOC_AT91SAM9 || SOC_SAMA5
141 config CLKSRC_METAG_GENERIC
144 This option enables support for the Meta per-thread timers.
146 config CLKSRC_EXYNOS_MCT
147 def_bool y if ARCH_EXYNOS
150 Support for Multi Core Timer controller on Exynos SoCs.
152 config CLKSRC_SAMSUNG_PWM
155 This is a new clocksource driver for the PWM timer found in
156 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
157 for all devicetree enabled platforms. This driver will be
158 needed only on systems that do not have the Exynos MCT available.
163 Support for Freescale FlexTimer Module (FTM) timer.
168 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
170 config SYS_SUPPORTS_SH_CMT
178 config SYS_SUPPORTS_SH_MTU2
181 config SYS_SUPPORTS_SH_TMU
184 config SYS_SUPPORTS_EM_STI
188 bool "Renesas CMT timer driver" if COMPILE_TEST
189 depends on GENERIC_CLOCKEVENTS
190 default SYS_SUPPORTS_SH_CMT
192 This enables build of a clocksource and clockevent driver for
193 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
194 variants on a wide range of Mobile and Automotive SoCs from Renesas.
197 bool "Renesas MTU2 timer driver" if COMPILE_TEST
198 depends on GENERIC_CLOCKEVENTS
199 default SYS_SUPPORTS_SH_MTU2
201 This enables build of a clockevent driver for the Multi-Function
202 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
203 This hardware comes with 16 bit-timer registers.
206 bool "Renesas TMU timer driver" if COMPILE_TEST
207 depends on GENERIC_CLOCKEVENTS
208 default SYS_SUPPORTS_SH_TMU
210 This enables build of a clocksource and clockevent driver for
211 the 32-bit Timer Unit (TMU) hardware available on a wide range
215 bool "Renesas STI timer driver" if COMPILE_TEST
216 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
217 default SYS_SUPPORTS_EM_STI
219 This enables build of a clocksource and clockevent driver for
220 the 48-bit System Timer (STI) hardware available on a SoCs
221 such as EMEV2 from former NEC Electronics.
226 config CLKSRC_VERSATILE
227 bool "ARM Versatile (Express) reference platforms clock source"
228 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
230 default y if MFD_VEXPRESS_SYSREG
232 This option enables clock source based on free running
233 counter available in the "System Registers" block of
234 ARM Versatile, RealView and Versatile Express reference
237 config CLKSRC_MIPS_GIC
243 def_bool y if ARCH_PXA || ARCH_SA1100
244 select CLKSRC_OF if USE_OF
246 This enables OST0 support available on PXA and SA-11x0
250 bool "Alphascale ASM9260 timer driver"
251 depends on GENERIC_CLOCKEVENTS
254 default y if MACH_ASM9260
256 This enables build of a clocksource and clockevent driver for
257 the 32-bit System Timer hardware available on a Alphascale ASM9260.