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 CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
137 depends on ARM_GLOBAL_TIMER
140 Use ARM global timer clock source as sched_clock
143 select CLKSRC_OF if OF
144 def_bool SOC_AT91SAM9 || SOC_SAMA5
146 config CLKSRC_METAG_GENERIC
149 This option enables support for the Meta per-thread timers.
151 config CLKSRC_EXYNOS_MCT
152 def_bool y if ARCH_EXYNOS
155 Support for Multi Core Timer controller on Exynos SoCs.
157 config CLKSRC_SAMSUNG_PWM
160 This is a new clocksource driver for the PWM timer found in
161 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
162 for all devicetree enabled platforms. This driver will be
163 needed only on systems that do not have the Exynos MCT available.
168 Support for Freescale FlexTimer Module (FTM) timer.
173 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
175 config SYS_SUPPORTS_SH_CMT
183 config SYS_SUPPORTS_SH_MTU2
186 config SYS_SUPPORTS_SH_TMU
189 config SYS_SUPPORTS_EM_STI
193 bool "Renesas CMT timer driver" if COMPILE_TEST
194 depends on GENERIC_CLOCKEVENTS
195 default SYS_SUPPORTS_SH_CMT
197 This enables build of a clocksource and clockevent driver for
198 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
199 variants on a wide range of Mobile and Automotive SoCs from Renesas.
202 bool "Renesas MTU2 timer driver" if COMPILE_TEST
203 depends on GENERIC_CLOCKEVENTS
204 default SYS_SUPPORTS_SH_MTU2
206 This enables build of a clockevent driver for the Multi-Function
207 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
208 This hardware comes with 16 bit-timer registers.
211 bool "Renesas TMU timer driver" if COMPILE_TEST
212 depends on GENERIC_CLOCKEVENTS
213 default SYS_SUPPORTS_SH_TMU
215 This enables build of a clocksource and clockevent driver for
216 the 32-bit Timer Unit (TMU) hardware available on a wide range
220 bool "Renesas STI timer driver" if COMPILE_TEST
221 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
222 default SYS_SUPPORTS_EM_STI
224 This enables build of a clocksource and clockevent driver for
225 the 48-bit System Timer (STI) hardware available on a SoCs
226 such as EMEV2 from former NEC Electronics.
231 config CLKSRC_VERSATILE
232 bool "ARM Versatile (Express) reference platforms clock source"
233 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
235 default y if MFD_VEXPRESS_SYSREG
237 This option enables clock source based on free running
238 counter available in the "System Registers" block of
239 ARM Versatile, RealView and Versatile Express reference
242 config CLKSRC_MIPS_GIC
248 def_bool y if ARCH_PXA || ARCH_SA1100
249 select CLKSRC_OF if USE_OF
251 This enables OST0 support available on PXA and SA-11x0