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 CLKSRC_LPC32XX
115 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
116 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
119 config ARM_ARCH_TIMER
121 select CLKSRC_OF if OF
123 config ARM_ARCH_TIMER_EVTSTREAM
124 bool "Support for ARM architected timer event stream generation"
125 default y if ARM_ARCH_TIMER
126 depends on ARM_ARCH_TIMER
128 This option enables support for event stream generation based on
129 the ARM architected timer. It is used for waking up CPUs executing
130 the wfe instruction at a frequency represented as a power-of-2
131 divisor of the clock rate.
132 The main use of the event stream is wfe-based timeouts of userspace
133 locking implementations. It might also be useful for imposing timeout
134 on wfe to safeguard against any programming errors in case an expected
135 event is not generated.
136 This must be disabled for hardware validation purposes to detect any
137 hardware anomalies of missing events.
139 config ARM_GLOBAL_TIMER
141 select CLKSRC_OF if OF
143 This options enables support for the ARM global timer unit
145 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
147 depends on ARM_GLOBAL_TIMER
150 Use ARM global timer clock source as sched_clock
152 config ARMV7M_SYSTICK
154 select CLKSRC_OF if OF
157 This options enables support for the ARMv7M system timer unit
160 select CLKSRC_OF if OF
161 def_bool SOC_AT91SAM9 || SOC_SAMA5
168 config CLKSRC_METAG_GENERIC
171 This option enables support for the Meta per-thread timers.
173 config CLKSRC_EXYNOS_MCT
174 def_bool y if ARCH_EXYNOS
177 Support for Multi Core Timer controller on Exynos SoCs.
179 config CLKSRC_SAMSUNG_PWM
182 This is a new clocksource driver for the PWM timer found in
183 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
184 for all devicetree enabled platforms. This driver will be
185 needed only on systems that do not have the Exynos MCT available.
190 Support for Freescale FlexTimer Module (FTM) timer.
195 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
197 config SYS_SUPPORTS_SH_CMT
205 config SYS_SUPPORTS_SH_MTU2
208 config SYS_SUPPORTS_SH_TMU
211 config SYS_SUPPORTS_EM_STI
215 bool "Renesas CMT timer driver" if COMPILE_TEST
216 depends on GENERIC_CLOCKEVENTS
218 default SYS_SUPPORTS_SH_CMT
220 This enables build of a clocksource and clockevent driver for
221 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
222 variants on a wide range of Mobile and Automotive SoCs from Renesas.
225 bool "Renesas MTU2 timer driver" if COMPILE_TEST
226 depends on GENERIC_CLOCKEVENTS
228 default SYS_SUPPORTS_SH_MTU2
230 This enables build of a clockevent driver for the Multi-Function
231 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
232 This hardware comes with 16 bit-timer registers.
235 bool "Renesas TMU timer driver" if COMPILE_TEST
236 depends on GENERIC_CLOCKEVENTS
238 default SYS_SUPPORTS_SH_TMU
240 This enables build of a clocksource and clockevent driver for
241 the 32-bit Timer Unit (TMU) hardware available on a wide range
245 bool "Renesas STI timer driver" if COMPILE_TEST
246 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
247 default SYS_SUPPORTS_EM_STI
249 This enables build of a clocksource and clockevent driver for
250 the 48-bit System Timer (STI) hardware available on a SoCs
251 such as EMEV2 from former NEC Electronics.
256 config CLKSRC_VERSATILE
257 bool "ARM Versatile (Express) reference platforms clock source"
258 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
260 default y if MFD_VEXPRESS_SYSREG
262 This option enables clock source based on free running
263 counter available in the "System Registers" block of
264 ARM Versatile, RealView and Versatile Express reference
267 config CLKSRC_MIPS_GIC
273 def_bool y if ARCH_PXA || ARCH_SA1100
274 select CLKSRC_OF if USE_OF
276 This enables OST0 support available on PXA and SA-11x0
285 config CLKSRC_IMX_GPT
286 bool "Clocksource using i.MX GPT" if COMPILE_TEST
287 depends on ARM && CLKDEV_LOOKUP