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
114 config CLKSRC_PISTACHIO
119 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
120 select CLKSRC_OF if OF
122 This option enables support for Texas Instruments 32.768 Hz clocksource
123 available on many OMAP-like platforms.
126 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
127 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
130 config ARM_ARCH_TIMER
132 select CLKSRC_OF if OF
134 config ARM_ARCH_TIMER_EVTSTREAM
135 bool "Support for ARM architected timer event stream generation"
136 default y if ARM_ARCH_TIMER
137 depends on ARM_ARCH_TIMER
139 This option enables support for event stream generation based on
140 the ARM architected timer. It is used for waking up CPUs executing
141 the wfe instruction at a frequency represented as a power-of-2
142 divisor of the clock rate.
143 The main use of the event stream is wfe-based timeouts of userspace
144 locking implementations. It might also be useful for imposing timeout
145 on wfe to safeguard against any programming errors in case an expected
146 event is not generated.
147 This must be disabled for hardware validation purposes to detect any
148 hardware anomalies of missing events.
150 config ARM_GLOBAL_TIMER
152 select CLKSRC_OF if OF
154 This options enables support for the ARM global timer unit
156 config ARM_TIMER_SP804
157 bool "Support for Dual Timer SP804 module"
158 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
160 select CLKSRC_OF if OF
162 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
164 depends on ARM_GLOBAL_TIMER
167 Use ARM global timer clock source as sched_clock
169 config ARMV7M_SYSTICK
171 select CLKSRC_OF if OF
174 This options enables support for the ARMv7M system timer unit
177 select CLKSRC_OF if OF
178 def_bool SOC_AT91SAM9 || SOC_SAMA5
185 config CLKSRC_METAG_GENERIC
188 This option enables support for the Meta per-thread timers.
190 config CLKSRC_EXYNOS_MCT
191 def_bool y if ARCH_EXYNOS
194 Support for Multi Core Timer controller on Exynos SoCs.
196 config CLKSRC_SAMSUNG_PWM
199 This is a new clocksource driver for the PWM timer found in
200 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
201 for all devicetree enabled platforms. This driver will be
202 needed only on systems that do not have the Exynos MCT available.
207 Support for Freescale FlexTimer Module (FTM) timer.
212 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
214 config SYS_SUPPORTS_SH_CMT
222 config SYS_SUPPORTS_SH_MTU2
225 config SYS_SUPPORTS_SH_TMU
228 config SYS_SUPPORTS_EM_STI
232 bool "Renesas CMT timer driver" if COMPILE_TEST
233 depends on GENERIC_CLOCKEVENTS
235 default SYS_SUPPORTS_SH_CMT
237 This enables build of a clocksource and clockevent driver for
238 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
239 variants on a wide range of Mobile and Automotive SoCs from Renesas.
242 bool "Renesas MTU2 timer driver" if COMPILE_TEST
243 depends on GENERIC_CLOCKEVENTS
245 default SYS_SUPPORTS_SH_MTU2
247 This enables build of a clockevent driver for the Multi-Function
248 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
249 This hardware comes with 16 bit-timer registers.
252 bool "Renesas TMU timer driver" if COMPILE_TEST
253 depends on GENERIC_CLOCKEVENTS
255 default SYS_SUPPORTS_SH_TMU
257 This enables build of a clocksource and clockevent driver for
258 the 32-bit Timer Unit (TMU) hardware available on a wide range
262 bool "Renesas STI timer driver" if COMPILE_TEST
263 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
264 default SYS_SUPPORTS_EM_STI
266 This enables build of a clocksource and clockevent driver for
267 the 48-bit System Timer (STI) hardware available on a SoCs
268 such as EMEV2 from former NEC Electronics.
273 config CLKSRC_VERSATILE
274 bool "ARM Versatile (Express) reference platforms clock source"
275 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
277 default y if MFD_VEXPRESS_SYSREG
279 This option enables clock source based on free running
280 counter available in the "System Registers" block of
281 ARM Versatile, RealView and Versatile Express reference
284 config CLKSRC_MIPS_GIC
290 def_bool y if ARCH_PXA || ARCH_SA1100
291 select CLKSRC_OF if OF
293 This enables OST0 support available on PXA and SA-11x0
302 config CLKSRC_IMX_GPT
303 bool "Clocksource using i.MX GPT" if COMPILE_TEST
304 depends on ARM && CLKDEV_LOOKUP
310 select CLKSRC_OF if OF
312 Enable this option to use the Low Power controller timer