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 depends on GENERIC_SCHED_CLOCK
121 select CLKSRC_OF if OF
123 This option enables support for Texas Instruments 32.768 Hz clocksource
124 available on many OMAP-like platforms.
127 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
128 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
131 config ARM_ARCH_TIMER
133 select CLKSRC_OF if OF
135 config ARM_ARCH_TIMER_EVTSTREAM
136 bool "Support for ARM architected timer event stream generation"
137 default y if ARM_ARCH_TIMER
138 depends on ARM_ARCH_TIMER
140 This option enables support for event stream generation based on
141 the ARM architected timer. It is used for waking up CPUs executing
142 the wfe instruction at a frequency represented as a power-of-2
143 divisor of the clock rate.
144 The main use of the event stream is wfe-based timeouts of userspace
145 locking implementations. It might also be useful for imposing timeout
146 on wfe to safeguard against any programming errors in case an expected
147 event is not generated.
148 This must be disabled for hardware validation purposes to detect any
149 hardware anomalies of missing events.
151 config ARM_GLOBAL_TIMER
153 select CLKSRC_OF if OF
155 This options enables support for the ARM global timer unit
157 config ARM_TIMER_SP804
158 bool "Support for Dual Timer SP804 module"
159 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
161 select CLKSRC_OF if OF
163 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
165 depends on ARM_GLOBAL_TIMER
168 Use ARM global timer clock source as sched_clock
170 config ARMV7M_SYSTICK
172 select CLKSRC_OF if OF
175 This options enables support for the ARMv7M system timer unit
178 select CLKSRC_OF if OF
179 def_bool SOC_AT91SAM9 || SOC_SAMA5
186 config CLKSRC_METAG_GENERIC
189 This option enables support for the Meta per-thread timers.
191 config CLKSRC_EXYNOS_MCT
192 def_bool y if ARCH_EXYNOS
195 Support for Multi Core Timer controller on Exynos SoCs.
197 config CLKSRC_SAMSUNG_PWM
200 This is a new clocksource driver for the PWM timer found in
201 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
202 for all devicetree enabled platforms. This driver will be
203 needed only on systems that do not have the Exynos MCT available.
208 Support for Freescale FlexTimer Module (FTM) timer.
213 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
215 config SYS_SUPPORTS_SH_CMT
223 config SYS_SUPPORTS_SH_MTU2
226 config SYS_SUPPORTS_SH_TMU
229 config SYS_SUPPORTS_EM_STI
233 bool "Renesas CMT timer driver" if COMPILE_TEST
234 depends on GENERIC_CLOCKEVENTS
236 default SYS_SUPPORTS_SH_CMT
238 This enables build of a clocksource and clockevent driver for
239 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
240 variants on a wide range of Mobile and Automotive SoCs from Renesas.
243 bool "Renesas MTU2 timer driver" if COMPILE_TEST
244 depends on GENERIC_CLOCKEVENTS
246 default SYS_SUPPORTS_SH_MTU2
248 This enables build of a clockevent driver for the Multi-Function
249 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
250 This hardware comes with 16 bit-timer registers.
253 bool "Renesas TMU timer driver" if COMPILE_TEST
254 depends on GENERIC_CLOCKEVENTS
256 default SYS_SUPPORTS_SH_TMU
258 This enables build of a clocksource and clockevent driver for
259 the 32-bit Timer Unit (TMU) hardware available on a wide range
263 bool "Renesas STI timer driver" if COMPILE_TEST
264 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
265 default SYS_SUPPORTS_EM_STI
267 This enables build of a clocksource and clockevent driver for
268 the 48-bit System Timer (STI) hardware available on a SoCs
269 such as EMEV2 from former NEC Electronics.
274 config CLKSRC_VERSATILE
275 bool "ARM Versatile (Express) reference platforms clock source"
276 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
278 default y if MFD_VEXPRESS_SYSREG
280 This option enables clock source based on free running
281 counter available in the "System Registers" block of
282 ARM Versatile, RealView and Versatile Express reference
285 config CLKSRC_MIPS_GIC
290 config CLKSRC_TANGO_XTAL
295 def_bool y if ARCH_PXA || ARCH_SA1100
296 select CLKSRC_OF if OF
298 This enables OST0 support available on PXA and SA-11x0
307 config CLKSRC_IMX_GPT
308 bool "Clocksource using i.MX GPT" if COMPILE_TEST
309 depends on ARM && CLKDEV_LOOKUP
315 select CLKSRC_OF if OF
317 Enable this option to use the Low Power controller timer