1 menu "Clock Source drivers"
2 depends on !ARCH_USES_GETTIMEOFFSET
25 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
30 config DIGICOLOR_TIMER
36 config DW_APB_TIMER_OF
42 bool "Rockchip timer driver" if COMPILE_TEST
43 depends on ARM || ARM64
46 Enables the support for the rockchip timer driver.
48 config ARMADA_370_XP_TIMER
75 config CADENCE_TTC_TIMER
83 config CLKSRC_NOMADIK_MTU
85 depends on (ARCH_NOMADIK || ARCH_U8500)
88 Support for Multi Timer Unit. MTU provides access
89 to multiple interrupt generating programmable
90 32-bit free running decrementing counters.
92 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
94 depends on CLKSRC_NOMADIK_MTU
96 Use the Multi Timer Unit as the sched_clock.
98 config CLKSRC_DBX500_PRCMU
99 bool "Clocksource PRCMU Timer"
100 depends on UX500_SOC_DB8500
103 Use the always on PRCMU Timer as clocksource
105 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
106 bool "Clocksource PRCMU Timer sched_clock"
107 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
110 Use the always on PRCMU Timer as sched_clock
113 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
114 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
118 Support to use the timers of EFM32 SoCs as clock source and clock
121 config CLKSRC_LPC32XX
126 config CLKSRC_PISTACHIO
131 bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
132 depends on GENERIC_SCHED_CLOCK
133 select CLKSRC_OF if OF
135 This option enables support for Texas Instruments 32.768 Hz clocksource
136 available on many OMAP-like platforms.
139 bool "Clocksource for STM32 SoCs" if !ARCH_STM32
140 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
143 config ARM_ARCH_TIMER
145 select CLKSRC_OF if OF
146 select CLKSRC_ACPI if ACPI
148 config ARM_ARCH_TIMER_EVTSTREAM
149 bool "Support for ARM architected timer event stream generation"
150 default y if ARM_ARCH_TIMER
151 depends on ARM_ARCH_TIMER
153 This option enables support for event stream generation based on
154 the ARM architected timer. It is used for waking up CPUs executing
155 the wfe instruction at a frequency represented as a power-of-2
156 divisor of the clock rate.
157 The main use of the event stream is wfe-based timeouts of userspace
158 locking implementations. It might also be useful for imposing timeout
159 on wfe to safeguard against any programming errors in case an expected
160 event is not generated.
161 This must be disabled for hardware validation purposes to detect any
162 hardware anomalies of missing events.
164 config ARM_GLOBAL_TIMER
166 select CLKSRC_OF if OF
168 This options enables support for the ARM global timer unit
170 config ARM_TIMER_SP804
171 bool "Support for Dual Timer SP804 module"
172 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
174 select CLKSRC_OF if OF
176 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
178 depends on ARM_GLOBAL_TIMER
181 Use ARM global timer clock source as sched_clock
183 config ARMV7M_SYSTICK
185 select CLKSRC_OF if OF
188 This options enables support for the ARMv7M system timer unit
191 select CLKSRC_OF if OF
192 def_bool SOC_AT91SAM9 || SOC_SAMA5
199 config CLKSRC_METAG_GENERIC
202 This option enables support for the Meta per-thread timers.
204 config CLKSRC_EXYNOS_MCT
205 def_bool y if ARCH_EXYNOS
208 Support for Multi Core Timer controller on Exynos SoCs.
210 config CLKSRC_SAMSUNG_PWM
213 This is a new clocksource driver for the PWM timer found in
214 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
215 for all devicetree enabled platforms. This driver will be
216 needed only on systems that do not have the Exynos MCT available.
221 Support for Freescale FlexTimer Module (FTM) timer.
226 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
228 config SYS_SUPPORTS_SH_CMT
236 config SYS_SUPPORTS_SH_MTU2
239 config SYS_SUPPORTS_SH_TMU
242 config SYS_SUPPORTS_EM_STI
246 bool "Renesas CMT timer driver" if COMPILE_TEST
247 depends on GENERIC_CLOCKEVENTS
249 default SYS_SUPPORTS_SH_CMT
251 This enables build of a clocksource and clockevent driver for
252 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
253 variants on a wide range of Mobile and Automotive SoCs from Renesas.
256 bool "Renesas MTU2 timer driver" if COMPILE_TEST
257 depends on GENERIC_CLOCKEVENTS
259 default SYS_SUPPORTS_SH_MTU2
261 This enables build of a clockevent driver for the Multi-Function
262 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
263 This hardware comes with 16 bit-timer registers.
266 bool "Renesas TMU timer driver" if COMPILE_TEST
267 depends on GENERIC_CLOCKEVENTS
269 default SYS_SUPPORTS_SH_TMU
271 This enables build of a clocksource and clockevent driver for
272 the 32-bit Timer Unit (TMU) hardware available on a wide range
276 bool "Renesas STI timer driver" if COMPILE_TEST
277 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
278 default SYS_SUPPORTS_EM_STI
280 This enables build of a clocksource and clockevent driver for
281 the 48-bit System Timer (STI) hardware available on a SoCs
282 such as EMEV2 from former NEC Electronics.
287 config CLKSRC_VERSATILE
288 bool "ARM Versatile (Express) reference platforms clock source"
289 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
291 default y if MFD_VEXPRESS_SYSREG
293 This option enables clock source based on free running
294 counter available in the "System Registers" block of
295 ARM Versatile, RealView and Versatile Express reference
298 config CLKSRC_MIPS_GIC
303 config CLKSRC_TANGO_XTAL
308 def_bool y if ARCH_PXA || ARCH_SA1100
309 select CLKSRC_OF if OF
311 This enables OST0 support available on PXA and SA-11x0
320 config CLKSRC_IMX_GPT
321 bool "Clocksource using i.MX GPT" if COMPILE_TEST
322 depends on ARM && CLKDEV_LOOKUP
328 select CLKSRC_OF if OF
330 Enable this option to use the Low Power controller timer