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 ARM_TIMER_SP804
146 bool "Support for Dual Timer SP804 module"
147 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
149 select CLKSRC_OF if OF
151 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
153 depends on ARM_GLOBAL_TIMER
156 Use ARM global timer clock source as sched_clock
158 config ARMV7M_SYSTICK
160 select CLKSRC_OF if OF
163 This options enables support for the ARMv7M system timer unit
166 select CLKSRC_OF if OF
167 def_bool SOC_AT91SAM9 || SOC_SAMA5
174 config CLKSRC_METAG_GENERIC
177 This option enables support for the Meta per-thread timers.
179 config CLKSRC_EXYNOS_MCT
180 def_bool y if ARCH_EXYNOS
183 Support for Multi Core Timer controller on Exynos SoCs.
185 config CLKSRC_SAMSUNG_PWM
188 This is a new clocksource driver for the PWM timer found in
189 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
190 for all devicetree enabled platforms. This driver will be
191 needed only on systems that do not have the Exynos MCT available.
196 Support for Freescale FlexTimer Module (FTM) timer.
201 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
203 config SYS_SUPPORTS_SH_CMT
211 config SYS_SUPPORTS_SH_MTU2
214 config SYS_SUPPORTS_SH_TMU
217 config SYS_SUPPORTS_EM_STI
221 bool "Renesas CMT timer driver" if COMPILE_TEST
222 depends on GENERIC_CLOCKEVENTS
224 default SYS_SUPPORTS_SH_CMT
226 This enables build of a clocksource and clockevent driver for
227 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
228 variants on a wide range of Mobile and Automotive SoCs from Renesas.
231 bool "Renesas MTU2 timer driver" if COMPILE_TEST
232 depends on GENERIC_CLOCKEVENTS
234 default SYS_SUPPORTS_SH_MTU2
236 This enables build of a clockevent driver for the Multi-Function
237 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
238 This hardware comes with 16 bit-timer registers.
241 bool "Renesas TMU timer driver" if COMPILE_TEST
242 depends on GENERIC_CLOCKEVENTS
244 default SYS_SUPPORTS_SH_TMU
246 This enables build of a clocksource and clockevent driver for
247 the 32-bit Timer Unit (TMU) hardware available on a wide range
251 bool "Renesas STI timer driver" if COMPILE_TEST
252 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
253 default SYS_SUPPORTS_EM_STI
255 This enables build of a clocksource and clockevent driver for
256 the 48-bit System Timer (STI) hardware available on a SoCs
257 such as EMEV2 from former NEC Electronics.
262 config CLKSRC_VERSATILE
263 bool "ARM Versatile (Express) reference platforms clock source"
264 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
266 default y if MFD_VEXPRESS_SYSREG
268 This option enables clock source based on free running
269 counter available in the "System Registers" block of
270 ARM Versatile, RealView and Versatile Express reference
273 config CLKSRC_MIPS_GIC
279 def_bool y if ARCH_PXA || ARCH_SA1100
280 select CLKSRC_OF if USE_OF
282 This enables OST0 support available on PXA and SA-11x0
291 config CLKSRC_IMX_GPT
292 bool "Clocksource using i.MX GPT" if COMPILE_TEST
293 depends on ARM && CLKDEV_LOOKUP