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 "Clocksource for STM32 SoCs" if !ARCH_STM32
120 depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
123 config ARM_ARCH_TIMER
125 select CLKSRC_OF if OF
127 config ARM_ARCH_TIMER_EVTSTREAM
128 bool "Support for ARM architected timer event stream generation"
129 default y if ARM_ARCH_TIMER
130 depends on ARM_ARCH_TIMER
132 This option enables support for event stream generation based on
133 the ARM architected timer. It is used for waking up CPUs executing
134 the wfe instruction at a frequency represented as a power-of-2
135 divisor of the clock rate.
136 The main use of the event stream is wfe-based timeouts of userspace
137 locking implementations. It might also be useful for imposing timeout
138 on wfe to safeguard against any programming errors in case an expected
139 event is not generated.
140 This must be disabled for hardware validation purposes to detect any
141 hardware anomalies of missing events.
143 config ARM_GLOBAL_TIMER
145 select CLKSRC_OF if OF
147 This options enables support for the ARM global timer unit
149 config ARM_TIMER_SP804
150 bool "Support for Dual Timer SP804 module"
151 depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
153 select CLKSRC_OF if OF
155 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
157 depends on ARM_GLOBAL_TIMER
160 Use ARM global timer clock source as sched_clock
162 config ARMV7M_SYSTICK
164 select CLKSRC_OF if OF
167 This options enables support for the ARMv7M system timer unit
170 select CLKSRC_OF if OF
171 def_bool SOC_AT91SAM9 || SOC_SAMA5
178 config CLKSRC_METAG_GENERIC
181 This option enables support for the Meta per-thread timers.
183 config CLKSRC_EXYNOS_MCT
184 def_bool y if ARCH_EXYNOS
187 Support for Multi Core Timer controller on Exynos SoCs.
189 config CLKSRC_SAMSUNG_PWM
192 This is a new clocksource driver for the PWM timer found in
193 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
194 for all devicetree enabled platforms. This driver will be
195 needed only on systems that do not have the Exynos MCT available.
200 Support for Freescale FlexTimer Module (FTM) timer.
205 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
207 config SYS_SUPPORTS_SH_CMT
215 config SYS_SUPPORTS_SH_MTU2
218 config SYS_SUPPORTS_SH_TMU
221 config SYS_SUPPORTS_EM_STI
225 bool "Renesas CMT timer driver" if COMPILE_TEST
226 depends on GENERIC_CLOCKEVENTS
228 default SYS_SUPPORTS_SH_CMT
230 This enables build of a clocksource and clockevent driver for
231 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
232 variants on a wide range of Mobile and Automotive SoCs from Renesas.
235 bool "Renesas MTU2 timer driver" if COMPILE_TEST
236 depends on GENERIC_CLOCKEVENTS
238 default SYS_SUPPORTS_SH_MTU2
240 This enables build of a clockevent driver for the Multi-Function
241 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
242 This hardware comes with 16 bit-timer registers.
245 bool "Renesas TMU timer driver" if COMPILE_TEST
246 depends on GENERIC_CLOCKEVENTS
248 default SYS_SUPPORTS_SH_TMU
250 This enables build of a clocksource and clockevent driver for
251 the 32-bit Timer Unit (TMU) hardware available on a wide range
255 bool "Renesas STI timer driver" if COMPILE_TEST
256 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
257 default SYS_SUPPORTS_EM_STI
259 This enables build of a clocksource and clockevent driver for
260 the 48-bit System Timer (STI) hardware available on a SoCs
261 such as EMEV2 from former NEC Electronics.
266 config CLKSRC_VERSATILE
267 bool "ARM Versatile (Express) reference platforms clock source"
268 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
270 default y if MFD_VEXPRESS_SYSREG
272 This option enables clock source based on free running
273 counter available in the "System Registers" block of
274 ARM Versatile, RealView and Versatile Express reference
277 config CLKSRC_MIPS_GIC
283 def_bool y if ARCH_PXA || ARCH_SA1100
284 select CLKSRC_OF if OF
286 This enables OST0 support available on PXA and SA-11x0
295 config CLKSRC_IMX_GPT
296 bool "Clocksource using i.MX GPT" if COMPILE_TEST
297 depends on ARM && CLKDEV_LOOKUP
303 select CLKSRC_OF if OF
305 Enable this option to use the Low Power controller timer