14 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
22 config DW_APB_TIMER_OF
27 config ARMADA_370_XP_TIMER
47 config CADENCE_TTC_TIMER
50 config CLKSRC_NOMADIK_MTU
52 depends on (ARCH_NOMADIK || ARCH_U8500)
55 Support for Multi Timer Unit. MTU provides access
56 to multiple interrupt generating programmable
57 32-bit free running decrementing counters.
59 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
61 depends on CLKSRC_NOMADIK_MTU
63 Use the Multi Timer Unit as the sched_clock.
65 config CLKSRC_DBX500_PRCMU
66 bool "Clocksource PRCMU Timer"
67 depends on UX500_SOC_DB8500
70 Use the always on PRCMU Timer as clocksource
72 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
73 bool "Clocksource PRCMU Timer sched_clock"
74 depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
77 Use the always on PRCMU Timer as sched_clock
80 bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
81 depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
85 Support to use the timers of EFM32 SoCs as clock source and clock
90 select CLKSRC_OF if OF
92 config ARM_ARCH_TIMER_EVTSTREAM
93 bool "Support for ARM architected timer event stream generation"
94 default y if ARM_ARCH_TIMER
95 depends on ARM_ARCH_TIMER
97 This option enables support for event stream generation based on
98 the ARM architected timer. It is used for waking up CPUs executing
99 the wfe instruction at a frequency represented as a power-of-2
100 divisor of the clock rate.
101 The main use of the event stream is wfe-based timeouts of userspace
102 locking implementations. It might also be useful for imposing timeout
103 on wfe to safeguard against any programming errors in case an expected
104 event is not generated.
105 This must be disabled for hardware validation purposes to detect any
106 hardware anomalies of missing events.
108 config ARM_GLOBAL_TIMER
110 select CLKSRC_OF if OF
112 This options enables support for the ARM global timer unit
114 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
116 depends on ARM_GLOBAL_TIMER
119 Use ARM global timer clock source as sched_clock
121 config CLKSRC_METAG_GENERIC
124 This option enables support for the Meta per-thread timers.
126 config CLKSRC_EXYNOS_MCT
127 def_bool y if ARCH_EXYNOS
129 Support for Multi Core Timer controller on Exynos SoCs.
131 config CLKSRC_SAMSUNG_PWM
134 This is a new clocksource driver for the PWM timer found in
135 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
136 for all devicetree enabled platforms. This driver will be
137 needed only on systems that do not have the Exynos MCT available.
142 Support for Freescale FlexTimer Module (FTM) timer.
147 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
149 config SYS_SUPPORTS_SH_CMT
152 config SYS_SUPPORTS_SH_MTU2
155 config SYS_SUPPORTS_SH_TMU
158 config SYS_SUPPORTS_EM_STI
162 bool "Renesas CMT timer driver" if COMPILE_TEST
163 depends on GENERIC_CLOCKEVENTS
164 default SYS_SUPPORTS_SH_CMT
166 This enables build of a clocksource and clockevent driver for
167 the Compare Match Timer (CMT) hardware available in 16/32/48-bit
168 variants on a wide range of Mobile and Automotive SoCs from Renesas.
171 bool "Renesas MTU2 timer driver" if COMPILE_TEST
172 depends on GENERIC_CLOCKEVENTS
173 default SYS_SUPPORTS_SH_MTU2
175 This enables build of a clockevent driver for the Multi-Function
176 Timer Pulse Unit 2 (TMU2) hardware available on SoCs from Renesas.
177 This hardware comes with 16 bit-timer registers.
180 bool "Renesas TMU timer driver" if COMPILE_TEST
181 depends on GENERIC_CLOCKEVENTS
182 default SYS_SUPPORTS_SH_TMU
184 This enables build of a clocksource and clockevent driver for
185 the 32-bit Timer Unit (TMU) hardware available on a wide range
189 bool "Renesas STI timer driver" if COMPILE_TEST
190 depends on GENERIC_CLOCKEVENTS
191 default SYS_SUPPORTS_EM_STI
193 This enables build of a clocksource and clockevent driver for
194 the 48-bit System Timer (STI) hardware available on a SoCs
195 such as EMEV2 from former NEC Electronics.
200 config CLKSRC_VERSATILE
201 bool "ARM Versatile (Express) reference platforms clock source"
202 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
204 default y if MFD_VEXPRESS_SYSREG
206 This option enables clock source based on free running
207 counter available in the "System Registers" block of
208 ARM Versatile, RealView and Versatile Express reference