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Linux/drivers/clocksource/Kconfig

  1 config CLKSRC_OF
  2         bool
  3 
  4 config CLKSRC_I8253
  5         bool
  6 
  7 config CLKEVT_I8253
  8         bool
  9 
 10 config I8253_LOCK
 11         bool
 12 
 13 config CLKBLD_I8253
 14         def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
 15 
 16 config CLKSRC_MMIO
 17         bool
 18 
 19 config DW_APB_TIMER
 20         bool
 21 
 22 config DW_APB_TIMER_OF
 23         bool
 24         select DW_APB_TIMER
 25         select CLKSRC_OF
 26 
 27 config ARMADA_370_XP_TIMER
 28         bool
 29         select CLKSRC_OF
 30 
 31 config ORION_TIMER
 32         select CLKSRC_OF
 33         select CLKSRC_MMIO
 34         bool
 35 
 36 config SUN4I_TIMER
 37         select CLKSRC_MMIO
 38         bool
 39 
 40 config SUN5I_HSTIMER
 41         select CLKSRC_MMIO
 42         bool
 43 
 44 config VT8500_TIMER
 45         bool
 46 
 47 config CADENCE_TTC_TIMER
 48         bool
 49 
 50 config CLKSRC_NOMADIK_MTU
 51         bool
 52         depends on (ARCH_NOMADIK || ARCH_U8500)
 53         select CLKSRC_MMIO
 54         help
 55           Support for Multi Timer Unit. MTU provides access
 56           to multiple interrupt generating programmable
 57           32-bit free running decrementing counters.
 58 
 59 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
 60         bool
 61         depends on CLKSRC_NOMADIK_MTU
 62         help
 63           Use the Multi Timer Unit as the sched_clock.
 64 
 65 config CLKSRC_DBX500_PRCMU
 66         bool "Clocksource PRCMU Timer"
 67         depends on UX500_SOC_DB8500
 68         default y
 69         help
 70           Use the always on PRCMU Timer as clocksource
 71 
 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)
 75         default y
 76         help
 77           Use the always on PRCMU Timer as sched_clock
 78 
 79 config CLKSRC_EFM32
 80         bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
 81         depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
 82         select CLKSRC_MMIO
 83         default ARCH_EFM32
 84         help
 85           Support to use the timers of EFM32 SoCs as clock source and clock
 86           event device.
 87 
 88 config ARM_ARCH_TIMER
 89         bool
 90         select CLKSRC_OF if OF
 91 
 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
 96         help
 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.
107 
108 config ARM_GLOBAL_TIMER
109         bool
110         select CLKSRC_OF if OF
111         help
112           This options enables support for the ARM global timer unit
113 
114 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
115         bool
116         depends on ARM_GLOBAL_TIMER
117         default y
118         help
119          Use ARM global timer clock source as sched_clock
120 
121 config CLKSRC_METAG_GENERIC
122         def_bool y if METAG
123         help
124           This option enables support for the Meta per-thread timers.
125 
126 config CLKSRC_EXYNOS_MCT
127         def_bool y if ARCH_EXYNOS
128         help
129           Support for Multi Core Timer controller on Exynos SoCs.
130 
131 config CLKSRC_SAMSUNG_PWM
132         bool
133         help
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.
138 
139 config FSL_FTM_TIMER
140         bool
141         help
142           Support for Freescale FlexTimer Module (FTM) timer.
143 
144 config VF_PIT_TIMER
145         bool
146         help
147           Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
148 
149 config SYS_SUPPORTS_SH_CMT
150         bool
151 
152 config SYS_SUPPORTS_SH_MTU2
153         bool
154 
155 config SYS_SUPPORTS_SH_TMU
156         bool
157 
158 config SYS_SUPPORTS_EM_STI
159         bool
160 
161 config SH_TIMER_CMT
162         bool "Renesas CMT timer driver" if COMPILE_TEST
163         depends on GENERIC_CLOCKEVENTS
164         default SYS_SUPPORTS_SH_CMT
165         help
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.
169 
170 config SH_TIMER_MTU2
171         bool "Renesas MTU2 timer driver" if COMPILE_TEST
172         depends on GENERIC_CLOCKEVENTS
173         default SYS_SUPPORTS_SH_MTU2
174         help
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.
178 
179 config SH_TIMER_TMU
180         bool "Renesas TMU timer driver" if COMPILE_TEST
181         depends on GENERIC_CLOCKEVENTS
182         default SYS_SUPPORTS_SH_TMU
183         help
184           This enables build of a clocksource and clockevent driver for
185           the 32-bit Timer Unit (TMU) hardware available on a wide range
186           SoCs from Renesas.
187 
188 config EM_TIMER_STI
189         bool "Renesas STI timer driver" if COMPILE_TEST
190         depends on GENERIC_CLOCKEVENTS
191         default SYS_SUPPORTS_EM_STI
192         help
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.
196 
197 config CLKSRC_QCOM
198         bool
199 
200 config CLKSRC_VERSATILE
201         bool "ARM Versatile (Express) reference platforms clock source"
202         depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
203         select CLKSRC_OF
204         default y if MFD_VEXPRESS_SYSREG
205         help
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
209           platforms.

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