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Linux/drivers/clocksource/Kconfig

  1 menu "Clock Source drivers"
  2 
  3 config CLKSRC_OF
  4         bool
  5 
  6 config CLKSRC_I8253
  7         bool
  8 
  9 config CLKEVT_I8253
 10         bool
 11 
 12 config I8253_LOCK
 13         bool
 14 
 15 config CLKBLD_I8253
 16         def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
 17 
 18 config CLKSRC_MMIO
 19         bool
 20 
 21 config DW_APB_TIMER
 22         bool
 23 
 24 config DW_APB_TIMER_OF
 25         bool
 26         select DW_APB_TIMER
 27         select CLKSRC_OF
 28 
 29 config ARMADA_370_XP_TIMER
 30         bool
 31         select CLKSRC_OF
 32 
 33 config MESON6_TIMER
 34         bool
 35         select CLKSRC_MMIO
 36 
 37 config ORION_TIMER
 38         select CLKSRC_OF
 39         select CLKSRC_MMIO
 40         bool
 41 
 42 config SUN4I_TIMER
 43         select CLKSRC_MMIO
 44         bool
 45 
 46 config SUN5I_HSTIMER
 47         select CLKSRC_MMIO
 48         bool
 49 
 50 config VT8500_TIMER
 51         bool
 52 
 53 config CADENCE_TTC_TIMER
 54         bool
 55 
 56 config CLKSRC_NOMADIK_MTU
 57         bool
 58         depends on (ARCH_NOMADIK || ARCH_U8500)
 59         select CLKSRC_MMIO
 60         help
 61           Support for Multi Timer Unit. MTU provides access
 62           to multiple interrupt generating programmable
 63           32-bit free running decrementing counters.
 64 
 65 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
 66         bool
 67         depends on CLKSRC_NOMADIK_MTU
 68         help
 69           Use the Multi Timer Unit as the sched_clock.
 70 
 71 config CLKSRC_DBX500_PRCMU
 72         bool "Clocksource PRCMU Timer"
 73         depends on UX500_SOC_DB8500
 74         default y
 75         help
 76           Use the always on PRCMU Timer as clocksource
 77 
 78 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
 79         bool "Clocksource PRCMU Timer sched_clock"
 80         depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
 81         default y
 82         help
 83           Use the always on PRCMU Timer as sched_clock
 84 
 85 config CLKSRC_EFM32
 86         bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
 87         depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
 88         select CLKSRC_MMIO
 89         default ARCH_EFM32
 90         help
 91           Support to use the timers of EFM32 SoCs as clock source and clock
 92           event device.
 93 
 94 config ARM_ARCH_TIMER
 95         bool
 96         select CLKSRC_OF if OF
 97 
 98 config ARM_ARCH_TIMER_EVTSTREAM
 99         bool "Support for ARM architected timer event stream generation"
100         default y if ARM_ARCH_TIMER
101         depends on ARM_ARCH_TIMER
102         help
103           This option enables support for event stream generation based on
104           the ARM architected timer. It is used for waking up CPUs executing
105           the wfe instruction at a frequency represented as a power-of-2
106           divisor of the clock rate.
107           The main use of the event stream is wfe-based timeouts of userspace
108           locking implementations. It might also be useful for imposing timeout
109           on wfe to safeguard against any programming errors in case an expected
110           event is not generated.
111           This must be disabled for hardware validation purposes to detect any
112           hardware anomalies of missing events.
113 
114 config ARM_GLOBAL_TIMER
115         bool
116         select CLKSRC_OF if OF
117         help
118           This options enables support for the ARM global timer unit
119 
120 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
121         bool
122         depends on ARM_GLOBAL_TIMER
123         default y
124         help
125          Use ARM global timer clock source as sched_clock
126 
127 config ATMEL_PIT
128         select CLKSRC_OF if OF
129         def_bool SOC_AT91SAM9 || SOC_SAMA5
130 
131 config CLKSRC_METAG_GENERIC
132         def_bool y if METAG
133         help
134           This option enables support for the Meta per-thread timers.
135 
136 config CLKSRC_EXYNOS_MCT
137         def_bool y if ARCH_EXYNOS
138         depends on !ARM64
139         help
140           Support for Multi Core Timer controller on Exynos SoCs.
141 
142 config CLKSRC_SAMSUNG_PWM
143         bool
144         help
145           This is a new clocksource driver for the PWM timer found in
146           Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
147           for all devicetree enabled platforms. This driver will be
148           needed only on systems that do not have the Exynos MCT available.
149 
150 config FSL_FTM_TIMER
151         bool
152         help
153           Support for Freescale FlexTimer Module (FTM) timer.
154 
155 config VF_PIT_TIMER
156         bool
157         help
158           Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
159 
160 config SYS_SUPPORTS_SH_CMT
161         bool
162 
163 config MTK_TIMER
164         select CLKSRC_OF
165         select CLKSRC_MMIO
166         bool
167 
168 config SYS_SUPPORTS_SH_MTU2
169         bool
170 
171 config SYS_SUPPORTS_SH_TMU
172         bool
173 
174 config SYS_SUPPORTS_EM_STI
175         bool
176 
177 config SH_TIMER_CMT
178         bool "Renesas CMT timer driver" if COMPILE_TEST
179         depends on GENERIC_CLOCKEVENTS
180         default SYS_SUPPORTS_SH_CMT
181         help
182           This enables build of a clocksource and clockevent driver for
183           the Compare Match Timer (CMT) hardware available in 16/32/48-bit
184           variants on a wide range of Mobile and Automotive SoCs from Renesas.
185 
186 config SH_TIMER_MTU2
187         bool "Renesas MTU2 timer driver" if COMPILE_TEST
188         depends on GENERIC_CLOCKEVENTS
189         default SYS_SUPPORTS_SH_MTU2
190         help
191           This enables build of a clockevent driver for the Multi-Function
192           Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
193           This hardware comes with 16 bit-timer registers.
194 
195 config SH_TIMER_TMU
196         bool "Renesas TMU timer driver" if COMPILE_TEST
197         depends on GENERIC_CLOCKEVENTS
198         default SYS_SUPPORTS_SH_TMU
199         help
200           This enables build of a clocksource and clockevent driver for
201           the 32-bit Timer Unit (TMU) hardware available on a wide range
202           SoCs from Renesas.
203 
204 config EM_TIMER_STI
205         bool "Renesas STI timer driver" if COMPILE_TEST
206         depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
207         default SYS_SUPPORTS_EM_STI
208         help
209           This enables build of a clocksource and clockevent driver for
210           the 48-bit System Timer (STI) hardware available on a SoCs
211           such as EMEV2 from former NEC Electronics.
212 
213 config CLKSRC_QCOM
214         bool
215 
216 config CLKSRC_VERSATILE
217         bool "ARM Versatile (Express) reference platforms clock source"
218         depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
219         select CLKSRC_OF
220         default y if MFD_VEXPRESS_SYSREG
221         help
222           This option enables clock source based on free running
223           counter available in the "System Registers" block of
224           ARM Versatile, RealView and Versatile Express reference
225           platforms.
226 
227 config CLKSRC_MIPS_GIC
228         bool
229         depends on MIPS_GIC
230         select CLKSRC_OF
231 
232 endmenu

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