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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 DIGICOLOR_TIMER
 22         bool
 23 
 24 config DW_APB_TIMER
 25         bool
 26 
 27 config DW_APB_TIMER_OF
 28         bool
 29         select DW_APB_TIMER
 30         select CLKSRC_OF
 31 
 32 config ROCKCHIP_TIMER
 33         bool
 34         select CLKSRC_OF
 35 
 36 config ARMADA_370_XP_TIMER
 37         bool
 38         select CLKSRC_OF
 39 
 40 config MESON6_TIMER
 41         bool
 42         select CLKSRC_MMIO
 43 
 44 config ORION_TIMER
 45         select CLKSRC_OF
 46         select CLKSRC_MMIO
 47         bool
 48 
 49 config SUN4I_TIMER
 50         select CLKSRC_MMIO
 51         bool
 52 
 53 config SUN5I_HSTIMER
 54         select CLKSRC_MMIO
 55         bool
 56 
 57 config TEGRA_TIMER
 58         bool
 59 
 60 config VT8500_TIMER
 61         bool
 62 
 63 config CADENCE_TTC_TIMER
 64         bool
 65 
 66 config ASM9260_TIMER
 67         bool
 68         select CLKSRC_MMIO
 69         select CLKSRC_OF
 70 
 71 config CLKSRC_NOMADIK_MTU
 72         bool
 73         depends on (ARCH_NOMADIK || ARCH_U8500)
 74         select CLKSRC_MMIO
 75         help
 76           Support for Multi Timer Unit. MTU provides access
 77           to multiple interrupt generating programmable
 78           32-bit free running decrementing counters.
 79 
 80 config CLKSRC_NOMADIK_MTU_SCHED_CLOCK
 81         bool
 82         depends on CLKSRC_NOMADIK_MTU
 83         help
 84           Use the Multi Timer Unit as the sched_clock.
 85 
 86 config CLKSRC_DBX500_PRCMU
 87         bool "Clocksource PRCMU Timer"
 88         depends on UX500_SOC_DB8500
 89         default y
 90         help
 91           Use the always on PRCMU Timer as clocksource
 92 
 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)
 96         default y
 97         help
 98           Use the always on PRCMU Timer as sched_clock
 99 
100 config CLKSRC_EFM32
101         bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
102         depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
103         select CLKSRC_MMIO
104         default ARCH_EFM32
105         help
106           Support to use the timers of EFM32 SoCs as clock source and clock
107           event device.
108 
109 config ARM_ARCH_TIMER
110         bool
111         select CLKSRC_OF if OF
112 
113 config ARM_ARCH_TIMER_EVTSTREAM
114         bool "Support for ARM architected timer event stream generation"
115         default y if ARM_ARCH_TIMER
116         depends on ARM_ARCH_TIMER
117         help
118           This option enables support for event stream generation based on
119           the ARM architected timer. It is used for waking up CPUs executing
120           the wfe instruction at a frequency represented as a power-of-2
121           divisor of the clock rate.
122           The main use of the event stream is wfe-based timeouts of userspace
123           locking implementations. It might also be useful for imposing timeout
124           on wfe to safeguard against any programming errors in case an expected
125           event is not generated.
126           This must be disabled for hardware validation purposes to detect any
127           hardware anomalies of missing events.
128 
129 config ARM_GLOBAL_TIMER
130         bool
131         select CLKSRC_OF if OF
132         help
133           This options enables support for the ARM global timer unit
134 
135 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
136         bool
137         depends on ARM_GLOBAL_TIMER
138         default y
139         help
140          Use ARM global timer clock source as sched_clock
141 
142 config ATMEL_PIT
143         select CLKSRC_OF if OF
144         def_bool SOC_AT91SAM9 || SOC_SAMA5
145 
146 config CLKSRC_METAG_GENERIC
147         def_bool y if METAG
148         help
149           This option enables support for the Meta per-thread timers.
150 
151 config CLKSRC_EXYNOS_MCT
152         def_bool y if ARCH_EXYNOS
153         depends on !ARM64
154         help
155           Support for Multi Core Timer controller on Exynos SoCs.
156 
157 config CLKSRC_SAMSUNG_PWM
158         bool
159         help
160           This is a new clocksource driver for the PWM timer found in
161           Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
162           for all devicetree enabled platforms. This driver will be
163           needed only on systems that do not have the Exynos MCT available.
164 
165 config FSL_FTM_TIMER
166         bool
167         help
168           Support for Freescale FlexTimer Module (FTM) timer.
169 
170 config VF_PIT_TIMER
171         bool
172         help
173           Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
174 
175 config SYS_SUPPORTS_SH_CMT
176         bool
177 
178 config MTK_TIMER
179         select CLKSRC_OF
180         select CLKSRC_MMIO
181         bool
182 
183 config SYS_SUPPORTS_SH_MTU2
184         bool
185 
186 config SYS_SUPPORTS_SH_TMU
187         bool
188 
189 config SYS_SUPPORTS_EM_STI
190         bool
191 
192 config SH_TIMER_CMT
193         bool "Renesas CMT timer driver" if COMPILE_TEST
194         depends on GENERIC_CLOCKEVENTS
195         depends on HAS_IOMEM
196         default SYS_SUPPORTS_SH_CMT
197         help
198           This enables build of a clocksource and clockevent driver for
199           the Compare Match Timer (CMT) hardware available in 16/32/48-bit
200           variants on a wide range of Mobile and Automotive SoCs from Renesas.
201 
202 config SH_TIMER_MTU2
203         bool "Renesas MTU2 timer driver" if COMPILE_TEST
204         depends on GENERIC_CLOCKEVENTS
205         depends on HAS_IOMEM
206         default SYS_SUPPORTS_SH_MTU2
207         help
208           This enables build of a clockevent driver for the Multi-Function
209           Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
210           This hardware comes with 16 bit-timer registers.
211 
212 config SH_TIMER_TMU
213         bool "Renesas TMU timer driver" if COMPILE_TEST
214         depends on GENERIC_CLOCKEVENTS
215         depends on HAS_IOMEM
216         default SYS_SUPPORTS_SH_TMU
217         help
218           This enables build of a clocksource and clockevent driver for
219           the 32-bit Timer Unit (TMU) hardware available on a wide range
220           SoCs from Renesas.
221 
222 config EM_TIMER_STI
223         bool "Renesas STI timer driver" if COMPILE_TEST
224         depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
225         default SYS_SUPPORTS_EM_STI
226         help
227           This enables build of a clocksource and clockevent driver for
228           the 48-bit System Timer (STI) hardware available on a SoCs
229           such as EMEV2 from former NEC Electronics.
230 
231 config CLKSRC_QCOM
232         bool
233 
234 config CLKSRC_VERSATILE
235         bool "ARM Versatile (Express) reference platforms clock source"
236         depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
237         select CLKSRC_OF
238         default y if MFD_VEXPRESS_SYSREG
239         help
240           This option enables clock source based on free running
241           counter available in the "System Registers" block of
242           ARM Versatile, RealView and Versatile Express reference
243           platforms.
244 
245 config CLKSRC_MIPS_GIC
246         bool
247         depends on MIPS_GIC
248         select CLKSRC_OF
249 
250 config CLKSRC_PXA
251         def_bool y if ARCH_PXA || ARCH_SA1100
252         select CLKSRC_OF if USE_OF
253         help
254           This enables OST0 support available on PXA and SA-11x0
255           platforms.
256 endmenu

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