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