drivers/clocksource/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 menu "Clock Source drivers"
   3         depends on GENERIC_CLOCKEVENTS
   4
   5 config TIMER_OF
   6         bool
   7         select TIMER_PROBE
   8
   9 config TIMER_ACPI
  10         bool
  11         select TIMER_PROBE
  12
  13 config TIMER_PROBE
  14         bool
  15
  16 config CLKSRC_I8253
  17         bool
  18
  19 config CLKEVT_I8253
  20         bool
  21
  22 config I8253_LOCK
  23         bool
  24
  25 config OMAP_DM_TIMER
  26         bool
  27
  28 config CLKBLD_I8253
  29         def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
  30
  31 config CLKSRC_MMIO
  32         bool
  33
  34 config BCM2835_TIMER
  35         bool "BCM2835 timer driver" if COMPILE_TEST
  36         select CLKSRC_MMIO
  37         help
  38           Enables the support for the BCM2835 timer driver.
  39
  40 config BCM_KONA_TIMER
  41         bool "BCM mobile timer driver" if COMPILE_TEST
  42         select CLKSRC_MMIO
  43         help
  44           Enables the support for the BCM Kona mobile timer driver.
  45
  46 config DAVINCI_TIMER
  47         bool "Texas Instruments DaVinci timer driver" if COMPILE_TEST
  48         help
  49           Enables the support for the TI DaVinci timer driver.
  50
  51 config DIGICOLOR_TIMER
  52         bool "Digicolor timer driver" if COMPILE_TEST
  53         select CLKSRC_MMIO
  54         depends on HAS_IOMEM
  55         help
  56           Enables the support for the digicolor timer driver.
  57
  58 config DW_APB_TIMER
  59         bool "DW APB timer driver" if COMPILE_TEST
  60         help
  61           Enables the support for the dw_apb timer.
  62
  63 config DW_APB_TIMER_OF
  64         bool
  65         select DW_APB_TIMER
  66         select TIMER_OF
  67
  68 config FTTMR010_TIMER
  69         bool "Faraday Technology timer driver" if COMPILE_TEST
  70         depends on HAS_IOMEM
  71         select CLKSRC_MMIO
  72         select TIMER_OF
  73         select MFD_SYSCON
  74         help
  75           Enables support for the Faraday Technology timer block
  76           FTTMR010.
  77
  78 config IXP4XX_TIMER
  79         bool "Intel XScale IXP4xx timer driver" if COMPILE_TEST
  80         depends on HAS_IOMEM
  81         select CLKSRC_MMIO
  82         help
  83           Enables support for the Intel XScale IXP4xx SoC timer.
  84
  85 config ROCKCHIP_TIMER
  86         bool "Rockchip timer driver" if COMPILE_TEST
  87         depends on ARM || ARM64
  88         select TIMER_OF
  89         select CLKSRC_MMIO
  90         help
  91           Enables the support for the rockchip timer driver.
  92
  93 config ARMADA_370_XP_TIMER
  94         bool "Armada 370 and XP timer driver" if COMPILE_TEST
  95         depends on ARM
  96         select TIMER_OF
  97         select CLKSRC_MMIO
  98         help
  99           Enables the support for the Armada 370 and XP timer driver.
 100
 101 config MESON6_TIMER
 102         bool "Meson6 timer driver" if COMPILE_TEST
 103         select CLKSRC_MMIO
 104         help
 105           Enables the support for the Meson6 timer driver.
 106
 107 config ORION_TIMER
 108         bool "Orion timer driver" if COMPILE_TEST
 109         depends on ARM
 110         select TIMER_OF
 111         select CLKSRC_MMIO
 112         help
 113           Enables the support for the Orion timer driver
 114
 115 config OWL_TIMER
 116         bool "Owl timer driver" if COMPILE_TEST
 117         select CLKSRC_MMIO
 118         help
 119           Enables the support for the Actions Semi Owl timer driver.
 120
 121 config RDA_TIMER
 122         bool "RDA timer driver" if COMPILE_TEST
 123         depends on GENERIC_CLOCKEVENTS
 124         select CLKSRC_MMIO
 125         select TIMER_OF
 126         help
 127           Enables the support for the RDA Micro timer driver.
 128
 129 config SUN4I_TIMER
 130         bool "Sun4i timer driver" if COMPILE_TEST
 131         depends on HAS_IOMEM
 132         select CLKSRC_MMIO
 133         select TIMER_OF
 134         help
 135           Enables support for the Sun4i timer.
 136
 137 config SUN5I_HSTIMER
 138         bool "Sun5i timer driver" if COMPILE_TEST
 139         select CLKSRC_MMIO
 140         depends on COMMON_CLK
 141         help
 142           Enables support the Sun5i timer.
 143
 144 config TEGRA_TIMER
 145         bool "Tegra timer driver" if COMPILE_TEST
 146         select CLKSRC_MMIO
 147         select TIMER_OF
 148         depends on ARCH_TEGRA || COMPILE_TEST
 149         help
 150           Enables support for the Tegra driver.
 151
 152 config VT8500_TIMER
 153         bool "VT8500 timer driver" if COMPILE_TEST
 154         depends on HAS_IOMEM
 155         help
 156           Enables support for the VT8500 driver.
 157
 158 config NPCM7XX_TIMER
 159         bool "NPCM7xx timer driver" if COMPILE_TEST
 160         depends on HAS_IOMEM
 161         select TIMER_OF
 162         select CLKSRC_MMIO
 163         help
 164           Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
 165           While TIMER0 serves as clockevent and TIMER1 serves as clocksource.
 166
 167 config CADENCE_TTC_TIMER
 168         bool "Cadence TTC timer driver" if COMPILE_TEST
 169         depends on COMMON_CLK
 170         help
 171           Enables support for the cadence ttc driver.
 172
 173 config ASM9260_TIMER
 174         bool "ASM9260 timer driver" if COMPILE_TEST
 175         select CLKSRC_MMIO
 176         select TIMER_OF
 177         help
 178           Enables support for the ASM9260 timer.
 179
 180 config CLKSRC_NOMADIK_MTU
 181         bool "Nomakdik clocksource driver" if COMPILE_TEST
 182         depends on ARM
 183         select CLKSRC_MMIO
 184         help
 185           Support for Multi Timer Unit. MTU provides access
 186           to multiple interrupt generating programmable
 187           32-bit free running decrementing counters.
 188
 189 config CLKSRC_DBX500_PRCMU
 190         bool "Clocksource PRCMU Timer" if COMPILE_TEST
 191         depends on HAS_IOMEM
 192         help
 193           Use the always on PRCMU Timer as clocksource
 194
 195 config CLPS711X_TIMER
 196         bool "Cirrus logic timer driver" if COMPILE_TEST
 197         select CLKSRC_MMIO
 198         help
 199           Enables support for the Cirrus Logic PS711 timer.
 200
 201 config ATLAS7_TIMER
 202         bool "Atlas7 timer driver" if COMPILE_TEST
 203         select CLKSRC_MMIO
 204         help
 205           Enables support for the Atlas7 timer.
 206
 207 config MXS_TIMER
 208         bool "Mxs timer driver" if COMPILE_TEST
 209         select CLKSRC_MMIO
 210         select STMP_DEVICE
 211         help
 212           Enables support for the Mxs timer.
 213
 214 config PRIMA2_TIMER
 215         bool "Prima2 timer driver" if COMPILE_TEST
 216         select CLKSRC_MMIO
 217         help
 218           Enables support for the Prima2 timer.
 219
 220 config U300_TIMER
 221         bool "U300 timer driver" if COMPILE_TEST
 222         depends on ARM
 223         select CLKSRC_MMIO
 224         help
 225           Enables support for the U300 timer.
 226
 227 config NSPIRE_TIMER
 228         bool "NSpire timer driver" if COMPILE_TEST
 229         select CLKSRC_MMIO
 230         help
 231           Enables support for the Nspire timer.
 232
 233 config KEYSTONE_TIMER
 234         bool "Keystone timer driver" if COMPILE_TEST
 235         depends on ARM || ARM64
 236         select CLKSRC_MMIO
 237         help
 238           Enables support for the Keystone timer.
 239
 240 config INTEGRATOR_AP_TIMER
 241         bool "Integrator-ap timer driver" if COMPILE_TEST
 242         select CLKSRC_MMIO
 243         help
 244           Enables support for the Integrator-ap timer.
 245
 246 config CLKSRC_EFM32
 247         bool "Clocksource for Energy Micro's EFM32 SoCs" if !ARCH_EFM32
 248         depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
 249         select CLKSRC_MMIO
 250         default ARCH_EFM32
 251         help
 252           Support to use the timers of EFM32 SoCs as clock source and clock
 253           event device.
 254
 255 config CLKSRC_LPC32XX
 256         bool "Clocksource for LPC32XX" if COMPILE_TEST
 257         depends on HAS_IOMEM
 258         depends on ARM
 259         select CLKSRC_MMIO
 260         select TIMER_OF
 261         help
 262           Support for the LPC32XX clocksource.
 263
 264 config CLKSRC_PISTACHIO
 265         bool "Clocksource for Pistachio SoC" if COMPILE_TEST
 266         depends on HAS_IOMEM
 267         select TIMER_OF
 268         help
 269           Enables the clocksource for the Pistachio SoC.
 270
 271 config CLKSRC_TI_32K
 272         bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
 273         depends on GENERIC_SCHED_CLOCK
 274         select TIMER_OF if OF
 275         help
 276           This option enables support for Texas Instruments 32.768 Hz clocksource
 277           available on many OMAP-like platforms.
 278
 279 config CLKSRC_NPS
 280         bool "NPS400 clocksource driver" if COMPILE_TEST
 281         depends on !PHYS_ADDR_T_64BIT
 282         select CLKSRC_MMIO
 283         select TIMER_OF if OF
 284         help
 285           NPS400 clocksource support.
 286           Got 64 bit counter with update rate up to 1000MHz.
 287           This counter is accessed via couple of 32 bit memory mapped registers.
 288
 289 config CLKSRC_STM32
 290         bool "Clocksource for STM32 SoCs" if !ARCH_STM32
 291         depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
 292         select CLKSRC_MMIO
 293         select TIMER_OF
 294
 295 config CLKSRC_MPS2
 296         bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
 297         depends on GENERIC_SCHED_CLOCK
 298         select CLKSRC_MMIO
 299         select TIMER_OF
 300
 301 config ARC_TIMERS
 302         bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
 303         depends on GENERIC_SCHED_CLOCK
 304         select TIMER_OF
 305         help
 306           These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
 307           (ARC700 as well as ARC HS38).
 308           TIMER0 serves as clockevent while TIMER1 provides clocksource
 309
 310 config ARC_TIMERS_64BIT
 311         bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST
 312         depends on ARC_TIMERS
 313         select TIMER_OF
 314         help
 315           This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP)
 316           RTC is implemented inside the core, while GFRC sits outside the core in
 317           ARConnect IP block. Driver automatically picks one of them for clocksource
 318           as appropriate.
 319
 320 config ARM_ARCH_TIMER
 321         bool
 322         select TIMER_OF if OF
 323         select TIMER_ACPI if ACPI
 324
 325 config ARM_ARCH_TIMER_EVTSTREAM
 326         bool "Enable ARM architected timer event stream generation by default"
 327         default y if ARM_ARCH_TIMER
 328         depends on ARM_ARCH_TIMER
 329         help
 330           This option enables support by default for event stream generation
 331           based on the ARM architected timer. It is used for waking up CPUs
 332           executing the wfe instruction at a frequency represented as a
 333           power-of-2 divisor of the clock rate. The behaviour can also be
 334           overridden on the command line using the
 335           clocksource.arm_arch_timer.evtstream parameter.
 336           The main use of the event stream is wfe-based timeouts of userspace
 337           locking implementations. It might also be useful for imposing timeout
 338           on wfe to safeguard against any programming errors in case an expected
 339           event is not generated.
 340           This must be disabled for hardware validation purposes to detect any
 341           hardware anomalies of missing events.
 342
 343 config ARM_ARCH_TIMER_OOL_WORKAROUND
 344         bool
 345
 346 config FSL_ERRATUM_A008585
 347         bool "Workaround for Freescale/NXP Erratum A-008585"
 348         default y
 349         depends on ARM_ARCH_TIMER && ARM64
 350         select ARM_ARCH_TIMER_OOL_WORKAROUND
 351         help
 352           This option enables a workaround for Freescale/NXP Erratum
 353           A-008585 ("ARM generic timer may contain an erroneous
 354           value").  The workaround will only be active if the
 355           fsl,erratum-a008585 property is found in the timer node.
 356
 357 config HISILICON_ERRATUM_161010101
 358         bool "Workaround for Hisilicon Erratum 161010101"
 359         default y
 360         select ARM_ARCH_TIMER_OOL_WORKAROUND
 361         depends on ARM_ARCH_TIMER && ARM64
 362         help
 363           This option enables a workaround for Hisilicon Erratum
 364           161010101. The workaround will be active if the hisilicon,erratum-161010101
 365           property is found in the timer node.
 366
 367 config ARM64_ERRATUM_858921
 368         bool "Workaround for Cortex-A73 erratum 858921"
 369         default y
 370         select ARM_ARCH_TIMER_OOL_WORKAROUND
 371         depends on ARM_ARCH_TIMER && ARM64
 372         help
 373           This option enables a workaround applicable to Cortex-A73
 374           (all versions), whose counter may return incorrect values.
 375           The workaround will be dynamically enabled when an affected
 376           core is detected.
 377
 378 config SUN50I_ERRATUM_UNKNOWN1
 379         bool "Workaround for Allwinner A64 erratum UNKNOWN1"
 380         default y
 381         depends on ARM_ARCH_TIMER && ARM64 && ARCH_SUNXI
 382         select ARM_ARCH_TIMER_OOL_WORKAROUND
 383         help
 384           This option enables a workaround for instability in the timer on
 385           the Allwinner A64 SoC. The workaround will only be active if the
 386           allwinner,erratum-unknown1 property is found in the timer node.
 387
 388 config ARM_GLOBAL_TIMER
 389         bool "Support for the ARM global timer" if COMPILE_TEST
 390         select TIMER_OF if OF
 391         depends on ARM
 392         help
 393           This options enables support for the ARM global timer unit
 394
 395 config ARM_TIMER_SP804
 396         bool "Support for Dual Timer SP804 module" if COMPILE_TEST
 397         depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP
 398         select CLKSRC_MMIO
 399         select TIMER_OF if OF
 400
 401 config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
 402         bool
 403         depends on ARM_GLOBAL_TIMER
 404         default y
 405         help
 406          Use ARM global timer clock source as sched_clock
 407
 408 config ARMV7M_SYSTICK
 409         bool "Support for the ARMv7M system time" if COMPILE_TEST
 410         select TIMER_OF if OF
 411         select CLKSRC_MMIO
 412         help
 413           This options enables support for the ARMv7M system timer unit
 414
 415 config ATMEL_PIT
 416         bool "Atmel PIT support" if COMPILE_TEST
 417         depends on HAS_IOMEM
 418         select TIMER_OF if OF
 419         help
 420           Support for the Periodic Interval Timer found on Atmel SoCs.
 421
 422 config ATMEL_ST
 423         bool "Atmel ST timer support" if COMPILE_TEST
 424         depends on HAS_IOMEM
 425         select TIMER_OF
 426         select MFD_SYSCON
 427         help
 428           Support for the Atmel ST timer.
 429
 430 config ATMEL_TCB_CLKSRC
 431         bool "Atmel TC Block timer driver" if COMPILE_TEST
 432         depends on ARM && HAS_IOMEM
 433         select TIMER_OF if OF
 434         help
 435           Support for Timer Counter Blocks on Atmel SoCs.
 436
 437 config CLKSRC_EXYNOS_MCT
 438         bool "Exynos multi core timer driver" if COMPILE_TEST
 439         depends on ARM || ARM64
 440         help
 441           Support for Multi Core Timer controller on Exynos SoCs.
 442
 443 config CLKSRC_SAMSUNG_PWM
 444         bool "PWM timer driver for Samsung S3C, S5P" if COMPILE_TEST
 445         depends on HAS_IOMEM
 446         help
 447           This is a new clocksource driver for the PWM timer found in
 448           Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver
 449           for all devicetree enabled platforms. This driver will be
 450           needed only on systems that do not have the Exynos MCT available.
 451
 452 config FSL_FTM_TIMER
 453         bool "Freescale FlexTimer Module driver" if COMPILE_TEST
 454         depends on HAS_IOMEM
 455         select CLKSRC_MMIO
 456         help
 457           Support for Freescale FlexTimer Module (FTM) timer.
 458
 459 config VF_PIT_TIMER
 460         bool
 461         select CLKSRC_MMIO
 462         help
 463           Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
 464
 465 config OXNAS_RPS_TIMER
 466         bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
 467         select TIMER_OF
 468         select CLKSRC_MMIO
 469         help
 470           This enables support for the Oxford Semiconductor OXNAS RPS timers.
 471
 472 config SYS_SUPPORTS_SH_CMT
 473         bool
 474
 475 config MTK_TIMER
 476         bool "Mediatek timer driver" if COMPILE_TEST
 477         depends on HAS_IOMEM
 478         select TIMER_OF
 479         select CLKSRC_MMIO
 480         help
 481           Support for Mediatek timer driver.
 482
 483 config SPRD_TIMER
 484         bool "Spreadtrum timer driver" if EXPERT
 485         depends on HAS_IOMEM
 486         depends on (ARCH_SPRD || COMPILE_TEST)
 487         default ARCH_SPRD
 488         select TIMER_OF
 489         help
 490           Enables support for the Spreadtrum timer driver.
 491
 492 config SYS_SUPPORTS_SH_MTU2
 493         bool
 494
 495 config SYS_SUPPORTS_SH_TMU
 496         bool
 497
 498 config SYS_SUPPORTS_EM_STI
 499         bool
 500
 501 config CLKSRC_JCORE_PIT
 502         bool "J-Core PIT timer driver" if COMPILE_TEST
 503         depends on OF
 504         depends on HAS_IOMEM
 505         select CLKSRC_MMIO
 506         help
 507           This enables build of clocksource and clockevent driver for
 508           the integrated PIT in the J-Core synthesizable, open source SoC.
 509
 510 config SH_TIMER_CMT
 511         bool "Renesas CMT timer driver" if COMPILE_TEST
 512         depends on HAS_IOMEM
 513         default SYS_SUPPORTS_SH_CMT
 514         help
 515           This enables build of a clocksource and clockevent driver for
 516           the Compare Match Timer (CMT) hardware available in 16/32/48-bit
 517           variants on a wide range of Mobile and Automotive SoCs from Renesas.
 518
 519 config SH_TIMER_MTU2
 520         bool "Renesas MTU2 timer driver" if COMPILE_TEST
 521         depends on HAS_IOMEM
 522         default SYS_SUPPORTS_SH_MTU2
 523         help
 524           This enables build of a clockevent driver for the Multi-Function
 525           Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
 526           This hardware comes with 16 bit-timer registers.
 527
 528 config RENESAS_OSTM
 529         bool "Renesas OSTM timer driver" if COMPILE_TEST
 530         select CLKSRC_MMIO
 531         help
 532           Enables the support for the Renesas OSTM.
 533
 534 config SH_TIMER_TMU
 535         bool "Renesas TMU timer driver" if COMPILE_TEST
 536         depends on HAS_IOMEM
 537         default SYS_SUPPORTS_SH_TMU
 538         help
 539           This enables build of a clocksource and clockevent driver for
 540           the 32-bit Timer Unit (TMU) hardware available on a wide range
 541           SoCs from Renesas.
 542
 543 config EM_TIMER_STI
 544         bool "Renesas STI timer driver" if COMPILE_TEST
 545         depends on HAS_IOMEM
 546         default SYS_SUPPORTS_EM_STI
 547         help
 548           This enables build of a clocksource and clockevent driver for
 549           the 48-bit System Timer (STI) hardware available on a SoCs
 550           such as EMEV2 from former NEC Electronics.
 551
 552 config CLKSRC_QCOM
 553         bool "Qualcomm MSM timer" if COMPILE_TEST
 554         depends on ARM
 555         select TIMER_OF
 556         help
 557           This enables the clocksource and the per CPU clockevent driver for the
 558           Qualcomm SoCs.
 559
 560 config CLKSRC_VERSATILE
 561         bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
 562         depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
 563         select TIMER_OF
 564         default y if MFD_VEXPRESS_SYSREG
 565         help
 566           This option enables clock source based on free running
 567           counter available in the "System Registers" block of
 568           ARM Versatile, RealView and Versatile Express reference
 569           platforms.
 570
 571 config CLKSRC_MIPS_GIC
 572         bool
 573         depends on MIPS_GIC
 574         select TIMER_OF
 575
 576 config CLKSRC_TANGO_XTAL
 577         bool "Clocksource for Tango SoC" if COMPILE_TEST
 578         depends on ARM
 579         select TIMER_OF
 580         select CLKSRC_MMIO
 581         help
 582           This enables the clocksource for Tango SoC
 583
 584 config CLKSRC_PXA
 585         bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
 586         depends on HAS_IOMEM
 587         select CLKSRC_MMIO
 588         help
 589           This enables OST0 support available on PXA and SA-11x0
 590           platforms.
 591
 592 config H8300_TMR8
 593         bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
 594         depends on HAS_IOMEM
 595         help
 596           This enables the 8 bits timer for the H8300 platform.
 597
 598 config H8300_TMR16
 599         bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
 600         depends on HAS_IOMEM
 601         help
 602           This enables the 16 bits timer for the H8300 platform with the
 603           H83069 cpu.
 604
 605 config H8300_TPU
 606         bool "Clocksource for the H8300 platform" if COMPILE_TEST
 607         depends on HAS_IOMEM
 608         help
 609           This enables the clocksource for the H8300 platform with the
 610           H8S2678 cpu.
 611
 612 config CLKSRC_IMX_GPT
 613         bool "Clocksource using i.MX GPT" if COMPILE_TEST
 614         depends on (ARM || ARM64) && CLKDEV_LOOKUP
 615         select CLKSRC_MMIO
 616
 617 config CLKSRC_IMX_TPM
 618         bool "Clocksource using i.MX TPM" if COMPILE_TEST
 619         depends on ARM && CLKDEV_LOOKUP
 620         select CLKSRC_MMIO
 621         help
 622           Enable this option to use IMX Timer/PWM Module (TPM) timer as
 623           clocksource.
 624
 625 config TIMER_IMX_SYS_CTR
 626         bool "i.MX system counter timer" if COMPILE_TEST
 627         select TIMER_OF
 628         help
 629           Enable this option to use i.MX system counter timer as a
 630           clockevent.
 631
 632 config CLKSRC_ST_LPC
 633         bool "Low power clocksource found in the LPC" if COMPILE_TEST
 634         select TIMER_OF if OF
 635         depends on HAS_IOMEM
 636         select CLKSRC_MMIO
 637         help
 638           Enable this option to use the Low Power controller timer
 639           as clocksource.
 640
 641 config ATCPIT100_TIMER
 642         bool "ATCPIT100 timer driver"
 643         depends on NDS32 || COMPILE_TEST
 644         depends on HAS_IOMEM
 645         select TIMER_OF
 646         default NDS32
 647         help
 648           This option enables support for the Andestech ATCPIT100 timers.
 649
 650 config RISCV_TIMER
 651         bool "Timer for the RISC-V platform"
 652         depends on GENERIC_SCHED_CLOCK && RISCV
 653         default y
 654         select TIMER_PROBE
 655         select TIMER_OF
 656         help
 657           This enables the per-hart timer built into all RISC-V systems, which
 658           is accessed via both the SBI and the rdcycle instruction.  This is
 659           required for all RISC-V systems.
 660
 661 config CSKY_MP_TIMER
 662         bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
 663         depends on CSKY
 664         select TIMER_OF
 665         help
 666           Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP
 667           system.
 668           csky,mptimer is not only used in SMP system, it also could be used
 669           single core system. It's not a mmio reg and it use mtcr/mfcr instruction.
 670
 671 config GX6605S_TIMER
 672         bool "Gx6605s SOC system timer driver" if COMPILE_TEST
 673         depends on CSKY
 674         select CLKSRC_MMIO
 675         select TIMER_OF
 676         help
 677           This option enables support for gx6605s SOC's timer.
 678
 679 config MILBEAUT_TIMER
 680         bool "Milbeaut timer driver" if COMPILE_TEST
 681         depends on OF
 682         depends on ARM
 683         select TIMER_OF
 684         select CLKSRC_MMIO
 685         help
 686           Enables the support for Milbeaut timer driver.
 687
 688 endmenu