1menu "Clock Source drivers" 2 3config CLKSRC_OF 4 bool 5 6config CLKSRC_I8253 7 bool 8 9config CLKEVT_I8253 10 bool 11 12config I8253_LOCK 13 bool 14 15config CLKBLD_I8253 16 def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK 17 18config CLKSRC_MMIO 19 bool 20 21config DIGICOLOR_TIMER 22 bool 23 24config DW_APB_TIMER 25 bool 26 27config DW_APB_TIMER_OF 28 bool 29 select DW_APB_TIMER 30 select CLKSRC_OF 31 32config ROCKCHIP_TIMER 33 bool 34 select CLKSRC_OF 35 36config ARMADA_370_XP_TIMER 37 bool 38 select CLKSRC_OF 39 40config MESON6_TIMER 41 bool 42 select CLKSRC_MMIO 43 44config ORION_TIMER 45 select CLKSRC_OF 46 select CLKSRC_MMIO 47 bool 48 49config SUN4I_TIMER 50 select CLKSRC_MMIO 51 bool 52 53config SUN5I_HSTIMER 54 select CLKSRC_MMIO 55 bool 56 57config TEGRA_TIMER 58 bool 59 60config VT8500_TIMER 61 bool 62 63config CADENCE_TTC_TIMER 64 bool 65 66config ASM9260_TIMER 67 bool 68 select CLKSRC_MMIO 69 select CLKSRC_OF 70 71config 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 80config 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 86config 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 93config 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 100config 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 109config ARM_ARCH_TIMER 110 bool 111 select CLKSRC_OF if OF 112 113config 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 129config 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 135config 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 142config ATMEL_PIT 143 select CLKSRC_OF if OF 144 def_bool SOC_AT91SAM9 || SOC_SAMA5 145 146config CLKSRC_METAG_GENERIC 147 def_bool y if METAG 148 help 149 This option enables support for the Meta per-thread timers. 150 151config 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 157config 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 165config FSL_FTM_TIMER 166 bool 167 help 168 Support for Freescale FlexTimer Module (FTM) timer. 169 170config VF_PIT_TIMER 171 bool 172 help 173 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs. 174 175config SYS_SUPPORTS_SH_CMT 176 bool 177 178config MTK_TIMER 179 select CLKSRC_OF 180 select CLKSRC_MMIO 181 bool 182 183config SYS_SUPPORTS_SH_MTU2 184 bool 185 186config SYS_SUPPORTS_SH_TMU 187 bool 188 189config SYS_SUPPORTS_EM_STI 190 bool 191 192config SH_TIMER_CMT 193 bool "Renesas CMT timer driver" if COMPILE_TEST 194 depends on GENERIC_CLOCKEVENTS 195 default SYS_SUPPORTS_SH_CMT 196 help 197 This enables build of a clocksource and clockevent driver for 198 the Compare Match Timer (CMT) hardware available in 16/32/48-bit 199 variants on a wide range of Mobile and Automotive SoCs from Renesas. 200 201config SH_TIMER_MTU2 202 bool "Renesas MTU2 timer driver" if COMPILE_TEST 203 depends on GENERIC_CLOCKEVENTS 204 default SYS_SUPPORTS_SH_MTU2 205 help 206 This enables build of a clockevent driver for the Multi-Function 207 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas. 208 This hardware comes with 16 bit-timer registers. 209 210config SH_TIMER_TMU 211 bool "Renesas TMU timer driver" if COMPILE_TEST 212 depends on GENERIC_CLOCKEVENTS 213 default SYS_SUPPORTS_SH_TMU 214 help 215 This enables build of a clocksource and clockevent driver for 216 the 32-bit Timer Unit (TMU) hardware available on a wide range 217 SoCs from Renesas. 218 219config EM_TIMER_STI 220 bool "Renesas STI timer driver" if COMPILE_TEST 221 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM 222 default SYS_SUPPORTS_EM_STI 223 help 224 This enables build of a clocksource and clockevent driver for 225 the 48-bit System Timer (STI) hardware available on a SoCs 226 such as EMEV2 from former NEC Electronics. 227 228config CLKSRC_QCOM 229 bool 230 231config CLKSRC_VERSATILE 232 bool "ARM Versatile (Express) reference platforms clock source" 233 depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET 234 select CLKSRC_OF 235 default y if MFD_VEXPRESS_SYSREG 236 help 237 This option enables clock source based on free running 238 counter available in the "System Registers" block of 239 ARM Versatile, RealView and Versatile Express reference 240 platforms. 241 242config CLKSRC_MIPS_GIC 243 bool 244 depends on MIPS_GIC 245 select CLKSRC_OF 246 247config CLKSRC_PXA 248 def_bool y if ARCH_PXA || ARCH_SA1100 249 select CLKSRC_OF if USE_OF 250 help 251 This enables OST0 support available on PXA and SA-11x0 252 platforms. 253endmenu 254