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 ATMEL_ST 147 bool 148 select CLKSRC_OF 149 select MFD_SYSCON 150 151config CLKSRC_METAG_GENERIC 152 def_bool y if METAG 153 help 154 This option enables support for the Meta per-thread timers. 155 156config CLKSRC_EXYNOS_MCT 157 def_bool y if ARCH_EXYNOS 158 depends on !ARM64 159 help 160 Support for Multi Core Timer controller on Exynos SoCs. 161 162config CLKSRC_SAMSUNG_PWM 163 bool 164 help 165 This is a new clocksource driver for the PWM timer found in 166 Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver 167 for all devicetree enabled platforms. This driver will be 168 needed only on systems that do not have the Exynos MCT available. 169 170config FSL_FTM_TIMER 171 bool 172 help 173 Support for Freescale FlexTimer Module (FTM) timer. 174 175config VF_PIT_TIMER 176 bool 177 help 178 Support for Period Interrupt Timer on Freescale Vybrid Family SoCs. 179 180config SYS_SUPPORTS_SH_CMT 181 bool 182 183config MTK_TIMER 184 select CLKSRC_OF 185 select CLKSRC_MMIO 186 bool 187 188config SYS_SUPPORTS_SH_MTU2 189 bool 190 191config SYS_SUPPORTS_SH_TMU 192 bool 193 194config SYS_SUPPORTS_EM_STI 195 bool 196 197config SH_TIMER_CMT 198 bool "Renesas CMT timer driver" if COMPILE_TEST 199 depends on GENERIC_CLOCKEVENTS 200 depends on HAS_IOMEM 201 default SYS_SUPPORTS_SH_CMT 202 help 203 This enables build of a clocksource and clockevent driver for 204 the Compare Match Timer (CMT) hardware available in 16/32/48-bit 205 variants on a wide range of Mobile and Automotive SoCs from Renesas. 206 207config SH_TIMER_MTU2 208 bool "Renesas MTU2 timer driver" if COMPILE_TEST 209 depends on GENERIC_CLOCKEVENTS 210 depends on HAS_IOMEM 211 default SYS_SUPPORTS_SH_MTU2 212 help 213 This enables build of a clockevent driver for the Multi-Function 214 Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas. 215 This hardware comes with 16 bit-timer registers. 216 217config SH_TIMER_TMU 218 bool "Renesas TMU timer driver" if COMPILE_TEST 219 depends on GENERIC_CLOCKEVENTS 220 depends on HAS_IOMEM 221 default SYS_SUPPORTS_SH_TMU 222 help 223 This enables build of a clocksource and clockevent driver for 224 the 32-bit Timer Unit (TMU) hardware available on a wide range 225 SoCs from Renesas. 226 227config EM_TIMER_STI 228 bool "Renesas STI timer driver" if COMPILE_TEST 229 depends on GENERIC_CLOCKEVENTS && HAS_IOMEM 230 default SYS_SUPPORTS_EM_STI 231 help 232 This enables build of a clocksource and clockevent driver for 233 the 48-bit System Timer (STI) hardware available on a SoCs 234 such as EMEV2 from former NEC Electronics. 235 236config CLKSRC_QCOM 237 bool 238 239config CLKSRC_VERSATILE 240 bool "ARM Versatile (Express) reference platforms clock source" 241 depends on PLAT_VERSATILE && GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET 242 select CLKSRC_OF 243 default y if MFD_VEXPRESS_SYSREG 244 help 245 This option enables clock source based on free running 246 counter available in the "System Registers" block of 247 ARM Versatile, RealView and Versatile Express reference 248 platforms. 249 250config CLKSRC_MIPS_GIC 251 bool 252 depends on MIPS_GIC 253 select CLKSRC_OF 254 255config CLKSRC_PXA 256 def_bool y if ARCH_PXA || ARCH_SA1100 257 select CLKSRC_OF if USE_OF 258 help 259 This enables OST0 support available on PXA and SA-11x0 260 platforms. 261endmenu 262