1menu "Timer Support" 2 3config TIMER 4 bool "Enable driver model for timer drivers" 5 depends on DM 6 help 7 Enable driver model for timer access. It uses the same API as 8 lib/time.c, but now implemented by the uclass. The first timer 9 will be used. The timer is usually a 32 bits free-running up 10 counter. There may be no real tick, and no timer interrupt. 11 12config SPL_TIMER 13 bool "Enable driver model for timer drivers in SPL" 14 depends on TIMER && SPL 15 help 16 Enable support for timer drivers in SPL. These can be used to get 17 a timer value when in SPL, or perhaps for implementing a delay 18 function. This enables the drivers in drivers/timer as part of an 19 SPL build. 20 21config TPL_TIMER 22 bool "Enable driver model for timer drivers in TPL" 23 depends on TIMER && TPL 24 help 25 Enable support for timer drivers in TPL. These can be used to get 26 a timer value when in TPL, or perhaps for implementing a delay 27 function. This enables the drivers in drivers/timer as part of an 28 TPL build. 29 30config TIMER_EARLY 31 bool "Allow timer to be used early in U-Boot" 32 depends on TIMER 33 # initr_bootstage() requires a timer and is called before initr_dm() 34 # so only the early timer is available 35 default y if X86 && BOOTSTAGE 36 help 37 In some cases the timer must be accessible before driver model is 38 active. Examples include when using CONFIG_TRACE to trace U-Boot's 39 execution before driver model is set up. Enable this option to 40 use an early timer. These functions must be supported by your timer 41 driver: timer_early_get_count() and timer_early_get_rate(). 42 43config AG101P_TIMER 44 bool "AG101P timer support" 45 depends on TIMER && NDS32 46 help 47 Select this to enable a timer for AG01P devices. 48 49config ALTERA_TIMER 50 bool "Altera timer support" 51 depends on TIMER 52 help 53 Select this to enable a timer for Altera devices. Please find 54 details on the "Embedded Peripherals IP User Guide" of Altera. 55 56config ARC_TIMER 57 bool "ARC timer support" 58 depends on TIMER && ARC && CLK 59 help 60 Select this to enable built-in ARC timers. 61 ARC cores may have up to 2 built-in timers: timer0 and timer1, 62 usually at least one of them exists. Either of them is supported 63 in U-Boot. 64 65config AST_TIMER 66 bool "Aspeed ast2400/ast2500 timer support" 67 depends on TIMER 68 default y if ARCH_ASPEED 69 help 70 Select this to enable timer for Aspeed ast2400/ast2500 devices. 71 This is a simple sys timer driver, it is compatible with lib/time.c, 72 but does not support any interrupts. Even though SoC has 8 hardware 73 counters, they are all treated as a single device by this driver. 74 This is mostly because they all share several registers which 75 makes it difficult to completely separate them. 76 77config ATCPIT100_TIMER 78 bool "ATCPIT100 timer support" 79 depends on TIMER 80 help 81 Select this to enable a ATCPIT100 timer which will be embedded 82 in AE3XX, AE250 boards. 83 84config ATMEL_PIT_TIMER 85 bool "Atmel periodic interval timer support" 86 depends on TIMER 87 help 88 Select this to enable a periodic interval timer for Atmel devices, 89 it is designed to offer maximum accuracy and efficient management, 90 even for systems with long response time. 91 92config CADENCE_TTC_TIMER 93 bool "Cadence TTC (Triple Timer Counter)" 94 depends on TIMER 95 help 96 Enables support for the cadence ttc driver. This driver is present 97 on Xilinx Zynq and ZynqMP SoCs. 98 99config DESIGNWARE_APB_TIMER 100 bool "Designware APB Timer" 101 depends on TIMER 102 help 103 Enables support for the Designware APB Timer driver. This timer is 104 present on Altera SoCFPGA SoCs. 105 106config MPC83XX_TIMER 107 bool "MPC83xx timer support" 108 depends on TIMER 109 help 110 Select this to enable support for the timer found on 111 devices based on the MPC83xx family of SoCs. 112 113config RENESAS_OSTM_TIMER 114 bool "Renesas RZ/A1 R7S72100 OSTM Timer" 115 depends on TIMER 116 help 117 Enables support for the Renesas OSTM Timer driver. 118 This timer is present on Renesas RZ/A1 R7S72100 SoCs. 119 120config X86_TSC_TIMER_EARLY_FREQ 121 int "x86 TSC timer frequency in MHz when used as the early timer" 122 depends on X86_TSC_TIMER 123 default 1000 124 help 125 Sets the estimated CPU frequency in MHz when TSC is used as the 126 early timer and the frequency can neither be calibrated via some 127 hardware ways, nor got from device tree at the time when device 128 tree is not available yet. 129 130config OMAP_TIMER 131 bool "Omap timer support" 132 depends on TIMER 133 help 134 Select this to enable an timer for Omap devices. 135 136config RISCV_TIMER 137 bool "RISC-V timer support" 138 depends on TIMER && RISCV 139 help 140 Select this to enable support for the timer as defined 141 by the RISC-V privileged architecture spec. 142 143config ROCKCHIP_TIMER 144 bool "Rockchip timer support" 145 depends on TIMER 146 help 147 Select this to enable support for the timer found on 148 Rockchip devices. 149 150config SANDBOX_TIMER 151 bool "Sandbox timer support" 152 depends on SANDBOX && TIMER 153 help 154 Select this to enable an emulated timer for sandbox. It gets 155 time from host os. 156 157config STI_TIMER 158 bool "STi timer support" 159 depends on TIMER 160 default y if ARCH_STI 161 help 162 Select this to enable a timer for STi devices. 163 164config STM32_TIMER 165 bool "STM32 timer support" 166 depends on TIMER 167 help 168 Select this to enable support for the timer found on 169 STM32 devices. 170 171config X86_TSC_TIMER 172 bool "x86 Time-Stamp Counter (TSC) timer support" 173 depends on TIMER && X86 174 help 175 Select this to enable Time-Stamp Counter (TSC) timer for x86. 176 177config MTK_TIMER 178 bool "MediaTek timer support" 179 depends on TIMER 180 help 181 Select this to enable support for the timer found on 182 MediaTek devices. 183 184endmenu 185