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 X86_TSC_TIMER_EARLY_FREQ 114 int "x86 TSC timer frequency in MHz when used as the early timer" 115 depends on X86_TSC_TIMER 116 default 1000 117 help 118 Sets the estimated CPU frequency in MHz when TSC is used as the 119 early timer and the frequency can neither be calibrated via some 120 hardware ways, nor got from device tree at the time when device 121 tree is not available yet. 122 123config OMAP_TIMER 124 bool "Omap timer support" 125 depends on TIMER 126 help 127 Select this to enable an timer for Omap devices. 128 129config RISCV_TIMER 130 bool "RISC-V timer support" 131 depends on TIMER && RISCV 132 help 133 Select this to enable support for the timer as defined 134 by the RISC-V privileged architecture spec. 135 136config ROCKCHIP_TIMER 137 bool "Rockchip timer support" 138 depends on TIMER 139 help 140 Select this to enable support for the timer found on 141 Rockchip devices. 142 143config SANDBOX_TIMER 144 bool "Sandbox timer support" 145 depends on SANDBOX && TIMER 146 help 147 Select this to enable an emulated timer for sandbox. It gets 148 time from host os. 149 150config STI_TIMER 151 bool "STi timer support" 152 depends on TIMER 153 default y if ARCH_STI 154 help 155 Select this to enable a timer for STi devices. 156 157config STM32_TIMER 158 bool "STM32 timer support" 159 depends on TIMER 160 help 161 Select this to enable support for the timer found on 162 STM32 devices. 163 164config X86_TSC_TIMER 165 bool "x86 Time-Stamp Counter (TSC) timer support" 166 depends on TIMER && X86 167 help 168 Select this to enable Time-Stamp Counter (TSC) timer for x86. 169 170config MTK_TIMER 171 bool "MediaTek timer support" 172 depends on TIMER 173 help 174 Select this to enable support for the timer found on 175 MediaTek devices. 176 177endmenu 178