menu "Timer Support" config TIMER bool "Enable driver model for timer drivers" depends on DM help Enable driver model for timer access. It uses the same API as lib/time.c, but now implemented by the uclass. The first timer will be used. The timer is usually a 32 bits free-running up counter. There may be no real tick, and no timer interrupt. config SPL_TIMER bool "Enable driver model for timer drivers in SPL" depends on TIMER && SPL help Enable support for timer drivers in SPL. These can be used to get a timer value when in SPL, or perhaps for implementing a delay function. This enables the drivers in drivers/timer as part of an SPL build. config TPL_TIMER bool "Enable driver model for timer drivers in TPL" depends on TIMER && TPL help Enable support for timer drivers in TPL. These can be used to get a timer value when in TPL, or perhaps for implementing a delay function. This enables the drivers in drivers/timer as part of an TPL build. config TIMER_EARLY bool "Allow timer to be used early in U-Boot" depends on TIMER # initr_bootstage() requires a timer and is called before initr_dm() # so only the early timer is available default y if X86 && BOOTSTAGE help In some cases the timer must be accessible before driver model is active. Examples include when using CONFIG_TRACE to trace U-Boot's execution before driver model is set up. Enable this option to use an early timer. These functions must be supported by your timer driver: timer_early_get_count() and timer_early_get_rate(). config AG101P_TIMER bool "AG101P timer support" depends on TIMER && NDS32 help Select this to enable a timer for AG01P devices. config ALTERA_TIMER bool "Altera timer support" depends on TIMER help Select this to enable a timer for Altera devices. Please find details on the "Embedded Peripherals IP User Guide" of Altera. config ARC_TIMER bool "ARC timer support" depends on TIMER && ARC && CLK help Select this to enable built-in ARC timers. ARC cores may have up to 2 built-in timers: timer0 and timer1, usually at least one of them exists. Either of them is supported in U-Boot. config AST_TIMER bool "Aspeed ast2400/ast2500 timer support" depends on TIMER default y if ARCH_ASPEED help Select this to enable timer for Aspeed ast2400/ast2500 devices. This is a simple sys timer driver, it is compatible with lib/time.c, but does not support any interrupts. Even though SoC has 8 hardware counters, they are all treated as a single device by this driver. This is mostly because they all share several registers which makes it difficult to completely separate them. config ATCPIT100_TIMER bool "ATCPIT100 timer support" depends on TIMER help Select this to enable a ATCPIT100 timer which will be embedded in AE3XX, AE250 boards. config ATMEL_PIT_TIMER bool "Atmel periodic interval timer support" depends on TIMER help Select this to enable a periodic interval timer for Atmel devices, it is designed to offer maximum accuracy and efficient management, even for systems with long response time. config CADENCE_TTC_TIMER bool "Cadence TTC (Triple Timer Counter)" depends on TIMER help Enables support for the cadence ttc driver. This driver is present on Xilinx Zynq and ZynqMP SoCs. config DESIGNWARE_APB_TIMER bool "Designware APB Timer" depends on TIMER help Enables support for the Designware APB Timer driver. This timer is present on Altera SoCFPGA SoCs. config MPC83XX_TIMER bool "MPC83xx timer support" depends on TIMER help Select this to enable support for the timer found on devices based on the MPC83xx family of SoCs. config RENESAS_OSTM_TIMER bool "Renesas RZ/A1 R7S72100 OSTM Timer" depends on TIMER help Enables support for the Renesas OSTM Timer driver. This timer is present on Renesas RZ/A1 R7S72100 SoCs. config X86_TSC_TIMER_EARLY_FREQ int "x86 TSC timer frequency in MHz when used as the early timer" depends on X86_TSC_TIMER default 1000 help Sets the estimated CPU frequency in MHz when TSC is used as the early timer and the frequency can neither be calibrated via some hardware ways, nor got from device tree at the time when device tree is not available yet. config OMAP_TIMER bool "Omap timer support" depends on TIMER help Select this to enable an timer for Omap devices. config RISCV_TIMER bool "RISC-V timer support" depends on TIMER && RISCV help Select this to enable support for the timer as defined by the RISC-V privileged architecture spec. config ROCKCHIP_TIMER bool "Rockchip timer support" depends on TIMER help Select this to enable support for the timer found on Rockchip devices. config SANDBOX_TIMER bool "Sandbox timer support" depends on SANDBOX && TIMER help Select this to enable an emulated timer for sandbox. It gets time from host os. config STI_TIMER bool "STi timer support" depends on TIMER default y if ARCH_STI help Select this to enable a timer for STi devices. config STM32_TIMER bool "STM32 timer support" depends on TIMER help Select this to enable support for the timer found on STM32 devices. config X86_TSC_TIMER bool "x86 Time-Stamp Counter (TSC) timer support" depends on TIMER && X86 help Select this to enable Time-Stamp Counter (TSC) timer for x86. config X86_TSC_READ_BASE bool "Read the TSC timer base on start-up" depends on X86_TSC_TIMER help On x86 platforms the TSC timer tick starts at the value 0 on reset. This it makes no sense to read the timer on boot and use that as the base, since we will miss some time taken to load U-Boot, etc. This delay is controlled by the SoC and we cannot reduce it, but for bootstage we want to record the time since reset as accurately as possible. The only exception is when U-Boot is used as a secondary bootloader, where this option should be enabled. config MTK_TIMER bool "MediaTek timer support" depends on TIMER help Select this to enable support for the timer found on MediaTek devices. endmenu