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
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
Enables support for the Designware APB Timer driver. This timer is
present on Altera SoCFPGA SoCs.
-config SANDBOX_TIMER
- bool "Sandbox timer support"
- depends on SANDBOX && TIMER
+config MPC83XX_TIMER
+ bool "MPC83xx timer support"
+ depends on TIMER
help
- Select this to enable an emulated timer for sandbox. It gets
- time from host os.
+ Select this to enable support for the timer found on
+ devices based on the MPC83xx family of SoCs.
-config X86_TSC_TIMER
- bool "x86 Time-Stamp Counter (TSC) timer support"
- depends on TIMER && X86
+config RENESAS_OSTM_TIMER
+ bool "Renesas RZ/A1 R7S72100 OSTM Timer"
+ depends on TIMER
help
- Select this to enable Time-Stamp Counter (TSC) timer for x86.
+ 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"
hardware ways, nor got from device tree at the time when device
tree is not available yet.
+config NOMADIK_MTU_TIMER
+ bool "Nomadik MTU Timer"
+ depends on TIMER
+ help
+ Enables support for the Nomadik Multi Timer Unit (MTU),
+ used in ST-Ericsson Ux500 SoCs.
+ The MTU provides 4 decrementing free-running timers.
+ At the moment, only the first timer is used by the driver.
+
config OMAP_TIMER
bool "Omap timer support"
depends on TIMER
help
Select this to enable an timer for Omap devices.
-config AST_TIMER
- bool "Aspeed ast2400/ast2500 timer support"
+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
- 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.
+ 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"
help
Select this to enable a timer for STi devices.
-config ARC_TIMER
- bool "ARC timer support"
- depends on TIMER && ARC && CLK
+config STM32_TIMER
+ bool "STM32 timer support"
+ depends on TIMER
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.
+ Select this to enable support for the timer found on
+ STM32 devices.
-config AG101P_TIMER
- bool "AG101P timer support"
- depends on TIMER && NDS32
+config X86_TSC_TIMER
+ bool "x86 Time-Stamp Counter (TSC) timer support"
+ depends on TIMER && X86
help
- Select this to enable a timer for AG01P devices.
+ Select this to enable Time-Stamp Counter (TSC) timer for x86.
-config ATCPIT100_TIMER
- bool "ATCPIT100 timer support"
- depends on TIMER
+config X86_TSC_READ_BASE
+ bool "Read the TSC timer base on start-up"
+ depends on X86_TSC_TIMER
help
- Select this to enable a ATCPIT100 timer which will be embeded
- in AE3XX, AE250 boards.
+ 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.
-config ROCKCHIP_TIMER
- bool "Rockchip timer support"
- depends on TIMER
- help
- Select this to enable support for the timer found on
- Rockchip devices.
+ The only exception is when U-Boot is used as a secondary bootloader,
+ where this option should be enabled.
-config STM32_TIMER
- bool "STM32 timer support"
- depends on TIMER
+config TPL_X86_TSC_TIMER_NATIVE
+ bool "x86 TSC timer uses native calibration"
+ depends on TPL && X86_TSC_TIMER
help
- Select this to enable support for the timer found on
- STM32 devices.
+ Selects native timer calibration for TPL and don't include the other
+ methods in the code. This helps to reduce code size in TPL and works
+ on fairly modern Intel chips. Code-size reductions is about 700
+ bytes.
-config MPC83XX_TIMER
- bool "MPC83xx timer support"
+config MTK_TIMER
+ bool "MediaTek timer support"
depends on TIMER
help
Select this to enable support for the timer found on
- devices based on the MPC83xx family of SoCs.
+ MediaTek devices.
endmenu