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 ALTERA_TIMER 44 bool "Altera timer support" 45 depends on TIMER 46 help 47 Select this to enable a timer for Altera devices. Please find 48 details on the "Embedded Peripherals IP User Guide" of Altera. 49 50config ATMEL_PIT_TIMER 51 bool "Atmel periodic interval timer support" 52 depends on TIMER 53 help 54 Select this to enable a periodic interval timer for Atmel devices, 55 it is designed to offer maximum accuracy and efficient management, 56 even for systems with long response time. 57 58config CADENCE_TTC_TIMER 59 bool "Cadence TTC (Triple Timer Counter)" 60 depends on TIMER 61 help 62 Enables support for the cadence ttc driver. This driver is present 63 on Xilinx Zynq and ZynqMP SoCs. 64 65config DESIGNWARE_APB_TIMER 66 bool "Designware APB Timer" 67 depends on TIMER 68 help 69 Enables support for the Designware APB Timer driver. This timer is 70 present on Altera SoCFPGA SoCs. 71 72config SANDBOX_TIMER 73 bool "Sandbox timer support" 74 depends on SANDBOX && TIMER 75 help 76 Select this to enable an emulated timer for sandbox. It gets 77 time from host os. 78 79config X86_TSC_TIMER 80 bool "x86 Time-Stamp Counter (TSC) timer support" 81 depends on TIMER && X86 82 help 83 Select this to enable Time-Stamp Counter (TSC) timer for x86. 84 85config X86_TSC_TIMER_EARLY_FREQ 86 int "x86 TSC timer frequency in MHz when used as the early timer" 87 depends on X86_TSC_TIMER 88 default 1000 89 help 90 Sets the estimated CPU frequency in MHz when TSC is used as the 91 early timer and the frequency can neither be calibrated via some 92 hardware ways, nor got from device tree at the time when device 93 tree is not available yet. 94 95config OMAP_TIMER 96 bool "Omap timer support" 97 depends on TIMER 98 help 99 Select this to enable an timer for Omap devices. 100 101config AST_TIMER 102 bool "Aspeed ast2400/ast2500 timer support" 103 depends on TIMER 104 default y if ARCH_ASPEED 105 help 106 Select this to enable timer for Aspeed ast2400/ast2500 devices. 107 This is a simple sys timer driver, it is compatible with lib/time.c, 108 but does not support any interrupts. Even though SoC has 8 hardware 109 counters, they are all treated as a single device by this driver. 110 This is mostly because they all share several registers which 111 makes it difficult to completely separate them. 112 113config STI_TIMER 114 bool "STi timer support" 115 depends on TIMER 116 default y if ARCH_STI 117 help 118 Select this to enable a timer for STi devices. 119 120config ARC_TIMER 121 bool "ARC timer support" 122 depends on TIMER && ARC && CLK 123 help 124 Select this to enable built-in ARC timers. 125 ARC cores may have up to 2 built-in timers: timer0 and timer1, 126 usually at least one of them exists. Either of them is supported 127 in U-Boot. 128 129config AG101P_TIMER 130 bool "AG101P timer support" 131 depends on TIMER && NDS32 132 help 133 Select this to enable a timer for AG01P devices. 134 135config ATCPIT100_TIMER 136 bool "ATCPIT100 timer support" 137 depends on TIMER 138 help 139 Select this to enable a ATCPIT100 timer which will be embeded 140 in AE3XX, AE250 boards. 141 142config ROCKCHIP_TIMER 143 bool "Rockchip timer support" 144 depends on TIMER 145 help 146 Select this to enable support for the timer found on 147 Rockchip devices. 148 149config STM32_TIMER 150 bool "STM32 timer support" 151 depends on TIMER 152 help 153 Select this to enable support for the timer found on 154 STM32 devices. 155 156config MPC83XX_TIMER 157 bool "MPC83xx timer support" 158 depends on TIMER 159 help 160 Select this to enable support for the timer found on 161 devices based on the MPC83xx family of SoCs. 162 163endmenu 164