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 OMAP_TIMER 86 bool "Omap timer support" 87 depends on TIMER 88 help 89 Select this to enable an timer for Omap devices. 90 91config AST_TIMER 92 bool "Aspeed ast2400/ast2500 timer support" 93 depends on TIMER 94 default y if ARCH_ASPEED 95 help 96 Select this to enable timer for Aspeed ast2400/ast2500 devices. 97 This is a simple sys timer driver, it is compatible with lib/time.c, 98 but does not support any interrupts. Even though SoC has 8 hardware 99 counters, they are all treated as a single device by this driver. 100 This is mostly because they all share several registers which 101 makes it difficult to completely separate them. 102 103config STI_TIMER 104 bool "STi timer support" 105 depends on TIMER 106 default y if ARCH_STI 107 help 108 Select this to enable a timer for STi devices. 109 110config ARC_TIMER 111 bool "ARC timer support" 112 depends on TIMER && ARC && CLK 113 help 114 Select this to enable built-in ARC timers. 115 ARC cores may have up to 2 built-in timers: timer0 and timer1, 116 usually at least one of them exists. Either of them is supported 117 in U-Boot. 118 119config AG101P_TIMER 120 bool "AG101P timer support" 121 depends on TIMER && NDS32 122 help 123 Select this to enable a timer for AG01P devices. 124 125config ATCPIT100_TIMER 126 bool "ATCPIT100 timer support" 127 depends on TIMER 128 help 129 Select this to enable a ATCPIT100 timer which will be embeded 130 in AE3XX, AE250 boards. 131 132config ROCKCHIP_TIMER 133 bool "Rockchip timer support" 134 depends on TIMER 135 help 136 Select this to enable support for the timer found on 137 Rockchip devices. 138 139config STM32_TIMER 140 bool "STM32 timer support" 141 depends on TIMER 142 help 143 Select this to enable support for the timer found on 144 STM32 devices. 145 146config MPC83XX_TIMER 147 bool "MPC83xx timer support" 148 depends on TIMER 149 help 150 Select this to enable support for the timer found on 151 devices based on the MPC83xx family of SoCs. 152 153endmenu 154