drivers/timer/Kconfig

   1 menu "Timer Support"
   2
   3 config 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
  12 config 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
  21 config 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
  30 config VPL_TIMER
  31         bool "Enable driver model for timer drivers in VPL"
  32         depends on TIMER && VPL
  33         default y if TPL_TIMER
  34         help
  35           Enable support for timer drivers in VPL. These can be used to get
  36           a timer value when in VPL, or perhaps for implementing a delay
  37           function. This enables the drivers in drivers/timer as part of an
  38           TPL build.
  39
  40 config TIMER_EARLY
  41         bool "Allow timer to be used early in U-Boot"
  42         depends on TIMER
  43         # initr_bootstage() requires a timer and is called before initr_dm()
  44         # so only the early timer is available
  45         default y if X86 && BOOTSTAGE
  46         help
  47           In some cases the timer must be accessible before driver model is
  48           active. Examples include when using CONFIG_TRACE to trace U-Boot's
  49           execution before driver model is set up. Enable this option to
  50           use an early timer. These functions must be supported by your timer
  51           driver: timer_early_get_count() and timer_early_get_rate().
  52
  53 config ALTERA_TIMER
  54         bool "Altera timer support"
  55         depends on TIMER
  56         help
  57           Select this to enable a timer for Altera devices. Please find
  58           details on the "Embedded Peripherals IP User Guide" of Altera.
  59
  60 config ANDES_PLMT_TIMER
  61         bool
  62         depends on RISCV_MMODE || SPL_RISCV_MMODE
  63         help
  64           The Andes PLMT block holds memory-mapped mtime register
  65           associated with timer tick.
  66
  67 config ARC_TIMER
  68         bool "ARC timer support"
  69         depends on TIMER && ARC && CLK
  70         help
  71           Select this to enable built-in ARC timers.
  72           ARC cores may have up to 2 built-in timers: timer0 and timer1,
  73           usually at least one of them exists. Either of them is supported
  74           in U-Boot.
  75
  76 config AST_TIMER
  77         bool "Aspeed ast2400/ast2500 timer support"
  78         depends on TIMER
  79         default y if ARCH_ASPEED
  80         help
  81           Select this to enable timer for Aspeed ast2400/ast2500 devices.
  82           This is a simple sys timer driver, it is compatible with lib/time.c,
  83           but does not support any interrupts. Even though SoC has 8 hardware
  84           counters, they are all treated as a single device by this driver.
  85           This is mostly because they all share several registers which
  86           makes it difficult to completely separate them.
  87
  88 config ATCPIT100_TIMER
  89         bool "ATCPIT100 timer support"
  90         depends on TIMER
  91         help
  92           Select this to enable a ATCPIT100 timer which will be embedded
  93           in AE3XX, AE250 boards.
  94
  95 config ATMEL_PIT_TIMER
  96         bool "Atmel periodic interval timer support"
  97         depends on TIMER
  98         help
  99           Select this to enable a periodic interval timer for Atmel devices,
 100           it is designed to offer maximum accuracy and efficient management,
 101           even for systems with long response time.
 102
 103 config SPL_ATMEL_PIT_TIMER
 104         bool "Atmel periodic interval timer support in SPL"
 105         depends on SPL_TIMER
 106         help
 107           Select this to enable a periodic interval timer for Atmel devices,
 108           it is designed to offer maximum accuracy and efficient management,
 109           even for systems with long response time.
 110           Select this to be available in SPL.
 111
 112 config ATMEL_TCB_TIMER
 113         bool "Atmel timer counter support"
 114         depends on TIMER
 115         depends on ARCH_AT91
 116         help
 117           Select this to enable the use of the timer counter as a monotonic
 118           counter.
 119
 120 config SPL_ATMEL_TCB_TIMER
 121         bool "Atmel timer counter support in SPL"
 122         depends on SPL_TIMER
 123         depends on ARCH_AT91
 124         help
 125           Select this to enable the use of the timer counter as a monotonic
 126           counter in SPL.
 127
 128 config CADENCE_TTC_TIMER
 129         bool "Cadence TTC (Triple Timer Counter)"
 130         depends on TIMER
 131         help
 132           Enables support for the cadence ttc driver. This driver is present
 133           on Xilinx Zynq and ZynqMP SoCs.
 134
 135 config DESIGNWARE_APB_TIMER
 136         bool "Designware APB Timer"
 137         depends on TIMER
 138         help
 139           Enables support for the Designware APB Timer driver. This timer is
 140           present on Altera SoCFPGA SoCs.
 141
 142 config GXP_TIMER
 143         bool "HPE GXP Timer"
 144         depends on TIMER
 145         help
 146           Enables support for the GXP Timer driver. This timer is
 147           present on HPE GXP SoCs.
 148
 149 config MPC83XX_TIMER
 150         bool "MPC83xx timer support"
 151         depends on TIMER
 152         help
 153           Select this to enable support for the timer found on
 154           devices based on the MPC83xx family of SoCs.
 155
 156 config RENESAS_OSTM_TIMER
 157         bool "Renesas RZ/A1 R7S72100 OSTM Timer"
 158         depends on TIMER
 159         help
 160           Enables support for the Renesas OSTM Timer driver.
 161           This timer is present on Renesas RZ/A1 R7S72100 SoCs.
 162
 163 config X86_TSC_TIMER_FREQ
 164         int "x86 TSC timer frequency in Hz"
 165         depends on X86_TSC_TIMER
 166         default 1000000000
 167         help
 168           Sets the estimated CPU frequency in Hz when TSC is used as the
 169           early timer and the frequency can neither be calibrated via some
 170           hardware ways, nor got from device tree at the time when device
 171           tree is not available yet.
 172
 173 config NOMADIK_MTU_TIMER
 174         bool "Nomadik MTU Timer"
 175         depends on TIMER
 176         help
 177           Enables support for the Nomadik Multi Timer Unit (MTU),
 178           used in ST-Ericsson Ux500 SoCs.
 179           The MTU provides 4 decrementing free-running timers.
 180           At the moment, only the first timer is used by the driver.
 181
 182 config NPCM_TIMER
 183         bool "Nuvoton NPCM timer support"
 184         depends on TIMER
 185         help
 186           Select this to enable a timer on Nuvoton NPCM SoCs.
 187           NPCM timer module has 5 down-counting timers, only the first timer
 188           is used to implement timer ops. No support for early timer and
 189           boot timer.
 190
 191 config OMAP_TIMER
 192         bool "Omap timer support"
 193         depends on TIMER
 194         help
 195           Select this to enable an timer for Omap devices.
 196
 197 config RISCV_TIMER
 198         bool "RISC-V timer support"
 199         depends on TIMER && RISCV
 200         help
 201           Select this to enable support for a generic RISC-V S-Mode timer
 202           driver.
 203
 204 config ROCKCHIP_TIMER
 205         bool "Rockchip timer support"
 206         depends on TIMER
 207         help
 208           Select this to enable support for the timer found on
 209           Rockchip devices.
 210
 211 config SANDBOX_TIMER
 212         bool "Sandbox timer support"
 213         depends on SANDBOX && TIMER
 214         help
 215           Select this to enable an emulated timer for sandbox. It gets
 216           time from host os.
 217
 218 config STI_TIMER
 219         bool "STi timer support"
 220         depends on TIMER
 221         default y if ARCH_STI
 222         help
 223           Select this to enable a timer for STi devices.
 224
 225 config STM32_TIMER
 226         bool "STM32 timer support"
 227         depends on TIMER
 228         help
 229           Select this to enable support for the timer found on
 230           STM32 devices.
 231
 232 config X86_TSC_TIMER
 233         bool "x86 Time-Stamp Counter (TSC) timer support"
 234         depends on TIMER && X86
 235         help
 236           Select this to enable Time-Stamp Counter (TSC) timer for x86.
 237
 238 config X86_TSC_READ_BASE
 239         bool "Read the TSC timer base on start-up"
 240         depends on X86_TSC_TIMER
 241         help
 242           On x86 platforms the TSC timer tick starts at the value 0 on reset.
 243           This it makes no sense to read the timer on boot and use that as the
 244           base, since we will miss some time taken to load U-Boot, etc. This
 245           delay is controlled by the SoC and we cannot reduce it, but for
 246           bootstage we want to record the time since reset as accurately as
 247           possible.
 248
 249           The only exception is when U-Boot is used as a secondary bootloader,
 250           where this option should be enabled.
 251
 252 config TPL_X86_TSC_TIMER_NATIVE
 253         bool "x86 TSC timer uses native calibration"
 254         depends on TPL && X86_TSC_TIMER
 255         help
 256           Selects native timer calibration for TPL and don't include the other
 257           methods in the code. This helps to reduce code size in TPL and works
 258           on fairly modern Intel chips. Code-size reductions is about 700
 259           bytes.
 260
 261 config MTK_TIMER
 262         bool "MediaTek timer support"
 263         depends on TIMER
 264         help
 265           Select this to enable support for the timer found on
 266           MediaTek devices.
 267
 268 config MCHP_PIT64B_TIMER
 269         bool "Microchip 64-bit periodic interval timer support"
 270         depends on TIMER
 271         help
 272           Select this to enable support for Microchip 64-bit periodic
 273           interval timer.
 274
 275 config IMX_GPT_TIMER
 276         bool "NXP i.MX GPT timer support"
 277         depends on TIMER
 278         help
 279           Select this to enable support for the timer found on
 280           NXP i.MX devices.
 281
 282 config XILINX_TIMER
 283         bool "Xilinx timer support"
 284         depends on TIMER
 285         select REGMAP
 286         select SPL_REGMAP if SPL
 287         help
 288           Select this to enable support for the timer found on
 289           any Xilinx boards (axi timer).
 290
 291 endmenu