4 bool "Enable driver model for timer drivers"
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.
13 bool "Enable driver model for timer drivers in SPL"
14 depends on TIMER && SPL
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
22 bool "Enable driver model for timer drivers in TPL"
23 depends on TIMER && TPL
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
31 bool "Enable driver model for timer drivers in VPL"
32 depends on TIMER && VPL
33 default y if TPL_TIMER
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
41 bool "Allow timer to be used early in U-Boot"
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
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().
53 config ADI_SC5XX_TIMER
54 bool "ADI ADSP-SC5xx Timer Support"
55 depends on TIMER && (SC57X || SC58X || SC59X || SC59X_64)
57 gptimer based timer support on ADI's ADSP-SC5xx platforms. Available
58 but not required on sc59x-64-based platforms (598 and similar).
59 Required on 32-bit platforms (sc57x, sc58x, sc594 and earlier).
62 bool "Altera timer support"
65 Select this to enable a timer for Altera devices. Please find
66 details on the "Embedded Peripherals IP User Guide" of Altera.
68 config ANDES_PLMT_TIMER
70 depends on RISCV_MMODE
72 The Andes PLMT block holds memory-mapped mtime register
73 associated with timer tick.
75 config SPL_ANDES_PLMT_TIMER
77 depends on SPL_RISCV_MMODE
79 The Andes PLMT block holds memory-mapped mtime register
80 associated with timer tick.
83 bool "ARC timer support"
84 depends on TIMER && ARC && CLK
86 Select this to enable built-in ARC timers.
87 ARC cores may have up to 2 built-in timers: timer0 and timer1,
88 usually at least one of them exists. Either of them is supported
92 bool "ARM timer watchdog (TWD) timer support"
93 depends on TIMER && CLK
95 Select this to enable support for the ARM global timer watchdog timer.
98 bool "Aspeed ast2400/ast2500 timer support"
100 default y if ARCH_ASPEED
102 Select this to enable timer for Aspeed ast2400/ast2500 devices.
103 This is a simple sys timer driver, it is compatible with lib/time.c,
104 but does not support any interrupts. Even though SoC has 8 hardware
105 counters, they are all treated as a single device by this driver.
106 This is mostly because they all share several registers which
107 makes it difficult to completely separate them.
109 config ATCPIT100_TIMER
110 bool "ATCPIT100 timer support"
113 Select this to enable a ATCPIT100 timer which will be embedded
114 in AE3XX, AE250 boards.
116 config ATMEL_PIT_TIMER
117 bool "Atmel periodic interval timer support"
120 Select this to enable a periodic interval timer for Atmel devices,
121 it is designed to offer maximum accuracy and efficient management,
122 even for systems with long response time.
124 config SPL_ATMEL_PIT_TIMER
125 bool "Atmel periodic interval timer support in SPL"
128 Select this to enable a periodic interval timer for Atmel devices,
129 it is designed to offer maximum accuracy and efficient management,
130 even for systems with long response time.
131 Select this to be available in SPL.
133 config ATMEL_TCB_TIMER
134 bool "Atmel timer counter support"
138 Select this to enable the use of the timer counter as a monotonic
141 config SPL_ATMEL_TCB_TIMER
142 bool "Atmel timer counter support in SPL"
146 Select this to enable the use of the timer counter as a monotonic
149 config CADENCE_TTC_TIMER
150 bool "Cadence TTC (Triple Timer Counter)"
153 Enables support for the cadence ttc driver. This driver is present
154 on Xilinx Zynq and ZynqMP SoCs.
156 config DESIGNWARE_APB_TIMER
157 bool "Designware APB Timer"
160 Enables support for the Designware APB Timer driver. This timer is
161 present on Altera SoCFPGA SoCs.
163 config FTTMR010_TIMER
164 bool "Faraday Technology timer support"
167 Select this to enable support for the timer found on
168 devices using Faraday Technology's IP.
174 Enables support for the GXP Timer driver. This timer is
175 present on HPE GXP SoCs.
178 bool "MPC83xx timer support"
181 Select this to enable support for the timer found on
182 devices based on the MPC83xx family of SoCs.
184 config RENESAS_OSTM_TIMER
185 bool "Renesas RZ/A1 R7S72100 OSTM Timer"
188 Enables support for the Renesas OSTM Timer driver.
189 This timer is present on Renesas RZ/A1 R7S72100 SoCs.
191 config X86_TSC_TIMER_FREQ
192 int "x86 TSC timer frequency in Hz"
193 depends on X86_TSC_TIMER
196 Sets the estimated CPU frequency in Hz when TSC is used as the
197 early timer and the frequency can neither be calibrated via some
198 hardware ways, nor got from device tree at the time when device
199 tree is not available yet.
201 config NOMADIK_MTU_TIMER
202 bool "Nomadik MTU Timer"
205 Enables support for the Nomadik Multi Timer Unit (MTU),
206 used in ST-Ericsson Ux500 SoCs.
207 The MTU provides 4 decrementing free-running timers.
208 At the moment, only the first timer is used by the driver.
211 bool "Nuvoton NPCM timer support"
214 Select this to enable a timer on Nuvoton NPCM SoCs.
215 NPCM timer module has 5 down-counting timers, only the first timer
216 is used to implement timer ops. No support for early timer and
220 bool "Omap timer support"
223 Select this to enable an timer for Omap devices.
226 bool "Orion timer support"
228 default y if ARCH_KIRKWOOD || (ARCH_MVEBU && ARMADA_32BIT)
229 select TIMER_EARLY if ARCH_MVEBU
231 Select this to enable an timer for Orion and Armada devices
235 bool "RISC-V timer support"
236 depends on TIMER && RISCV
238 Select this to enable support for a generic RISC-V S-Mode timer
241 config ROCKCHIP_TIMER
242 bool "Rockchip timer support"
245 Select this to enable support for the timer found on
249 bool "Sandbox timer support"
250 depends on SANDBOX && TIMER
252 Select this to enable an emulated timer for sandbox. It gets
255 config ARM_GLOBAL_TIMER
256 bool "ARM Cortex A9 global timer support"
259 default y if ARCH_STI
261 Select this to enable global timer found on ARM Cortex A9
265 bool "ARM SP804 timer support"
268 ARM SP804 dual timer IP support
271 bool "STM32 timer support"
274 Select this to enable support for the timer found on
278 bool "Tegra timer support"
282 Select this to enable support for the timer found on
286 bool "x86 Time-Stamp Counter (TSC) timer support"
287 depends on TIMER && X86
289 Select this to enable Time-Stamp Counter (TSC) timer for x86.
291 config X86_TSC_READ_BASE
292 bool "Read the TSC timer base on start-up"
293 depends on X86_TSC_TIMER
295 On x86 platforms the TSC timer tick starts at the value 0 on reset.
296 This it makes no sense to read the timer on boot and use that as the
297 base, since we will miss some time taken to load U-Boot, etc. This
298 delay is controlled by the SoC and we cannot reduce it, but for
299 bootstage we want to record the time since reset as accurately as
302 The only exception is when U-Boot is used as a secondary bootloader,
303 where this option should be enabled.
305 config TPL_X86_TSC_TIMER_NATIVE
306 bool "x86 TSC timer uses native calibration"
307 depends on TPL && X86_TSC_TIMER
309 Selects native timer calibration for TPL and don't include the other
310 methods in the code. This helps to reduce code size in TPL and works
311 on fairly modern Intel chips. Code-size reductions is about 700
315 bool "MediaTek timer support"
318 Select this to enable support for the timer found on
321 config MCHP_PIT64B_TIMER
322 bool "Microchip 64-bit periodic interval timer support"
325 Select this to enable support for Microchip 64-bit periodic
329 bool "NXP i.MX GPT timer support"
332 Select this to enable support for the timer found on
336 bool "Xilinx timer support"
339 select SPL_REGMAP if SPL
341 Select this to enable support for the timer found on
342 any Xilinx boards (axi timer).
344 config STARFIVE_TIMER
345 bool "Starfive timer support"
348 Select this to enable support for the timer found on