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"Das U-Boot" Source Tree
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 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
40config 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
53config ADI_SC5XX_TIMER
54 bool "ADI ADSP-SC5xx Timer Support"
55 depends on TIMER && (SC57X || SC58X || SC59X || SC59X_64)
56 help
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).
60
61config ALTERA_TIMER
62 bool "Altera timer support"
63 depends on TIMER
64 help
65 Select this to enable a timer for Altera devices. Please find
66 details on the "Embedded Peripherals IP User Guide" of Altera.
67
68config ANDES_PLMT_TIMER
69 bool
70 depends on RISCV_MMODE
71 help
72 The Andes PLMT block holds memory-mapped mtime register
73 associated with timer tick.
74
75config SPL_ANDES_PLMT_TIMER
76 bool
77 depends on SPL_RISCV_MMODE
78 help
79 The Andes PLMT block holds memory-mapped mtime register
80 associated with timer tick.
81
82config ARC_TIMER
83 bool "ARC timer support"
84 depends on TIMER && ARC && CLK
85 help
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
89 in U-Boot.
90
91config ARM_TWD_TIMER
92 bool "ARM timer watchdog (TWD) timer support"
93 depends on TIMER && CLK
94 help
95 Select this to enable support for the ARM global timer watchdog timer.
96
97config AST_TIMER
98 bool "Aspeed ast2400/ast2500 timer support"
99 depends on TIMER
100 default y if ARCH_ASPEED
101 help
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.
108
109config AST_IBEX_TIMER
110 bool "Aspeed ast2700 Ibex timer"
111 depends on TIMER
112 help
113 Select this to enable a timer support for the Ibex RV32-based MCUs in AST2700.
114
115config ATCPIT100_TIMER
116 bool "ATCPIT100 timer support"
117 depends on TIMER
118 help
119 Select this to enable a ATCPIT100 timer which will be embedded
120 in AE3XX, AE250 boards.
121
122config ATMEL_PIT_TIMER
123 bool "Atmel periodic interval timer support"
124 depends on TIMER
125 help
126 Select this to enable a periodic interval timer for Atmel devices,
127 it is designed to offer maximum accuracy and efficient management,
128 even for systems with long response time.
129
130config SPL_ATMEL_PIT_TIMER
131 bool "Atmel periodic interval timer support in SPL"
132 depends on SPL_TIMER
133 help
134 Select this to enable a periodic interval timer for Atmel devices,
135 it is designed to offer maximum accuracy and efficient management,
136 even for systems with long response time.
137 Select this to be available in SPL.
138
139config ATMEL_TCB_TIMER
140 bool "Atmel timer counter support"
141 depends on TIMER
142 depends on ARCH_AT91
143 help
144 Select this to enable the use of the timer counter as a monotonic
145 counter.
146
147config SPL_ATMEL_TCB_TIMER
148 bool "Atmel timer counter support in SPL"
149 depends on SPL_TIMER
150 depends on ARCH_AT91
151 help
152 Select this to enable the use of the timer counter as a monotonic
153 counter in SPL.
154
155config CADENCE_TTC_TIMER
156 bool "Cadence TTC (Triple Timer Counter)"
157 depends on TIMER
158 help
159 Enables support for the cadence ttc driver. This driver is present
160 on Xilinx Zynq and ZynqMP SoCs.
161
162config DESIGNWARE_APB_TIMER
163 bool "Designware APB Timer"
164 depends on TIMER
165 help
166 Enables support for the Designware APB Timer driver. This timer is
167 present on Altera SoCFPGA SoCs.
168
169config FTTMR010_TIMER
170 bool "Faraday Technology timer support"
171 depends on TIMER
172 help
173 Select this to enable support for the timer found on
174 devices using Faraday Technology's IP.
175
176config GXP_TIMER
177 bool "HPE GXP Timer"
178 depends on TIMER
179 help
180 Enables support for the GXP Timer driver. This timer is
181 present on HPE GXP SoCs.
182
183config MPC83XX_TIMER
184 bool "MPC83xx timer support"
185 depends on TIMER
186 help
187 Select this to enable support for the timer found on
188 devices based on the MPC83xx family of SoCs.
189
190config RENESAS_OSTM_TIMER
191 bool "Renesas RZ/A1 R7S72100 OSTM Timer"
192 depends on TIMER
193 help
194 Enables support for the Renesas OSTM Timer driver.
195 This timer is present on Renesas RZ/A1 R7S72100 SoCs.
196
197config X86_TSC_TIMER_FREQ
198 int "x86 TSC timer frequency in Hz"
199 depends on X86_TSC_TIMER
200 default 1000000000
201 help
202 Sets the estimated CPU frequency in Hz when TSC is used as the
203 early timer and the frequency can neither be calibrated via some
204 hardware ways, nor got from device tree at the time when device
205 tree is not available yet.
206
207config NOMADIK_MTU_TIMER
208 bool "Nomadik MTU Timer"
209 depends on TIMER
210 help
211 Enables support for the Nomadik Multi Timer Unit (MTU),
212 used in ST-Ericsson Ux500 SoCs.
213 The MTU provides 4 decrementing free-running timers.
214 At the moment, only the first timer is used by the driver.
215
216config NPCM_TIMER
217 bool "Nuvoton NPCM timer support"
218 depends on TIMER
219 help
220 Select this to enable a timer on Nuvoton NPCM SoCs.
221 NPCM timer module has 5 down-counting timers, only the first timer
222 is used to implement timer ops. No support for early timer and
223 boot timer.
224
225config OMAP_TIMER
226 bool "Omap timer support"
227 depends on TIMER
228 help
229 Select this to enable an timer for Omap devices.
230
231config ORION_TIMER
232 bool "Orion timer support"
233 depends on TIMER
234 default y if ARCH_KIRKWOOD || (ARCH_MVEBU && ARMADA_32BIT)
235 select TIMER_EARLY if ARCH_MVEBU
236 help
237 Select this to enable an timer for Orion and Armada devices
238 like Armada XP etc.
239
240config RISCV_TIMER
241 bool "RISC-V timer support"
242 depends on TIMER && RISCV
243 help
244 Select this to enable support for a generic RISC-V S-Mode timer
245 driver.
246
247config ROCKCHIP_TIMER
248 bool "Rockchip timer support"
249 depends on TIMER
250 help
251 Select this to enable support for the timer found on
252 Rockchip devices.
253
254config SANDBOX_TIMER
255 bool "Sandbox timer support"
256 depends on SANDBOX && TIMER
257 help
258 Select this to enable an emulated timer for sandbox. It gets
259 time from host os.
260
261config ARM_GLOBAL_TIMER
262 bool "ARM Cortex A9 global timer support"
263 depends on TIMER
264 depends on ARM
265 default y if ARCH_STI
266 help
267 Select this to enable global timer found on ARM Cortex A9
268 based devices.
269
270config SP804_TIMER
271 bool "ARM SP804 timer support"
272 depends on TIMER
273 help
274 ARM SP804 dual timer IP support
275
276config STM32_TIMER
277 bool "STM32 timer support"
278 depends on TIMER
279 help
280 Select this to enable support for the timer found on
281 STM32 devices.
282
283config TEGRA_TIMER
284 bool "Tegra timer support"
285 depends on TIMER
286 select TIMER_EARLY
287 help
288 Select this to enable support for the timer found on
289 Tegra devices.
290
291config X86_TSC_TIMER
292 bool "x86 Time-Stamp Counter (TSC) timer support"
293 depends on TIMER && X86
294 help
295 Select this to enable Time-Stamp Counter (TSC) timer for x86.
296
297config X86_TSC_READ_BASE
298 bool "Read the TSC timer base on start-up"
299 depends on X86_TSC_TIMER
300 help
301 On x86 platforms the TSC timer tick starts at the value 0 on reset.
302 This it makes no sense to read the timer on boot and use that as the
303 base, since we will miss some time taken to load U-Boot, etc. This
304 delay is controlled by the SoC and we cannot reduce it, but for
305 bootstage we want to record the time since reset as accurately as
306 possible.
307
308 The only exception is when U-Boot is used as a secondary bootloader,
309 where this option should be enabled.
310
311config TPL_X86_TSC_TIMER_NATIVE
312 bool "x86 TSC timer uses native calibration"
313 depends on TPL && X86_TSC_TIMER
314 help
315 Selects native timer calibration for TPL and don't include the other
316 methods in the code. This helps to reduce code size in TPL and works
317 on fairly modern Intel chips. Code-size reductions is about 700
318 bytes.
319
320config MTK_TIMER
321 bool "MediaTek timer support"
322 depends on TIMER
323 help
324 Select this to enable support for the timer found on
325 MediaTek devices.
326
327config MCHP_PIT64B_TIMER
328 bool "Microchip 64-bit periodic interval timer support"
329 depends on TIMER
330 help
331 Select this to enable support for Microchip 64-bit periodic
332 interval timer.
333
334config IMX_GPT_TIMER
335 bool "NXP i.MX GPT timer support"
336 depends on TIMER
337 help
338 Select this to enable support for the timer found on
339 NXP i.MX devices.
340
341config XILINX_TIMER
342 bool "Xilinx timer support"
343 depends on TIMER
344 select REGMAP
345 select SPL_REGMAP if SPL
346 help
347 Select this to enable support for the timer found on
348 any Xilinx boards (axi timer).
349
350config STARFIVE_TIMER
351 bool "Starfive timer support"
352 depends on TIMER
353 help
354 Select this to enable support for the timer found on
355 Starfive SoC.
356
357endmenu