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In some cases the timer must be accessible before driver model is active. Examples include when using CONFIG_TRACE to trace U-Boot's execution before driver model is set up. Enable this option to use an early timer. These functions must be supported by your timer driver: timer_early_get_count() and timer_early_get_rate(). Signed-off-by: Simon Glass <sjg@chromium.org>
50 lines
1.5 KiB
Plaintext
50 lines
1.5 KiB
Plaintext
menu "Timer Support"
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config TIMER
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bool "Enable driver model for timer drivers"
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depends on DM
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help
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Enable driver model for timer access. It uses the same API as
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lib/time.c, but now implemented by the uclass. The first timer
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will be used. The timer is usually a 32 bits free-running up
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counter. There may be no real tick, and no timer interrupt.
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config TIMER_EARLY
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bool "Allow timer to be used early in U-Boot"
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depends on TIMER
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help
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In some cases the timer must be accessible before driver model is
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active. Examples include when using CONFIG_TRACE to trace U-Boot's
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execution before driver model is set up. Enable this option to
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use an early timer. These functions must be supported by your timer
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driver: timer_early_get_count() and timer_early_get_rate().
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config ALTERA_TIMER
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bool "Altera timer support"
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depends on TIMER
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help
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Select this to enable a timer for Altera devices. Please find
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details on the "Embedded Peripherals IP User Guide" of Altera.
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config SANDBOX_TIMER
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bool "Sandbox timer support"
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depends on SANDBOX && TIMER
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help
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Select this to enable an emulated timer for sandbox. It gets
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time from host os.
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config X86_TSC_TIMER
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bool "x86 Time-Stamp Counter (TSC) timer support"
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depends on TIMER && X86
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default y if X86
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help
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Select this to enable Time-Stamp Counter (TSC) timer for x86.
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config OMAP_TIMER
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bool "Omap timer support"
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depends on TIMER
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help
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Select this to enable an timer for Omap devices.
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endmenu
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