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ARM: at91: Implement clocksource selection

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Allow selecting and unselecting the PIT clocksource driver so it doesn't
have to be compiled when unused.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Alexandre Belloni 2019-04-26 23:47:13 +02:00 committed by Daniel Lezcano
parent f712a1e8e5
commit 7803dc865b
1 changed files with 23 additions and 0 deletions
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arch/arm/mach-at91/Kconfig
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@ -107,6 +107,29 @@ config SOC_AT91SAM9
AT91SAM9X35
AT91SAM9XE
comment "Clocksource driver selection"
config ATMEL_CLOCKSOURCE_PIT
bool "Periodic Interval Timer (PIT) support"
depends on SOC_AT91SAM9 || SOC_SAMA5
default SOC_AT91SAM9 || SOC_SAMA5
select ATMEL_PIT
help
Select this to get a clocksource based on the Atmel Periodic Interval
Timer. It has a relatively low resolution and the TC Block clocksource
should be preferred.
config ATMEL_CLOCKSOURCE_TCB
bool "Timer Counter Blocks (TCB) support"
default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAMA5
select ATMEL_TCB_CLKSRC
help
Select this to get a high precision clocksource based on a
TC block with a 5+ MHz base clock rate.
On platforms with 16-bit counters, two timer channels are combined
to make a single 32-bit timer.
It can also be used as a clock event device supporting oneshot mode.
config HAVE_AT91_UTMI
bool