diff options
| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-04-26 23:47:13 +0200 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2019-05-02 21:55:58 +0200 |
| commit | 7803dc865bd2963192c623546fb240d01e3e7aa0 (patch) | |
| tree | dd469391e630a8e9d4ce9b4f7ed7b3851c59c4a2 /arch/arm/mach-at91 | |
| parent | f712a1e8e59e8f42b5a9ec3887a4ad079bb18175 (diff) | |
ARM: at91: Implement clocksource selection
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>
Diffstat (limited to 'arch/arm/mach-at91')
| -rw-r--r-- | arch/arm/mach-at91/Kconfig | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig index 903f23c309df..da1d97a06c53 100644 --- a/arch/arm/mach-at91/Kconfig +++ b/arch/arm/mach-at91/Kconfig @@ -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 |