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authorAlexandre Belloni <alexandre.belloni@bootlin.com>2019-04-26 23:47:13 +0200
committerDaniel Lezcano <daniel.lezcano@linaro.org>2019-05-02 21:55:58 +0200
commit7803dc865bd2963192c623546fb240d01e3e7aa0 (patch)
treedd469391e630a8e9d4ce9b4f7ed7b3851c59c4a2 /arch/arm/mach-at91
parentclocksource/drivers/tcb_clksrc: Use tcb as sched_clock (diff)
downloadlinux-7803dc865bd2963192c623546fb240d01e3e7aa0.tar.xz
linux-7803dc865bd2963192c623546fb240d01e3e7aa0.zip
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/Kconfig23
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