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authorDong Aisheng <aisheng.dong@nxp.com>2017-08-01 11:40:17 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2017-08-29 12:07:56 +0300
commit059ab7b82eecfc23bc58c491d72ee6b424163578 (patch)
treeadf2612e76cf6331fae6abb7ccab324808941a80 /drivers/clocksource/Kconfig
parent34b0c26cd5458a991626bc8424e029562dceed21 (diff)
downloadlinux-059ab7b82eecfc23bc58c491d72ee6b424163578.tar.xz
clocksource/drivers/imx-tpm: Add imx tpm timer support
IMX Timer/PWM Module (TPM) supports both timer and pwm function while this patch only adds the timer support. PWM would be added later. The TPM counter, compare and capture registers are clocked by an asynchronous clock that can remain enabled in low power modes. NOTE: We observed in a very small probability, the bus fabric contention between GPU and A7 may results a few cycles delay of writing CNT registers which may cause the min_delta event got missed, so we need add a ETIME check here in case it happened. Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Anson Huang <Anson.Huang@nxp.com> Cc: Bai Ping <ping.bai@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource/Kconfig')
-rw-r--r--drivers/clocksource/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index fcae5ca6ac92..0a953fc45a0e 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -598,6 +598,14 @@ config CLKSRC_IMX_GPT
depends on ARM && CLKDEV_LOOKUP
select CLKSRC_MMIO
+config CLKSRC_IMX_TPM
+ bool "Clocksource using i.MX TPM" if COMPILE_TEST
+ depends on ARM && CLKDEV_LOOKUP && GENERIC_CLOCKEVENTS
+ select CLKSRC_MMIO
+ help
+ Enable this option to use IMX Timer/PWM Module (TPM) timer as
+ clocksource.
+
config CLKSRC_ST_LPC
bool "Low power clocksource found in the LPC" if COMPILE_TEST
select TIMER_OF if OF