From 059ab7b82eecfc23bc58c491d72ee6b424163578 Mon Sep 17 00:00:00 2001 From: Dong Aisheng Date: Tue, 1 Aug 2017 16:40:17 +0800 Subject: 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 Cc: Arnd Bergmann Cc: Thomas Gleixner Cc: Shawn Guo Cc: Anson Huang Cc: Bai Ping Signed-off-by: Dong Aisheng Signed-off-by: Daniel Lezcano --- drivers/clocksource/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/clocksource/Kconfig') 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 -- cgit v1.2.3