diff options
| author | Dong Aisheng | 2017-08-01 10:40:17 +0200 |
|---|---|---|
| committer | Daniel Lezcano | 2017-08-29 11:07:56 +0200 |
| commit | 059ab7b82eecfc23bc58c491d72ee6b424163578 (patch) | |
| tree | adf2612e76cf6331fae6abb7ccab324808941a80 /drivers/clocksource/Kconfig | |
| parent | dt-bindings: timer: Add nxp tpm timer binding doc (diff) | |
| download | kernel-qcow2-linux-059ab7b82eecfc23bc58c491d72ee6b424163578.tar.gz kernel-qcow2-linux-059ab7b82eecfc23bc58c491d72ee6b424163578.tar.xz kernel-qcow2-linux-059ab7b82eecfc23bc58c491d72ee6b424163578.zip | |
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/Kconfig | 8 |
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 |