2 Commits

Author	SHA1	Message	Date
Anson Huang	fa8900e6a4	clocksource/imx-tpm: Correct -ETIME return condition check ... commit 7407188489 upstream. The additional brakects added to tpm_set_next_event's return value computation causes (int) forced type conversion NOT taking effect, and the incorrect value return will cause various system timer issue, like RCU stall etc.. Remove the additional brackets to make sure tpm_set_next_event always returns correct value. Fixes: 059ab7b82e ("clocksource/drivers/imx-tpm: Add imx tpm timer support") Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Dong Aisheng <Aisheng.dong@nxp.com> Cc: stable@vger.kernel.org Cc: daniel.lezcano@linaro.org Cc: Linux-imx@nxp.com Link: https://lkml.kernel.org/r/1524117883-2484-1-git-send-email-Anson.Huang@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2018-04-26 11:00:36 +02:00
Dong Aisheng	059ab7b82e	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>	2017-08-29 11:07:56 +02:00