BMC/Intel-BMC/linux.git/drivers/clocksource/timer-imx-tpm.c, branch dev-4.17

clocksource/imx-tpm: Correct -ETIME return condition check

2018-04-19T11:21:35+00:00

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: 059ab7b82eec ("clocksource/drivers/imx-tpm: Add imx tpm timer support") Signed-off-by: Anson Huang Signed-off-by: Thomas Gleixner Acked-by: Dong Aisheng 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

clocksource/drivers/imx-tpm: Add different counter width support

2018-03-30T20:44:11+00:00

Different TPM modules have different width counters which is 16-bit or 32-bit, the counter width can be read from TPM_PARAM register bit[23:16], this patch adds dynamic check for counter width to support both 16-bit and 32-bit TPM modules. Signed-off-by: Anson Huang Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Correct some registers operation flow

2018-03-30T20:44:11+00:00

According to i.MX7ULP reference manual, TPM_SC_CPWMS can ONLY be written when counter is disabled, TPM_SC_TOF is write-1-clear, TPM_C0SC_CHF is also write-1-clear, correct these registers initialization flow; Signed-off-by: Anson Huang Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Fix typo of clock name

2018-03-30T20:44:10+00:00

The clock name should be ipg instead of igp. Signed-off-by: Anson Huang Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Add imx tpm timer support

2017-08-29T09:07:56+00:00

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