Instead of reading low and high of the mhi registers twice use 64 bit register value to avoid any time penality. Signed-off-by: Krishna Chaitanya Chundru --- drivers/bus/mhi/host/main.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index b7ceeb7261b708d46572d1f68dc277b6e1186b6e..f628198218ef9dc760bbfc3ec496603d1a45dfc1 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -1719,6 +1719,7 @@ static int mhi_get_remote_time(struct mhi_controller *mhi_cntrl, struct mhi_time struct mhi_timesync_info *time) { struct device *dev = &mhi_cntrl->mhi_dev->dev; + u64 val = U64_MAX; int ret, i; if (!mhi_tsync && !mhi_tsync->time_reg) { @@ -1756,15 +1757,25 @@ static int mhi_get_remote_time(struct mhi_controller *mhi_cntrl, struct mhi_time * transition to L0. */ for (i = 0; i < MHI_NUM_BACK_TO_BACK_READS; i++) { - ret = mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, - TSC_TIMESYNC_TIME_LOW_OFFSET, &time->t_dev_lo); + if (mhi_cntrl->read_reg64) { + ret = mhi_read_reg64(mhi_cntrl, mhi_tsync->time_reg, + TSC_TIMESYNC_TIME_LOW_OFFSET, &val); + } else { + ret = mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, + TSC_TIMESYNC_TIME_LOW_OFFSET, &time->t_dev_lo); - ret = mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, - TSC_TIMESYNC_TIME_HIGH_OFFSET, &time->t_dev_hi); + ret = mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, + TSC_TIMESYNC_TIME_HIGH_OFFSET, &time->t_dev_hi); + } } time->t_host_post = ktime_get_real(); + if (mhi_cntrl->read_reg64) { + time->t_dev_lo = (u32)val; + time->t_dev_hi = (u32)(val >> 32); + } + local_irq_enable(); preempt_enable(); -- 2.34.1