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| author | Paul Mundt <lethal@linux-sh.org> | 2012-07-20 16:42:59 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2012-07-20 16:42:59 +0900 |
| commit | 9ff561fdf73493d757bbc74aa58627e1381650fb (patch) | |
| tree | 4484d230662126b1ac94ea545ca5429c91e0a68b /drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c | |
| parent | 7b98cf0cf4e8798b9e7435f966ed0d90a2a925de (diff) | |
| parent | fdd85ec3eb8cc1b663678a3efa16ee59a32e0277 (diff) | |
| download | linux-9ff561fdf73493d757bbc74aa58627e1381650fb.tar.gz linux-9ff561fdf73493d757bbc74aa58627e1381650fb.tar.bz2 linux-9ff561fdf73493d757bbc74aa58627e1381650fb.zip | |
Merge branch 'common/pinctrl' into sh-latest
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c index ddc6a4d19302..dcebd128becf 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c @@ -708,6 +708,7 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter) { struct ixgbe_hw *hw = &adapter->hw; u32 incval = 0; + u32 timinca = 0; u32 shift = 0; u32 cycle_speed; unsigned long flags; @@ -730,8 +731,16 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter) break; } - /* Bail if the cycle speed didn't change */ - if (adapter->cycle_speed == cycle_speed) + /* + * grab the current TIMINCA value from the register so that it can be + * double checked. If the register value has been cleared, it must be + * reset to the correct value for generating a cyclecounter. If + * TIMINCA is zero, the SYSTIME registers do not increment at all. + */ + timinca = IXGBE_READ_REG(hw, IXGBE_TIMINCA); + + /* Bail if the cycle speed didn't change and TIMINCA is non-zero */ + if (adapter->cycle_speed == cycle_speed && timinca) return; /* disable the SDP clock out */ |