diff options
Diffstat (limited to 'drivers/net/ethernet/engleder/tsnep_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/engleder/tsnep_ptp.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/net/ethernet/engleder/tsnep_ptp.c b/drivers/net/ethernet/engleder/tsnep_ptp.c index eaad453d487e..54fbf0126815 100644 --- a/drivers/net/ethernet/engleder/tsnep_ptp.c +++ b/drivers/net/ethernet/engleder/tsnep_ptp.c @@ -175,6 +175,33 @@ static int tsnep_ptp_settime64(struct ptp_clock_info *ptp, return 0; } +static int tsnep_ptp_getcyclesx64(struct ptp_clock_info *ptp, + struct timespec64 *ts, + struct ptp_system_timestamp *sts) +{ + struct tsnep_adapter *adapter = container_of(ptp, struct tsnep_adapter, + ptp_clock_info); + u32 high_before; + u32 low; + u32 high; + u64 counter; + + /* read high dword twice to detect overrun */ + high = ioread32(adapter->addr + ECM_COUNTER_HIGH); + do { + ptp_read_system_prets(sts); + low = ioread32(adapter->addr + ECM_COUNTER_LOW); + ptp_read_system_postts(sts); + high_before = high; + high = ioread32(adapter->addr + ECM_COUNTER_HIGH); + } while (high != high_before); + counter = (((u64)high) << 32) | ((u64)low); + + *ts = ns_to_timespec64(counter); + + return 0; +} + int tsnep_ptp_init(struct tsnep_adapter *adapter) { int retval = 0; @@ -192,6 +219,7 @@ int tsnep_ptp_init(struct tsnep_adapter *adapter) adapter->ptp_clock_info.adjtime = tsnep_ptp_adjtime; adapter->ptp_clock_info.gettimex64 = tsnep_ptp_gettimex64; adapter->ptp_clock_info.settime64 = tsnep_ptp_settime64; + adapter->ptp_clock_info.getcyclesx64 = tsnep_ptp_getcyclesx64; spin_lock_init(&adapter->ptp_lock); |