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Diffstat (limited to 'drivers/net/dsa/mv88e6xxx/ptp.c')
-rw-r--r--drivers/net/dsa/mv88e6xxx/ptp.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/ptp.c b/drivers/net/dsa/mv88e6xxx/ptp.c
index 073cbd0bb91b..d838c174dc0d 100644
--- a/drivers/net/dsa/mv88e6xxx/ptp.c
+++ b/drivers/net/dsa/mv88e6xxx/ptp.c
@@ -273,6 +273,19 @@ static int mv88e6352_ptp_enable_extts(struct mv88e6xxx_chip *chip,
int pin;
int err;
+ /* Reject requests with unsupported flags */
+ if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
+ PTP_RISING_EDGE |
+ PTP_FALLING_EDGE |
+ PTP_STRICT_FLAGS))
+ return -EOPNOTSUPP;
+
+ /* Reject requests to enable time stamping on both edges. */
+ if ((rq->extts.flags & PTP_STRICT_FLAGS) &&
+ (rq->extts.flags & PTP_ENABLE_FEATURE) &&
+ (rq->extts.flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES)
+ return -EOPNOTSUPP;
+
pin = ptp_find_pin(chip->ptp_clock, PTP_PF_EXTTS, rq->extts.index);
if (pin < 0)