diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c
index 84c799959aaa..1889698691e9 100644
--- a/drivers/net/dsa/microchip/ksz_ptp.c
+++ b/drivers/net/dsa/microchip/ksz_ptp.c
@@ -86,7 +86,7 @@ static int ksz_ptp_tou_reset(struct ksz_device *dev, u8 unit)
 			 0);
 }
 
-static int ksz_ptp_tou_pulse_verify(u64 pulse_ns)
+static int ksz_ptp_tou_pulse_verify(u64 pulse_ns, u32 mask)
 {
 	u32 data;
 
@@ -94,7 +94,7 @@ static int ksz_ptp_tou_pulse_verify(u64 pulse_ns)
 		return -EINVAL;
 
 	data = (pulse_ns / 8);
-	if (!FIELD_FIT(TRIG_PULSE_WIDTH_M, data))
+	if ((mask & data) != data)
 		return -ERANGE;
 
 	return 0;
@@ -242,7 +242,7 @@ static int ksz_ptp_enable_perout(struct ksz_device *dev,
 				       KSZ_MAX_PULSE_WIDTH);
 	}
 
-	ret = ksz_ptp_tou_pulse_verify(pulse_width_ns);
+	ret = ksz_ptp_tou_pulse_verify(pulse_width_ns, TRIG_PULSE_WIDTH_M);
 	if (ret)
 		return ret;