Timestamps are directly accessed through a register read in the
interrupt handler. KSZ8463's logic to access it will be a bit more
complex because the same interrupt can be triggered by two different
timestamps being ready.

Wrap the timestamp's reading in a dedicated function to ease the
KSZ8463's integration in upcoming patches.

Signed-off-by: Bastien Curutchet (Schneider Electric) <bastien.curutchet@bootlin.com>
---
 drivers/net/dsa/microchip/ksz_ptp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c
index b3fff0643ea7a63aec924ec1cd9b451ecfeeab3d..4a2cc57a628f97bd51fcb11057bc4effda9205dd 100644
--- a/drivers/net/dsa/microchip/ksz_ptp.c
+++ b/drivers/net/dsa/microchip/ksz_ptp.c
@@ -967,6 +967,11 @@ void ksz_ptp_clock_unregister(struct dsa_switch *ds)
 		ptp_clock_unregister(ptp_data->clock);
 }
 
+static int ksz_read_ts(struct ksz_port *port, u16 reg, u32 *ts)
+{
+	return ksz_read32(port->ksz_dev, reg, ts);
+}
+
 static irqreturn_t ksz_ptp_msg_thread_fn(int irq, void *dev_id)
 {
 	struct ksz_ptp_irq *ptpmsg_irq = dev_id;
@@ -980,7 +985,7 @@ static irqreturn_t ksz_ptp_msg_thread_fn(int irq, void *dev_id)
 	dev = port->ksz_dev;
 
 	if (ptpmsg_irq->ts_en) {
-		ret = ksz_read32(dev, ptpmsg_irq->ts_reg, &tstamp_raw);
+		ret = ksz_read_ts(port, ptpmsg_irq->ts_reg, &tstamp_raw);
 		if (ret)
 			return IRQ_NONE;
 

-- 
2.52.0