In KSZ8463 register's layout, the offset between port 1 and port 2
registers isn't the same in the generic control register area than in
the PTP register area. The get_port_addr() always uses the same offset
so it doesn't work when it's used to access PTP registers.

Adapt the port offset in get_port_addr() when the accessed register is
in the PTP area.

Signed-off-by: Bastien Curutchet (Schneider Electric) <bastien.curutchet@bootlin.com>
---
 drivers/net/dsa/microchip/ksz8.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/dsa/microchip/ksz8.c b/drivers/net/dsa/microchip/ksz8.c
index c354abdafc1b542a32c276ef939a90db30c67f55..a05527899b8bab6d53509ba38c58101b79e98ee5 100644
--- a/drivers/net/dsa/microchip/ksz8.c
+++ b/drivers/net/dsa/microchip/ksz8.c
@@ -2020,6 +2020,9 @@ u32 ksz8_get_port_addr(int port, int offset)
 
 u32 ksz8463_get_port_addr(int port, int offset)
 {
+	if (offset >= KSZ8463_PTP_CLK_CTRL)
+		return offset + 0x20 * port;
+
 	return offset + 0x18 * port;
 }
 

-- 
2.52.0