[PATCH v3 net-next 07/10] net: dsa: microchip: add support for ethtool port counters

[Prasanna Vengateshan <prasanna.vengateshan@microchip.com>]

Reused the KSZ common APIs for get_ethtool_stats() & get_sset_count()
along with relevant lan937x hooks for KSZ common layer and added
support for get_strings()

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
---
 drivers/net/dsa/microchip/lan937x_main.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index 74b6c9563dc1..3380a4617725 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -43,6 +43,21 @@ static int lan937x_phy_write16(struct dsa_switch *ds, int addr, int reg,
 	return lan937x_internal_phy_write(dev, addr, reg, val);
 }
 
+static void lan937x_get_strings(struct dsa_switch *ds, int port, u32 stringset,
+				uint8_t *buf)
+{
+	struct ksz_device *dev = ds->priv;
+	int i;
+
+	if (stringset != ETH_SS_STATS)
+		return;
+
+	for (i = 0; i < dev->mib_cnt; i++) {
+		memcpy(buf + i * ETH_GSTRING_LEN, lan937x_mib_names[i].string,
+		       ETH_GSTRING_LEN);
+	}
+}
+
 static void lan937x_port_stp_state_set(struct dsa_switch *ds, int port,
 				       u8 state)
 {
@@ -384,6 +399,9 @@ const struct dsa_switch_ops lan937x_switch_ops = {
 	.phy_read = lan937x_phy_read16,
 	.phy_write = lan937x_phy_write16,
 	.port_enable = ksz_enable_port,
+	.get_strings = lan937x_get_strings,
+	.get_ethtool_stats = ksz_get_ethtool_stats,
+	.get_sset_count = ksz_sset_count,
 	.port_bridge_join = ksz_port_bridge_join,
 	.port_bridge_leave = ksz_port_bridge_leave,
 	.port_stp_state_set = lan937x_port_stp_state_set,
-- 
2.27.0