[Patch net-next v15 06/13] net: dsa: microchip: lan937x: add dsa_tag_protocol

[Arun Ramadoss <arun.ramadoss@microchip.com>]

This patch update the ksz_get_tag_protocol to return LAN937x specific
tag if the chip id matches one of LAN937x series switch

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/dsa/microchip/ksz_common.c | 3 +++
 drivers/net/dsa/microchip/ksz_common.h | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 83e44598d00c..07b6f34a437e 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1254,6 +1254,9 @@ static enum dsa_tag_protocol ksz_get_tag_protocol(struct dsa_switch *ds,
 	    dev->chip_id == KSZ9567_CHIP_ID)
 		proto = DSA_TAG_PROTO_KSZ9477;
 
+	if (is_lan937x(dev))
+		proto = DSA_TAG_PROTO_LAN937X_VALUE;
+
 	return proto;
 }
 
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 5f69dc872752..bf4f3f3922a5 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -403,6 +403,15 @@ static inline void ksz_regmap_unlock(void *__mtx)
 	mutex_unlock(mtx);
 }
 
+static inline int is_lan937x(struct ksz_device *dev)
+{
+	return dev->chip_id == LAN9370_CHIP_ID ||
+		dev->chip_id == LAN9371_CHIP_ID ||
+		dev->chip_id == LAN9372_CHIP_ID ||
+		dev->chip_id == LAN9373_CHIP_ID ||
+		dev->chip_id == LAN9374_CHIP_ID;
+}
+
 /* STP State Defines */
 #define PORT_TX_ENABLE			BIT(2)
 #define PORT_RX_ENABLE			BIT(1)
-- 
2.36.1