[PATCH net-next v2 2/8] net: stmmac: simplify stmmac_get_version()

[Russell King (Oracle)]

We can simplify stmmac_get_version() by pre-initialising the version
members to zero, detecting the MAC100 core and returning, otherwise
determining the version register offset separately from calling
stmmac_get_id() and stmmac_get_dev_id(). Do this.

Reviewed-by: Andrew Lunn <andrew at lunn.ch>
Tested-by: Maxime Chevallier <maxime.chevallier at bootlin.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
--
v2: fix "verison" -> "version" typo (and subsequent patches)
---
 drivers/net/ethernet/stmicro/stmmac/hwif.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
index 44e34b6ab90a..6b001d3f57c6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -49,18 +49,22 @@ static void stmmac_get_version(struct stmmac_priv *priv,
 			       struct stmmac_version *ver)
 {
 	enum dwmac_core_type core_type = priv->plat->core_type;
+	unsigned int version_offset;
 
+	ver->snpsver = 0;
 	ver->dev_id = 0;
 
-	if (core_type == DWMAC_CORE_GMAC) {
-		ver->snpsver = stmmac_get_id(priv, GMAC_VERSION);
-	} else if (dwmac_is_xmac(core_type)) {
-		ver->snpsver = stmmac_get_id(priv, GMAC4_VERSION);
-		if (core_type == DWMAC_CORE_XGMAC)
-			ver->dev_id = stmmac_get_dev_id(priv, GMAC4_VERSION);
-	} else {
-		ver->snpsver = 0;
-	}
+	if (core_type == DWMAC_CORE_MAC100)
+		return;
+
+	if (core_type == DWMAC_CORE_GMAC)
+		version_offset = GMAC_VERSION;
+	else
+		version_offset = GMAC4_VERSION;
+
+	ver->snpsver = stmmac_get_id(priv, version_offset);
+	if (core_type == DWMAC_CORE_XGMAC)
+		ver->dev_id = stmmac_get_dev_id(priv, version_offset);
 }
 
 static void stmmac_dwmac_mode_quirk(struct stmmac_priv *priv)
-- 
2.47.3