net: stmmac: remove unused PCS loopback support

Nothing calls stmmac_pcs_ctrl_ane() with the "loopback" argument set to
anything except zero, so this serves no useful purpose. Remove the
argument to reduce the code complexity.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6I-0000000Aola-3Sih@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

6 files changed, 9 insertions, 14 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index f62825220cf7..32244217d952 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -622,7 +622,7 @@ static void ethqos_set_serdes_speed(struct qcom_ethqos *ethqos, int speed)
 
 static void ethqos_pcs_set_inband(struct stmmac_priv *priv, bool enable)
 {
-	stmmac_pcs_ctrl_ane(priv, enable, 0, 0);
+	stmmac_pcs_ctrl_ane(priv, enable, 0);
 }
 
 /* On interface toggle MAC registers gets reset.
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
index 654331b411f4..5c653be3d453 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
@@ -358,9 +358,9 @@ static void dwmac1000_set_eee_timer(struct mac_device_info *hw, int ls, int tw)
 }
 
 static void dwmac1000_ctrl_ane(struct stmmac_priv *priv, bool ane,
-			       bool srgmi_ral, bool loopback)
+			       bool srgmi_ral)
 {
-	dwmac_ctrl_ane(priv->ioaddr, GMAC_PCS_BASE, ane, srgmi_ral, loopback);
+	dwmac_ctrl_ane(priv->ioaddr, GMAC_PCS_BASE, ane, srgmi_ral);
 }
 
 static void dwmac1000_debug(struct stmmac_priv *priv, void __iomem *ioaddr,
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index bff4c371c1d2..21e4461db937 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -583,10 +583,9 @@ static void dwmac4_flow_ctrl(struct mac_device_info *hw, unsigned int duplex,
 	}
 }
 
-static void dwmac4_ctrl_ane(struct stmmac_priv *priv, bool ane, bool srgmi_ral,
-			    bool loopback)
+static void dwmac4_ctrl_ane(struct stmmac_priv *priv, bool ane, bool srgmi_ral)
 {
-	dwmac_ctrl_ane(priv->ioaddr, GMAC_PCS_BASE, ane, srgmi_ral, loopback);
+	dwmac_ctrl_ane(priv->ioaddr, GMAC_PCS_BASE, ane, srgmi_ral);
 }
 
 static int dwmac4_irq_mtl_status(struct stmmac_priv *priv,
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index 14dbe0685997..7796f5f3c96f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -374,8 +374,8 @@ struct stmmac_ops {
 		      struct stmmac_extra_stats *x, u32 rx_queues,
 		      u32 tx_queues);
 	/* PCS calls */
-	void (*pcs_ctrl_ane)(struct stmmac_priv *priv, bool ane, bool srgmi_ral,
-			     bool loopback);
+	void (*pcs_ctrl_ane)(struct stmmac_priv *priv, bool ane,
+			     bool srgmi_ral);
 	/* Safety Features */
 	int (*safety_feat_config)(void __iomem *ioaddr, unsigned int asp,
 				  struct stmmac_safety_feature_cfg *safety_cfg);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 867d0ca3b45e..e21d96933408 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3493,7 +3493,7 @@ static int stmmac_hw_setup(struct net_device *dev)
 	}
 
 	if (priv->hw->pcs)
-		stmmac_pcs_ctrl_ane(priv, 1, priv->hw->ps, 0);
+		stmmac_pcs_ctrl_ane(priv, 1, priv->hw->ps);
 
 	/* set TX and RX rings length */
 	stmmac_set_rings_length(priv);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.h
index 4a684c97dfae..5778f5b2f313 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.h
@@ -82,13 +82,12 @@ static inline void dwmac_pcs_isr(void __iomem *ioaddr, u32 reg,
  * @reg: Base address of the AN Control Register.
  * @ane: to enable the auto-negotiation
  * @srgmi_ral: to manage MAC-2-MAC SGMII connections.
- * @loopback: to cause the PHY to loopback tx data into rx path.
  * Description: this is the main function to configure the AN control register
  * and init the ANE, select loopback (usually for debugging purpose) and
  * configure SGMII RAL.
  */
 static inline void dwmac_ctrl_ane(void __iomem *ioaddr, u32 reg, bool ane,
-				  bool srgmi_ral, bool loopback)
+				  bool srgmi_ral)
 {
 	u32 value = readl(ioaddr + GMAC_AN_CTRL(reg));
 
@@ -104,9 +103,6 @@ static inline void dwmac_ctrl_ane(void __iomem *ioaddr, u32 reg, bool ane,
 	if (srgmi_ral)
 		value |= GMAC_AN_CTRL_SGMRAL;
 
-	if (loopback)
-		value |= GMAC_AN_CTRL_ELE;
-
 	writel(value, ioaddr + GMAC_AN_CTRL(reg));
 }
 #endif /* __STMMAC_PCS_H__ */