netdev - [PATCH net-next 2/2] net: pcs: lynx: consolidate sgmii and 1000base-x config code

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Message-Id: <E1o4Ltq-003fYG-TO@rmk-PC.armlinux.org.uk>
Date:   Thu, 23 Jun 2022 13:25:30 +0100
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     Ioana Ciornei <ioana.ciornei@....com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next 2/2] net: pcs: lynx: consolidate sgmii and 1000base-x
 config code

Consolidate lynx_pcs_config_1000basex() and lynx_pcs_config_sgmii() into
a single function. The differences between these two are:

- The value that the link timer is set to.
- The value of the IF_MODE register.

Everything else is identical.

This patch depends on "net: phylink: add QSGMII support to
phylink_mii_c22_pcs_encode_advertisement()".

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/pcs/pcs-lynx.c | 56 ++++++++++++++------------------------
 1 file changed, 21 insertions(+), 35 deletions(-)

diff --git a/drivers/net/pcs/pcs-lynx.c b/drivers/net/pcs/pcs-lynx.c
index bdad8e283e97..7d5fc7f54b2f 100644
--- a/drivers/net/pcs/pcs-lynx.c
+++ b/drivers/net/pcs/pcs-lynx.c
@@ -122,53 +122,39 @@ static void lynx_pcs_get_state(struct phylink_pcs *pcs,
 		state->link, state->an_enabled, state->an_complete);
 }
 
-static int lynx_pcs_config_1000basex(struct mdio_device *pcs,
-				     unsigned int mode,
-				     const unsigned long *advertising)
+static int lynx_pcs_config_giga(struct mdio_device *pcs, unsigned int mode,
+				phy_interface_t interface,
+				const unsigned long *advertising)
 {
 	u32 link_timer;
-	int err;
-
-	link_timer = LINK_TIMER_VAL(IEEE8023_LINK_TIMER_NS);
-	mdiodev_write(pcs, LINK_TIMER_LO, link_timer & 0xffff);
-	mdiodev_write(pcs, LINK_TIMER_HI, link_timer >> 16);
-
-	err = mdiodev_modify(pcs, IF_MODE,
-			     IF_MODE_SGMII_EN | IF_MODE_USE_SGMII_AN,
-			     0);
-	if (err)
-		return err;
-
-	return phylink_mii_c22_pcs_config(pcs, mode,
-					  PHY_INTERFACE_MODE_1000BASEX,
-					  advertising);
-}
-
-static int lynx_pcs_config_sgmii(struct mdio_device *pcs, unsigned int mode,
-				 const unsigned long *advertising)
-{
 	u16 if_mode;
 	int err;
 
-	if_mode = IF_MODE_SGMII_EN;
-	if (mode == MLO_AN_INBAND) {
-		u32 link_timer;
-
-		if_mode |= IF_MODE_USE_SGMII_AN;
-
-		/* Adjust link timer for SGMII */
-		link_timer = LINK_TIMER_VAL(SGMII_AN_LINK_TIMER_NS);
+	if (interface == PHY_INTERFACE_MODE_1000BASEX) {
+		link_timer = LINK_TIMER_VAL(IEEE8023_LINK_TIMER_NS);
 		mdiodev_write(pcs, LINK_TIMER_LO, link_timer & 0xffff);
 		mdiodev_write(pcs, LINK_TIMER_HI, link_timer >> 16);
+
+		if_mode = 0;
+	} else {
+		if_mode = IF_MODE_SGMII_EN;
+		if (mode == MLO_AN_INBAND) {
+			if_mode |= IF_MODE_USE_SGMII_AN;
+
+			/* Adjust link timer for SGMII */
+			link_timer = LINK_TIMER_VAL(SGMII_AN_LINK_TIMER_NS);
+			mdiodev_write(pcs, LINK_TIMER_LO, link_timer & 0xffff);
+			mdiodev_write(pcs, LINK_TIMER_HI, link_timer >> 16);
+		}
 	}
+
 	err = mdiodev_modify(pcs, IF_MODE,
 			     IF_MODE_SGMII_EN | IF_MODE_USE_SGMII_AN,
 			     if_mode);
 	if (err)
 		return err;
 
-	return phylink_mii_c22_pcs_config(pcs, mode, PHY_INTERFACE_MODE_SGMII,
-					 advertising);
+	return phylink_mii_c22_pcs_config(pcs, mode, interface, advertising);
 }
 
 static int lynx_pcs_config_usxgmii(struct mdio_device *pcs, unsigned int mode,
@@ -198,10 +184,10 @@ static int lynx_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
 
 	switch (ifmode) {
 	case PHY_INTERFACE_MODE_1000BASEX:
-		return lynx_pcs_config_1000basex(lynx->mdio, mode, advertising);
 	case PHY_INTERFACE_MODE_SGMII:
 	case PHY_INTERFACE_MODE_QSGMII:
-		return lynx_pcs_config_sgmii(lynx->mdio, mode, advertising);
+		return lynx_pcs_config_giga(lynx->mdio, mode, ifmode,
+					    advertising);
 	case PHY_INTERFACE_MODE_2500BASEX:
 		if (phylink_autoneg_inband(mode)) {
 			dev_err(&lynx->mdio->dev,
-- 
2.30.2