Merge branch 'net-stmmac-qcom-ethqos-simplifications'

Russell King says:

====================
net: stmmac: qcom-ethqos: simplifications

Remove unnecessary code from the qcom-ethqos glue driver.

Start by consistently using -> serdes_speed to set the speed of the
serdes PHY rather than sometimes using ->serdes_speed and sometimes
using ->speed.

This then allows the removal of ->speed in the second patch.

There is no need to set the maximum speed just because we're using
2500BASE-X - phylink already knows that 2500BASE-X can't support
faster speeds.

This then makes qcom_ethqos_speed_mode_2500() redundant as it's
setting the interface mode to the value that was determined in the
switch statement that already determined that the interface mode
had this value.

Not tested on hardware.
====================

Link: https://patch.msgid.link/Z_p0LzY2_HFupWK0@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 15 insertions, 28 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 0e4da216f942..e30bdf72331a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -106,12 +106,11 @@ struct qcom_ethqos {
 	struct platform_device *pdev;
 	void __iomem *rgmii_base;
 	void __iomem *mac_base;
-	int (*configure_func)(struct qcom_ethqos *ethqos);
+	int (*configure_func)(struct qcom_ethqos *ethqos, int speed);
 
 	unsigned int link_clk_rate;
 	struct clk *link_clk;
 	struct phy *serdes_phy;
-	int speed;
 	int serdes_speed;
 	phy_interface_t phy_mode;
 
@@ -385,7 +384,7 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 	return 0;
 }
 
-static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
+static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
 {
 	struct device *dev = &ethqos->pdev->dev;
 	int phase_shift;
@@ -412,7 +411,7 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
 	rgmii_updatel(ethqos, RGMII_CONFIG_INTF_SEL,
 		      0, RGMII_IO_MACRO_CONFIG);
 
-	switch (ethqos->speed) {
+	switch (speed) {
 	case SPEED_1000:
 		rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
 			      RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
@@ -532,14 +531,14 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
 			      loopback, RGMII_IO_MACRO_CONFIG);
 		break;
 	default:
-		dev_err(dev, "Invalid speed %d\n", ethqos->speed);
+		dev_err(dev, "Invalid speed %d\n", speed);
 		return -EINVAL;
 	}
 
 	return 0;
 }
 
-static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos)
+static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos, int speed)
 {
 	struct device *dev = &ethqos->pdev->dev;
 	volatile unsigned int dll_lock;
@@ -562,7 +561,7 @@ static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos)
 		      SDCC_DLL_CONFIG_PDN, SDCC_HC_REG_DLL_CONFIG);
 
 	if (ethqos->has_emac_ge_3) {
-		if (ethqos->speed == SPEED_1000) {
+		if (speed == SPEED_1000) {
 			rgmii_writel(ethqos, 0x1800000, SDCC_TEST_CTL);
 			rgmii_writel(ethqos, 0x2C010800, SDCC_USR_CTL);
 			rgmii_writel(ethqos, 0xA001, SDCC_HC_REG_DLL_CONFIG2);
@@ -580,7 +579,7 @@ static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos)
 	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_PDN, 0,
 		      SDCC_HC_REG_DLL_CONFIG);
 
-	if (ethqos->speed != SPEED_100 && ethqos->speed != SPEED_10) {
+	if (speed != SPEED_100 && speed != SPEED_10) {
 		/* Set DLL_EN */
 		rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
 			      SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
@@ -607,10 +606,10 @@ static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos)
 			dev_err(dev, "Timeout while waiting for DLL lock\n");
 	}
 
-	if (ethqos->speed == SPEED_1000)
+	if (speed == SPEED_1000)
 		ethqos_dll_configure(ethqos);
 
-	ethqos_rgmii_macro_init(ethqos);
+	ethqos_rgmii_macro_init(ethqos, speed);
 
 	return 0;
 }
@@ -626,7 +625,7 @@ static void ethqos_set_serdes_speed(struct qcom_ethqos *ethqos, int speed)
 /* On interface toggle MAC registers gets reset.
  * Configure MAC block for SGMII on ethernet phy link up
  */
-static int ethqos_configure_sgmii(struct qcom_ethqos *ethqos)
+static int ethqos_configure_sgmii(struct qcom_ethqos *ethqos, int speed)
 {
 	struct net_device *dev = platform_get_drvdata(ethqos->pdev);
 	struct stmmac_priv *priv = netdev_priv(dev);
@@ -634,7 +633,7 @@ static int ethqos_configure_sgmii(struct qcom_ethqos *ethqos)
 
 	val = readl(ethqos->mac_base + MAC_CTRL_REG);
 
-	switch (ethqos->speed) {
+	switch (speed) {
 	case SPEED_2500:
 		val &= ~ETHQOS_MAC_CTRL_PORT_SEL;
 		rgmii_updatel(ethqos, RGMII_CONFIG2_RGMII_CLK_SEL_CFG,
@@ -673,17 +672,9 @@ static int ethqos_configure_sgmii(struct qcom_ethqos *ethqos)
 	return val;
 }
 
-static void qcom_ethqos_speed_mode_2500(struct net_device *ndev, void *data)
+static int ethqos_configure(struct qcom_ethqos *ethqos, int speed)
 {
-	struct stmmac_priv *priv = netdev_priv(ndev);
-
-	priv->plat->max_speed = 2500;
-	priv->plat->phy_interface = PHY_INTERFACE_MODE_2500BASEX;
-}
-
-static int ethqos_configure(struct qcom_ethqos *ethqos)
-{
-	return ethqos->configure_func(ethqos);
+	return ethqos->configure_func(ethqos, speed);
 }
 
 static void ethqos_fix_mac_speed(void *priv, int speed, unsigned int mode)
@@ -691,9 +682,8 @@ static void ethqos_fix_mac_speed(void *priv, int speed, unsigned int mode)
 	struct qcom_ethqos *ethqos = priv;
 
 	qcom_ethqos_set_sgmii_loopback(ethqos, false);
-	ethqos->speed = speed;
 	ethqos_update_link_clk(ethqos, speed);
-	ethqos_configure(ethqos);
+	ethqos_configure(ethqos, speed);
 }
 
 static int qcom_ethqos_serdes_powerup(struct net_device *ndev, void *priv)
@@ -709,7 +699,7 @@ static int qcom_ethqos_serdes_powerup(struct net_device *ndev, void *priv)
 	if (ret)
 		return ret;
 
-	return phy_set_speed(ethqos->serdes_phy, ethqos->speed);
+	return phy_set_speed(ethqos->serdes_phy, ethqos->serdes_speed);
 }
 
 static void qcom_ethqos_serdes_powerdown(struct net_device *ndev, void *priv)
@@ -803,8 +793,6 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		ethqos->configure_func = ethqos_configure_rgmii;
 		break;
 	case PHY_INTERFACE_MODE_2500BASEX:
-		plat_dat->speed_mode_2500 = qcom_ethqos_speed_mode_2500;
-		fallthrough;
 	case PHY_INTERFACE_MODE_SGMII:
 		ethqos->configure_func = ethqos_configure_sgmii;
 		break;
@@ -847,7 +835,6 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, PTR_ERR(ethqos->serdes_phy),
 				     "Failed to get serdes phy\n");
 
-	ethqos->speed = SPEED_1000;
 	ethqos->serdes_speed = SPEED_1000;
 	ethqos_update_link_clk(ethqos, SPEED_1000);
 	ethqos_set_func_clk_en(ethqos);