net: keystone_net: use general get link function

The phy framework has function to get link, so use it
instead of own implementation.

There is no reason to check SGMII link while sending each
packet, phy link is enough. Check SGMII link only while
ethernet open.

Acked-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>

drivers/net/keystone_net.c

@@ -42,8 +42,6 @@ struct rx_buff_desc net_rx_buffs = {
 
 static void keystone2_net_serdes_setup(void);
 
-static int gen_get_link_speed(int phy_addr);
-
 int keystone2_eth_read_mac_addr(struct eth_device *dev)
 {
 	struct eth_priv_t *eth_priv;
@@ -137,19 +135,6 @@ static int keystone2_mdio_write(struct mii_dev *bus,
 	return 0;
 }
 
-/* PHY functions for a generic PHY */
-static int gen_get_link_speed(int phy_addr)
-{
-	u_int16_t tmp;
-
-	tmp = mdio_bus->read(mdio_bus, phy_addr,
-			     MDIO_DEVAD_NONE, MII_STATUS_REG);
-	if (tmp & 0x04)
-		return 0;
-
-	return -1;
-}
-
 static void  __attribute__((unused))
 	keystone2_eth_gigabit_enable(struct eth_device *dev)
 {
@@ -180,35 +165,8 @@ int keystone_sgmii_link_status(int port)
 
 	status = __raw_readl(SGMII_STATUS_REG(port));
 
-	return status & SGMII_REG_STATUS_LINK;
-}
-
-
-int keystone_get_link_status(struct eth_device *dev)
-{
-	struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
-	int sgmii_link;
-	int link_state = 0;
-#if CONFIG_GET_LINK_STATUS_ATTEMPTS > 1
-	int j;
-
-	for (j = 0; (j < CONFIG_GET_LINK_STATUS_ATTEMPTS) && (link_state == 0);
-	     j++) {
-#endif
-		sgmii_link =
-			keystone_sgmii_link_status(eth_priv->slave_port - 1);
-
-		if (sgmii_link) {
-			link_state = 1;
-
-			if (eth_priv->sgmii_link_type == SGMII_LINK_MAC_PHY)
-				if (gen_get_link_speed(eth_priv->phy_addr))
-					link_state = 0;
-		}
-#if CONFIG_GET_LINK_STATUS_ATTEMPTS > 1
-	}
-#endif
-	return link_state;
+	return (status & SGMII_REG_STATUS_LOCK) &&
+	       (status & SGMII_REG_STATUS_LINK);
 }
 
 int keystone_sgmii_config(int port, int interface)
@@ -490,8 +448,10 @@ static int keystone2_eth_send_packet(struct eth_device *dev,
 {
 	int ret_status = -1;
 	struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
+	struct phy_device *phy_dev = eth_priv->phy_dev;
 
-	if (keystone_get_link_status(dev) == 0)
+	genphy_update_link(phy_dev);
+	if (phy_dev->link == 0)
 		return -1;
 
 	if (cpmac_drv_send((u32 *)packet, length, eth_priv->slave_port) != 0)

include/configs/ks2_evm.h

@@ -101,7 +101,6 @@
 #define CONFIG_BOOTP_SEND_HOSTNAME
 #define CONFIG_NET_RETRY_COUNT		32
 #define CONFIG_NET_MULTI
-#define CONFIG_GET_LINK_STATUS_ATTEMPTS	5
 #define CONFIG_SYS_SGMII_REFCLK_MHZ	312
 #define CONFIG_SYS_SGMII_LINERATE_MHZ	1250
 #define CONFIG_SYS_SGMII_RATESCALE	2