Ethernet : modify tx and rx delay for RK3288

R2.0 & R2.01A: tx = 0x21 , rx = 0x15
R2.01B: tx = 0x15 , rx = 0x1C

Change-Id: I8e73b04aef631761dc399b44afb0943f1e486eaa

Author: tom-shen-asus

drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c

@@ -1401,6 +1401,7 @@ static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
 	return 0;
 }
 
+extern int get_board_id(void);
 static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 					  struct plat_stmmacenet_data *plat,
 					  const struct rk_gmac_ops *ops)
@@ -1410,6 +1411,12 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 	int ret;
 	const char *strings = NULL;
 	int value;
+	int tx_delay_r201a = 0x21, rx_delay_r201a = 0x15;
+	int tx_delay_r201b = 0x15, rx_delay_r201b = 0x1c;
+	bool is_r20 = get_board_id() == 3 ? true: false;
+	bool is_r201a = get_board_id() == 4 ? true: false;
+	bool is_r201b = get_board_id() == 5 ? true: false;
+	printk("%s: #### boardid = %d\n", __func__, get_board_id());
 
 	bsp_priv = devm_kzalloc(dev, sizeof(*bsp_priv), GFP_KERNEL);
 	if (!bsp_priv)
@@ -1463,6 +1470,15 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 		bsp_priv->rx_delay = value;
 	}
 
+	if (is_r201a || is_r20) {
+		bsp_priv->tx_delay = tx_delay_r201a;
+		bsp_priv->rx_delay = rx_delay_r201a;
+	} else if (is_r201b) {
+		bsp_priv->tx_delay = tx_delay_r201b;
+		bsp_priv->rx_delay = rx_delay_r201b;
+	}
+	dev_info(dev, "Tune TX delay(0x%x) RX delay(0x%x).\n", bsp_priv->tx_delay, bsp_priv->rx_delay);
+
 	bsp_priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
 							"rockchip,grf");