net: davinci_emac: simplify the OF parser code

This patch cleans up the OF parser code, removes unnecessary checks
on of_property_read_*() and guards davinci_emac_of_match table with
CONFIG_OF.
Signed-off-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/davinci_emac.c

@@ -1754,29 +1754,22 @@ static const struct net_device_ops emac_netdev_ops = {
 #endif
 };
 
-#ifdef CONFIG_OF
-static struct emac_platform_data
-	*davinci_emac_of_get_pdata(struct platform_device *pdev,
-	struct emac_priv *priv)
+static struct emac_platform_data *
+davinci_emac_of_get_pdata(struct platform_device *pdev, struct emac_priv *priv)
 {
 	struct device_node *np;
 	struct emac_platform_data *pdata = NULL;
 	const u8 *mac_addr;
-	u32 data;
-	int ret;
 
-	pdata = pdev->dev.platform_data;
-	if (!pdata) {
-		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
-		if (!pdata)
-			goto nodata;
-	}
+	if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node)
+		return pdev->dev.platform_data;
+
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return NULL;
 
 	np = pdev->dev.of_node;
-	if (!np)
-		goto nodata;
-	else
-		pdata->version = EMAC_VERSION_2;
+	pdata->version = EMAC_VERSION_2;
 
 	if (!is_valid_ether_addr(pdata->mac_addr)) {
 		mac_addr = of_get_mac_address(np);
@@ -1784,47 +1777,31 @@ static struct emac_platform_data
 			memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
 	}
 
-	ret = of_property_read_u32(np, "ti,davinci-ctrl-reg-offset", &data);
-	if (!ret)
-		pdata->ctrl_reg_offset = data;
+	of_property_read_u32(np, "ti,davinci-ctrl-reg-offset",
+			     &pdata->ctrl_reg_offset);
 
-	ret = of_property_read_u32(np, "ti,davinci-ctrl-mod-reg-offset",
-		&data);
-	if (!ret)
-		pdata->ctrl_mod_reg_offset = data;
+	of_property_read_u32(np, "ti,davinci-ctrl-mod-reg-offset",
+			     &pdata->ctrl_mod_reg_offset);
 
-	ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-offset", &data);
-	if (!ret)
-		pdata->ctrl_ram_offset = data;
+	of_property_read_u32(np, "ti,davinci-ctrl-ram-offset",
+			     &pdata->ctrl_ram_offset);
 
-	ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-size", &data);
-	if (!ret)
-		pdata->ctrl_ram_size = data;
+	of_property_read_u32(np, "ti,davinci-ctrl-ram-size",
+			     &pdata->ctrl_ram_size);
 
-	ret = of_property_read_u32(np, "ti,davinci-rmii-en", &data);
-	if (!ret)
-		pdata->rmii_en = data;
+	of_property_read_u8(np, "ti,davinci-rmii-en", &pdata->rmii_en);
 
-	ret = of_property_read_u32(np, "ti,davinci-no-bd-ram", &data);
-	if (!ret)
-		pdata->no_bd_ram = data;
+	pdata->no_bd_ram = of_property_read_bool(np, "ti,davinci-no-bd-ram");
 
 	priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
 	if (!priv->phy_node)
 		pdata->phy_id = "";
 
 	pdev->dev.platform_data = pdata;
-nodata:
+
 	return  pdata;
 }
-#else
-static struct emac_platform_data
-	*davinci_emac_of_get_pdata(struct platform_device *pdev,
-	struct emac_priv *priv)
-{
-	return  pdev->dev.platform_data;
-}
-#endif
+
 /**
  * davinci_emac_probe - EMAC device probe
  * @pdev: The DaVinci EMAC device that we are removing
@@ -2045,11 +2022,13 @@ static const struct dev_pm_ops davinci_emac_pm_ops = {
 	.resume		= davinci_emac_resume,
 };
 
+#if IS_ENABLED(CONFIG_OF)
 static const struct of_device_id davinci_emac_of_match[] = {
 	{.compatible = "ti,davinci-dm6467-emac", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, davinci_emac_of_match);
+#endif
 
 /* davinci_emac_driver: EMAC platform driver structure */
 static struct platform_driver davinci_emac_driver = {