From: Mathieu Olivari <mathieu@codeaurora.org>
Date: Wed, 27 May 2015 18:02:48 +0000 (-0700)
Subject: stmmac: add fixed-link device-tree support
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=277323814e495616dd76409bec855f5c68f54988;p=linux-beck.git

stmmac: add fixed-link device-tree support

In case DT is used, this change adds the ability to the stmmac driver to
detect a fixed-link PHY, instanciate it, and use it during
phy_connect().

Fixed link PHYs DT usage is described in:
Documentation/devicetree/bindings/net/fixed-link.txt

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 31c64169f2ec..c46178cf4d50 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -856,7 +856,7 @@ static int stmmac_init_phy(struct net_device *dev)
 	 * device as well.
 	 * Note: phydev->phy_id is the result of reading the UID PHY registers.
 	 */
-	if (phydev->phy_id == 0) {
+	if (!priv->plat->phy_node && phydev->phy_id == 0) {
 		phy_disconnect(phydev);
 		return -ENODEV;
 	}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 8d23155a1a7e..f3918c7e7eeb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -148,6 +148,14 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
 	/* If we find a phy-handle property, use it as the PHY */
 	plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
 
+	/* If phy-handle is not specified, check if we have a fixed-phy */
+	if (!plat->phy_node && of_phy_is_fixed_link(np)) {
+		if ((of_phy_register_fixed_link(np) < 0))
+			return -ENODEV;
+
+		plat->phy_node = of_node_get(np);
+	}
+
 	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
 	 * and warn of its use. Remove this when phy node support is added.
 	 */
@@ -212,8 +220,10 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
 	if (of_find_property(np, "snps,pbl", NULL)) {
 		dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
 				       GFP_KERNEL);
-		if (!dma_cfg)
+		if (!dma_cfg) {
+			of_node_put(np);
 			return -ENOMEM;
+		}
 		plat->dma_cfg = dma_cfg;
 		of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
 		dma_cfg->fixed_burst =