ipq806x: replace caf nss-gmac driver by upstream stmmac

This driver has been cherry-picked and backported from the following
LKML thread:
*https://lkml.org/lkml/2015/5/26/744

It also updates the DT accordingly.

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 45831

1 files changed, 64 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-3.18/703-stmmac-add-fixed-link-device-tree-support.patch b/target/linux/ipq806x/patches-3.18/703-stmmac-add-fixed-link-device-tree-support.patch
new file mode 100644
index 0000000000..3c20fe477e
--- /dev/null
+++ b/target/linux/ipq806x/patches-3.18/703-stmmac-add-fixed-link-device-tree-support.patch
@@ -0,0 +1,64 @@
+From 3a95f75867be562cb919ff23a738f70357188fbd Mon Sep 17 00:00:00 2001
+From: Mathieu Olivari <mathieu@codeaurora.org>
+Date: Fri, 8 May 2015 16:02:03 -0700
+Subject: [PATCH 3/8] 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>
+---
+ drivers/net/ethernet/stmicro/stmmac/stmmac_main.c     |  2 +-
+ drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 12 +++++++++++-
+ 2 files changed, 12 insertions(+), 2 deletions(-)
+
+--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
++++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+@@ -858,7 +858,7 @@ static int stmmac_init_phy(struct net_de
+ 	 * 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;
+ 	}
+--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
++++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+@@ -164,6 +164,14 @@ static int stmmac_probe_config_dt(struct
+ 	/* 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.
+ 	 */
+@@ -226,7 +234,7 @@ static int stmmac_probe_config_dt(struct
+ 				       GFP_KERNEL);
+ 		if (!dma_cfg) {
+ 			ret = -ENOMEM;
+-			goto err;
++			goto err2;
+ 		}
+ 		plat->dma_cfg = dma_cfg;
+ 		of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
+@@ -243,6 +251,8 @@ static int stmmac_probe_config_dt(struct
+ 
+ 	return 0;
+ 
++err2:
++	of_node_put(np);
+ err:
+ 	return ret;
+ }