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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
@@ -856,7 +856,7 @@ 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
@@ -177,6 +177,14 @@ 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.
*/
@@ -243,7 +251,7 @@ 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);
@@ -263,6 +271,8 @@ static int stmmac_probe_config_dt(struct
return 0;
+err2:
+ of_node_put(np);
err:
return ret;
}
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