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; }