From: David Rivshin <drivshin@xxxxxxxxxxx> The phy-handle, phy_id, and fixed-link properties are mutually exclusive, and only one need be specified. However if phy-handle was specified, an error message would complain about the lack of phy_id or fixed-link. Also, if phy-handle was specified and the subsequent of_phy_connect() failed, the error message still referenced slaved->data->phy_id, which would be empty. Instead, use the name of the device_node as a useful identifier. Fixes: 9e42f715264f ("drivers: net: cpsw: add phy-handle parsing") Signed-off-by: David Rivshin <drivshin@xxxxxxxxxxx> Acked-by: Rob Herring <robh@xxxxxxxxxx> Tested-by: Nicolas Chauvet <kwizart@xxxxxxxxx> --- If would like this for -stable it should apply cleanly as far back as 4.5. It failes on 4.4 due to some context differences, but can be applied with 'git am -C2'. Or, I can produce a separate patch against linux-4.4.y if preferred. Changes since v1 [1]: - Rebased (no conflicts) - Added Tested-by from Nicolas Chauvet - Added Acked-by from Rob Herring for the binding change [1] https://patchwork.ozlabs.org/patch/560324/ Documentation/devicetree/bindings/net/cpsw.txt | 4 ++-- drivers/net/ethernet/ti/cpsw.c | 17 +++++++++++++---- 2 files changed, 15 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt index 28a4781..3033c0f 100644 --- a/Documentation/devicetree/bindings/net/cpsw.txt +++ b/Documentation/devicetree/bindings/net/cpsw.txt @@ -46,16 +46,16 @@ Optional properties: - dual_emac_res_vlan : Specifies VID to be used to segregate the ports - mac-address : See ethernet.txt file in the same directory - phy_id : Specifies slave phy id - phy-handle : See ethernet.txt file in the same directory Slave sub-nodes: - fixed-link : See fixed-link.txt file in the same directory - Either the property phy_id, or the sub-node - fixed-link can be specified + +Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified. Note: "ti,hwmods" field is used to fetch the base address and irq resources from TI, omap hwmod data base during device registration. Future plan is to migrate hwmod data base contents into device tree blob so that, all the required data will be used from device tree dts file. diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index d69cb3f..3c81413 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -1150,16 +1150,19 @@ static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv) if (slave->data->phy_node) slave->phy = of_phy_connect(priv->ndev, slave->data->phy_node, &cpsw_adjust_link, 0, slave->data->phy_if); else slave->phy = phy_connect(priv->ndev, slave->data->phy_id, &cpsw_adjust_link, slave->data->phy_if); if (IS_ERR(slave->phy)) { - dev_err(priv->dev, "phy %s not found on slave %d\n", - slave->data->phy_id, slave->slave_num); + dev_err(priv->dev, "phy \"%s\" not found on slave %d\n", + slave->data->phy_node ? + slave->data->phy_node->full_name : + slave->data->phy_id, + slave->slave_num); slave->phy = NULL; } else { phy_attached_info(slave->phy); phy_start(slave->phy); /* Configure GMII_SEL register */ @@ -2030,15 +2033,19 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, /* This is no slave child node, continue */ if (strcmp(slave_node->name, "slave")) continue; slave_data->phy_node = of_parse_phandle(slave_node, "phy-handle", 0); parp = of_get_property(slave_node, "phy_id", &lenp); - if (of_phy_is_fixed_link(slave_node)) { + if (slave_data->phy_node) { + dev_dbg(&pdev->dev, + "slave[%d] using phy-handle=\"%s\"\n", + i, slave_data->phy_node->full_name); + } else if (of_phy_is_fixed_link(slave_node)) { struct device_node *phy_node; struct phy_device *phy_dev; /* In the case of a fixed PHY, the DT node associated * to the PHY is the Ethernet MAC DT node. */ ret = of_phy_register_fixed_link(slave_node); @@ -2067,15 +2074,17 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, if (!mdio) { dev_err(&pdev->dev, "Missing mdio platform device\n"); return -EINVAL; } snprintf(slave_data->phy_id, sizeof(slave_data->phy_id), PHY_ID_FMT, mdio->name, phyid); } else { - dev_err(&pdev->dev, "No slave[%d] phy_id or fixed-link property\n", i); + dev_err(&pdev->dev, + "No slave[%d] phy_id, phy-handle, or fixed-link property\n", + i); goto no_phy_slave; } slave_data->phy_if = of_get_phy_mode(slave_node); if (slave_data->phy_if < 0) { dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n", i); return slave_data->phy_if; -- 2.5.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html