linux-kernel - [PATCH 4.4 158/312] drivers: net: cpsw: dont ignore phy-mode if phy-handle is used

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Message-Id: <20200508123135.567401154@linuxfoundation.org>
Date:   Fri,  8 May 2020 14:32:29 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, David Rivshin <drivshin@...worx.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Andrew Goodbody <andrew.goodbody@...brionix.com>,
        Mugunthan V N <mugunthanvnm@...com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 158/312] drivers: net: cpsw: dont ignore phy-mode if phy-handle is used

From: David Rivshin <drivshin@...worx.com>

commit ae092b5bded24d5dc7dae0e0aef4669c169ce874 upstream.

The phy-mode emac property was only being processed in the phy_id
or fixed-link cases. However if phy-handle was specified instead,
an error message would complain about the lack of phy_id or
fixed-link, and then jump past the of_get_phy_mode(). This would
result in the PHY mode defaulting to MII, regardless of what the
devicetree specified.

Fixes: 9e42f715264f ("drivers: net: cpsw: add phy-handle parsing")
Signed-off-by: David Rivshin <drivshin@...worx.com>
Tested-by: Nicolas Chauvet <kwizart@...il.com>
Tested-by: Andrew Goodbody <andrew.goodbody@...brionix.com>
Reviewed-by: Mugunthan V N <mugunthanvnm@...com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/ti/cpsw.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -2060,7 +2060,11 @@ static int cpsw_probe_dt(struct cpsw_pla
 		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;
 
@@ -2097,7 +2101,9 @@ static int cpsw_probe_dt(struct cpsw_pla
 				 PHY_ID_FMT, mdio->name, phyid);
 			put_device(&mdio->dev);
 		} 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);