On emulation systems, the EMAC's internal PHY ("SGMII") is not present,
but is not needed for network functionality. So just display a warning
message and ignore the SGMII.
Tested-by: Philip Elcan <[email protected]>
Tested-by: Adam Wallis <[email protected]>
Signed-off-by: Timur Tabi <[email protected]>
---
drivers/net/ethernet/qualcomm/emac/emac-sgmii.c | 23 +++++++++++++++++++++--
1 file changed, 21 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
index 18c184e..29ba37a 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
@@ -297,6 +297,14 @@ static int emac_sgmii_acpi_match(struct device *dev, void
*data)
{}
};
+/* Dummy function for systems without an internal PHY. This avoids having
+ * to check for NULL pointers before calling the functions.
+ */
+static int emac_sgmii_dummy(struct emac_adapter *adpt)
+{
+ return 0;
+}
+
int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt)
{
struct platform_device *sgmii_pdev = NULL;
@@ -311,8 +319,19 @@ int emac_sgmii_config(struct platform_device *pdev, struct
emac_adapter *adpt)
emac_sgmii_acpi_match);
if (!dev) {
- dev_err(&pdev->dev, "cannot find internal phy node\n");
- return -ENODEV;
+ dev_warn(&pdev->dev, "cannot find internal phy node\n");
+ /* There is typically no internal PHY on emulation
+ * systems, so if we can't find the node, assume
+ * we are on an emulation system and stub-out
+ * support for the internal PHY. These systems only
+ * use ACPI.
+ */
+ phy->open = emac_sgmii_dummy;
+ phy->close = emac_sgmii_dummy;
+ phy->link_up = emac_sgmii_dummy;
+ phy->link_down = emac_sgmii_dummy;
+
+ return 0;
}
sgmii_pdev = to_platform_device(dev);
--
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm
Technologies, Inc. Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
